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Human Alteration of Food Webs: Research Priorities for Conservation and Management

abstract1 (full description below): Pp 31-58 in Conservation Biology: Research priorities for the next decade. Island Press. Soul
Human Alteration of Food Webs. PDF/Acrobat file  

Most natural food webs have been altered profoundly through human activities. Human perturbations of food-web interactions result from over-exploitation of species, particularly top predators; introduction of exotics; habitat destruction and fragmentation; and changes in resource availability through alteration of biogeochemical cycles, enhanced loadings of nutrients and organics, and "subsidies" of natural food webs through waste disposal or discarded fishery bycatch. Decades of experimental studies have shown dramatic effects of consumer-resource interactions on populations and communities.