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Proc Biol Sci
2015 Jan 22;2821799:20141817. doi: 10.1098/rspb.2014.1817.
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Exploitation and recovery of a sea urchin predator has implications for the resilience of southern California kelp forests.
Hamilton SL
,
Caselle JE
.
Abstract
Size-structured predator-prey interactions can be altered by the history of exploitation, if that exploitation is itself size-selective. For example, selective harvesting of larger sized predators can release prey populations in cases where only large individuals are capable of consuming a particular prey species. In this study, we examined how the history of exploitation and recovery (inside marine reserves and due to fisheries management) of California sheephead (Semicossyphus pulcher) has affected size-structured interactions with sea urchin prey in southern California. We show that fishing changes size structure by reducing sizes and alters life histories of sheephead, while management measures that lessen or remove fishing impacts (e.g. marine reserves, effort restrictions) reverse these effects and result in increases in density, size and biomass. We show that predation on sea urchins is size-dependent, such that the diet of larger sheephead is composed of more and larger sized urchins than the diet of smaller fish. These results have implications for kelp forest resilience, because urchins can overgraze kelp in the absence of top-down control. From surveys in a network of marine reserves, we report negative relationships between the abundance of sheephead and urchins and the abundance of urchins and fleshy macroalgae (including giant kelp), indicating the potential for cascading indirect positive effects of top predators on the abundance of primary producers. Management measures such as increased minimum size limits and marine reserves may serve to restore historical trophic roles of key predators and thereby enhance the resilience of marine ecosystems.
Arkema,
Direct and indirect effects of giant kelp determine benthic community structure and dynamics.
2009, Pubmed
Arkema,
Direct and indirect effects of giant kelp determine benthic community structure and dynamics.
2009,
Pubmed
Babcock,
Decadal trends in marine reserves reveal differential rates of change in direct and indirect effects.
2010,
Pubmed
Botsford,
Marine protected area networks in California, USA.
2014,
Pubmed
Brooks,
Predation, Body Size, and Composition of Plankton.
1965,
Pubmed
Cowen,
The effects of sheephead (Semicossyphus pulcher) predation on red sea urchin (Strongylocentrotus franciscanus) populations: an experimental analysis.
1983,
Pubmed
,
Echinobase
Estes,
Trophic downgrading of planet Earth.
2011,
Pubmed
Guidetti,
Marine reserves reestablish lost predatory interactions and cause community changes in rocky reefs.
2006,
Pubmed
,
Echinobase
Hamilton,
Size-selective harvesting alters life histories of a temperate sex-changing fish.
2007,
Pubmed
Hamilton,
Utilizing spatial demographic and life history variation to optimize sustainable yield of a temperate sex-changing fish.
2011,
Pubmed
Hamilton,
Extensive geographic and ontogenetic variation characterizes the trophic ecology of a temperate reef fish on southern California (USA) rocky reefs.
2011,
Pubmed
,
Echinobase
Hamilton,
Dietary niche expansion of a kelp forest predator recovering from intense commercial exploitation.
2014,
Pubmed
,
Echinobase
Hamilton,
Incorporating biogeography into evaluations of the Channel Islands marine reserve network.
2010,
Pubmed
Hamilton,
Exploitation and recovery of a sea urchin predator has implications for the resilience of southern California kelp forests.
2015,
Pubmed
Hunsicker,
Functional responses and scaling in predator-prey interactions of marine fishes: contemporary issues and emerging concepts.
2011,
Pubmed
Kay,
Collaborative assessment of California spiny lobster population and fishery responses to a marine reserve network.
2012,
Pubmed
Ling,
Overfishing reduces resilience of kelp beds to climate-driven catastrophic phase shift.
2009,
Pubmed
,
Echinobase
Reed,
Wave disturbance overwhelms top-down and bottom-up control of primary production in California kelp forests.
2011,
Pubmed
,
Echinobase
Rijnsdorp,
Fisheries as a large-scale experiment on life-history evolution: disentangling phenotypic and genetic effects in changes in maturation and reproduction of North Sea plaice, Pleuronectes platessa L.
1993,
Pubmed
Schmitt,
Gape-limitation, foraging tactics and prey size selectivity of two microcarnivorous species of fish.
1984,
Pubmed
Shackell,
Decline in top predator body size and changing climate alter trophic structure in an oceanic ecosystem.
2010,
Pubmed
Shears,
Marine reserves demonstrate top-down control of community structure on temperate reefs.
2002,
Pubmed
,
Echinobase
Tetreault,
Temperate marine reserves enhance targeted but not untargeted fishes in multiple no-take MPAs.
2007,
Pubmed