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Krill also release faecal pellets (3) whilst they feed, which can sink to the deep sea but can be consumed (coprophagy) and degraded as they descend (4) by krill, bacteria and zooplankton. In the marginal ice zone, faecal pellet flux can reach greater depths (5). Krill also release moults, which sink and contribute to the carbon flux (6).
This is an accepted version of this page This is the latest accepted revision, reviewed on 5 February 2025. Organisms living in water or air that are drifters on the current or wind This article is about the marine organisms. For other uses, see Plankton (disambiguation). Marine microplankton and mesoplankton Part of the contents of one dip of a hand net. The image contains diverse planktonic ...
These are plankton. ... Most of these are considered macroplankton due to their size (from ¾ of an inch to 8 inches). ... Some of the largest plankton are krill and feed the largest of animals ...
Body size has been defined as a "master trait" for plankton as it is a morphological characteristic shared by organisms across taxonomy that characterises the functions performed by organisms in ecosystems. [9] [10] It has a paramount effect on growth, reproduction, feeding strategies and mortality. [11]
Plankton can be divided into producers and consumers. The producers are the phytoplankton (Greek phyton = plant) and the consumers, who eat the phytoplankton, are the zooplankton (Greek zoon = animal). Jellyfish are slow swimmers, and most species form part of the plankton. Traditionally, jellyfish have been viewed as trophic dead ends.
Krill constitute the next biggest source of protein. Krill are particularly large predator zooplankton which feed on smaller zooplankton. This means they really belong to the third trophic level, secondary consumers, along with the forage fish. Together, phytoplankton and zooplankton make up most of the plankton in the sea.
Antarctic krill can scrape off the green lawn of ice algae from the underside of pack ice. [13] [14] Krill have developed special rows of rake-like setae at the tips of their thoracopods, and graze the ice in a zig-zag fashion. One krill can clear an area of a square foot in about 10 minutes (1.5 cm 2 /s). Recent discoveries have found that the ...
Size and classification of marine ... Krill, copepods ... Salps are large gelatinous plankton that can vertically migrate 800 metres and eat large amounts of food at ...