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Impacts of artisanal fishing on key functional groups and the potential vulnerability of coral reefs

Published online by Cambridge University Press:  30 March 2010

JERKER LOKRANTZ ,
MAGNUS NYSTRÖM ,
ALBERT V. NORSTRÖM ,
CARL FOLKE  and
JOSHUA E. CINNER
JERKER LOKRANTZ*
Affiliation:
Natural Resource Management, Department of Systems Ecology, Stockholm University, SE-106 91 Stockholm, Sweden Stockholm Resilience Centre, Stockholm University, SE-106 91 Stockholm, Sweden
MAGNUS NYSTRÖM
Affiliation:
Natural Resource Management, Department of Systems Ecology, Stockholm University, SE-106 91 Stockholm, Sweden Stockholm Resilience Centre, Stockholm University, SE-106 91 Stockholm, Sweden
ALBERT V. NORSTRÖM
Affiliation:
Natural Resource Management, Department of Systems Ecology, Stockholm University, SE-106 91 Stockholm, Sweden Stockholm Resilience Centre, Stockholm University, SE-106 91 Stockholm, Sweden
CARL FOLKE
Affiliation:
Natural Resource Management, Department of Systems Ecology, Stockholm University, SE-106 91 Stockholm, Sweden Stockholm Resilience Centre, Stockholm University, SE-106 91 Stockholm, Sweden Beijer Institute of Ecological Economics, Royal Swedish Academy of Sciences, PO Box 50005, SE-104 05 Stockholm, Sweden
JOSHUA E. CINNER
Affiliation:
ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Queensland 4811, Australia
*
*Correspondence: Dr Jerker Lokrantz Tel: +46 8 164484 Fax: +46 8 158417 e-mail: jerker@ecology.su.se
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Summary

Fishing can have major impacts on the structure of coral reef ecosystems. Overfishing of herbivores is particularly detrimental, as it makes the coral system more likely to undergo shifts to macroalgal dominance in the event of coral mass mortality. Knowing when important processes, such as herbivory, are becoming brittle is important because it can provide an opportunity for managers to avoid undesirable ecosystem-level changes. This study investigates the impact of artisanal fishing on three important functional groups of herbivores (grazers, scrapers and excavators) on five coral-dominated reefs outside Zanzibar (Tanzania). There was a negative correlation between fishing pressure and fish biomass, abundance, diversity and species richness. Moreover, fishing had a negative influence on the demographic structure of functional groups, particularly excavators, manifesting itself as a skewness towards smaller individuals within populations. Artisanal fishing can have significant impacts on key functional groups of herbivorous reef fishes which may increase the vulnerability of coral reefs to undesirable ecosystem shifts.

Keywords

artisanal fishingcoral reefsecosystem functionfunctional groupsherbivoryresiliencevulnerabilityZanzibar
Type
EC Perspectives
Information
Environmental Conservation , Volume 36 , Issue 4 , December 2009 , pp. 327 - 337
Copyright
Copyright © Foundation for Environmental Conservation 2010

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References

Barnes, D.J. & Chalker, B.E. (1990) Calcification and photosynthesis in reef-building corals and algae. In: Ecosystems of the World 25: Coral Reefs, ed. Dubinsky, Z., pp. 109–131. New York, NY, USA: Elsevier.Google Scholar
Bellwood, D.R. (1994) A phylogenetic study of the parrotfishes family Scaridae (Pisces: Labroidei), with a revision of genera. Records of the Australian Museum Suppl. 20: 1–86.CrossRefGoogle Scholar
Bellwood, D.R. & Choat, J.H. (1990) A functional analysis of grazing in parrotfishes (family Scaridae): the ecological implications. Environmental Biology of Fishes 28: 189–214.CrossRefGoogle Scholar
Bellwood, D.R., Hoey, A.S. & Choat, J.H. (2003) Limited functional redundancy in high diversity systems: resilience and ecosystem function on coral reefs. Ecology Letters 6: 281–285.CrossRefGoogle Scholar
