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Post-bleaching alterations in coral reef communities
Newcastle University, UK; Stockholm University, Sweden.
Södertörn University, School of Natural Sciences, Technology and Environmental Studies, Environmental Science.ORCID iD: 0000-0002-7552-2431
University of Dar es Salaam, Tanzania.
Stockholm University, Sweden.
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2023 (English)In: Marine Pollution Bulletin, ISSN 0025-326X, E-ISSN 1879-3363, Vol. 186, article id 114479Article in journal (Refereed) Published
Abstract [en]

We explored the extent of post-bleaching impacts, caused by the 2014–2016 El Niño Southern Oscillation (ENSO) event, on benthic community structure (BCS) and herbivores (fish and sea urchins) on seven fringing reefs, with differing protection levels, in Zanzibar, Tanzania. Results showed post-bleaching alterations in BCS, with up to 68 % coral mortality and up to 48 % increase in turf algae cover in all reef sites. Herbivorous fish biomass increased after bleaching and was correlated with turf algae increase in some reefs, while the opposite was found for sea urchin densities, with significant declines and complete absence. The severity of the impact varied across individual reefs, with larger impact on the protected reefs, compared to the unprotected reefs. Our study provides a highly relevant reference point to guide future research and contributes to our understanding of post-bleaching impacts, trends, and evaluation of coral reef health and resilience in the region.

Place, publisher, year, edition, pages
Elsevier, 2023. Vol. 186, article id 114479
Keywords [en]
El Niño, Coral bleaching, Turf algae, Herbivores, Coral reef resilience, Tanzania
National Category
Ecology
Identifiers
URN: urn:nbn:se:sh:diva-50463DOI: 10.1016/j.marpolbul.2022.114479ISI: 000954336200001PubMedID: 36549237Scopus ID: 2-s2.0-85144417776OAI: oai:DiVA.org:sh-50463DiVA, id: diva2:1723210
Funder
Sida - Swedish International Development Cooperation AgencyAvailable from: 2023-01-02 Created: 2023-01-02 Last updated: 2023-04-18Bibliographically approved

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Gullström, Martin

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Citation style
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