Extensive cryptic diversity of giant clams (Cardiidae: Tridacninae) revealed by DNA-sequence-based species delimitation approaches with new data from Hainan Island, South China Sea

doi:10.1093/mollus/eyz033

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海生物学研究室 > 海洋生物生态与进化研究组

	Extensive cryptic diversity of giant clams (Cardiidae: Tridacninae) revealed by DNA-sequence-based species delimitation approaches with new data from Hainan Island, South China Sea
	Liu, Jun; Cui, Dan; Wang, Hui; Chen, Jiawei; Liu, Helu; Zhang, Haibin
刊名	JOURNAL OF MOLLUSCAN STUDIES
	2020-02-01
卷号	86 页码:56-63
ISSN号	0260-1230
DOI	10.1093/mollus/eyz033
英文摘要	Accurate species delimitation is important, especially for endangered species. As one of the most conspicuous bivalve taxa, giant clams are threatened throughout their geographic range. Many phylogeographic studies have revealed strong population structure among giant clams in the Indo-Pacific, suggesting cryptic diversity within these species. However, less attention has been paid to their identification and delimitation. In this study, we assembled a comprehensive dataset of mitochondrial cytochrome c oxidase subunit I (COI) sequences for Tridacna species, focusing on new sequences from Hainan Island in the South China Sea and previously published ones from Japan, Taiwan, Singapore, the Philippines, Indonesia, Australia, the Solomon Islands and the Red Sea. Three nominal species, Tridacna crocea, T squamosa and T noae, were recognized at Hainan Island on the basis of distance-based DNA barcoding, with mean interspecific K2P distances of 10.6-24.7% for seven Tridacna species (T crocea, T squamosa, T. noae, T maxima, T mbalavuana, T derasa and T gigas). The most abundant species, T. noae, represents the first record of this species from Hainan Island. Using a combination of phylogenetic and DNA-based species delimitation analyses (automatic barcode gap discovery, generalized mixed Yule coalescent and Bayesian Poisson tree processes), we found strong support for a total of 13 operational taxonomic units (OTUs) for the seven nominal Tridacna species. These results, coupled with the fact that each OTU occupies different regions in the Indo-Pacific, strongly suggest multiple cryptic species of giant clams. Our findings point to the need for taxonomic revisionary work on giant clams throughout the Indo-Pacific; such work will have important conservation implications.
资助项目	major scientific and technological projects of Hainan Province[ZDKJ2016009] ; Knowledge Innovation Program of CAS[SIDSSE-201401] ; Hundred Talents Programme of CAS[SIDSSE-BR-201401] ; Natural Science Foundation of Hainan[20164176] ; Cooperation projects of CAS[2015YD46] ; Sanya local government[2015YD46] ; National Natural Science Foundation of China[41606152]
WOS关键词	GENETIC POPULATION-STRUCTURE ; WEST PACIFIC ; IDENTIFICATION ; MITOCHONDRIAL ; CONNECTIVITY ; DIVERGENCE ; DISPERSAL ; DISCOVERY ; TAXONOMY
WOS研究方向	Marine & Freshwater Biology ; Zoology
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000532253200005
资助机构	major scientific and technological projects of Hainan Province ; Knowledge Innovation Program of CAS ; Hundred Talents Programme of CAS ; Natural Science Foundation of Hainan ; Cooperation projects of CAS ; Sanya local government ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/7585]
专题	深海科学研究部_深海生物学研究室_海洋生物生态与进化研究组
通讯作者	Zhang, Haibin
作者单位	Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jun,Cui, Dan,Wang, Hui,et al. Extensive cryptic diversity of giant clams (Cardiidae: Tridacninae) revealed by DNA-sequence-based species delimitation approaches with new data from Hainan Island, South China Sea[J]. JOURNAL OF MOLLUSCAN STUDIES,2020,86:56-63.
APA	Liu, Jun,Cui, Dan,Wang, Hui,Chen, Jiawei,Liu, Helu,&Zhang, Haibin.(2020).Extensive cryptic diversity of giant clams (Cardiidae: Tridacninae) revealed by DNA-sequence-based species delimitation approaches with new data from Hainan Island, South China Sea.JOURNAL OF MOLLUSCAN STUDIES,86,56-63.
MLA	Liu, Jun,et al."Extensive cryptic diversity of giant clams (Cardiidae: Tridacninae) revealed by DNA-sequence-based species delimitation approaches with new data from Hainan Island, South China Sea".JOURNAL OF MOLLUSCAN STUDIES 86(2020):56-63.