{"id":7620,"date":"2025-11-13T09:11:56","date_gmt":"2025-11-13T08:11:56","guid":{"rendered":"https:\/\/www.polarpod.fr\/polar-encyclopedia\/arctic-plankton\/"},"modified":"2026-02-09T00:04:14","modified_gmt":"2026-02-08T23:04:14","slug":"arctic-plankton","status":"publish","type":"page","link":"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/arctic-plankton\/","title":{"rendered":"ARCTIC PLANKTON"},"content":{"rendered":"[vc_row type=&#8221;full_width_background&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bg_color=&#8221;#454156&#8243; scene_position=&#8221;center&#8221; top_padding=&#8221;4%&#8221; bottom_padding=&#8221;0%&#8221; text_color=&#8221;light&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; id=&#8221;intro&#8221; row_name=&#8221;Intro&#8221; color_overlay=&#8221;#0a0a0a&#8221; color_overlay_2=&#8221;#C02020&#8243; overlay_strength=&#8221;0.5&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;zoom-out-slow&#8221; gradient_type=&#8221;default&#8221; shape_type=&#8221;&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;top&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; centered_text=&#8221;true&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; column_padding_type=&#8221;default&#8221; gradient_type=&#8221;default&#8221;][vc_row_inner column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner top_padding_desktop=&#8221;2%&#8221; bottom_padding_desktop=&#8221;0&#8243; left_padding_desktop=&#8221;0&#8243; right_padding_desktop=&#8221;0&#8243; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;left&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; enable_animation=&#8221;true&#8221; animation=&#8221;fade-in-from-bottom&#8221; animation_easing=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; column_padding_type=&#8221;advanced&#8221; gradient_type=&#8221;default&#8221;][image_with_animation image_url=&#8221;4990&#8243; image_size=&#8221;full&#8221; max_width=&#8221;150%&#8221; max_width_mobile=&#8221;default&#8221; animation_type=&#8221;entrance&#8221; animation=&#8221;None&#8221; animation_movement_type=&#8221;transform_y&#8221; hover_animation=&#8221;none&#8221; alignment=&#8221;center&#8221; border_radius=&#8221;none&#8221; box_shadow=&#8221;none&#8221; image_loading=&#8221;default&#8221;][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row type=&#8221;full_width_background&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;5px&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bg_color=&#8221;#FFFFFF&#8221; scene_position=&#8221;center&#8221; top_padding=&#8221;1%&#8221; bottom_padding=&#8221;2%&#8221; left_padding_phone=&#8221;0&#8243; constrain_group_6=&#8221;yes&#8221; right_padding_phone=&#8221;0&#8243; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; id=&#8221;actu&#8221; row_name=&#8221;Actualit\u00e9&#8221; advanced_gradient_angle=&#8221;0&#8243; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221; gradient_type=&#8221;default&#8221; shape_type=&#8221;&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;0px&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; advanced_gradient_angle=&#8221;0&#8243; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; gradient_type=&#8221;default&#8221; column_padding_type=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; max_width=&#8221;700&#8243; text_direction=&#8221;default&#8221;]\n<h1 class=\"home_intro_title\" style=\"text-align: left;\"><span class=\"text-primary\" style=\"color: #ff5b00;\">The Polar Encyclopedia<\/span><\/h1>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row type=&#8221;full_width_background&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;30px&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bg_color=&#8221;#ffffff&#8221; scene_position=&#8221;center&#8221; top_padding=&#8221;4%&#8221; bottom_padding=&#8221;4%&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; id=&#8221;ATMOSPHERE&#8221; row_name=&#8221;Seul sur la banquise&#8221; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221; gradient_type=&#8221;default&#8221; shape_type=&#8221;&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; top_margin=&#8221;0%&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/4&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; column_padding_type=&#8221;default&#8221; gradient_type=&#8221;default&#8221;][vc_text_separator title=&#8221;CONTENTS&#8221; i_icon_fontawesome=&#8221;fa fa-bookmark-o&#8221; i_color=&#8221;custom&#8221; css=&#8221;&#8221; add_icon=&#8221;true&#8221; i_custom_color=&#8221;#FF6B1A&#8221;][toggles style=&#8221;default&#8221; border_radius=&#8221;none&#8221;][toggle color=&#8221;Default&#8221; heading_tag=&#8221;default&#8221; heading_tag_functionality=&#8221;default&#8221; title=&#8221;ALONE ON THE ICE PACK&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<ul>\n<li><a href=\"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/\">HOW MAN COPES WITH THE COLD<\/a><\/li>\n<li><a href=\"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/polar-encyclopedia-transmission-safety-rescue\/\">COMMUNICATION \u2013 SAFETY \u2013 ELERGENCY ASSISTANCE<\/a><\/li>\n<\/ul>\n[\/vc_column_text][\/toggle][\/toggles][toggles style=&#8221;default&#8221; border_radius=&#8221;none&#8221;][toggle color=&#8221;Default&#8221; heading_tag=&#8221;default&#8221; heading_tag_functionality=&#8221;default&#8221; title=&#8221;ATMOSPHERE AND WEATHER&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<ul>\n<li><a href=\"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/polar-encyclopedia-earths-atmosphere\/\">THE EARTH&#8217;S ATMOSPHERE<\/a><\/li>\n<li><a