MULTIPLE TROPHIC RESOURCES FOR A CHEMOAUTOTROPHIC COMMUNITY AT A COLD WATER BRINE SEEP AT THE BASE OF THE FLORIDA ESCARPMENT
MULTIPLE TROPHIC RESOURCES FOR A CHEMOAUTOTROPHIC COMMUNITY AT A COLD WATER BRINE SEEP AT THE BASE OF THE FLORIDA ESCARPMENT
复制标题
DOI：
10.1007/bf00391157
复制
发表时间：
1989-01-01
期刊：
影响因子：
2.4
通讯作者：
VETTER, RD
中科院分区：
文献类型：
--
作者：
CARY, C;FRY, B;VETTER, RD
围绕着佛罗里达陡崖底部高盐度冷水卤水渗漏的生物群落主要由两种大型底栖动物物种组成：一种未描述的贻贝科双壳类和一种vestimentiferan蠕虫，Escarpia laminata。这些动物显然通过细菌内共生体的碳的化能自养固定来支持。水柱和沉积物数据表明，动物周围的表层沉积物中存在高水平的硫化物和甲烷，但上覆的沃茨中没有。孔隙水的稳定同位素分析表明，有两个来源的硫化物：第一个是从悬崖底部的地下水浸出携带的地热硫化物，第二个是微生物硫化物原位产生。vestimentiferan E. laminata和mytilid双壳贝类（seep贻贝）生活连续，但依赖于不同的底物进行化学自养。酶活性测定、元素硫储存模式和稳定同位素分析表明，E. laminata依赖于硫化物氧化，而seep贻贝依赖于甲烷氧化来生长。
The biological community that surrounds the hypersaline cold water brine seeps at the base of the Florida Escarpment is dominated by two macrofaunal species: an undescribed bivalve of the family Mytilidae and a vestimentiferan worm, Escarpia laminata. These animals are apparently supported by the chemoautotrophic fixation of carbon via bacterial endosymbionts. Water column and sediment data indicate that high levels of both sulfide and methane are present in surface sediments around the animals but absent from overlying waters. Stable isotopic analyses of pore water indicate that there are two sources of sulfide: the first is geothermal sulfide carried in groundwater leaching from the base of the escarpment, and the second is microbial sulfide produced in situ. The vestimentiferan E. laminata, and the mytilid bivalve (seep mussel) live contiguously but rely on different substrates for chemoautotrophy. Enzyme assays, patterns of elemental sulfur storage and stable isotopic analyses indicate that E. laminata relies on sulfide oxidation and the seep mussel on methane oxidation for growth.