Decline in coral cover and flattening of the reefs around Mauritius (1998–2010)
Coral reefs are degrading through the impacts of multiple anthropogenic stressors. How are coral reef communities going to change and how to protect them for future generations are important conservation questions. Using coral reef data from Mauritius, we examined changes in cover in 23 benthic grou...
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| Format: | Article |
| Language: | English |
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PeerJ Inc.
2018-11-01
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| Online Access: | https://peerj.com/articles/6014.pdf |
| _version_ | 1797420374791553024 |
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| author | Jennifer A. Elliott Mark R. Patterson Caroline G. Staub Meera Koonjul Stephen M. Elliott |
| author_facet | Jennifer A. Elliott Mark R. Patterson Caroline G. Staub Meera Koonjul Stephen M. Elliott |
| author_sort | Jennifer A. Elliott |
| collection | DOAJ |
| description | Coral reefs are degrading through the impacts of multiple anthropogenic stressors. How are coral reef communities going to change and how to protect them for future generations are important conservation questions. Using coral reef data from Mauritius, we examined changes in cover in 23 benthic groups for a 13-yr period and at 15 sites. Moreover, we determined which land-based stressor out of four (human population, agriculture, tourism, rainfall) correlated the most with the observed changes in coral reef cover. Among the stony corals, Acropora corals appeared to be the most impacted, decreasing in cover at many sites. However, the non-Acropora encrusting group increased in cover at several sites. The increase in abundance of dead corals and rubble at some sites also supported the observations of stony coral decline during the study period. Additionally, the decline in stony corals appeared to be more pronounced in second half of the study period for all sites suggesting that a global factor rather than a local factor was responsible for this decline. There was little change in cover for the other benthic groups, some of which were quite rare. Human population was significantly correlated with changes in coral reef cover for 11 sites, followed by tourism and agriculture. Rainfall, a proxy for runoff, did not appear to affect coral reef cover. Overall, our results showed that there has been a decline of stony coral cover especially the ones with complex morphologies, which in turn suggest that coral reefs around Mauritius have experienced a decline in habitat complexity during the study period. Our study also suggests that humans are an important factor contributing to the demise of coral reefs around the island. |
| first_indexed | 2024-03-09T07:01:37Z |
| format | Article |
| id | doaj.art-da672bafbbc94a15adefec0b82f8e558 |
| institution | Directory Open Access Journal |
| issn | 2167-8359 |
| language | English |
| last_indexed | 2024-03-09T07:01:37Z |
| publishDate | 2018-11-01 |
| publisher | PeerJ Inc. |
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| spelling | doaj.art-da672bafbbc94a15adefec0b82f8e5582023-12-03T09:51:54ZengPeerJ Inc.PeerJ2167-83592018-11-016e601410.7717/peerj.6014Decline in coral cover and flattening of the reefs around Mauritius (1998–2010)Jennifer A. Elliott0Mark R. Patterson1Caroline G. Staub2Meera Koonjul3Stephen M. Elliott4Marine Science Center, Northeastern University, Nahant, MA, United States of AmericaMarine Science Center, Northeastern University, Nahant, MA, United States of AmericaInstitute of Food and Agricultural Sciences International Programs, University of Florida, Gainesville, FL, United States of AmericaAlbion Fisheries Research Center, Ministry of Fisheries, Petite Rivière, MauritiusWoods Hole Oceanographic Institution, Woods Hole, MA, United States of AmericaCoral reefs are degrading through the impacts of multiple anthropogenic stressors. How are coral reef communities going to change and how to protect them for future generations are important conservation questions. Using coral reef data from Mauritius, we examined changes in cover in 23 benthic groups for a 13-yr period and at 15 sites. Moreover, we determined which land-based stressor out of four (human population, agriculture, tourism, rainfall) correlated the most with the observed changes in coral reef cover. Among the stony corals, Acropora corals appeared to be the most impacted, decreasing in cover at many sites. However, the non-Acropora encrusting group increased in cover at several sites. The increase in abundance of dead corals and rubble at some sites also supported the observations of stony coral decline during the study period. Additionally, the decline in stony corals appeared to be more pronounced in second half of the study period for all sites suggesting that a global factor rather than a local factor was responsible for this decline. There was little change in cover for the other benthic groups, some of which were quite rare. Human population was significantly correlated with changes in coral reef cover for 11 sites, followed by tourism and agriculture. Rainfall, a proxy for runoff, did not appear to affect coral reef cover. Overall, our results showed that there has been a decline of stony coral cover especially the ones with complex morphologies, which in turn suggest that coral reefs around Mauritius have experienced a decline in habitat complexity during the study period. Our study also suggests that humans are an important factor contributing to the demise of coral reefs around the island.https://peerj.com/articles/6014.pdfCoral morphologyCoral bleachingCoral reef monitoringnMDSHuman impacts |
| spellingShingle | Jennifer A. Elliott Mark R. Patterson Caroline G. Staub Meera Koonjul Stephen M. Elliott Decline in coral cover and flattening of the reefs around Mauritius (1998–2010) PeerJ Coral morphology Coral bleaching Coral reef monitoring nMDS Human impacts |
| title | Decline in coral cover and flattening of the reefs around Mauritius (1998–2010) |
| title_full | Decline in coral cover and flattening of the reefs around Mauritius (1998–2010) |
| title_fullStr | Decline in coral cover and flattening of the reefs around Mauritius (1998–2010) |
| title_full_unstemmed | Decline in coral cover and flattening of the reefs around Mauritius (1998–2010) |
| title_short | Decline in coral cover and flattening of the reefs around Mauritius (1998–2010) |
| title_sort | decline in coral cover and flattening of the reefs around mauritius 1998 2010 |
| topic | Coral morphology Coral bleaching Coral reef monitoring nMDS Human impacts |
| url | https://peerj.com/articles/6014.pdf |
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