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Eutrophication, Fisheries, and Consumer-Resource Dynamics in Marine Pelagic Ecosystems
New Series, Vol. 285, No. 5432 (Aug. 27, 1999), pp. 1396-1398
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/2898787
Page Count: 3
You can always find the topics here!Topics: Marine ecosystems, Phytoplankton, Marine fishes, Nutrients, Biomass, Food webs, Plankton, Trophic levels, Seas, Herbivores
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Anthropogenic nutrient enrichment and fishing influence marine ecosystems worldwide by altering resource availability and food-web structure. Meta-analyses of 47 marine mesocosm experiments manipulating nutrients and consumers, and of time series data of nutrients, plankton, and fishes from 20 natural marine systems, revealed that nutrients generally enhance phytoplankton biomass and carnivores depress herbivore biomass. However, resource and consumer effects attenuate through marine pelagic food webs, resulting in a weak coupling between phytoplankton and herbivores. Despite substantial physical and biological variability in marine pelagic ecosystems, alterations of resource availability and consumers result in general patterns of community change.
Science © 1999 American Association for the Advancement of Science