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Title: The different fates of two Asian horseshoe crab species with different dispersal abilities
Authors: Tang, Qian 
Shingate, Prashant
Wardiatno, Yusli
John, Akbar
Boon Hui Tay
Tay, Ywee Chieh 
Yap, Laura-Marie
Lim, Jasmin
Tong, Hor Yee
Tun, Karenne
Venkatesh, Byrappa 
Rheindt, Frank E. 
Keywords: benthic dispersal
climate change
conservation genomics
demographic reconstruction
seascape genomics
Sunda shelf
Issue Date: 23-Jul-2021
Publisher: John Wiley and Sons Inc
Citation: Tang, Qian, Shingate, Prashant, Wardiatno, Yusli, John, Akbar, Boon Hui Tay, Tay, Ywee Chieh, Yap, Laura-Marie, Lim, Jasmin, Tong, Hor Yee, Tun, Karenne, Venkatesh, Byrappa, Rheindt, Frank E. (2021-07-23). The different fates of two Asian horseshoe crab species with different dispersal abilities. Evolutionary Applications 14 (8) : 2124-2133. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Impending anthropogenic climate change will severely impact coastal organisms at unprecedented speed. Knowledge on organisms’ evolutionary responses to past sea-level fluctuations and estimation of their evolutionary potential is therefore indispensable in efforts to mitigate the effects of future climate change. We sampled tens of thousands of genomic markers of ~300 individuals in two of the four extant horseshoe crab species across the complex archipelagic Singapore Straits. Carcinoscorpius rotundicauda Latreille, a less mobile mangrove species, has finer population structure and lower genetic diversity compared with the dispersive deep-sea Tachypleus gigas Müller. Even though the source populations of both species during the last glacial maximum exhibited comparable effective population sizes, the less dispersive C. rotundicauda seems to lose genetic diversity much more quickly because of population fragmentation. Contra previous studies’ results, we predict that the more commonly sighted C. rotundicauda faces a more uncertain conservation plight, with a continuing loss in evolutionary potential and higher vulnerability to future climate change. Our study provides important genomic baseline data for the redirection of conservation measures in the face of climate change and can be used as a blueprint for assessment and mitigation of the adverse effects of impending sea-level rise in other systems. © 2021 The Authors. Evolutionary Applications published by John Wiley & Sons Ltd.
Source Title: Evolutionary Applications
ISSN: 1752-4563
DOI: 10.1111/eva.13271
Rights: Attribution 4.0 International
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