Bellwood, D.R., Hughes, T.P., Folke, C. & Nyström, M. (2004) Confronting the coral reef crisis. Nature 429: 827–833.CrossRefGoogle ScholarPubMed
Bellwood, D.R., Hughes, T.P. & Hoey, A.S. (2006) Sleeping functional group drives coral reef recovery. Current Biology 16: 2434–2439.CrossRefGoogle ScholarPubMed
Berkeley, S.A., Chapman, C. & Sogard, S.M. (2004) Maternal age as a determinant of larval growth and survival in a marine fish, Sebastes melanops. Ecology 85: 1258–1264.CrossRefGoogle Scholar
Berkes, F., Hughes, T.P., Steneck, R.S., Wilson, J.A., Bellwood, D.R., Crona, B., Folke, C., Gunderson, L.H., Leslie, H.M., Norberg, J., Nyström, M., Olsson, P., Österblom, H., Scheffer, M. & Worm, B. (2006) Globalization, roving bandits, and marine resources. Science 311: 1557–1558.CrossRefGoogle ScholarPubMed
Birkeland, C. & Dayton, P.K. (2005) The importance in fishery management of leaving the big ones. Trends in Ecology and Evolution 20: 356–358.CrossRefGoogle ScholarPubMed
Björk, M., Mohammed, S.M., Björklund, M. & Semesi, A. (1995) Coralline algae, important coral reef builders threatened by pollution. Ambio 24: 502–505.Google Scholar
Bonaldo, R.M. & Bellwood, D.R. (2008) Size-dependent variation in the functional role of the parrotfish Scarus rivulatus on the Great Barrier Reef, Australia. Marine Ecology Progress Series 360: 237–244.CrossRefGoogle Scholar
Bruggemann, J.H., van Kessel, A.M., van Rooij, J.M. & Breeman, A.M. (1996) Bioerosion and sediment ingestion by the Caribbean parrotfish Scarus vetula and Sparisoma viride: implications of fish size, feeding mode and habitat use. Marine Ecology Progress Series 134: 59–71.CrossRefGoogle Scholar
Burkepile, D.E. & Hay, M.E. (2006) Herbivore vs. nutrient control of marine primary producers: context-dependent effects. Ecology 87: 3128–3139.CrossRefGoogle ScholarPubMed
Burkepile, D.E. & Hay, M.E. (2008) Herbivore species richness and feeding complementarity affect community structure and function on a coral reef. Proceedings of the National Academy of Sciences of the United States of America 105: 16201–16206.CrossRefGoogle ScholarPubMed
Carpenter, R.C. (1981) Grazing by Diadema antillarum (Phillippi) and its effects on the benthic algal community. Journal of Marine Research 39: 749–765.Google Scholar
Carpenter, S.R. & Brock, W.A. (2006) Rising variance: a leading indicator of ecological transition. Ecology Letters 9: 308–315.CrossRefGoogle ScholarPubMed
Carpenter, S.R., Westley, F. & Turner, M.G. (2005) Surrogates for resilience of social-ecological systems. Ecosystems 8: 941–944.CrossRefGoogle Scholar
Choat, J.H., Clements, K.D. & Robbins, W.D. (2002) The trophic status of herbivorous fishes on coral reefs. I. Dietary analyses. Marine Biology 140: 613–623.Google Scholar
Cinner, J.E., McClanahan, T.R., Graham, N.A.J., Pratchett, M.S., Wilson, S.K. & Raina, J.B. (2009) Gear-based fisheries management as a potential adaptive response to climate change and coral mortality. Journal of Applied Ecology 46: 724–732.CrossRefGoogle Scholar
Dulvy, N.K., Freckleton, R.P. & Polunin, N.V.C. (2004 a) Coral reef cascades and the indirect effects of predator removal by exploitation. Ecology Letters 7: 410–416.CrossRefGoogle Scholar
Dulvy, N.K., Polunin, N.V.C., Mill, A.C. & Graham, N.A.J. (2004 b) Size structural change in lightly exploited coral reef fish communities: evidence for weak indirect effects. Canadian Journal of Fisheries and Aquatic Sciences 61: 466–475.CrossRefGoogle Scholar
Eakin, C.M. (1996) Where have all the carbonates gone? A model comparison of calcium carbonate budgets before and after the 1982–1983 El Niño at Uva Island in the eastern Pacific. Coral Reefs 15: 109–119.Google Scholar
Edmunds, P.J. & Carpenter, R.C. (2001) Recovery of Diadema antillarum reduces macroalgal cover and increases abundance of juvenile corals on a Caribbean reef. Proceedings of the National Academy of Sciences of the United States of America 98: 5067–5071.CrossRefGoogle ScholarPubMed