href=\"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/polar-encyclopedia-weather-forecasting-and-modeling\/\">WEATHER FORECASTING AND MODELING<\/a><\/li>\n<li><a href=\"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/polar-encyclopedia-the-polar-climate\/\">THE POLAR CLIMATE<\/a><\/li>\n<li><a href=\"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/polar-encyclopedia-the-solar-energy-balance\/\">THE SOLAR ENERGY BALANCE<\/a><\/li>\n<li><a href=\"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/polar-encyclopedia-greenhouse-effect\/\">THE GREENHOUSE EFFECT<\/a><\/li>\n<\/ul>\n[\/vc_column_text][\/toggle][\/toggles][toggles style=&#8221;default&#8221; accordion=&#8221;true&#8221; accordion_starting_functionality=&#8221;default&#8221; border_radius=&#8221;none&#8221;][toggle color=&#8221;Default&#8221; heading_tag=&#8221;default&#8221; heading_tag_functionality=&#8221;default&#8221; title=&#8221;ARCTIC ICE&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<ul>\n<li><a href=\"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/polar-encyclopedia-sea-ice\/\">SEA ICE: MARINE ICE<\/a><\/li>\n<li><a href=\"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/polar-encyclopedia-satellites-observe-the-sea-ice\/\">SATELLITES OBSERVE SEA ICE<\/a><\/li>\n<li><a href=\"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/icebergs-frozen-fresh-water\/\">ICEBERGS: FROZEN FRESH WATER<\/a><\/li>\n<li><a href=\"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/ice-climate-archives\/\">THE ARCTIC ICE: CLIMATE ARCHIVES<\/a><\/li>\n<li><a href=\"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/ice-ages-and-landscapes\/\">ICE AGES AND LANDSCAPES<\/a><\/li>\n<\/ul>\n[\/vc_column_text][\/toggle][\/toggles][toggles style=&#8221;default&#8221; border_radius=&#8221;none&#8221;][toggle color=&#8221;Default&#8221; heading_tag=&#8221;default&#8221; heading_tag_functionality=&#8221;default&#8221; title=&#8221;OCEAN AND MARINE LIFE&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<ul>\n<li><a href=\"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/the-arctic-ocean-and-the-ocean-currents\/\">THE ARCTIC OCEAN AND THE OCEAN CURRENTS<\/a><\/li>\n<li><a href=\"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/genesis-of-the-arctic-ocean\/\">GENESIS OF THE ARCTIC OCEAN<\/a><\/li>\n<li><a href=\"https:\/\/www.polarpod.fr\/en\/polar-encyclopedia\/arctic-plankton\/\">ARCTIC PLANKTON<\/a><\/li>\n<li>MARINE BIODIVERSITY AND FOOD WEB<\/li>\n<li>WHALES AND OTHER CETACEANS<\/li>\n<li>SEALS AND WALRUSES<\/li>\n<\/ul>\n[\/vc_column_text][\/toggle][\/toggles][toggles style=&#8221;default&#8221; border_radius=&#8221;none&#8221;][toggle color=&#8221;Default&#8221; heading_tag=&#8221;default&#8221; heading_tag_functionality=&#8221;default&#8221; title=&#8221;TERRESTRIAL LIFE&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<ul>\n<li>POLAR FLORA<\/li>\n<li>POLAR FAUNA<\/li>\n<li>THE POLAR BEAR<\/li>\n<li>ARCTIC BIRDS<\/li>\n<li>SPECIES EVOLUTION AND CLIMATE<\/li>\n<\/ul>\n[\/vc_column_text][\/toggle][\/toggles][toggles style=&#8221;default&#8221; border_radius=&#8221;none&#8221;][toggle color=&#8221;Default&#8221; heading_tag=&#8221;default&#8221; heading_tag_functionality=&#8221;default&#8221; title=&#8221;HISTORY AND GEOGRAPHY&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<ul>\n<li>GEOGRAPHY OF THE ARCTIC REGIONS<\/li>\n<li>GEOGRAPHIC NORTH POLE, MAGNETIC NORTH POLE<\/li>\n<li>WHO OWNS THE ARCTIC?<\/li>\n<li>THE EXPLORERS OF THE FAR NORTH<\/li>\n<li>THE INUIT<\/li>\n<li>OTHER PEOPLES OF THE FAR NORTH<\/li>\n<li>THE ARCTIC TODAY<\/li>\n<\/ul>\n[\/vc_column_text][\/toggle][\/toggles][toggles style=&#8221;default&#8221; border_radius=&#8221;none&#8221;][toggle color=&#8221;Default&#8221; heading_tag=&#8221;default&#8221; heading_tag_functionality=&#8221;default&#8221; title=&#8221;HUMAN IMPACT&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<ul>\n<li><a class=\"\" href=\"https:\/\/www.polarpod.fr\/fr\/encyclopedie\/arctique\/7-impact-de-l-homme\/1-l-homme-et-la-biodiversite-arctique\">HUMANS AND ARCTIC BIODIVERSITY<\/a><\/li>\n<li><a class=\"\" href=\"https:\/\/www.polarpod.fr\/fr\/encyclopedie\/arctique\/7-impact-de-l-homme\/2-pollutions-en-arctique\">POLLUTION IN THE ARCTIC<\/a><\/li>\n<li><a class=\"\" href=\"https:\/\/www.polarpod.fr\/fr\/encyclopedie\/arctique\/7-impact-de-l-homme\/3-rechauffement-les-cycles-naturels\">WARMING: NATURAL CYCLES<\/a><\/li>\n<li><a class=\"\" href=\"https:\/\/www.polarpod.fr\/fr\/encyclopedie\/arctique\/7-impact-de-l-homme\/4-l-augmentation-de-l-effet-de-serre\">THE INCREASE IN THE GREENHOUSE EFFECT<\/a><\/li>\n<li><a class=\"\" href=\"https:\/\/www.polarpod.fr\/fr\/encyclopedie\/arctique\/7-impact-de-l-homme\/5-les-consequences-du-rechauffement\">THE CONSEQUENCES OF WARMING<\/a><\/li>\n<\/ul>\n[\/vc_column_text][\/toggle][\/toggles][\/vc_column][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;3\/4&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_row_inner equal_height=&#8221;yes&#8221; column_margin=&#8221;custom&#8221; column_margin_custom=&#8221;2px&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bottom_padding=&#8221;2%&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;5\/6&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<h2><span style=\"color: #ff6b1a;\">ARCTIC PLANKTON<\/span><\/h2>\n[\/vc_column_text][\/vc_column_inner][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/6&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; column_padding_type=&#8221;default&#8221; gradient_type=&#8221;default&#8221;][nectar_icon