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首页> 外文期刊>ICES Journal of Marine Science >Megafauna community structure and trophic relationships at the recently discovered Concepcion Methane Seep Area, Chile, ～36°S
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Megafauna community structure and trophic relationships at the recently discovered Concepcion Methane Seep Area, Chile, ～36°S

机译：最近发现的智利康塞普西翁甲烷渗漏区的大型动物群落结构和营养关系，〜36°S

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摘要

The fauna, community composition, and trophic support of the newly discovered Concepcion Methane Seep Area (CMSA) are compared with those at a nearby non-seep control. The assemblage of chemosymbiotic bivalves is defined by eight species, including the families Lucinidae, Thyasiridae, Solemyidae, and Vesicomyidae. Seep polychaetes are represented by Lamellibrachia sp. and two commensal species of the vesicomyid Calyptogena gallardoi. Although taxonomic analysis is still under way, most of the chemosymbiotic species seem to be endemics. The CMSA is a hotspot for non-seep benthic megafauna too; 101 taxa were present, but most of them are colonists or vagrants (i.e. not endemics of methane seeps). Isotope analysis supported the belief that non-symbiont-bearing species utilize photosynthetically fixed carbon, because they were isotopically distinct from the chemosymbiotic bivalve species present, it is our opinion that, at this site, which underlies one of the most productive coastal upwelling regions of the world, spatial heterogeneity and the availability of hard substratum, generated by the presence of authigenic carbonate crusts, are more important factors in attracting non-seep fauna than the availability of locally produced chemosynthetic food.
机译：将新发现的康塞普西翁甲烷渗漏区（CMSA）的动物区系，群落组成和营养支持与附近的非陡坡控制区进行了比较。化学共生双壳类的组合由八个物种定义，包括Lucinidae，Thyasiridae，Solemyidae和Vesicomyidae科。渗水多毛cha以Lamellibrachia sp。为代表。和两个共生物种的囊壁小鳞蝇（Calyptogena gallardoi）。尽管分类学分析仍在进行中，但大多数化学共生物种似乎是地方性的。 CMSA也是非深水底栖大型动物的热点。目前有101个分类单元，但大多数是殖民者或流浪者（即不是甲烷渗透的地方性物种）。同位素分析支持这样一种信念，即非共生物种利用光合固定碳，因为它们在同位素上不同于目前的化学共生双壳类，因此，我们认为，在这个站点上，该物种是该海岸生产力最高的沿海上升区之一。在世界范围内，自生碳酸盐地壳的存在产生的空间异质性和硬质基质的可利用性，比本地生产的化学合成食品的可利用性，是吸引非深度动物区系的重要因素。

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