English, S., Wilkinson, C. & Baker, V. (1997) Survey Manual for Tropical Marine Resources. Second Edition. Townsville, Australia: ASEAN-Australia Marine Science Project, Australian Institute of Marine Science: 390 pp.Google Scholar
Evans, R.D., Russ, G.R. & Kritzer, J.P. (2008) Batch fecundity of Lutjanus carponotatus (Lutjanidae) and implications of no-take marine reserves on the Great Barrier Reef, Australia. Coral Reefs 27: 179–189.CrossRefGoogle Scholar
Froese, R. & Pauly, D. (2005) FishBase [www document]. URL http://www.fishbase.orgGoogle Scholar
Glynn, P.W. (1990) Feeding ecology of selected coral reef macroconsumers: patterns and effects on coral community structure. In: Ecosystems of the World 25: Coral Reefs, ed. Dubinsky, Z., pp. 365–400. New York, NY, USA: Elsevier.Google Scholar
Graham, N.A.J., Dulvy, N.K., Jennings, S. & Polunin, N.V.C. (2005) Size-spectra as indicators of the effects of fishing on coral reef fish assemblages. Coral Reefs 24: 118–124.CrossRefGoogle Scholar
Graham, N.A.J., Wilson, S.K., Jennings, S., Polunin, N.V.C., Bijoux, J.P. & Robinson, J. (2006) Dynamic fragility of oceanic coral reef ecosystems. Proceedings of the National Academy of Sciences of the United States of America 103: 8425–8429.CrossRefGoogle ScholarPubMed
Harrison, P.L. & Wallace, C.C. (1990) Reproduction, dispersal and recruitment of scleractinian corals. In: Ecosystems of the World 25: Coral Reefs, ed. Dubinsky, Z., pp. 133–207. New York, NY, USA: Elsevier.Google Scholar
Hawkins, J.P. & Roberts, C.M. (2004) Effects of artisanal fishing on Caribbean coral reefs. Conservation Biology 18: 215–226.CrossRefGoogle Scholar
Hoey, A.S. & Bellwood, D.R. (2008) Cross-shelf variation in the role of parrotfishes on the Great Barrier Reef. Coral Reefs 27: 34–47.CrossRefGoogle Scholar
Horn, M.H. (1989) Biology of marine herbivorous fishes. Oceanography and Marine Biology: an Annual Review 27: 167–272.Google Scholar
Hughes, T.P. (1994) Catastrophes, phase-shifts, and large-scale degradation of a Caribbean coral reef. Science 265: 1547–1551.CrossRefGoogle ScholarPubMed
Hughes, T.P., Bellwood, D.R., Folke, C., Steneck, R.S. & Wilson, J. (2005) New paradigms for supporting the resilience of marine ecosystems. Trends in Ecology and Evolution 20: 380–386.CrossRefGoogle ScholarPubMed
Hughes, T.P., Rodrigues, M.J., Bellwood, D.R., Ceccarelli, D., Hoegh-Guldberg, O., McCook, L., Moltschaniwskyj, N., Pratchett, M.S., Steneck, R.S. & Willis, B. (2007) Phase shifts, herbivory, and the resilience of coral reefs to climate change. Current Biology 17: 360–365.CrossRefGoogle ScholarPubMed
Ives, A.R. & Carpenter, S.R. (2007) Stability and diversity of ecosystems. Science 317: 58–62.CrossRefGoogle ScholarPubMed
Jennings, S., Grandcourt, E.M. & Polunin, N.V.C. (1995) The effects of fishing on the diversity, biomass and trophic structure of Seychelles’ reef fish communities. Coral Reefs 14: 225–235.CrossRefGoogle Scholar
Jiddawi, N.S. & Khatib, H. (2008) Zanzibar fisheries frame survey 2007. Department of Fisheries and Marine Resources. Institute of Marine Science, University of Dar es Salaam, Tanzania: 61 pp.Google Scholar
Jiddawi, N.S. & Öhman, M.C. (2002) Marine fisheries in Tanzania. Ambio 31: 518–527.CrossRefGoogle ScholarPubMed
Jones, G.P., McCormick, M.I., Srinivasan, M. & Eagle, J.V. (2004) Coral decline threatens fish biodiversity in marine reserves. Proceedings of the National Academy of Science USA 101: 8251–8253.CrossRefGoogle ScholarPubMed
Kaunda-Arara, B. & Rose, G.A. (2004) Long-distance movements of coral reef fishes. Coral Reefs 23: 410–412.CrossRefGoogle Scholar
Lessios, H.A. (1988) Mass mortality of Diadema antillarum in the caribbean: what have we learned? Annual Review of Ecology and Systematics 19: 371–393.CrossRefGoogle Scholar
