Evidence for a chemoautotrophically based food web at inactive hydrothermal vents (Manus Basin)
Evidence for a chemoautotrophically based food web at inactive hydrothermal vents (Manus Basin)
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DOI：
10.1016/j.dsr2.2009.05.002
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发表时间：
2009-09-01
影响因子：
3
通讯作者：
Van Dover, C. L.
中科院分区：
文献类型：
--
作者：
Erickson, K. L.;Macko, S. A.;Van Dover, C. L.
热液喷口是短暂的系统。当排气关闭，硫化物依赖的类群死亡，和非排气类群可以殖民化的硬基质。在马努斯盆地（巴布亚新几内亚），热液活跃和不活跃的网站穿插，水螅，cladorhizid海绵，藤壶，竹珊瑚，和其他无脊椎动物类型可能占据不活跃的网站。碳和氮同位素组成的动物占据不活跃的网站是一致的营养依赖于任何chemoautotrophically或光合作用产生的有机物质，但这些动物的硫同位素组成指向一个chemoautotrophic源的硫溶解在喷口流体中的硫化物，而不是来自海水硫酸盐通过光合作用。鉴于悬浮摄食和微型食肉无脊椎动物是非活动地点的主要生物量，化能自养营养的主要来源可能是附近活动喷口释放的悬浮颗粒物和生物。(C)2009爱思唯尔有限公司保留所有权利。
Hydrothermal vents are ephemeral systems. When venting shuts down, sulfide-dependent taxa die off, and non-vent taxa can colonize the hard substrata. In Manus Basin (Papua New Guinea), where hydrothermally active and inactive sites are interspersed, hydroids, cladorhizid sponges, barnacles, bamboo corals, and other invertebrate types may occupy inactive sites. Carbon and nitrogen isotopic compositions of animals occupying inactive sites are consistent with nutritional dependence on either chemoautotrophically or photosynthetically produced organic material, but sulfur isotopic compositions of these animals point to a chemoautotrophic source of sulfur from dissolved sulfide in vent fluids rather than sulfur derived from seawater sulfate through photosynthesis. Given that suspension-feeding and micro-carnivorous invertebrates are the biomass dominants at inactive sites, the primary source of chemoautotrophic nutrition is likely suspended particulates and organisms delivered from nearby active vents. (C) 2009 Elsevier Ltd. All rights reserved.