Use of Flow Refuges by Unionid Mussels in Rivers
Use of Flow Refuges by Unionid Mussels in Rivers
复制标题
河流中 Unionid 贻贝对流避难所的使用
DOI：
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发表时间：
1999
影响因子：
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通讯作者：
D. Strayer
中科院分区：
文献类型：
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作者：
D. Strayer
河流中相当大范围内的联合贻贝的斑块不能用简单的栖息地特征来解释，比如水深、水流速度或沉积物粒度。作为另一种选择，我假设贻贝主要是在河床的稳定区域发现的，在那里洪水时水力压力低。在纽约东南部的两条小河中，我利用标记岩石的运动来定位洪水期间的流动避难所。在两个研究地点，贻贝床在空间上与流动避难所一致，但与栖息地的其他测量特征（水深、水流速度、沉积物粒度）不一致。流动避难所的使用可能部分解释了河流中联合群落的特征斑块，并有助于这些长寿，缓慢移动的动物在流动的水中取得成功。
The considerable within-reach patchiness of unionid mussels in rivers has not been explicable by simple habitat features such as water depth, current speed, or sediment grain size. As an alternative, I hypothesized that mussels are found chiefly in stable areas of the river bed where hydraulic stresses during floods are low. I used movement of marked rocks to locate flow refuges during floods in 2 small rivers in southeastern New York. Mussel beds were spatially coincident with flow refuges, but not with other measured features of the habitat (water depth, current speed, sediment grain size) in both study sites. Use of flow refuges by unionids may partly explain the characteristic patchiness of unionid communities in rivers, and contribute to the success of these longlived, slow-moving animals in running waters.