Metabolic rates and thermal tolerances of chemoautotrophic symbioses from Lau Basin hydrothermal vents and their implications for species distributions
Metabolic rates and thermal tolerances of chemoautotrophic symbioses from Lau Basin hydrothermal vents and their implications for species distributions
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DOI：
10.1016/j.dsr.2008.02.001
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发表时间：
2008-05-01
影响因子：
2.4
通讯作者：
Figueroa, Dijanna
中科院分区：
文献类型：
--
作者：
Henry, Michael S.;Childress, James J.;Figueroa, Dijanna
对Lau盆地热液喷口的三种移动的共生软体动物（两种原腹足类Alviniconcha sp.和Ifremeria nautilei;以及贻贝Bathymodiolus brevior）的代谢率和耐热性进行了测量。两种腹足类的耐热性相似，远远超过原位观察到的温度，虽然Alviniconcha属似乎有稍高的耐受性。B。brevior具有较低的热极限，可以将其排除在活跃排气的中心区域之外。高压呼吸测定实验表明，Alviniconcha sp.具有非常高的潜在增长率;其内共生体的碳吸收量是有记录以来最高的。鹦鹉螺和B中代谢物的吸收率。两者合计，这些热耐受性和代谢物的吸收率有助于解释在原地看到的地带性模式，其中Alviniconcha sp.被发现最接近的喷口流体的来源，其次是I。鹦鹉螺然后是B brevior。(C)2008爱思唯尔有限公司保留所有权利。
Metabolic rates and thermal tolerances of three species of mobile symbiotic molluscs (two provannid gastropods Alviniconcha sp. and Ifremeria nautilei; and the mussel Bathymodiolus brevior) from Lau Basin hydrothermal vents were measured. Thermal tolerances of the two gastropods were similar and well in excess of temperatures observed in situ, although Alviniconcha sp. appeared to have slightly higher tolerances. B. brevior had lower thermal limits that could exclude it from central areas of active venting. High-pressure respirometry experiments revealed that Alviniconcha sp. has very high potential growth rates; its uptake of carbon for its endosymbionts being among the highest recorded. Uptake rates of metabolites in L nautilei and B. brevior were an order of magnitude lower than those observed in Alviniconcha sp. Taken together, these thermal tolerances and metabolite uptake rates help to explain the zonation patterns seen in situ, where Alviniconcha sp. is found closest to the source of vent fluid, followed by I. nautilei, and then B. brevior. (C) 2008 Elsevier Ltd. All rights reserved.