Rodrigo H. Bustamante, Thomas A. Okey, and Stuart Banks
- Published in print:
- 2008
- Published Online:
- May 2008
- ISBN:
- 9780195319958
- eISBN:
- 9780199869596
- Item type:
- chapter
- Publisher:
- Oxford University Press
- DOI:
- 10.1093/acprof:oso/9780195319958.003.0006
- Subject:
- Biology, Aquatic Biology
This chapter describes ecology of the Galapagos rocky reef system and the important role of biogeographic position on biodiversity, the El Niño cycle, and the history of resource extraction on the ...
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This chapter describes ecology of the Galapagos rocky reef system and the important role of biogeographic position on biodiversity, the El Niño cycle, and the history of resource extraction on the current state of the ecosystem. The chapter presents a model of the energetic pathways in the ecosystem and its predictions for fisheries yields and the role of key species. The history of exploitation is outlined as well as the role of the current marine protected areas to develop sustainable management system.Less
This chapter describes ecology of the Galapagos rocky reef system and the important role of biogeographic position on biodiversity, the El Niño cycle, and the history of resource extraction on the current state of the ecosystem. The chapter presents a model of the energetic pathways in the ecosystem and its predictions for fisheries yields and the role of key species. The history of exploitation is outlined as well as the role of the current marine protected areas to develop sustainable management system.
Michael J. Fogarty and Jeremy S. Collie
- Published in print:
- 2020
- Published Online:
- September 2020
- ISBN:
- 9780198768937
- eISBN:
- 9780191822209
- Item type:
- chapter
- Publisher:
- Oxford University Press
- DOI:
- 10.1093/oso/9780198768937.003.0013
- Subject:
- Biology, Aquatic Biology, Ecology
Energy entering at the base of the food web places inherent constraints on total harvest from an ecosystem. Empirical relationships have been established between fishery yield and factors such as ...
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Energy entering at the base of the food web places inherent constraints on total harvest from an ecosystem. Empirical relationships have been established between fishery yield and factors such as chlorophyll concentration, primary production, and other lower trophic level variables to guide management actions. Extension of network models to include harvesting has a long lineage and these models are now being employed worldwide to help guide management decisions. These static mass-balance models have been augmented with a fully dynamic modeling component to explore management options. Biomass spectrum models for exploited ecosystems have also been developed. In addition to direct effects on target species, fisheries can affect the structure and function of ecosystems through habitat damage and incidental catch of non-target organisms, including threatened and endangered species. Increasingly, the effects of climate change are being addressed in ecosystem models through their potential effect on production at all levels of the ecosystem.Less
Energy entering at the base of the food web places inherent constraints on total harvest from an ecosystem. Empirical relationships have been established between fishery yield and factors such as chlorophyll concentration, primary production, and other lower trophic level variables to guide management actions. Extension of network models to include harvesting has a long lineage and these models are now being employed worldwide to help guide management decisions. These static mass-balance models have been augmented with a fully dynamic modeling component to explore management options. Biomass spectrum models for exploited ecosystems have also been developed. In addition to direct effects on target species, fisheries can affect the structure and function of ecosystems through habitat damage and incidental catch of non-target organisms, including threatened and endangered species. Increasingly, the effects of climate change are being addressed in ecosystem models through their potential effect on production at all levels of the ecosystem.
