BENTHIC ANIMALS IN SHALLOW WATERS THAT CAN EXPLOIT CHEMOSYNTHETIC PRIMARY PRODUCTION

浅水中可以利用化学合成初级生产的底栖动物

• 批准号: 07836012
• 负责人: TSUTSUMI Hiroaki
• 金额: $ 1.15万
• 依托单位: PREFECTURAL UNIVERSITY OF KUMAMOTO
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07836012/
• 关键词: CAPITELLA; HYDROGEN SULPHIDE; ORGANIC ENRICHMENT; CHEMOSYNTHESIS; 共生細菌

Benthic communities, which rely on primary production by chemoautotrophic sulfur bacteria, have been discovered not only around hydrothermal vents, where heated water with extremely high levels of H_2S is emitted, but also in organically enriched sediments of estuaries and on mud flats, where sulfate-reducing bacteria decompose organic matter anaerobically producing H_2S.The benthic communities which rely on primary production by chemoautotrophic sulfur bacteriia appear to be widespread in sulfide-rich marine ecosystems. In this study, we report that growth of a deposit-feeding polychaete, Capitella sp. I, which is a dominant macrofaunal species in organically enriched sediments in coastal areas, was greatly enhanced by exposure to H_2S.The large worms grown in high levels of sulfide had significantly lower delta^<13>C values (mean, -24.4% than Control worms (mean, -20.1%). The worms appear to achieve normal growthrelying on the chemosynthetic production.

依赖化学自养硫磺细菌初级生产的底栖生物群落不仅在热水喷口附近被发现，而且在河口和泥滩的有机富集沉积物中也被发现，硫酸盐还原细菌在那里以厌氧方式分解有机物产生H_2S。依赖化学自养硫磺细菌初级生产的底栖生物群落在富硫海洋生态系统中似乎很普遍。在本研究中，我们报道了一种捕食性多毛类Capitella sp.生长情况。I是沿海有机富集沉积物中的优势大型底栖动物物种，暴露于H_2S后，I显著增强。生长在高硫化物环境中的大型蠕虫的Delta^lt；13和Gt；C值显著低于对照组(平均值为-24.4%，平均值为-20.1%)。这些蠕虫似乎依靠化学合成的产物实现了正常的生长。

项目成果

Hiroaki Tsutsumi, Sam Wainright, Sigeru Montani, Megumi Saga, Sagiri Ichihara: "Exploitation of a chemosynthetic food resource by a polychaete, Capitella sp. I" under reviewing of manuscript by Juurnal Experimental Ecology and Biology.

Hiroaki Tsutsumi、Sam Wainright、Sageru Montani、Megumi Saga、Sagiri Ichihara：“多毛类 Capitella sp. I 对化学合成食物资源的利用”，正在审阅 Juurnal Experimental Ecology and Biology 的手稿。