icon_family=&#8221;linea&#8221; icon_style=&#8221;shadow-bg&#8221; icon_color_type=&#8221;color_scheme&#8221; icon_color=&#8221;Accent-Color&#8221; open_new_tab=&#8221;true&#8221; icon_padding=&#8221;5px&#8221; pointer_events=&#8221;all&#8221; url=&#8221;https:\/\/www.polarpod.fr\/wp-content\/uploads\/2025\/11\/PLANCTON_ARCTIQUE_FR.pdf&#8221; icon_size=&#8221;40&#8243; icon_linea=&#8221;icon-basic-printer&#8221;][\/vc_column_inner][\/vc_row_inner][vc_row_inner equal_height=&#8221;yes&#8221; column_margin=&#8221;custom&#8221; column_margin_custom=&#8221;2px&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bottom_padding=&#8221;2%&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<div id=\"l-homme-un-animal-a-37-c\" class=\"grid pt-header flex-align-center\">\n<h3 class=\"col-m-8\"><span style=\"color: #ff6b1a;\">ARCTIC PLANKTON<\/span><\/h3>\n<div class=\"col-m-8\">\n<div id=\"assistance-et-secours\" class=\"pt-header\">\n<div id=\"comme-une-echarpe-dans-le-vent-la-magnetosphere\" class=\"grid flex-row-reverse pt-header flex-align-center\">\n<div class=\"col-m-8\">\n<div id=\"un-ocean-cache-sous-la-banquise\" class=\"pt-header\">\n<div id=\"le-plancton-un-monde-minuscule-insoupconne\" class=\"pt-header\">\n<p>The term plankton is used to describe a group of organisms that live in water and are carried along by ocean currents without the means to swim against them. Plankton can be flora (phytoplankton, made up on uni-cellular algae) or fauna (zooplankton: eggs, larvae, small animals, gelatinous creatures, etc.).<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner equal_height=&#8221;yes&#8221; column_margin=&#8221;custom&#8221; column_margin_custom=&#8221;2px&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bottom_padding=&#8221;2%&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; column_padding_type=&#8221;default&#8221; gradient_type=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-7606\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2025\/11\/20_sch_01-136x300.gif\" alt=\"\" width=\"136\" height=\"300\" \/>[\/vc_column_text][\/vc_column_inner][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;2\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<div id=\"l-homme-un-animal-a-37-c\" class=\"grid pt-header flex-align-center\">\n<h3 class=\"col-m-8\"><span style=\"color: #ff6b1a;\">PHYTOPLANKTON: THE FIRST STAGE IN MARINE LIFE <\/span><\/h3>\n<div class=\"col-m-8\">\n<div id=\"assistance-et-secours\" class=\"pt-header\">\n<div id=\"comme-une-echarpe-dans-le-vent-la-magnetosphere\" class=\"grid flex-row-reverse pt-header flex-align-center\">\n<div class=\"col-m-8\">\n<div class=\"col-m-8\">\n<div class=\"col-m-8\">\n<div>\n<p>The algae component of plankton grows in the surface water, down to a depth of a few dozen metres, where the sunlight is still strong enough to allow photosynthesis to take place. Like land-based plants, phytoplankton needs both mineral elements and sunlight to be able to grow. There are thousands of different species of planktonic algae, all of them microscopic. They comprise the lowest link in the marine food chain.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner equal_height=&#8221;yes&#8221; column_margin=&#8221;custom&#8221; column_margin_custom=&#8221;2px&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bottom_padding=&#8221;2%&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;2\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; column_padding_type=&#8221;default&#8221; gradient_type=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<div id=\"l-homme-un-animal-a-37-c\" class=\"grid pt-header flex-align-center\">\n<h3 class=\"col-m-8\"><span style=\"color: #ff6b1a;\">ZOOPLANKTON<\/span><\/h3>\n<div class=\"col-m-8\">\n<div id=\"assistance-et-secours\" class=\"pt-header\">\n<div id=\"comme-une-echarpe-dans-le-vent-la-magnetosphere\" class=\"grid flex-row-reverse pt-header flex-align-center\">\n<div class=\"col-m-8\">\n<div class=\"col-m-8\">\n<div class=\"col-m-8\">\n<div>\n<p>Zooplankton includes representative of most groups of marine fauna, from unicellular animals to jellyfish with \u201cumbrellas\u201d more than 2 metres across. But the stars of the zooplankton world are crustaceans: minute copepods that are among the most numerous creatures on Earth. And of course the \u201cphony prawns\u201d more properly called polar krill.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column_inner][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-7607\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2025\/11\/20_sch_02-300x200.gif\" alt=\"\" width=\"300\" height=\"200\" \/>[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner equal_height=&#8221;yes&#8221; column_margin=&#8221;custom&#8221; column_margin_custom=&#8221;2px&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bottom_padding=&#8221;2%&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; column_padding_type=&#8221;default&#8221; gradient_type=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-7608\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2025\/11\/20_sch_03-300x250.gif\" alt=\"\" width=\"300\" height=\"250\" \/>[\/vc_column_text][\/vc_column_inner][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;2\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<div id=\"l-homme-un-animal-a-37-c\" class=\"grid pt-header flex-align-center\">\n<h3 class=\"col-m-8\"><span style=\"color: #ff6b1a;\">PLANKTONIC LIFE IN THE ARCTIC OCEAN<\/span><\/h3>\n<div class=\"col-m-8\">\n<div id=\"assistance-et-secours\" class=\"pt-header\">\n<div id=\"comme-une-echarpe-dans-le-vent-la-magnetosphere\" class=\"grid flex-row-reverse pt-header flex-align-center\">\n<div class=\"col-m-8\">\n<div class=\"col-m-8\">\n<div class=\"col-m-8\">\n<div>\n<p>During the polar night, planktonic algae stop growing for lack of light. When the thaw begins, the nutritious elements in the water are enriched by the addition of seawater and various organisms that were trapped in the sea ice, and by input brought by the currents and coastal run-off. When the sun returns, marine life reawakens and the food chain starts to function once more. By the time summer arrives, microalgae are even growing underneath and inside the sea ice.