Diatoms Dominate and Alter Marine Food-Webs When CO2 Rises

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Fishing through marine food webs.

A recurring pattern of declining mean trophic level of fisheries landings, termed "fishing down the food web," is thought to be indicative of the serial replacement of high-trophic-level fisheries with less valuable, low-trophic-level fisheries as the former become depleted to economic extinction. An alternative to this view, that declining mean trophic levels indicate the serial addition of lo...

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Marine Plankton Food Webs and Climate Change

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Fishing down Marine Food Webs: an Update

One of the major ecosystem impacts offishing is the selective extirpation oflarge, long-lived fishes and their replacement in the ecosystem and in fisheries catches by small, short-lived fishes and invertebrates. As large fish tend to be top-predators, feeding on smaller' fishes while smaller fish and invertebrates feed on plankton and/or detritus, this process, recently shown to be operating g...

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Commentary: Fishing Down Marine Food Webs

Most readers not already committed to the arcane practices of fish 'stock assessment' (the applied part of fisheries science) will probably assume that the subject matter covered by Ware is central to fisheries management. Strangely, this is not so: stock assessments are usually performed on the basis of trends in the catches of single species, and other fisheries-derived data, without referenc...

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ژورنال

عنوان ژورنال: Diversity

سال: 2019

ISSN: 1424-2818

DOI: 10.3390/d11120242