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Trophic cascades in a formerly cod-dominated ecosystem.

Kenneth T Frank·Brian Petrie·Jae S Choi·William C Leggett
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Abstract

Removal of top predators from ecosystems can result in cascading effects through the trophic levels below, completely restructuring the food web. Cascades have been observed in small-scale or simple food webs, but not in large, complex, open-ocean ecosystems. Using data spanning many decades from a once cod-dominated northwest Atlantic ecosystem, we demonstrate a trophic cascade in a large marine ecosystem. Several cod stocks in other geographic areas have also collapsed without recovery, suggesting the existence of trophic cascades in these systems.

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AnimalsAtlantic OceanBiodiversityBiomassEcosystemFisheriesFishesFood ChainGadus morhuaInvertebratesPhytoplanktonPopulation DensityPopulation DynamicsPredatory BehaviorPrincipal Component AnalysisSeals, EarlessSeawaterTime FactorsZooplanktonJournal ArticleResearch Support, Non-U.S. Gov't

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Kenneth T Frank, Brian Petrie, Jae S Choi, William C Leggett. 2005-06-10. Trophic cascades in a formerly cod-dominated ecosystem.. https://doi.org/10.1126/science.1113075

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