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Marine Ecosystems and Global Change$
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Manuel Barange, John G. Field, Roger P. Harris, Eileen E. Hofmann, R. Ian Perry, and Francisco Werner

Print publication date: 2010

Print ISBN-13: 9780199558025

Published to Oxford Scholarship Online: May 2010

DOI: 10.1093/acprof:oso/9780199558025.001.0001

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Dynamics of marine ecosystems: ecological processes

Dynamics of marine ecosystems: ecological processes

Chapter:
(p.179) Chapter 7 Dynamics of marine ecosystems: ecological processes
Source:
Marine Ecosystems and Global Change
Author(s):

Coleen L. Moloney

Astrid Jarre

Shingo Kimura

David L. Mackas

Olivier Maury

Eugene J. Murphy

William T. Peterson

Jeffrey A. Runge

Kazuaki Tadokoro

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199558025.003.0007

GLOBEC studies focused on biological—physical interactions of target species in different study regions, emphasizing responses of organisms to varying physical forces. Population‐level processes were shown to be important, with ecological responses often being ecosystem‐specific. The timing of biological events (e.g. spring bloom, entry/exit from diapause, and fish spawning) is susceptible to environmental change. Many species can adapt their feeding modes and diets, but changes in mortality imposed by heavy fishing can disrupt biological systems, making them increasingly vulnerable to perturbations. Some organisms can move away from unfavourable conditions, changing the vertical and horizontal linkages between disparate ecosystems with unknown consequences. Trophic controls in food webs vary over time and space and food web structures also change, both over the short term and through shifts in regimes, sometimes irreversibly. There is an ongoing requirement to integrate ecological processes, from biogeochemistry to top predators, to understand potential consequences of global change.

Keywords:   alternative pathways, control, feeding, food webs, life cycles, regime shifts, spatial shifts, target species, timing, trophic

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