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Nutritional Condition of a shallow-water vestimentiferan tube-worm

浅水 Vestimentiferan 管虫的营养状况

基本信息

批准号：
09839023
负责人：
MIURA Tomoyuki
金额：
$ 1.79万
依托单位：
Kagoshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09839023/
关键词：
Chemoautotrophy Hydrogen Sulfide Kagoshima Bay Tube-worm Nuturitional Ecology Annelida Stable Isotope Analysis Submarine Volcanism 深海生物

项目摘要

Lamellibrachia satsuma, a shallow water vestimentiferan tube-worm, living in Kagoshima Bay at depths of 80-100 m was studied to elucidate its micro-distribution and nutritional condition.(Field observation) The southern half of tube-worm site was observed using the deep-sea submersible Shinkai 2000 by the first author. There were a few large and numerous small bush-like assemblages in a restricted area of about 100 x 200 meters. To know the growth in the field, a staining experiment of tubes using a blue dye was tried. It was, however not successful because of thick sedimentation of this inner bay field.(Nutritional condition) The uptake of hydrogen sulfide was detected in rearing tube-worm specimens in a public aquarium by a routine water-quality analysis. To elucidate the natural nutritional condition of the species, we analyze the sulfur isotopic components. In the field, the emitted volcanic gas contains rather heavy sulfide (+17 per thousand in delta 34S) compared with other deep-sea hydro-thermal vent systems (0 to +5). The body of tube-worms from Kagoshima Bay, however was composed by very light sulfide (-30). It is highly possible that the production process of hydrogen sulfide used by tube-worms may be unique in Kagoshima Bay and not same as in other deep-sea vent systems.

研究了鹿儿岛湾80 ~ 100 m浅水翅门管虫——萨摩板板虫的微分布和营养状况。（野外观测）第一作者利用深海潜水器“新海2000”对管虫区南半部进行了观测。在大约100 × 200米的限制区域内，有一些大的和许多小的灌木状的组合。为了了解田间的生长情况，用蓝色染料对试管进行了染色实验。然而，由于这片内海湾地区的厚沉积，它没有成功。（营养状况）通过常规水质分析，对某公共水族馆养殖管虫标本中硫化氢的摄取量进行了检测。为了阐明该物种的天然营养状况，我们分析了其硫同位素组成。在野外，与其他深海热液喷口系统（0 ~ +5）相比，喷出的火山气体含有相当重的硫化物（δ 34S中+17‰）。然而，鹿儿岛湾的管虫的身体是由非常轻的硫化物（-30）组成的。管虫产生硫化氢的过程很可能在鹿儿岛湾是独一无二的，与其他深海喷口系统不同。