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SPECIES INTERACTIONS IN INTERTIDAL FOOD WEBS: PREY OR PREDATION REGULATION OF INTERMEDIATE PREDATORS?(Statistical Data Included)
- Article from:
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Ecology
- Article date:
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August 1, 2000
- Author:
- NAVARRETE, SERGIO A.; MENGE, BRUCE A.; DALEY, BRYON A.
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Copyright informationCOPYRIGHT 2000 Ecological Society of America. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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SERGIO A. NAVARRETE [1,3]
BRUCE A. MENGE [2]
BRYON A. DALEY [2,4]
Abstract. Most natural food webs have more than one predator species, and many have trophic interactions among these predators. When a top predator feeds on an intermediate predator and they both feed on a shared basal resource, a phenomenon labeled intraguild predation (IGP), the potential exists for complex food web dynamics due to predation and competitive effects. Here we investigate the relative importance of direct predation vs. competition by a top predator on an intermediate predator.
The study system is the rocky intertidal interaction web formed by the predatory seastar Pisaster ...