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Aquatic Food WebsAn ecosystem approach$
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Andrea Belgrano, Ursula M. Scharler, Jennifer Dunne, and Robert E. Ulanowicz

Print publication date: 2005

Print ISBN-13: 9780198564836

Published to Oxford Scholarship Online: September 2007

DOI: 10.1093/acprof:oso/9780198564836.001.0001

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Climate forcing, food web structure, and community dynamics in pelagic marine ecosystems

Climate forcing, food web structure, and community dynamics in pelagic marine ecosystems

(p.143) CHAPTER 12 Climate forcing, food web structure, and community dynamics in pelagic marine ecosystems
Aquatic Food Webs

L. Ciannelli

D. Ø. Hjermann

P. Lehodey

G. Ottersen

J. T. Duffy-Anderson

N. C. Stenseth

Oxford University Press

The Eastern Bering Sea (EBS), the Gulf of Alaska (GOA), and the Barents Sea (BS) share key features: they are dominated by gadoids populations, they are heavily fished, and they are under the influence of large-scale climatic fluctuations. Previous studies have shown that climate forcing can impact the species composition and the food webs in each of these ecosystems. However, food webs and species interactions can mediate the relative impact of climatic perturbation on community. For example, a relatively small increase in SST over the western GOA region during the mid-1970s led to a spectacular change in the local species community, but a reverse in climatic conditions that occurred during the late 1980s did not result in similar biological changes. This chapter reviews the food webs of the GOA, EBS, and BS, and relates them to prevailing large-scale climatic phases. The comparative approach adopted in this review is aimed at increasing the understanding of the mechanisms linking climate change and food web dynamics in marine ecosystems.

Keywords:   Eastern Bering Sea, Gulf of Alaska, Barents Sea, fisheries, pelagic food webs, climate variability, ecosystem dynamics

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