Trophic Cascades in Marine and Freshwater Plankton

Sommer, Ulrich (2008) Trophic Cascades in Marine and Freshwater Plankton International Review of Hydrobiology, 93 (4-5). pp. 506-516. DOI 10.1002/iroh.200711039.

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Transmission of top-down control from fish to phytoplankton via crustacean mesozooplankton is a cornerstone of limnetic plankton ecology. Such trophic cascades are less frequently reported from the marine pelagic. In this article a case is made for consideration of scale issues and for the distinction between full (affecting entire trophic levels) and partial (affecting only some functional groups) trophic cascades. Partial cascades are more widespread while the full cascades are either ephemeral or depend on the suppression of compensatory growth of the predation-resistant size-fractions of phytoplankton. This suppression can only be achieved if there is a persistent coexistence between zooplankton feeding on different parts of the phytoplankton size spectrum. This condition is fulfilled in plankton communities where microphageous cladocerans (mainly Daphnia) and microphageous copepods coexist (many lake communities) or where krill and copepods coexist (high latitude marine communities). It is not fulfilled in many temperate and low-latitude marine communities where copepods effectively suppress filter-feeding appendicularians. Thus, the observed difference in the frequency of marine and limnetic pelagic cascades is considered real.

Are all trophic cascades wet?

Document Type: Article
Keywords: top-down control; plankton; cladocerans; copepods
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EOE-N Experimental Ecology - Food Webs
Refereed: Yes
DOI etc.: 10.1002/iroh.200711039
ISSN: 1434-2944
Date Deposited: 03 Dec 2008 16:52
Last Modified: 31 May 2017 07:45

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