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They are multicellular, predominantly photosynthetic eukaryotes of the kingdom Plantae. Because of their unique cell structure, and the life cycle it’s easy to recognize them. Marine phytoplankton consist of the microscopic algae that live in suspension in the surface waters of oceans. Instrumented buoy (Photo : Emilie Diamond). Phytoplankton can range in size and shape, and since they are photosynthesizing autotrophic organisms, they inhabit waters exposed to sunlight. Question 1: What are phytoplankton organisms? Like terrestrial plants, phytoplankton organisms have the green pigment chlorophyll a, which is essential to photosynthesis. Nutrients are abundant in deep waters, from where they must be brought up to the surface by different physical mechanisms before being consumed by phytoplankton. phytoplankton lives near the surface so that enough sunlight can penetrate to power photosynthesis. This process is known as photosynthesis, and phytoplankton organisms are said to be "photo-autotrophic". Click on the image to start a quizz or game... Quizz phytoplankton Memory phytoplankton, Dinoflagellate Ceratium candelabrum var depressum (Photo : Sophie Marro), Deployment of a profiling float (Photo : Jean-Jacques Pangrazi). Phytoplankton, also known as microalgae, are microscopic biotic organisms that inhabit most bodies of water, including the oceans, lakes, rivers and ponds. On the opposite, animals are "heterotrophic". It is a huge producer for the food web. Like all green plants, phytoplankton has chlorophyll to capture sunlight, and they use photosynthesis to turn it into chemical energy. They belong either to the kingdom Protista. Emiliana huxleyi, a marine phytoplankton whose blooms can grow so large they are visible from space.The researchers found it does not require vitamin B1 to grow, as previously thought. Phytoplankton diversity is particularly high in the seas of the Indonesian-Australian archipelago, in parts of the Indian Ocean and in the equatorial Pacific Ocean. This is called the euphotic zone. Nutrients (nitrates, phosphates, silicates, etc.) Question 3: What is the significance of phytoplankton to humans? How do phytoplankton live? These organisms possess two flagella that enable them to move like animals. Yet these tiny cyanobacteria might be the most abundant organisms in the ocean! Phytoplankton are most abundant (yellow, high chlorophyll) in high latitudes and in upwelling zones along the equator and near coastlines. Diatoms are a major group of microalgae that is found in the oceans, waterways, and soils of the world. Sunlight and nutrients What is photosynthesis and what does it have to do with plankton? Oceans Alive contains two strains, carefully selected to find the best match for the human nutritional profile. MIT researchers have found that increasing ocean acidification will impact phytoplankton species worldwide, reports Michelle Toh for The Christian Science Monitor. These small plants are considered very important for the ocean and to the earth as they are a very basic and crucial factor of the food chain. Phytoplankton is tiny photosynthetic organisms and foundation of the aquatic food web. Through photosynthesis, phytoplankton produce large amounts of oxygen (O2), which dissolves in seawater. Préparation des mésocosmes sur le ponton du laboratoire d'Océanographie de Villefranche lors de l'expérience menée en rade de Villefranche en février 2013 (© L. Maugendre, LOV), Dinoflagellate Ceratium azoricum (Photo : Sophie Marro), Dinoflagellate Ceratium teresgyr (Photo : Sophie Marro), Diatom genus Hemiaulus (Photo : Sophie Marro). These organisms possess flagella and, more importantly, they are covered with microscopic plates made of limestone (calcite). There are more than 43,000 known and identified strains in existence and an estimated 200,000 or more in total. Sea Urchin - Planktonic OriginsBarely visible to the naked eye, sea urchin larvae grow and transform into bottom-dwelling urchins. These organisms are also named blue-green algae. All of them contribute to the photosynthesis in the ocean. Carbon dioxide is plentiful in the ocean and whenever the supply in the surface waters goes down because the phytoplankton have used it during photsynthesis. Marine algae (seaweeds and phytoplankton) are a loose group of some of the simplest organisms that contain chlorophyll (like plants) but include members of both the Empires Prokaryota(Kingdom Bacteria – e.g., cyanobacteria) and Eukaryota (Kingdoms Chromista, Plantae and Protozoa…). They use the organic matter of other organisms to make their own organic matter. When coccolithophores die, they shed their small calcite plates, which sink into the deep ocean when incorporated into heavier particles. They include numerous groups that are characterized by a variety of shapes and sizes, and play different roles in marine ecosystems. Phytoplankton is microscopic plants that live in the ocean, seas or lakes. Because they are so small, some species have been discovered lately, in the 1980s. They are most commonly found floating on the surface of water, as these organisms need sunlight in order to produce nutrients. "They're at the very bottom of the food chain, and what happens at the bottom impacts everybody." Researchers use these characteristics to identify species. Although, they are the major producers of marine life, sometimes called the grasses of the sea. All organisms commonly known as green algae, land plants, including liverworts, mosses, ferns, and other non-seed plants, and seed plants are classified and consider in the category of green plants. The large fishes feed on small fishes and then humans consume those big fishes. Some of them produce toxins that can accumulate in shellfish, resulting in poisoning when eaten.

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2020-12-02T15:12:41+00:00

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