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner equal_height=&#8221;yes&#8221; column_margin=&#8221;custom&#8221; column_margin_custom=&#8221;2px&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bottom_padding=&#8221;2%&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;2\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; column_padding_type=&#8221;default&#8221; gradient_type=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<div id=\"l-homme-un-animal-a-37-c\" class=\"grid pt-header flex-align-center\">\n<h3 class=\"col-m-8\"><span style=\"color: #ff6b1a;\">PHYTOPLANKTON FLOWERING<\/span><\/h3>\n<div class=\"col-m-8\">\n<div id=\"assistance-et-secours\" class=\"pt-header\">\n<div id=\"comme-une-echarpe-dans-le-vent-la-magnetosphere\" class=\"grid flex-row-reverse pt-header flex-align-center\">\n<div class=\"col-m-8\">\n<div class=\"col-m-8\">\n<div class=\"col-m-8\">\n<div class=\"col-m-8\">\n<div>\n<p>The growth of marine plants is never limited by a lack of CO2 or water. But if they are to build up their living matter they also need light and nutriments \u2013 nutritious elements such as phosphates, nitrates, oligo-elements, etc. Unfortunately, the only zone where there is enough light is the surface layer, even though there is nutriment much further down. Nutriment is not just found in coastal waters that are fertilized by input from run-off and rivers, there is also an abundant supply of food in deeper waters because organic matter falls from the surface layers to be recycled by bacteria.<br \/>\nOcean zones where phytoplankton (diatoms, flagellates, etc.) will proliferate are usually the zones where the nutriments are found close to the surface where light can penetrate (shallow waters or else deep waters where upwellings bring the nutriments to the surface).<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column_inner][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-7609\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2025\/11\/20_sch_04-300x222.gif\" alt=\"\" width=\"300\" height=\"222\" \/>[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner equal_height=&#8221;yes&#8221; column_margin=&#8221;custom&#8221; column_margin_custom=&#8221;2px&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bottom_padding=&#8221;2%&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; column_padding_type=&#8221;default&#8221; gradient_type=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<div class=\"col-m-8\">\n<div id=\"assistance-et-secours\" class=\"pt-header\">\n<div id=\"qu-y-a-t-il-dans-l-atmosphere\" class=\"pt-header\">\n<h3 id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\">PRIMARY PRODUCTION IN THE OCEANS<\/span><\/h3>\n<div id=\"meme-depuis-le-ciel\" class=\"pt-header\">\n<div id=\"le-grand-ballet-de-la-derive-arctique\" class=\"pt-header\">\n<div id=\"glaciers-polaires-sous-surveillance\" class=\"pt-header\">\n<div id=\"le-bassin-boreal-3-masses-d-eau-superposees\" class=\"pt-header\">\n<div id=\"la-production-primaire-des-oceans\" class=\"pt-header\">\n<p>Oceanographers estimate the amount of vegetal plankton (biomass) present at any given moment in an oceanic region by measuring the chlorophyll content of the seawater. The amount of vegetal biomass in the ocean, almost totally made up of microscopic algae, is a thousand times less than terrestrial biomass. On the other hand, phytoplankton multiplies very rapidly: just one diatom, with two cellular divisions every 24 hours, can generate a million descendants over a period of 10 days. Just compare this to a tree in a forest, which can sometimes take 100 years to reach maturity\u2026 Because of the rate at which planktonic algae multiply, primary production in the world\u2019s oceans \u2013 calculated by measuring the carbon 14 absorbed by photosynthesis \u2013 can be similar to terrestrial biomass production: a hectare of ocean produces anything from 200 kg to nearly 2 metric tons of carbon each year, depending on the region, while a field of corn (maize) produces 2 metric tons of carbon per year.<\/p>\n<\/div>\n<h3 id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\">SATELLITE OBSERVATION<\/span><\/h3>\n<div id=\"sous-l-oeil-des-satellites\" class=\"pt-header\">\n<p>There are still a lot of gaps in scientific knowledge of the productivity of the oceans; certain zones have still to be explored and we still do not fully understand the growth processes involved (deficiencies, water agitation, etc.).<br \/>\nSatellite monitoring, which provides data on wind strength, current speeds, sea conditions (roughness\u2026), water temperature, chlorophyll content, etc.) is an invaluable aid to gaining a better understanding of oceanic plankton \u201cflowerings\u201d.