Concept information
Terme préférentiel
zooplankton
Définition
- Zooplankton are the animal (or heterotrophic) component of the planktonic community, having to consume other organisms to thrive. Plankton are aquatic organisms that are unable to swim effectively against currents. Consequently, they drift or are carried along by currents in the ocean, or by currents in seas, lakes or rivers. Zooplankton can be contrasted with phytoplankton, which are the plant (or autotrophic) component of the plankton community. Zooplankton are heterotrophic (other-feeding), whereas phytoplankton are autotrophic (self-feeding), often generating energy through photosynthesis. In other words, zooplankton cannot manufacture their own food. Rather, they must eat other organisms instead. In particular, they eat phytoplankton, which are generally smaller than zooplankton. Most zooplankton are microscopic but some (such as jellyfish) are macroscopic, meaning they can be seen with the naked eye. In addition to linking primary producers to higher trophic levels in marine food webs, zooplankton also play an important role as “recyclers” of carbon and other nutrients that significantly impact marine biogeochemical cycles, including the biological pump. This is particularly important in the oligotrophic waters of the open ocean. Through sloppy feeding, excretion, egestion, and leaching of fecal pellets, zooplankton release dissolved organic matter (DOM) which controls DOM cycling and supports the microbial loop. Absorption efficiency, respiration, and prey size all further complicate how zooplankton are able to transform and deliver carbon to the deep ocean. (Adapted from: https://en.wikipedia.org/wiki/Zooplankton)
Concept générique
Concepts spécifiques
Traductions
-
français
URI
http://data.loterre.fr/ark:/67375/QX8-GTS0NZ9N-P
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