Chemical environment of the hydrothermal mussel communities in the Lucky Strike and Menez Gwen vent fields, Mid Atlantic Ridge
Chemical environment of the hydrothermal mussel communities in the Lucky Strike and Menez Gwen vent fields, Mid Atlantic Ridge
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大西洋中脊 Lucky Strike 和 Menez Gwen 喷口区热液贻贝群落的化学环境
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
A. Aminot
中科院分区：
文献类型：
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作者：
P. Sarradin;J. Caprais;R. Riso;R. Kérouel;A. Aminot
在大西洋中脊的Lucky Strike(1700 m深度)和Menez Gwen(850 m深度)地区采集了热液贻贝Bathymonolus sp.的水样，并对其化学成分进行了分析。生物体周围的环境是海水(88%~100%)与热液混合，pH在6.2~8之间，西格玛·S(H_2S+HS-)浓度在0~62亩摩尔·L(-1)之间。高溶解有机碳(DOC)浓度意味着高生产力的生态系统。有机体附近的铵和狗的生产、硝酸盐和硫化物的消费是与当地生物活动有关的环境变化之一。铜和铅的浓度很高，这意味着生物需要有有效的适应策略。对贻贝极端大小(6 cm和3 cm)的经验区分表明，群落的大小分布与不同环境的存在有关：大尺寸类比小尺寸类更靠近流体出口，Sigma S浓度较高。这可能表明与能源可获得性、对能源和空间的竞争和/或不同的安置期有关的增长率存在差异。
Water samples were collected around the communities of a hydrothermal mussel, Bathymodiolus sp., in the Lucky Strike (1700 m depth) and Menez Gwen (850 m depth) areas, Mid Atlantic Ridge, and analysed for chemical constituents. The environment surrounding the organisms consists in sea water (88 to 100%) mixed with hydrothermal fluid with pH between 6.2 and 8, Sigma S (H2S + HS-) concentrations from 0 to 62 mu mol l(-1). High dissolved organic carbon (DOC) concentrations suggest a highly productive ecosystem. Production of ammonium and DOG, consumption of nitrate and sulfide in the vicinity of the organisms are among the environmental changes found in relation with local biological activity. Concentrations of Cu and Pb were high, implying that the organisms need to have efficient strategies of adaptation. An empirical distinction between the extreme sizes of the mussels ( 6 cm and 3 cm) reveals that the size distribution of the communities is related to the presence of different environments: the large size classes are present closer to the fluid exits, with higher Sigma S concentrations, than the small size classes. This could indicate differences in the growth rate related to the availability of the energy sources, competition for energy and space, and/or different settlement periods.