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首页> 外文期刊>Journal of oceanography >Long-Term Investigation of Spatio-Temporal Variations in Faunal Composition and Species Richness of Megabenthos in Ise Bay, Central Japan
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Long-Term Investigation of Spatio-Temporal Variations in Faunal Composition and Species Richness of Megabenthos in Ise Bay, Central Japan

机译:日本中部伊势湾大型底栖动物的动物组成和物种丰富度时空变化的长期调查

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摘要

Based on our long-term data from megabenthos sampling from 1993 to 2002 in Ise Bay, central Japan, we examined spatio-temporal variations in taxon composition, species richness and its distribution of megabenthos in the bay in relation to the occurrence of the oxygen-poor water (i.e. oxygen content less than 3 ppm) in bottom waters of the bay. A total of 261 species were identified including 6 cnidarians, 1 tentaculate, 5 annelids, 71 molluscs, 72 crustaceans, 16 echinoderms, 12 urochordates and 78 pisces. Of the most abundant 10 megabenthos species, the following 4 species of echinoderms made up more than the half of megabenthos biomass: Luidia quinaria, Echinocardium cordatum, Asterias amurensis and Astropecten scoparius. Species richness of megabenthos varied significantly between seasons and among stations. The severity and period of occurrence of the oxygen-poor water developing every summer play an important role in determining spatial distributions of species richness in the bay.
机译:根据我们从1993年至2002年在日本中部伊势湾进行的大型底栖动物采样的长期数据,我们研究了海湾中大型底栖动物的分类单位组成,物种丰富度及其分布与时空氧气的相关时空变化。海湾底水的水差(即氧气含量低于3 ppm)。总共鉴定出261种,包括6种虫,1种触角虫,5种无节肢动物,71种软体动物,72种甲壳类动物,16种棘皮动物,12种泌尿生殖动物和78个双鱼。在最丰富的10种大型底栖动物物种中,以下4种棘皮动物占大型底栖生物量的一半以上:奎奴亚藜(Luidia quinaria),E棘棘心虫(Echinocardium cordatum),阿斯特里斯(Asterias amurensis)和麦角天牛(Astropecten scoparius)。大型底栖动物的物种丰富度在季节之间和站间差异很大。每年夏季形成的缺氧水的严重性和发生时间在确定海湾物种丰富度的空间分布方面起着重要作用。

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