<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3 id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\">KINGS OF THE ZOOPLANKTON WORLD: CRUSTACEAN COPEPODS<\/span><\/h3>\n<div id=\"meme-depuis-le-ciel\" class=\"pt-header\">\n<div id=\"le-grand-ballet-de-la-derive-arctique\" class=\"pt-header\">\n<div id=\"glaciers-polaires-sous-surveillance\" class=\"pt-header\">\n<div id=\"le-bassin-boreal-3-masses-d-eau-superposees\" class=\"pt-header\">\n<div id=\"des-crustaces-rois-du-zooplancton-les-copepodes\" class=\"pt-header\">\n<p>It is estimated that every litre of seawater contains between 1 and 10 copepods. These minute crustaceans have a body like a grain of rice, legs shaped like oars, sometimes a fairly well developed eye (more like a telescope that a human eye) and outsize feelers.<br \/>\nThere are about 2,000 species of planktonic copepods, ranging in size from less than a millimetre to several centimetres, depending on the species. They can be blue or red, colourless or luminescent, benthic or pelagic, polar or tropical. As they are so important to ocean life, they are the focus of numerous biological studies: species identification, studies of stomach content, estimation of daily food intake, determination of growth factors, oxygen consumption, fertility, etc.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner equal_height=&#8221;yes&#8221; column_margin=&#8221;custom&#8221; column_margin_custom=&#8221;2px&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bottom_padding=&#8221;2%&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; column_padding_type=&#8221;default&#8221; gradient_type=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<div class=\"col-m-8\">\n<div id=\"assistance-et-secours\" class=\"pt-header\">\n<div id=\"qu-y-a-t-il-dans-l-atmosphere\" class=\"pt-header\">\n<h3 id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\"><span style=\"caret-color: #ff6b1a;\">KRILL, OR \u201cPHONY PRAWNS\u201d<\/span><\/span><\/h3>\n<div id=\"meme-depuis-le-ciel\" class=\"pt-header\">\n<div id=\"le-grand-ballet-de-la-derive-arctique\" class=\"pt-header\">\n<div id=\"etudier-la-banquise\" class=\"pt-header\">\n<div id=\"icebergs-des-montagnes-de-glace-a-la-derive\" class=\"pt-header\">\n<div id=\"l-ocean-arctique-encore-bien-des-mysteres\" class=\"pt-header\">\n<div id=\"de-fausses-crevettes\" class=\"pt-header\">\n<p>Krill is the Norwegian word used to describe large concentrations of euphasia, small crustaceans that look rather like prawns (and were for a long time classed as prawns) but that retain numerous characteristics of primitive crustaceans. World krill stocks have been estimated at some 500 million metric tons. Krill are not planktonic, in the strict sense of the word, because they can swim. They move along at 0.5 kph in a school and even faster than 2 kph on their own. Because of this, some specialists classify them as macroplankton while others regard them as microplankton (from the Greek nektos, creatures that swim like fish and cephalopods, etc). In addition, krill migrate vertically within the top 100 metres of the water column, sometimes going even lower in search of nutriments that they filter from the water using a very fine comb-like organ.<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<h3 id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\"><span style=\"caret-color: #ff6b1a;\">BIO-POVERTY OF THE CENTRAL ARCTIC OCEAN<\/span><\/span><\/h3>\n<div id=\"pauvrete-de-l-ocean-arctique-central\" class=\"pt-header\">\n<p>In the central part of the Polar Basin, production of phytoplankton is very low: less than 100 mgC\/m2\/day. Production in the surrounding strip (the continental shelf) is not much higher, at 150 mgC\/m2\/day. The zones that open onto the Atlantic and the Pacific (Scandinavian Basin, Baffin and Labrador Seas, vicinity of Bering and the Aleutians) are much richer (200-500 mgC\/m2\/day) and the coastal waters produce more than 500 mgC\/m2\/day.<br \/>\nHowever, it should be borne in mind that these are average values that mask local, seasonal and even annual variations. Nevertheless, the central part of the Polar Basin is always one of the poorer zones.<br \/>\nBy comparison, primary production in the Western Mediterranean is 100 mgC\/m2\/day (\u00e7a devrait \u00eatre 1,000?) and 10,000 mgC\/m2\/day in the exceptionally rich strip along the coast of Peru.<\/p>\n<\/div>\n<div id=\"la-vie-du-plancton-arctique-en-ete\" class=\"pt-header\">\n<h3><\/h3>\n<h3 id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\"><span style=\"caret-color: #ff6b1a;\">THE LIFE OF ARCTIC PLANKTON IN SUMMER<\/span><\/span><\/h3>\n<p>Biologists have put forward several hypotheses to explain the life of Arctic plankton.<br \/>\nIn spring, the melting ice produces a desalinated and stable layer of water on the surface of an ocean rich in nutritious salts. This phenomenon allows micro-algae to start to multiply. The growth and recycling as waste of certain species subsisting in the ice underneath the pack provides some of the \u201cingredients\u201d needed for this.<br \/>\nIn the Barents and Norwegian Seas, the life cycle of the first \u201cgeneration\u201d or wave of the dominant copepod species (Calanus finmarchicus and C. glacialis) shows that the beginning and end of hibernation (more properly diapause in deep water) of the copepods, the growth of their genital organs and the moment of egg-laying seem to be determined by the need for the first (herbivorous) stages of the life cycle to be synchronised with the growth of surface phytoplankton in the surface layer.<br \/>\nIn the Greenland Sea, the water coming out of the Arctic Ocean contains little zooplankton. In this zone, only the waters mixed with Atlantic water, carrying copepods and probably other species (microphagous species such as salp) can introduce herbivorous grazers. So phytoplankton is very abundant there.