Phytoplankton refers to the autotrophic component of the plankton that drifts in the water column.
Most phytoplankton are too small to be individually seen with the unaided eye.
Phytoplankton, like plants, obtain energy through a process called photosynthesis, and so must live in the well-lit surface layer of an ocean, sea, or lake.
Through photosynthesis, phytoplankton (and terrestrial plants) are responsible for much of the oxygen present in the Earth's atmosphere.
Their cumulative energy fixation in carbon compounds (primary production) is the basis for the vast majority of oceanic and some freshwater food chains.
Food chain Food chains and food webs and/or food networks describe the feeding relationships between species in a biotic community. In other words, they show ... >
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Plankton Plankton are drifting organisms that inhabit the water column of oceans, seas, and bodies of fresh water. Plankton abundance and distribution are ... >
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Trophic level In ecology, the trophic level is the position that an organism occupies in a food chain - what it eats, and what eats it. Wildlife biologists look at ... >
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Carbon cycle The carbon cycle is the biogeochemical cycle by which carbon is exchanged between the biosphere, geosphere, hydrosphere and atmosphere of the Earth. ... >
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Algal bloom An algal bloom or marine bloom or water bloom is a rapid increase in the population of algae in an aquatic system. Algal blooms may occur in ... >
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Red tide "Red Tide" is a common name for a phenomenon known as an algal bloom, an event in which estuarine, marine, or fresh water algae accumulate rapidly in ... >
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Dead zone (ecology) Dead zones are hypoxic (low-oxygen) areas in the world's oceans, the observed incidences of which have been increasing since oceanographers began ... >
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Marine biology Marine biology is the scientific study of the plants, animals, and other organisms that live in the ocean. Given that in biology many phyla, families ... >
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Ocean acidification Ocean acidification is the name given to the ongoing decrease in the pH of the Earth's oceans, caused by their uptake of anthropogenic carbon dioxide ... >
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