Disturbance and the dynamics of coral cover on the Great Barrier Reef (1995-2009).

Coral reef ecosystems worldwide are under pressure from chronic and acute stressors that threaten their continued existence. Most obvious among changes to reefs is loss of hard coral cover, but a precise multi-scale estimate of coral cover dynamics for the Great Barrier Reef (GBR) is currently lacki...

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Autores principales:	Kate Osborne, Andrew M Dolman, Scott C Burgess, Kerryn A Johns
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a8ef60a6a5f04f15a7f0681e00c29c14
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spelling	oai:doaj.org-article:a8ef60a6a5f04f15a7f0681e00c29c142021-11-18T06:57:29ZDisturbance and the dynamics of coral cover on the Great Barrier Reef (1995-2009).1932-620310.1371/journal.pone.0017516https://doaj.org/article/a8ef60a6a5f04f15a7f0681e00c29c142011-03-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21423742/?tool=EBIhttps://doaj.org/toc/1932-6203Coral reef ecosystems worldwide are under pressure from chronic and acute stressors that threaten their continued existence. Most obvious among changes to reefs is loss of hard coral cover, but a precise multi-scale estimate of coral cover dynamics for the Great Barrier Reef (GBR) is currently lacking. Monitoring data collected annually from fixed sites at 47 reefs across 1300 km of the GBR indicate that overall regional coral cover was stable (averaging 29% and ranging from 23% to 33% cover across years) with no net decline between 1995 and 2009. Subregional trends (10-100 km) in hard coral were diverse with some being very dynamic and others changing little. Coral cover increased in six subregions and decreased in seven subregions. Persistent decline of corals occurred in one subregion for hard coral and Acroporidae and in four subregions in non-Acroporidae families. Change in Acroporidae accounted for 68% of change in hard coral. Crown-of-thorns starfish (Acanthaster planci) outbreaks and storm damage were responsible for more coral loss during this period than either bleaching or disease despite two mass bleaching events and an increase in the incidence of coral disease. While the limited data for the GBR prior to the 1980's suggests that coral cover was higher than in our survey, we found no evidence of consistent, system-wide decline in coral cover since 1995. Instead, fluctuations in coral cover at subregional scales (10-100 km), driven mostly by changes in fast-growing Acroporidae, occurred as a result of localized disturbance events and subsequent recovery.Kate OsborneAndrew M DolmanScott C BurgessKerryn A JohnsPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 3, p e17516 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kate Osborne Andrew M Dolman Scott C Burgess Kerryn A Johns Disturbance and the dynamics of coral cover on the Great Barrier Reef (1995-2009).
description	Coral reef ecosystems worldwide are under pressure from chronic and acute stressors that threaten their continued existence. Most obvious among changes to reefs is loss of hard coral cover, but a precise multi-scale estimate of coral cover dynamics for the Great Barrier Reef (GBR) is currently lacking. Monitoring data collected annually from fixed sites at 47 reefs across 1300 km of the GBR indicate that overall regional coral cover was stable (averaging 29% and ranging from 23% to 33% cover across years) with no net decline between 1995 and 2009. Subregional trends (10-100 km) in hard coral were diverse with some being very dynamic and others changing little. Coral cover increased in six subregions and decreased in seven subregions. Persistent decline of corals occurred in one subregion for hard coral and Acroporidae and in four subregions in non-Acroporidae families. Change in Acroporidae accounted for 68% of change in hard coral. Crown-of-thorns starfish (Acanthaster planci) outbreaks and storm damage were responsible for more coral loss during this period than either bleaching or disease despite two mass bleaching events and an increase in the incidence of coral disease. While the limited data for the GBR prior to the 1980's suggests that coral cover was higher than in our survey, we found no evidence of consistent, system-wide decline in coral cover since 1995. Instead, fluctuations in coral cover at subregional scales (10-100 km), driven mostly by changes in fast-growing Acroporidae, occurred as a result of localized disturbance events and subsequent recovery.
format	article
author	Kate Osborne Andrew M Dolman Scott C Burgess Kerryn A Johns
author_facet	Kate Osborne Andrew M Dolman Scott C Burgess Kerryn A Johns
author_sort	Kate Osborne
title	Disturbance and the dynamics of coral cover on the Great Barrier Reef (1995-2009).
title_short	Disturbance and the dynamics of coral cover on the Great Barrier Reef (1995-2009).
title_full	Disturbance and the dynamics of coral cover on the Great Barrier Reef (1995-2009).
title_fullStr	Disturbance and the dynamics of coral cover on the Great Barrier Reef (1995-2009).
title_full_unstemmed	Disturbance and the dynamics of coral cover on the Great Barrier Reef (1995-2009).
title_sort	disturbance and the dynamics of coral cover on the great barrier reef (1995-2009).
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/a8ef60a6a5f04f15a7f0681e00c29c14
work_keys_str_mv	AT kateosborne disturbanceandthedynamicsofcoralcoveronthegreatbarrierreef19952009 AT andrewmdolman disturbanceandthedynamicsofcoralcoveronthegreatbarrierreef19952009 AT scottcburgess disturbanceandthedynamicsofcoralcoveronthegreatbarrierreef19952009 AT kerrynajohns disturbanceandthedynamicsofcoralcoveronthegreatbarrierreef19952009
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Disturbance and the dynamics of coral cover on the Great Barrier Reef (1995-2009).

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