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Ecology of Mid-Atlantic Ridge Hydrothermal Vents: Food Web Analysis Using Multiple Molecular and Isotopic Techniques

大西洋中脊热液喷口的生态学：使用多分子和同位素技术进行食物网分析

基本信息

批准号：
9215327
负责人：
Cindy Van Dover
金额：
$ 18.14万
依托单位：
Woods Hole Oceanographic Institution
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1993
资助国家：
美国
起止时间：
1993-01-01 至 1995-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9215327&HistoricalAwards=false
关键词：
Ecology Mid Atlantic Ridge Hydrothermal

项目摘要

While non-photosynthetic sources of organic carbon have been implicated as the primary energy source fueling invertebrate populations at deep-sea hydrothermal vents, details of carbon transfer have not been elucidated for an entire community. Multiple paths for transfer of carbon exist, and dominance by one or another path varies dramatically at geographically disjunct sites. Mid-Atlantic Ridge vent communities are striking in their apparent dependence on free-living primary production associated with sulfide surfaces to support large and metabolically active populations of shrimp. This research will use the TAG site on the Mid- Atlantic Ridge for a case-study of carbon transfer within a vent community. Dr. Van Dover and colleagues will identify the major trophic links, with particular emphasis on 1) testing alternative hypotheses regarding the source of food for shrimp and 2) determination of the spatial isotopic, taxonomic and biomass heterogeneity of basal dietary pools, the degree of specificity of consumers to these pools, and the strength of interactions between consumers. To accomplish these tasks, they will employ molecular and isotopic techniques to define distinctive basal dietary pools and to trace the paths of these pools through the food web. The field program will be designed to relate spatial heterogeneity to microhabitat characteristics as defined by temperature, mineralogical assays and macrofaunal assays and distributions.

而非光合作用的有机碳来源被作为主要能源，无脊椎深海热液喷口的生物种群，碳转移尚未阐明整个社区存在多种碳转移途径，由一个或者另一条道路在地理上间断网站. 中大西洋海岭喷口群落在他们的对自由生活的初级生产的明显依赖关联表面有硫化物，活性虾的种群。这项研究将使用TAG网站上的中期- 大西洋岭内碳转移的案例研究通气社区货车多佛博士及其同事将鉴定主要营养链，特别强调1）测试替代关于虾类食物来源的假说和2）空间同位素的确定，分类和生物质基础膳食库的异质性，特异性消费者对这些池，和实力，相互作用消费者之间。为了完成这些任务，他们将采用分子和同位素技术来确定基底并追踪这些食物池的路径，的食物网现场项目将被设计为空间微生境特征的异质性，定义温度、矿物学分析和大型底栖动物分析和分布。