globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13968
Scopus记录号: 2-s2.0-85035219479
论文题名:
Extremely low genetic diversity across mangrove taxa reflects past sea level changes and hints at poor future responses
作者: Guo Z.; Li X.; He Z.; Yang Y.; Wang W.; Zhong C.; Greenberg A.J.; Wu C.-I.; Duke N.C.; Shi S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期:4
起始页码: 1741
结束页码: 1748
语种: 英语
英文关键词: dieback ; effective population size ; genetic diversity ; human disturbance ; mangroves ; sea level rise
Scopus关键词: biodiversity ; climate effect ; ecosystem resilience ; mangrove ; population size ; sea level change ; China ; Invertebrata ; Rhizophoraceae
英文摘要: The projected increases in sea levels are expected to affect coastal ecosystems. Tropical communities, anchored by mangrove trees and having experienced frequent past sea level changes, appear to be vibrant at present. However, any optimism about the resilience of these ecosystems is premature because the impact of past climate events may not be reflected in the current abundance. To assess the impact of historical sea level changes, we conducted an extensive genetic diversity survey on the Indo-Malayan coast, a hotspot with a large global mangrove distribution. A survey of 26 populations in six species reveals extremely low genome-wide nucleotide diversity and hence very small effective population sizes (Ne) in all populations. Whole-genome sequencing of three mangrove species further shows the decline in Neto be strongly associated with the speed of past changes in sea level. We also used a recent series of flooding events in Yalong Bay, southern China, to test the robustness of mangroves to sea level changes in relation to their genetic diversity. The events resulted in the death of half of the mangrove trees in this area. Significantly, less genetically diverse mangrove species suffered much greater destruction. The dieback was accompanied by a drastic reduction in local invertebrate biodiversity. We thus predict that tropical coastal communities will be seriously endangered as the global sea level rises. Well-planned coastal development near mangrove forests will be essential to avert this crisis. © 2017 John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110466
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: State Key Laboratory of Biocontrol, Guangdong Key Lab of Plant Resources, Key Laboratory of Biodiversity Dynamics and Conservation of Guangdong Higher Education Institutes, School of Life Science, Sun Yat-Sen University, Guangzhou, Guangdong, China; Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, College of the Environment & Ecology, Xiamen University, Xiamen, Fujian, China; Hainan Dongzhai Harbor National Nature Reserve, Haikou, Hainan, China; Bayesic Research, Ithaca, NY, United States; Trop WATER, James Cook University, Townsville, QLD, Australia

Recommended Citation:
Guo Z.,Li X.,He Z.,et al. Extremely low genetic diversity across mangrove taxa reflects past sea level changes and hints at poor future responses[J]. Global Change Biology,2018-01-01,24(4)
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