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner equal_height=&#8221;yes&#8221; column_margin=&#8221;custom&#8221; column_margin_custom=&#8221;2px&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bottom_padding=&#8221;2%&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; column_padding_type=&#8221;default&#8221; gradient_type=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<div class=\"col-m-8\">\n<div id=\"assistance-et-secours\" class=\"pt-header\">\n<div id=\"qu-y-a-t-il-dans-l-atmosphere\" class=\"pt-header\">\n<h3 id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\">WHAT HAPPENS IN WINTER ?<\/span><\/h3>\n<div id=\"meme-depuis-le-ciel\" class=\"pt-header\">\n<div id=\"le-grand-ballet-de-la-derive-arctique\" class=\"pt-header\">\n<div id=\"etudier-la-banquise\" class=\"pt-header\">\n<div id=\"naviguer-dans-la-banquise\" class=\"pt-header\">\n<div id=\"les-glaciers-arctiques-fondent-ils\" class=\"pt-header\">\n<div id=\"les-scientifiques-dressent-des-cartes-de-marees\" class=\"pt-header\">\n<div id=\"que-se-passe-t-il-en-hiver\" class=\"pt-header\">\n<p>Scientists shave little information about the distribution, evolution and impact of plankton on the overall balance of matter (and CO2 in particular) during the Arctic winter. The hypothesis most often put forward is that the absence of light inhibits the mechanisms that govern the production of organic matter. In that case the biological absorption of CO2 by photosynthesis \u2013 on the part of autotrophic planktonic algae \u2013 is zero. On the other hand, the production of CO2 via the breathing of heterotrophic organisms (zooplankton) continues.Furthermore, the conditions in winter certainly have a decisive impact on the biological cycle of numerous planktonic species, and consequently on the build-up of a stock of nourishment for the larvae of several species of fish. Certain copepods in particular go through hibernation stages at great depth during which they are passively carried along by the currents. These animals would not be able to produce a new generation during the spring unless the individuals were transported towards zones where they is high production of spring phytoplankton \u2013 zones where they could continue to grow or, if already adult, reproduce.<br \/>\nOther species survive and grow despite the extremely low temperatures.<br \/>\nThe results published after an expedition around the Svalbard Archipelago show that during the warm season most of the zoological groups that play a part in the production or destruction of sedimentable particles are present there: crustaceans (copepods, amphipods, ostracods); molluscs (pteropods, chaetognaths, appendicularians, coelentrates, siphonophora and jellyfish).<\/p>\n<\/div>\n<div id=\"la-mer-du-groenland\" class=\"pt-header\">\n<h3><\/h3>\n<h3 id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\">THE GREENLAND SEA<\/span><\/h3>\n<p>To what extent is zooplankton \u201cinoculated\u201d by the currents in the Greenland Sea?<br \/>\nThe Arctic waters bring with them only small quantities of living organisms, but the branch of the North Atlantic Current that flows up the eastern side of the strait that provides an exit for polar waters brings zooplanktonic species. But which are the dominant groups that subsist there in winter? And what role does the zooplankton play in the overall balance of matter (particularly CO2) in the region?<br \/>\nFirstly phytoplankton. Seawater samples taken in February and May in a fjord on the western coast contain only flagellates (between 0.1 and 37 million cells per litre). It is only in April that scientists will observe diatoms and a marked surge in production of vegetal biomass. Strong growth of a flagellate species can trigger a sudden influx of vegetal matter towards the zooplankton. The concentrations of chlorophyll that have been measured correspond to annual primary production of 150 mg of carbon per m2 (between April and September), which is comparable to the Norwegian fjords.<br \/>\nHowever, it should be noted that there is a relatively low concentration of nutritious salts in the upper layer of the sea, roughly equivalent to the concentration in the deeper waters of the Mediterranean and 2 or 3 times less than the concentrations recorded across upwelling zones in inter-tropical coastal waters.<br \/>\nZooplankton, on the other hand, subsists in winter at depths between 300 and 400 metres.<br \/>\nThe most abundant species are probably copepods. Calanus hyperboreus is a \u201cresident\u201d species and the dominant one in the Greenland Sea, while Calanus finmarchus (finmarchicus plus haut) is imported by deep currents and its numbers diminish in autumn. The species reappears in April at depths of 200-300 metres and by June it occupies the surface water.<br \/>\nPteropods such as Limacia sp., which subsists at the end of the autumn, as well as the chaetognath Eukrohnia sp. also add to the overall biomass. Ostracods such as Boroecia borealis have also been observed during this period.<br \/>\nThe microbial network (bacteria, etc.) must also remain quite active, even during the winter, because scientists have observed one of the ten most abundant species of appendicularians, which indicates the existence of small-sized prey.<\/p>\n<\/div>\n<div id=\"la-vie-dans-la-banquise\" class=\"pt-header\">\n<h3><\/h3>\n<h3 id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\">LIFE IN AMONG THE SEA ICE<\/span><\/h3>\n<p>On occasions, the sea ice can turn brown and give off a marked odour due to the presence of a multitude of diatoms growing on the underside of the sea ice.