Regional hard coral distribution within geomorphic and reef flat ecological zones determined by satellite imagery of the Xisha Islands, South China Sea

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 中科院边缘海地质重点实验室

	Regional hard coral distribution within geomorphic and reef flat ecological zones determined by satellite imagery of the Xisha Islands, South China Sea
	Zuo, XL; Su, FZ; Zhao, HT; Zhang, JJ; Wang, Q; Wu, D; sufz@lreis.ac.cn
刊名	CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
	2017
卷号	35 期号:3 页码:501-514
关键词	Coral Reef Geomorphic Zone Remote Sensing Xisha Islands South China Sea
英文摘要	Coral reefs in the Xisha Islands (also known as the Paracel Islands in English), South China Sea, have experienced dramatic declines in coral cover. However, the current regional scale hard coral distribution of geomorphic and ecological zones, essential for reefs management in the context of global warming and ocean acidification, is not well documented. We analyzed data from field surveys, Landsat-8 and GF-1 images to map the distribution of hard coral within geomorphic zones and reef flat ecological zones. In situ surveys conducted in June 2014 on nine reefs provided a complete picture of reef status with regard to live coral diversity, evenness of coral cover and reef health (live versus dead cover) for the Xisha Islands. Mean coral cover was 12.5% in 2014 and damaged reefs seemed to show signs of recovery. Coral cover in sheltered habitats such as lagoon patch reefs and biotic dense zones of reef flats was higher, but there were large regional differences and low diversity. In contrast, the more exposed reef slopes had high coral diversity, along with high and more equal distributions of coral cover. Mean hard coral cover of other zones was < 10%. The total Xisha reef system was estimated to cover 1 060 km(2), and the emergent reefs covered similar to 787 m(2). Hard corals of emergent reefs were considered to cover 97 km(2). The biotic dense zone of the reef flat was a very common zone on all simple atolls, especially the broader northern reef flats. The total cover of live and dead coral can reach above 70% in this zone, showing an equilibrium between live and dead coral as opposed to coral and algae. This information regarding the spatial distribution of hard coral can support and inform the management of Xisha reef ecosystems.
资助项目	MSG
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/16488]
专题	南海海洋研究所_中科院边缘海地质重点实验室
通讯作者	sufz@lreis.ac.cn
推荐引用方式 GB/T 7714	Zuo, XL,Su, FZ,Zhao, HT,et al. Regional hard coral distribution within geomorphic and reef flat ecological zones determined by satellite imagery of the Xisha Islands, South China Sea[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2017,35(3):501-514.
APA	Zuo, XL.,Su, FZ.,Zhao, HT.,Zhang, JJ.,Wang, Q.,...&sufz@lreis.ac.cn.(2017).Regional hard coral distribution within geomorphic and reef flat ecological zones determined by satellite imagery of the Xisha Islands, South China Sea.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,35(3),501-514.
MLA	Zuo, XL,et al."Regional hard coral distribution within geomorphic and reef flat ecological zones determined by satellite imagery of the Xisha Islands, South China Sea".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 35.3(2017):501-514.