Seasonal Fluctuations in the Benthic Community after the Collapse of a Clam, Ruditapes philippinarum, Population on the Midori River Tidal Flats in Kumamoto.
Seasonal Fluctuations in the Benthic Community after the Collapse of a Clam, Ruditapes philippinarum, Population on the Midori River Tidal Flats in Kumamoto.
复制标题
蛤蜊、菲律宾蛤蜊崩溃后底栖群落的季节性波动，熊本米多里河滩涂的种群数量。
DOI：
10.5179/benthos.55.1
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Y. Nakahara
中科院分区：
文献类型：
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作者：
H. Tsutsumi;Tomoe Takeguchi;A. Maruyama;Y. Nakahara
熊本县有明海沿岸沿着有桑迪滩涂，到20世纪80年代中期为止，菲律宾蛤仔的产量为4万至6.5万吨。然而，在过去的二十年里，蛤蜊的数量已经崩溃。在过去的几年里，每年收获的蛤蜊不到五千吨。研究了熊本绿川潮滩几种优势双壳类的种群动态和底栖生物群落动态。对菲律宾蛤仔（Ruditapes philippinarum）和东方蝇（Musculista senhousia）两种双壳类的种群研究结果揭示了这两种双壳类种群在潮滩上崩溃的原因之一。它们在基质上定居后死亡率很高。在恢复蛤蜊种群的实验研究中，从近海海底将沙子带到潮滩，覆盖面积为6，750平方米，深度为50厘米。仅在新砂区形成了370 gWW/m2以上的丰富底栖生物群落。处理后1年，菲律宾蛤仔和东方蝇等几种双壳类、多毛类等动物密集出现。这些底栖动物在新底质上定居后死亡率较低。
There are sandy tidal flats along the Ariake Sea coast in Kumamoto Prefecture, where 40 to 65 thousand tons of clams, Ruditapes philippinarum, were harvested until the mid-1980s. However, the clam population has collapsed over the past two decades. In the past few years, less than five thousand tons of the clams have been harvested per year. We have studied the population dynamics of several dominant species of bivalves and the benthic community dynamics of the Midori River tidal flats in Kumamoto. The results of population studies of two bivalves, Ruditapes philippinarum and Musculista senhousia, revealed one of the reasons why these populations collapsed on the tidal flats. They suffered high mortality after settling on the substrate. In experimental studies to recover the clam population, sand was brought from the sea floor offshore to the tidal flats, covering an area of 6,750m2 with a 50cm in depth. Abundant benthic communities over 370gWW/m2 were formed only in areas where new sand had been placed. Several species of bivalves, including Ruditapes philippinarum and Musculista senhousia, polychaetes and other animals occurred densely one year after the treatment. These benthic animals had low mortality after settling on the new substrate.