<br \/>\nBut within the mass of ice itself, life forms subsist among the crystals of fresh-water ice and in the thin seawater channels. A complete food chain can be found here, including planktonic algae and their decomposers (bacteria). Some of these organisms spend their whole life cycle inside the sea ice and others only part of their cycle, but all of them have adapted to a wide range of salinity and sunlight strength. This means that even during the Arctic winter, some algae can continue to photosynthesise using the very weak light of the polar night.Some of these organisms originate in the sea and others are washed down to the sea by rivers. In autumn, when the sea starts to freeze over once more, they remain there, clinging to the ice. At first, both their diversity and the quantities present are quite low, but as soon as spring arrives numbers and diversity skyrocket, along with those of their predators. In sections of ice that have built up over several years, and thus several life cycles, the ice displays several strips or layers of microscopic communities that allow scientists to date successive spring \u201cflowerings\u201d.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner equal_height=&#8221;yes&#8221; column_margin=&#8221;custom&#8221; column_margin_custom=&#8221;2px&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bottom_padding=&#8221;2%&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; column_padding_type=&#8221;default&#8221; gradient_type=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<div class=\"col-m-8\">\n<div id=\"assistance-et-secours\" class=\"pt-header\">\n<div id=\"qu-y-a-t-il-dans-l-atmosphere\" class=\"pt-header\">\n<h3 id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\">BIOLOGIST\u2019S CORNER<\/span><\/h3>\n<div id=\"meme-depuis-le-ciel\" class=\"pt-header\">\n<div id=\"le-grand-ballet-de-la-derive-arctique\" class=\"pt-header\">\n<div id=\"etudier-la-banquise\" class=\"pt-header\">\n<div id=\"naviguer-dans-la-banquise\" class=\"pt-header\">\n<div id=\"si-les-glaces-fondaient\" class=\"pt-header\">\n<div id=\"le-coin-des-biologistes\" class=\"pt-header\">\n<p>&#8211; The CO2 in the atmosphere is partially dissolved in the ocean water, and the lower the water temperature, the more is dissolved. It is then transported by ocean currents. For example, CO2 absorbed in the Antarctic can \u201creappear\u201d in the tropical zone after being carried along by deep currents for several decades. The CO2 is also actively used by phytoplankton during its flowering or when it is building its shell (this is known as the \u201cbiological pump\u201d), but some of it is also released back into the atmosphere by the breathing process.<\/p>\n<p>&#8211; In the top 100 metres of the water column, between November and February, zooplankton biomass diminishes from 20 mg to 4 mg (dry weight) per m3. It is as late as June before the surface biomass reaches 60 mg per m3. In the Arctic Ocean as a whole, the biomass of the layer from 0 to 1,000 metres is quite low (0.2 mg per m3) compared to biomass in the Greenland and Norwegian Seas (12-13 mg per m3).<\/p>\n<p>&#8211; Marine animals able to adapt to widely diverging salinity levels have an advantage in regions where life follows the freeze-melt cycle of the sea ice. For example, during the month of June, when ice is melting, salt water can become fresh water in less than an hour, later stabilising at 32% a few days later.<\/p>\n<p>&#8211; Low temperatures restrict the number of species (although those that are present display a very large number of individuals) and slow the metabolism of living beings. In warm oceans, certain copepods can accomplish their full life cycle in just 15 days, but in polar regions some copepods can take nearly two years to reach sexual maturity.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner equal_height=&#8221;yes&#8221; column_margin=&#8221;custom&#8221; column_margin_custom=&#8221;2px&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bottom_padding=&#8221;2%&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; column_padding_type=&#8221;default&#8221; gradient_type=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-7610\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2025\/11\/chetognate-150x300.gif\" alt=\"\" width=\"150\" height=\"300\" \/>[\/vc_column_text][\/vc_column_inner][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;2\/3&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<h3 id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\"><span style=\"caret-color: #ff6b1a;\">SOME USEFUL VOCABULARY<\/span><\/span><\/h3>\n<p>Planktonic organisms can be classified :<\/p>\n<p>&#8211; By size<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-7621\" src=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2025\/11\/tableau_en.png\" alt=\"\" width=\"500\" height=\"374\" srcset=\"https:\/\/www.polarpod.fr\/wp-content\/uploads\/2025\/11\/tableau_en.png 808w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2025\/11\/tableau_en-300x224.png 300w, https:\/\/www.polarpod.fr\/wp-content\/uploads\/2025\/11\/tableau_en-768x574.png 768w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/>&#8211; By their position in the water column. Organisms on the surface are called epiplankton. This is where most of the better-known organisms live (copepods, small prawns, etc.). Organisms that live in the depths are known as bathyplankton. These are large transparent animals, filter-feeders like jellyfish, that can best adapt to the bio-poverty of this environment.