Responses of attached bacterial communities to blooms of the swimming shelled pteropod Creseis acicula in Daya Bay, southern China
文献类型： 外文期刊
作者： Shi, Rongjun 1 ; Han, Tingting 1 ; Qi, Zhanhui 1 ; Huang, Honghui 1 ;
作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangdong Prov Key Lab Fishery Ecol & Environm, Key Lab Open Sea Fishery Dev,Minist Agr & Rural Af, Guangzhou 510300, Peoples R China
2.Southern Marine Sci & Engn Guangdong Lab Guangzhou, Guangzhou 511458, Peoples R China
3.South China Sea Fisheries Res Inst, 231 West Xingang Rd, Guangzhou 510300, Guangdong, Peoples R China
关键词： bloom; bloom-sensitive particle-attached bacteria; Creseis acicula; free-living bacteria; particle-attached bacteria
期刊名称：FEMS MICROBIOLOGY ECOLOGY （ 影响因子：4.2； 五年影响因子：5.0 ）
ISSN： 0168-6496
年卷期： 2024 年 100 卷 6 期
页码：
收录情况： SCI
摘要： The shelled pteropod Creseis acicula is a marine pelagic shellfish widely distributed from temperate to tropical seas around the world. From June to July 2020, a C. acicula bloom first happened in the Daya Bay, southern China, and its density reached the highest value (5600 ind. m-3) ever recorded around the world. However, few studies have investigated the responses of bacterial communities to the C. acicula bloom. In the present study, we examined the community profiles of three communities of bacteria including the free-living and particle-attached bacteria in the blooming and reference waters, and bacteria attached to the whole body and shell of C. acicula using a high-throughput sequencing method. The results indicated that the C. acicula bloom had a greater impact on particle-attached bacteria than free-living bacteria. Among the bloom-sensitive particle-attached bacteria, the predominant bacterial phyla were Pseudomonadota, Bacteroidota and Verrucomicrobiota in the blooming areas, whereas they were Actinomycetota and Planctomycetota in the reference areas. Specifically, fecal bacteria Haloferula and Halioglobus spp. were significantly enriched in the blooming waters and accumulated on C. acicula shells. Conversely, the significantly lower relative abundance of Nocardioides sp. in the blooming area and accumulated on the whole body of C. acicula indicated their attachment to particles consumed by C. acicula. Overall, our results suggested that the C. acicula bloom influenced marine bacteria, particularly particle-attached bacteria, by increasing (e.g. providing shells and feces) or decreasing (e.g. filter-feeding the suspended particles) the abundance of available substances. A bloom of Creseis acicula exerted both direct and indirect effects on bacterial communities through filter feeding, respiration, metabolite release, excretion and decomposition, impacting particle-attached bacteria more than free-living bacteria.
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