cbniles's ecosystem [5 articles]

Abstract

Coll, M., Shannon, L. J., Yemane, D., Link, J. S., Ojaveer, H., Neira, S., Jouffre, D., Labrosse, P., Heymans, J. J., Fulton, E. A., and Shin, Y-J. 2010. Ranking the ecological relative status of exploited marine ecosystems. - ICES Journal of Marine Science, 67: 000-000. A set of simple, data-based ecological indicators was used to rank exploited ecosystems regarding fishing impacts with respect to their status, trends, and ecosystem EAF attributes. Expected theoretical changes in indicators with respect to increasing fishing ...

Abstract

Integrated ecosystem assessments challenge the broader scientific community to move beyond the important task of tallying insults to marine ecosystems to developing quantitative tools that can support the decisions national and regional resource managers must make. ...

Abstract

As reflected in the National Wildlife Refuge System Improvement Act of 1997 and the National Forest Management Act of 1976, undefined biodiversity mandates and related ecological concepts are increasingly appearing in the federal laws governing the public lands. The question arises whether such general statutory provisions can be translated into enforceable legal standards and policies. Both the U.S. Fish and Wildlife Service and the Forest Service have promulgated extensive policies and rules incorporating new biodiversity and ecological integrity obligations into their ...

Abstract

Evaluation of the ecosystem effects of fishing presupposes that it is possible to measure the state of an ecosystem, detect differences among measures of its state, and determine if the differences are due to chance or impacts of fishing. Ecologists have developed or adopted four main classes of community/ecosystem metrics for such tasks: diversity and similarity indices, ordination methods, metrics of aggregate community properties, and metrics derived from ecosystem models. Each class is explained briefly, and guidance is given to the ...

Abstract

Many ecological indicators have been proposed to detect and describe the effects of fishing on marine ecosystems, but few have been evaluated formally. Here, simulation models of two marine systems off southeastern Australia (a large marine embayment, and an EEZ-scale regional marine ecosystem) are used to evaluate the performance of a suite of ecological indicators. The indicators cover species, assemblages, habitats, and ecosystems, including quantities derived from models such as Ecopath. The simulation models, based on the Atlantis framework, incorporate the ...