Diversity of Three Small Type’s Giant Clams and Their Associated Endosymbiotic Symbiodiniaceae at Hainan and Xisha Islands, South China Sea

Giant clams are found in a mutualistic association with Symbiodiniaceae dinoflagellates, however, the diversity of the giant clams, as well as the diversity and distribution of Symbiodiniaceae in different Tridacnine species remain relatively poorly studied in the South China Sea. In this study, a t...

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Autores principales:	Qiqi Chao, Zhifeng Gu, Aimin Wang, Chunsheng Liu, Yi Yang
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	Tridacna Symbiodiniaceae symbiont COI 16S rRNA ITS1 Science Q General. Including nature conservation, geographical distribution QH1-199.5
Acceso en línea:	https://doaj.org/article/147e3fbe033d403ba275459684c8b120
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spelling	oai:doaj.org-article:147e3fbe033d403ba275459684c8b1202021-11-11T09:07:14ZDiversity of Three Small Type’s Giant Clams and Their Associated Endosymbiotic Symbiodiniaceae at Hainan and Xisha Islands, South China Sea2296-774510.3389/fmars.2021.774925https://doaj.org/article/147e3fbe033d403ba275459684c8b1202021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmars.2021.774925/fullhttps://doaj.org/toc/2296-7745Giant clams are found in a mutualistic association with Symbiodiniaceae dinoflagellates, however, the diversity of the giant clams, as well as the diversity and distribution of Symbiodiniaceae in different Tridacnine species remain relatively poorly studied in the South China Sea. In this study, a total of 100 giant clams belonging to small type’s giant clams, Tridacna maxima, T. crocea, and T. noae, were collected from Hainan and Xisha Islands. Based on mtDNA cytochrome c oxidase subunit 1 gene (COI) and 16S rRNA fragments, T. maxima and T. crocea showed a closer phylogenetic relationship than T. noae. All the three species of giant clams hosted Symbiodiniaceae including genera Symbiodinium (formerly Clade A) and Cladocopium (formerly Clade C). Geographically, symbionts in Cladocopium are restricted to Xisha Islands, probably because Cladocopium prefers to inhabit in waters with higher mean temperatures. The endosymbiont specificity among the three giant clam species was also detected. T. noae and T. crocea are found to harbor Symbiodinium preferentially, compared with Cladocopium. These results could provide important information to understand various endosymbionts occurring in giant clams in the South China Sea.Qiqi ChaoQiqi ChaoZhifeng GuZhifeng GuAimin WangAimin WangChunsheng LiuChunsheng LiuYi YangYi YangFrontiers Media S.A.articleTridacnaSymbiodiniaceaesymbiontCOI16S rRNAITS1ScienceQGeneral. Including nature conservation, geographical distributionQH1-199.5ENFrontiers in Marine Science, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Tridacna Symbiodiniaceae symbiont COI 16S rRNA ITS1 Science Q General. Including nature conservation, geographical distribution QH1-199.5
spellingShingle	Tridacna Symbiodiniaceae symbiont COI 16S rRNA ITS1 Science Q General. Including nature conservation, geographical distribution QH1-199.5 Qiqi Chao Qiqi Chao Zhifeng Gu Zhifeng Gu Aimin Wang Aimin Wang Chunsheng Liu Chunsheng Liu Yi Yang Yi Yang Diversity of Three Small Type’s Giant Clams and Their Associated Endosymbiotic Symbiodiniaceae at Hainan and Xisha Islands, South China Sea
description	Giant clams are found in a mutualistic association with Symbiodiniaceae dinoflagellates, however, the diversity of the giant clams, as well as the diversity and distribution of Symbiodiniaceae in different Tridacnine species remain relatively poorly studied in the South China Sea. In this study, a total of 100 giant clams belonging to small type’s giant clams, Tridacna maxima, T. crocea, and T. noae, were collected from Hainan and Xisha Islands. Based on mtDNA cytochrome c oxidase subunit 1 gene (COI) and 16S rRNA fragments, T. maxima and T. crocea showed a closer phylogenetic relationship than T. noae. All the three species of giant clams hosted Symbiodiniaceae including genera Symbiodinium (formerly Clade A) and Cladocopium (formerly Clade C). Geographically, symbionts in Cladocopium are restricted to Xisha Islands, probably because Cladocopium prefers to inhabit in waters with higher mean temperatures. The endosymbiont specificity among the three giant clam species was also detected. T. noae and T. crocea are found to harbor Symbiodinium preferentially, compared with Cladocopium. These results could provide important information to understand various endosymbionts occurring in giant clams in the South China Sea.
format	article
author	Qiqi Chao Qiqi Chao Zhifeng Gu Zhifeng Gu Aimin Wang Aimin Wang Chunsheng Liu Chunsheng Liu Yi Yang Yi Yang
author_facet	Qiqi Chao Qiqi Chao Zhifeng Gu Zhifeng Gu Aimin Wang Aimin Wang Chunsheng Liu Chunsheng Liu Yi Yang Yi Yang
author_sort	Qiqi Chao
title	Diversity of Three Small Type’s Giant Clams and Their Associated Endosymbiotic Symbiodiniaceae at Hainan and Xisha Islands, South China Sea
title_short	Diversity of Three Small Type’s Giant Clams and Their Associated Endosymbiotic Symbiodiniaceae at Hainan and Xisha Islands, South China Sea
title_full	Diversity of Three Small Type’s Giant Clams and Their Associated Endosymbiotic Symbiodiniaceae at Hainan and Xisha Islands, South China Sea
title_fullStr	Diversity of Three Small Type’s Giant Clams and Their Associated Endosymbiotic Symbiodiniaceae at Hainan and Xisha Islands, South China Sea
title_full_unstemmed	Diversity of Three Small Type’s Giant Clams and Their Associated Endosymbiotic Symbiodiniaceae at Hainan and Xisha Islands, South China Sea
title_sort	diversity of three small type’s giant clams and their associated endosymbiotic symbiodiniaceae at hainan and xisha islands, south china sea
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/147e3fbe033d403ba275459684c8b120
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Diversity of Three Small Type’s Giant Clams and Their Associated Endosymbiotic Symbiodiniaceae at Hainan and Xisha Islands, South China Sea

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