文章摘要
四种常见经济滤食性贝类生理活动对球等鞭金藻产生二甲基硫化物的影响*
Effects of physiological activities by four common economic bivalves on the production of dimethyl sulfur compounds from Isochrysis galbana
投稿时间:2020-03-27  修订日期:2020-05-08
DOI:
中文关键词: 滤食性贝类  生理活动  浮游植物  二甲基硫化物
英文关键词: Filter-feeding bivalve  Physiological activity  Phytoplankton  Dimethyl sulfur compound
基金项目:
作者单位E-mail
侯兴 上海海洋大学水产与生命学院 上海
中国水产科学研究院黄海水产研究所农业农村部海洋渔业可持续发展重点实验室 青岛 
houxing_up@163.com 
王颖 山东省海洋生物研究院  
刘天红 山东省海洋生物研究院  
杜美荣 中国水产科学研究院黄海水产研究所农业农村部海洋渔业可持续发展重点实验室 青岛  
高亚平 中国水产科学研究院黄海水产研究所农业农村部海洋渔业可持续发展重点实验室 青岛  
姜娓娓 中国水产科学研究院黄海水产研究所农业农村部海洋渔业可持续发展重点实验室 青岛  
李凤雪 中国水产科学研究院黄海水产研究所农业农村部海洋渔业可持续发展重点实验室 青岛  
董世鹏 上海海洋大学水产与生命学院 上海
中国水产科学研究院黄海水产研究所农业农村部海洋渔业可持续发展重点实验室 青岛 
 
李文豪 上海海洋大学水产与生命学院 上海
中国水产科学研究院黄海水产研究所农业农村部海洋渔业可持续发展重点实验室 青岛 
 
蒋增杰 中国水产科学研究院黄海水产研究所农业农村部海洋渔业可持续发展重点实验室 青岛 jiangzj@ysfri.ac.cn 
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中文摘要:
      二甲基硫(DMS)是海洋中重要的生源硫化物,能够缓解全球气候变暖,其前体物质二甲基巯基丙酸(DMSP)主要存在于浮游植物中,滤食性贝类生理活动对浮游植物二甲基硫化物的产生具有潜在影响。本研究以紫贻贝、长牡蛎、栉孔扇贝、菲律宾蛤仔四种常见经济滤食性贝类作为研究对象,选用DMSP含量较高的球等鞭金藻Isochrysis galbana作为实验藻种,室内模拟条件下探讨了静水、扰动两种条件下水体中DMS(P)的变化。结果表明,静水条件下,四种贝类的摄食作用对微藻DMS的释放没有明显的促进作用(P>0.05),但通过生物沉积作用显著降低了DMSPp含量,其中约40%摄入的DMSPp转化为粪便DMSP(DMSPf)。扰动条件发现,DMSPf会随水体扰动而扩散于水体中,进而增加水体中DMSPt和DMS的量,原水总水体扰动实验中,相比对照组(0 rpm),实验组DMS和DMSPt最大分别增加了16.8%和38.5倍。定量粪便扰动的实验发现,在装有定量粪便的去DMS海水中,随着扰动程度增加,DMS和DMSPt增加,从静置状态下的7.6 nmol/L和906.4 nmol/L最大升高到21.3nmol/L和2505.9 nmol/L,分别增加了180%和174%。研究结果为深入认识贝类生理活动对海洋硫循环的影响提供了数据支撑。
英文摘要:
      Dimethyl sulfide (DMS) is an important biological sulfide in the ocean which can alleviate global warming. Dimethylsulfoniopropionate (DMSP) is the precursor of DMS and mainly exists in phytoplankton. The physiological activities of filter feeding bivalve on phytoplankton have potential effects on the production of dimethyl sulfide. In this study, four kinds of common economic filter-feeding bivalves include pacific oyster Crassostrea gigas, blue mussel Mytilus edulis, zhikong scallop Chlamys farreri and manila clam Ruditapes philippinarum and microalgae Isochrysis galbana with higher DMSP content were selected as the experiment organism. The variations of DMS(P) in water body under the condition of static water and disturbance are discussed. Results showed that the production of DMS was not significantly affected by the feeding activity of all kinds of bivalve (P < 0.05) under the static condition, but which ~40% of the DMSPp intake was converted into fecal DMSP(DMSPf) due to biodeposition. DMSPf would diffuse into the water under the disturbance condition and increase the amount of DMSPt and DMS in the water correspondingly. The disturbance experiment on original waterrevealed that the DMS and DMSPt in the treatment group increased by 16.8% and 38.5 times respectively compared with the control group (0 rpm). The experiment of quantitative fecal disturbance found that followed with the enhancement of disturbance, DMS and DMSPt increased from 7.6 nmol/L and 906.4 nmol/L under the static condition to a maximum of 21.3 nmol/L and 2505.9 nmol/L, which increased by 180% and 174% respectively. These findings provided data support to better understand the impact of shellfish physiological activities on the marine sulfur cycle.
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