Impacts of artisanal fishing on key functional groups and the potential vulnerability of coral reefs
2010 (English)In: Environmental Conservation, ISSN 0376-8929, E-ISSN 1469-4387, Vol. 36, no 4, 327-337 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
Online, 2010. Vol. 36, no 4, 327-337 p.
Other Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:su:diva-53762DOI: 10.1017/S0376892910000147OAI: oai:DiVA.org:su-53762DiVA: diva2:391259
EC Perspectives2011-01-242011-01-242011-12-16Bibliographically approved