气候变化领域集成服务门户(CCPortal): Eroding islands of Gulf of Mannar, Southeast India: a consequence of long-term impact of coral mining and climate change

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DOI	10.1007/s11069-020-03961-6
	Eroding islands of Gulf of Mannar, Southeast India: a consequence of long-term impact of coral mining and climate change
	Asir N.G.G.; Kumar P.D.; Arasamuthu A.; Mathews G.; Raj K.D.; Kumar T.K.A.; Bilgi D.S.; Edward J.K.P.
发表日期	2020
ISSN	0921030X
起始页码	103
结束页码	119
卷号	103 期号:1
英文摘要	A study was undertaken to assess the morphological variations during the period 1969–2018 in the twenty-one islands in Gulf of Mannar, southeast India, using Survey of India Toposheet, Google Earth images and field survey techniques. The results show that two of the islands have eroded and submerged, fifteen islands area cover has reduced and four have their area expanded during the last 49 years. Overall, the Tuticorin group of islands has experienced the highest percentage of land cover reduction (78.55%), followed by Keelakarai (43.49%), Vembar (36.21%) and Mandapam (21.84%) groups. The exceptions are the four islands of the Mandapam group viz. Hare, Manoli, Krusadai and Shingle, whose area covers have increased (16.44%). A small change in the area of an island induces a greater change in its morphology. From the Island Change Ratio plot, it is observed that islands with an area cover of 10–30 ha have suffered loss of more area cover and undergone mobility from the core area. The constant changes undergone and the mobility exhibited by these islands clearly indicate that they are dynamic. The main factors that are responsible for the current changes in their extent and position are coral mining and sea level rise. Thus, it is clear that the low-lying reef islands of Gulf of Mannar are very dynamic, and that their expansion, loss in area cover and mobility are mainly controlled by coral mining and climate change. Immediate conservation action is necessary to prevent the islands from submergence. © 2020, Springer Nature B.V.
关键词	Coral mining Gulf of Mannar Island dynamics Low-lying reef islands Shoreline morphology Vulnerability
英文关键词	anthropogenic effect; climate change; coastal erosion; coastal morphology; coral; field survey; island; Gulf of Mannar; Indian Ocean; Anthozoa
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/205588
作者单位	Suganthi Devadason Marine Research Institute, 44-Beach Road, Tuticorin, 628 001, India; Gulf of Mannar Marine National Park, Ramanathapuram, 623 503, India; Hosur forest Division, Mathigiri Post, Hosur, 635 110, India
推荐引用方式 GB/T 7714	Asir N.G.G.,Kumar P.D.,Arasamuthu A.,et al. Eroding islands of Gulf of Mannar, Southeast India: a consequence of long-term impact of coral mining and climate change[J],2020,103(1).
APA	Asir N.G.G..,Kumar P.D..,Arasamuthu A..,Mathews G..,Raj K.D..,...&Edward J.K.P..(2020).Eroding islands of Gulf of Mannar, Southeast India: a consequence of long-term impact of coral mining and climate change.Natural Hazards,103(1).
MLA	Asir N.G.G.,et al."Eroding islands of Gulf of Mannar, Southeast India: a consequence of long-term impact of coral mining and climate change".Natural Hazards 103.1(2020).