Studies on benthic communities in eutrophicated areas of the Seto Inland Sea. III. Effect of oxygen-deficient water on the settled abundance and size composition of the bivalve Theora lubrica.
Studies on benthic communities in eutrophicated areas of the Seto Inland Sea. III. Effect of oxygen-deficient water on the settled abundance and size composition of the bivalve Theora lubrica.
复制标题
濑户内海富营养化区底栖群落研究。
DOI：
10.2331/suisan.52.391
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发表时间：
1986
影响因子：
0.4
通讯作者：
H. Imabayashi
中科院分区：
文献类型：
--
作者：
H. Imabayashi
在濑户内海Hiuchi-Nada东部的软泥质沉积物的最表层，于1983年5月下旬形成了热分层。许多由Cea自身种群产卵的浮游幼虫间歇性地定居在表层沉积物上，并进一步长大至成虫阶段。夏季完全沉水的双壳类分布基本上受环境溶解氧浓度的控制。然而，在与主要生境不同的沉积物中，常常能发现刚定居不久的双壳类幼贝大量存在，但不久就在底层溶解氧显著降低的恶劣环境条件下灭绝。
The small semelid bivalve Theora lubrica, a selective deposit-feeder, predominated on the extreme surface of soft muddy sediment in the eastern area of Hiuchi-Nada, the Seto Inland Sea, where thermal stratification was formed in late smnmer, 1983.At three main habitats suitable for the bivalve, which were separated mutually by the deeper basin of a depth more than 20m where benthic individuals seldom occurred, many planktonic larvae spawned by ceah own population had settled intermittently on the surface sediment and further grown up to be in adult-stage. The distribution of completely settled bivalve was basically controlled by the ambient dissolved oxygen concentration in summer. However, the juvenile bivalve immediately after settlement was frequently found in great numbers in various sediments different from the main habitats, but shortly thereafter died out under such severe enviro-mental conditions as dissolved oxygen decreased markedly at the bottom layer.