Lewis, S.M. (1986) The role of herbivorous fishes in the organization of a Caribbean reef community. Ecological Monographs 56: 183–200.CrossRefGoogle Scholar
Lindahl, U., Öhman, M.C. & Schelten, C.K. (2001) The 1997/1998 mass mortality of corals: effects on fish communities on a Tanzanian coral reef. Marine Pollution Bulletin 42: 127–131.CrossRefGoogle ScholarPubMed
Lokrantz, J., Nystrom, M., Thyresson, M. & Johansson, C. (2008) The non-linear relationship between body size and function in parrotfishes. Coral Reefs 27: 967–974.CrossRefGoogle Scholar
Mangi, S.C. & Roberts, C.M. (2006) Quantifying the environmental impacts of artisanal fishing gear on Kenya's coral reef ecosystems. Marine Pollution Bulletin 52: 1646–1660.CrossRefGoogle ScholarPubMed
McClanahan, T.R. & Cinner, J.E. (2008) A framework for adaptive gear and ecosystem-based management in the artisanal coral reef fishery of Papua New Guinea. Aquatic Conservation: Marine and Freshwater Ecosystems 18: 493–507.CrossRefGoogle Scholar
McClanahan, T.R. & Shafir, S.H. (1990) Causes and consequences of sea urchin abundance and diversity in Kenyan coral reef lagoons. Oecologia 83: 362–370.CrossRefGoogle ScholarPubMed
McClanahan, T.R., Maina, J. & Pet-Soede, L. (2002) Effects of the 1998 coral mortality on Kenyan coral reefs and fisheries. Ambio 31: 543–550.CrossRefGoogle ScholarPubMed
McClanahan, T.R., Marnane, M.J., Cinner, J.E. & Kiene, W.E. (2006) A comparison of marine protected areas and alternative approaches to coral-reef management. Current Biology 16: 1408–1413.CrossRefGoogle ScholarPubMed
McClanahan, T.R., Polunin, N. & Done, T. (2002) Ecological states and the resilience of coral reefs. Conservation Ecology 6: 18.CrossRefGoogle Scholar
McClanahan, T.R., Sala, E., Stickels, P.A., Cokos, B.A., Baker, A.C., Starger, C.J. & Jones, S.H. (2003) Interaction between nutrients and herbivory in controlling algal communities and coral condition on Glover's Reef, Belize. Marine Ecology Progress Series 261: 135–147.CrossRefGoogle Scholar
McCook, L.J., Jompa, J. & Diaz-Pulido, G. (2001) Competition between corals and algae on coral reefs: a review of evidence and mechanisms. Coral Reefs 19: 400–417.CrossRefGoogle Scholar
Mumby, P.J. (2006) The impact of exploiting grazers (Scaridae) on the dynamics of Caribbean coral reefs. Ecological Applications 16: 747–769.CrossRefGoogle ScholarPubMed
Mumby, P.J., Dahlgren, C.P., Harborne, A.R., Kappel, C.V., Micheli, F., Brumbaugh, D.R., Holmes, K.E., Mendes, J.M., Broad, K., Sanchirico, J.N., Buch, K., Box, S., Stoffle, R.W. & Gill, A.B. (2006) Fishing, trophic cascades, and the process of grazing on coral reefs. Science 311: 98–101.CrossRefGoogle ScholarPubMed
Mumby, P.J., Hastings, A. & Edwards, H.J. (2007 a) Thresholds and the resilience of Caribbean coral reefs. Nature 450: 98–101.CrossRefGoogle ScholarPubMed
Mumby, P.J., Harborne, A.R., Williams, J., Kappel, C.V., Brumbaugh, D.R., Micheli, F., Holmes, K.E., Dahlgren, C.P., Paris, C.B. & Blackwell, P.G. (2007 b) Trophic cascade facilitates coral recruitment in a marine reserve. Proceedings of the National Academy of Sciences of the United States of America 104: 8362–8367.CrossRefGoogle Scholar
Munro, J.L. (1983) The composition and magnitude of trap catches in Jamaican waters. In: Caribbean Coral Reef Fishery Resources, ed. Munro, J. L., pp. 33–49. Makati, Philippines: ICLARM Studies and Reviews 7.Google Scholar
Muthiga, N., Costa, A., Motta, H., Muhando, C., Mwaipopo, R. & Schleyer, C. (2008) Status of coral reefs in East Africa: Kenya, Tanzania, Mozambique and South Africa. In: Status of Coral Reefs of the World: 2008, ed. Wilkinson, C., pp. 91–104. Townsville, Australia: Global Coral Reef Monitoring Network and Reef and Rainforest Research Center.Google Scholar