<\/p>\n<p>By their adult form. When an organism spends only the larval phase of its life cycle floating in the water (e.g. the larvae of sea urchins, benthic fish, worms, etc.) they are called meroplankton.<br \/>\nThe other type is holoplankton, or animals that spend their whole life cycle in a planktonic state (foraminifera, radiolarians, copepods, chaetognaths, etc.).[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner equal_height=&#8221;yes&#8221; column_margin=&#8221;custom&#8221; column_margin_custom=&#8221;2px&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bottom_padding=&#8221;2%&#8221; text_align=&#8221;left&#8221; row_position=&#8221;default&#8221; row_position_tablet=&#8221;inherit&#8221; row_position_phone=&#8221;inherit&#8221; overflow=&#8221;visible&#8221; pointer_events=&#8221;all&#8221;][vc_column_inner column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; overflow=&#8221;visible&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221; column_padding_type=&#8221;default&#8221; gradient_type=&#8221;default&#8221;][vc_column_text css=&#8221;&#8221; text_direction=&#8221;default&#8221;]\n<h3 id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\"><span style=\"caret-color: #ff6b1a;\">TO FIND OUT MORE \u2026<\/span><\/span><\/h3>\n<p id=\"quel-temps-fera-t-il-demain\" class=\"pt-header\"><span style=\"color: #ff6b1a;\"><span style=\"caret-color: #ff6b1a;\">BIBLIOGRAPHIE<\/span><\/span><\/p>\n<ul>\n<li>L\u2019Arctique et l\u2019environnement bor\u00e9al, P. Av\u00e9rous \u2013 CNDP, 1995<\/li>\n<li>L\u2019Antarctique et l\u2019environnement polaire (2) \u201cEREBUS\u201d ,P. Av\u00e9rous \u2013 Dossier p\u00e9dagogique \u2013 CNDP-1992<\/li>\n<li>Chercheurs sur l\u2019Oc\u00e9an\u201d, P.Av\u00e9rous \u2013 Hachette -1981<\/li>\n<li>Les missions de l\u2019Antarctica : la travers\u00e9e de Pacifique -1994<\/li>\n<li>Arctic Flora and Fauna : status and conservation (CAFF, Conservations of Arctic Flora and Fauna, Helsinski Edita, 2001)<\/li>\n<\/ul>\n[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row][vc_row type=&#8221;in_container&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; scene_position=&#8221;center&#8221; text_color=&#8221;dark&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; overlay_strength=&#8221;0.3&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;none&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;all&#8221; column_element_direction_desktop=&#8221;default&#8221; column_element_spacing=&#8221;default&#8221; desktop_text_alignment=&#8221;default&#8221; tablet_text_alignment=&#8221;default&#8221; phone_text_alignment=&#8221;default&#8221; background_color_opacity=&#8221;1&#8243; background_hover_color_opacity=&#8221;1&#8243; column_backdrop_filter=&#8221;none&#8221; column_shadow=&#8221;none&#8221; column_border_radius=&#8221;none&#8221; column_link_target=&#8221;_self&#8221; column_position=&#8221;default&#8221; gradient_direction=&#8221;left_to_right&#8221; overlay_strength=&#8221;0.3&#8243; width=&#8221;1\/1&#8243; tablet_width_inherit=&#8221;default&#8221; animation_type=&#8221;default&#8221; bg_image_animation=&#8221;none&#8221; border_type=&#8221;simple&#8221; column_border_width=&#8221;none&#8221; column_border_style=&#8221;solid&#8221;][nectar_global_section id=&#8221;6550&#8243;][\/vc_column][\/vc_row]\n","protected":false},"excerpt":{"rendered":"<p>[vc_row type=&#8221;full_width_background&#8221; full_screen_row_position=&#8221;middle&#8221; column_margin=&#8221;default&#8221; column_direction=&#8221;default&#8221; column_direction_tablet=&#8221;default&#8221; column_direction_phone=&#8221;default&#8221; bg_color=&#8221;#454156&#8243; scene_position=&#8221;center&#8221; top_padding=&#8221;4%&#8221; bottom_padding=&#8221;0%&#8221; text_color=&#8221;light&#8221; text_align=&#8221;left&#8221; row_border_radius=&#8221;none&#8221; row_border_radius_applies=&#8221;bg&#8221; overflow=&#8221;visible&#8221; id=&#8221;intro&#8221; row_name=&#8221;Intro&#8221; color_overlay=&#8221;#0a0a0a&#8221; color_overlay_2=&#8221;#C02020&#8243; overlay_strength=&#8221;0.5&#8243; gradient_direction=&#8221;left_to_right&#8221; shape_divider_position=&#8221;bottom&#8221; bg_image_animation=&#8221;zoom-out-slow&#8221; gradient_type=&#8221;default&#8221; shape_type=&#8221;&#8221;][vc_column column_padding=&#8221;no-extra-padding&#8221; column_padding_tablet=&#8221;inherit&#8221; column_padding_phone=&#8221;inherit&#8221; column_padding_position=&#8221;top&#8221;&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":5466,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-7620","page","type-page","status-publish"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.polarpod.fr\/en\/wp-json\/wp\/v2\/pages\/7620","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.polarpod.fr\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.polarpod.fr\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.polarpod.fr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.polarpod.fr\/en\/wp-json\/wp\/v2\/comments?post=7620"}],"version-history":[{"count":3,"href":"https:\/\/www.polarpod.fr\/en\/wp-json\/wp\/v2\/pages\/7620\/revisions"}],"predecessor-version":[{"id":7630,"href":"https:\/\/www.polarpod.fr\/en\/wp-json\/wp\/v2\/pages\/7620\/revisions\/7630"}],"up":[{"embeddable":true,"href":"https:\/\/www.polarpod.fr\/en\/wp-json\/wp\/v2\/pages\/5466"}],"wp:attachment":[{"href":"https:\/\/www.polarpod.fr\/en\/wp-json\/wp\/v2\/media?parent=7620"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}