Facts about Role of Krill in Marine Ecosystems
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Estimates suggest Antarctic krill biomass totals around 379 million tonnes, making Euphausia superba one of the most abundant animal species on Earth.
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Vertical migration by krill, descending to deeper waters during the day and rising at night, helps structure the physical and biological dynamics of ocean layers.
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Grazing krill play a crucial role in nutrient cycling by consuming phytoplankton and releasing nitrogen and phosphorus compounds that fertilize ocean surface waters.
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The lipid-rich bodies of krill make them a critical energy source, transferring enormous quantities of stored fat up the marine food chain.
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Dense krill swarms can be detected by sonar and are visible from satellites, sometimes covering hundreds of square kilometers of ocean surface.
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Krill excrete carbon-rich fecal pellets that sink rapidly, making them a significant contributor to the biological carbon pump in ocean ecosystems.
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Antarctic krill form the foundation of the Southern Ocean food web, serving as the primary prey for whales, seals, penguins, and seabirds.