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Reconciling conflict between the direct and indirect effects of marine reserve protection

  • NICK T. SHEARS (a1), DAVID J. KUSHNER (a2), STEPHEN L. KATZ (a3) and STEVEN D. GAINES (a4)
Summary
SUMMARY

No-take marine reserves directly promote the recovery of predatory species, which can have negative indirect effects on prey populations in reserves. When harvesting also occurs on prey species there is potential conflict between the direct and indirect effects of protection, and reserves may not have conservation benefits for prey species. For example, sea urchins are fished in many regions, but may decline in reserves due to increased predation rates. To investigate this potential conflict, this paper compares density, size, biomass and reproductive potential of both a harvested and an unharvested urchin species between a long-term reserve and unprotected sites in California. Consistent with density-mediated indirect interactions, densities of the unharvested species were 3.4-times higher at unprotected sites compared to reserve sites. However, for the harvested species, densities were comparable between reserve and unprotected sites. Both species were consistently larger at reserve sites, and the biomass and reproductive potential of the harvested species was 4.8- and 7.0-times higher, respectively, than at unprotected sites. This is likely due to differences in size-selectivity between harvesting and predators, and potential compensatory effects of predators. While the generality of these effects needs to be tested, these results suggest mechanisms whereby reserves can benefit both predator and prey species.

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Corresponding author
*Correspondence: Dr Nick Shears, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand e-mail: n.shears@auckland.ac.nz
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R.C. Babcock , N.T. Shears , A.C. Alcala , N.S. Barrett , G.J. Edgar , K.D. Lafferty , T.R. McClanahan & G.R. Russ (2010) Decadal trends in marine reserves reveal differential rates of change in direct and indirect effects. Proceedings of the National Academy of Sciences USA 107: 1825618261.

N.S. Barrett , C.D. Buxton & G.J. Edgar (2009) Changes in invertebrate and macroalgal populations in Tasmanian marine reserves in the decade following protection. Journal of Experimental Marine Biology and Ecology 370: 104119.

R.G. Cole & D. Keuskamp (1998) Indirect effects of protection from exploitation: patterns from populations of Evechinus chloroticus (Echinoidea) in northeastern New Zealand. Marine Ecology Progress Series 173: 215226.

P.K. Dayton , M.J. Tegner , P.B. Edwards & K.L. Riser (1998) Sliding baselines, ghosts, and reduced expectations in kelp forest communities. Ecological Applications 8: 309322.

T.A. Ebert (2008) Longevity and lack of senescence in the red sea urchin Strongylocentrotus franciscanus. Experimental Gerontology 43: 734738.

J.A. Estes & D.O. Duggins (1995) Sea otters and kelp forests in Alaska: generality and variation in a community ecological paradigm. Ecological Monographs 65: 75100.

S.L. Hamilton , J.E. Caselle , D.P. Malone & M.H. Carr (2010) Incorporating biogeography into evaluations of the Channel Islands marine reserve network. Proceedings of the National Academy of Sciences USA 107: 1827218277.

C. Harrold & D.C. Reed (1985) Food availability, sea urchin grazing, and kelp forest community structure. Ecology 66: 11601169.

K.D. Lafferty (2004) Fishing for lobsters indirectly increases epidemics in sea urchins. Ecological Applications 14: 15661573.

D.C.C. Lau , C.P. Dumont , G. Lui & J.W. Qiu (2011) Effectiveness of a small marine reserve in southern China in protecting the harvested sea urchin Anthocidaris crassispina: a mark-and-recapture study. Biological Conservation 144: 26742683.

H.M. Leslie & K.L. McLeod (2007) Confronting the challenges of implementing marine ecosystem-based management. Frontiers in Ecology and the Environment 5: 540548.

F. Micheli , B.S. Halpern , L.W. Botsford & R.R. Warner (2004) Trajectories and correlates of community change in no-take marine reserves. Ecological Applications 14: 17091723.

A. Pais , L.A. Chessa , S. Serra , A. Ruiu , G. Meloni & Y. Donno (2007) The impact of commercial and recreational harvesting for Paracentrotus lividus on shallow rocky reef sea urchin communities in North-western Sardinia, Italy. Estuarine, Coastal and Shelf Science 73: 589597.

D. Pauly , V. Christensen , J. Dalsgaard , R. Froese & F.J. Torres (1998) Fishing down marine food webs. Science 279: 860863.

H.G. Pederson , N.S. Barrett , S.D. Frusher & C.D. Buxton (2008) Effect of predator-prey and competitive interactions on size at emergence in the black-lip abalone Haliotis rubra in a Tasmanian MPA. Marine Ecology Progress Series 366: 9198.

D.C. Reed , P.T. Raimondi , M.H. Carr & L. Goldwasser (2000) The role of dispersal and disturbance in determining spatial heterogeneity in sedentary organisms. Ecology 81 (7): 20112026.

G.W. Roemer & R.K. Wayne (2003) Conservation in conflict: the tale of two endangered species. Conservation Biology 17: 1251.

L. Rogers-Bennett (2007) The ecology of Strongylocentrotus franciscanus and Strongylocentrotus purpuratus. In: Edible Sea Urchins: Biology and Ecology, ed. J.M. Lawrence , pp-393425. Amsterdam, the Netherlands: Elsevier Science BV.

L. Rogers-Bennett , W.A. Bennett , H.C. Fastenau & C.M. Dewees (1995) Spatial variation in red sea urchin reproduction and morphology: implications for harvest refugia. Ecological Applications 5: 11711180.

A.K. Salomon , S.K. Gaichas , N.T. Shears , J.E. Smith , E.M.P. Madin & S.D. Gaines (2010) Fishery-induced trophic cascades: key features and context-dependent effects. Conservation Biology 24: 382394.

N.T. Shears & R.C. Babcock (2003) Continuing trophic cascade effects after 25 years of no-take marine reserve protection. Marine Ecology Progress Series 246: 116.

N.T. Shears , R.C. Babcock & A.K. Salomon (2008) Context-dependent effects of fishing: variation in trophic cascades across environmental gradients. Ecological Applications 18: 18601873.

N.T. Shears & P.M. Ross (2010) Toxic cascades: multiple anthropogenic stressors have complex and unanticipated interactive effects on temperate reefs. Ecology Letters 13: 11491159.

B.D. Smith , L.W. Botsford & S.R. Wing (1998) Estimation of growth and mortality parameters from size frequency distributions lacking age patterns: the red sea urchin (Strongylocentrotus franciscanus) as an example. Canadian Journal of Fisheries and Aquatic Sciences 55: 12361247.

I. Tetreault & R.F. Ambrose (2007) Temperate marine reserves enhance targeted but not untargeted fishes in multiple no-take MPAs. Ecological Applications 17: 22512267.

A. Treves & K.U. Karanth (2003) Human-carnivore conflict and perspectives on carnivore management worldwide. Conservation Biology 17: 1491.

F.C. Tuya , M.L. Soboil & J. Kido (2000) An assessment of the effectiveness of marine protected areas in the San Juan Islands, Washington, USA. ICES Journal of Marine Science: Journal du Conseil 57: 1218.

P. Wabakken , H. Sand , O. Liberg & A. Bjärvall (2001) The recovery, distribution, and population dynamics of wolves on the Scandinavian peninsula, 1978–1998. Canadian Journal of Zoology 79: 710725.

T.J. Willis & M.J. Anderson (2003) Structure of cryptic reef fish assemblages: relationships with habitat characteristics and predator density. Marine Ecology Progress Series 257: 209221.

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Environmental Conservation
  • ISSN: 0376-8929
  • EISSN: 1469-4387
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