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首页> 外文期刊>Estuarine Coastal and Shelf Science >Food Sources Of Benthic Animals On Intertidal And Subtidal Bottoms In Inner Ariake Sound, Southern Japan, Determined By Stable Isotopes
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Food Sources Of Benthic Animals On Intertidal And Subtidal Bottoms In Inner Ariake Sound, Southern Japan, Determined By Stable Isotopes

机译：稳定同位素确定的日本南部有明湾潮间带和潮间带底栖动物的食物来源

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摘要

To evaluate the relative importance of possible food sources, including riverine particulate organic matter, reeds, benthic microalgae, seaweeds, cultured laver (Porpfiyra) and coastal phytoplankton, for commercial bivalves and co-occurring benthic animals, 73 macrofaunal species were collected from intertidal and subtidal soft bottoms in the inner part of Ariake Sound, Kyushu, southern Japan, and their isotopic compositions were analyzed. The results revealed that (1) both intertidal and subtidal food webs were constituted of 3 trophic levels, (2) suspension-feeding bivalves utilize a mixture of benthic microalgae and coastal phytoplankton, and omnivores and carnivores incorporate benthic microalgae and phytoplankton through their intermediate prey, and (3) 3 bivalves (Scapharca kagoshimensis, Modiolus metcalfei and Atrina lischkeana) inhabiting both intertidal and subtidal bottoms showed similar seasonal fluctuations, suggesting no difference in the diet composition among the species and between the 2 habitats. We conclude that a large biomass of benthic microalgae which was approximately equal to that of phytoplankton and the strong tidal currents that would resuspend benthic microalgae and transport them to subtidal bottom areas account for the benthic microalgal and phytoplankton based trophic structure in the inner part of Ariake Sound.
机译：为了评估可能的食物来源（包括河流细颗粒有机物，芦苇，底栖微藻类，海藻，养殖紫菜（Porpfiyra）和沿海浮游植物）对商业双壳类和共生底栖动物的相对重要性，从潮间带和底栖动物中收集了73种大型动物分析了日本南部九州有明峡内部的潮下软底部及其同位素组成。结果表明，（1）潮间带和潮下带食物网均由3个营养层构成，（2）悬浮饲料双壳类动物利用底栖微藻和沿海浮游植物的混合物，杂食动物和食肉动物通过其中间捕食物结合了底栖微藻和浮游植物。 ，和（3）居住在潮间带和潮间带底部的3个双壳类动物（Scapharca kagoshimensis，Modiolus metcalfei和Atrina lischkeana）表现出相似的季节性波动，表明该物种之间以及两个生境之间的饮食组成没有差异。我们得出的结论是，底栖微藻的大量生物量大约等于浮游植物的生物量，而强大的潮流水流将使底栖微藻类悬浮并转移到潮下带底部区域，这是有明内部基于底栖微藻和浮游植物的营养结构的原因。声音。

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