Norström, A.V., Nyström, M., Lokrantz, J. & Folke, C. (2009) Multiple alternative states on coral reefs: beyond coral–macroalgal phase shifts. Marine Ecology Progress Series 376: 295–306.CrossRefGoogle Scholar
Nyström, M. (2006) Redundancy and response diversity of functional groups: implications for the resilience of coral reefs. Ambio 35: 30–35.CrossRefGoogle ScholarPubMed
Nyström, M., Folke, C. & Moberg, F. (2000) Coral reef disturbance and resilience in a human-dominated environment. Trends in Ecology and Evolution 15: 413–417.CrossRefGoogle Scholar
Nyström, M., Graham, N.A.J., Lokrantz, J. & Norström, A.V. (2008) Capturing the cornerstones of coral reef resilience: linking theory to practice. Coral Reefs 27: 795–809.CrossRefGoogle Scholar
Pace, M.L., Cole, J.J., Carpenter, S.R. & Kitchell, J.F. (1999) Trophic cascades revealed in diverse ecosystems. Trends in Ecology and Evolution 14: 483–488.CrossRefGoogle ScholarPubMed
Petersen, C.W. & Warner, R.R. (2002) The ecological context of reproductive behavior. In: Coral Reef Fishes: Dynamics and Diversity in a Complex Ecosystem, ed. Sale, P. F., pp. 103–118. San Diego, CA, USA: Academic Press.CrossRefGoogle Scholar
Rakitin, A. & Kramer, D.L. (1996) Effect of a marine reserve on the distribution of coral reef fishes in Barbados. Marine Ecology Progress Series 131: 97–113.CrossRefGoogle Scholar
Riedmiller, S. (1998) The Chumbe Island Coral Park Project: Management experiences of a private marine conservation project. In: International Tropical Marine Ecosystems Management Symposium (ITMEMS), ed. Dight, I., Kenchington, R. & Baldwin, J., pp. 222–235. Townsville Australia: International Coral Reef Initiative (ICRI).Google Scholar
Russ, G.R. & Alcala, A.C. (1996) Do marine reserves export adult fish biomass? Evidence from Apo Island, central Philippines. Marine Ecology Progress Series 132: 1–9.CrossRefGoogle Scholar
Sano, M. (2004) Short-term effects of a mass coral bleaching event on a reef fish assemblage at Iriomote Island, Japan. Fisheries Science 70: 41–46.CrossRefGoogle Scholar
Scheffer, M. & van Nes, E.H. (2007) Shallow lakes theory revisited: various alternative regimes driven by climate, nutrients, depth and lake size. Hydrobiologia 584: 455–466.CrossRefGoogle Scholar
Shaghude, Y.W., Wannäs, K.O. & Mahongo, S.B. (2002) Biogenic assemblage and hydrodynamic settings of the tidally dominated reef platform sediments of the Zanzibar channel. Western Indian Ocean Journal of Marine Science 1: 107–116.Google Scholar
Steneck, R.S. (1988) Herbivory on coral reefs: a synthesis. In: Proceedings of the 6th International Coral Reef Symposium, ed. Choat, J.H., Barnes, D., Borowitzka, MA., Coll, J.C., Davies, P.J., Flood, P., Hatcher, B.G., Hopley, D., Hutchings, P.A., Kinsey, D., Orme, G.R., Pichon, M., Sale, P.F., Sammarco, P., Wallace, C.C., Wilkinson, C., Wolanski, E. & Bellwood, O., pp. 37–49. Townsville, Australia.Google Scholar
Steneck, R.S. (2001) Functional groups. In: Encyclopedia of Biodiversity, ed. Levin, S., pp. 121–139. New York, NY, USA: Academic Press.CrossRefGoogle Scholar
Williams, I.D. & Polunin, N.V.C. (2001) Large-scale associations between macroalgal cover and grazer biomass on mid-depth reefs in the Caribbean. Coral Reefs 19: 358–366.CrossRefGoogle Scholar
Williams, I.D., Polunin, N.V.C. & Hendrick, V.J. (2001) Limits to grazing by herbivorous fishes and the impact of low coral cover on macroalgal abundance on a coral reef in Belize. Marine Ecology Progress Series 222:187–196.CrossRefGoogle Scholar
Wilson, S.K., Graham, N.A.J., Pratchett, M.S., Jones, G.P. & Polunin, N.V.C. (2006) Multiple disturbances and the global degradation of coral reefs: are reef fishes at risk or resilient? Global Change Biology 12: 2220–2234.CrossRefGoogle Scholar
Wing, S.R. & Wing, E.S. (2001) Prehistoric fisheries in the Caribbean. Coral Reefs 20: 1–8.Google Scholar
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