gill symbiont of alvinocaridid shrimps16S rRNA gene

Shrimps of the family Alvinocarididae with ectosymbionts in gills are endemic species to deep sea chemosynthetic ecosystems. Among them, Alvinocaris longirostris and Shinkaicaris leurokolos occupy different ecological niches within the same hydrothermal vent in Okinawa Trough, of which A. longirostris inhabits on mussel beds surrounding the base of hydrothermal vents (ALHV), while S. leurokolos lives tightly close to the vent (SLHV). In addition, A. longirostris also exists in a methane seep of the South China Sea (ALMS). In this study, full-length 16S rRNA sequences of the gill symbionts of two alvinocaridid species from different chemosynthetically ecological niches were first captured by single-molecule real-time sequencing.

鳃部携带有外共生体的阿尔文虾科（Alvinocarididae）虾类，是深海化能合成生态系统的特有物种。其中，长额阿尔文对虾（Alvinocaris longirostris）和平滑新卡虾（Shinkaicaris leurokolos）在冲绳海槽的同一热液喷口内占据不同生态位：长额阿尔文对虾栖息于热液喷口基底周边的贻贝床（ALHV），而平滑新卡虾则紧贴喷口生活（SLHV）。此外，长额阿尔文对虾还见于南海的甲烷冷泉生境（ALMS）。本研究首次通过单分子实时测序技术，获取了来自不同化能合成生态位的两种阿尔文虾科物种的鳃部共生体全长16S rRNA序列。