NOAA Fisheries, Milford Laboratory, 212 Rogers Avenue, Milford, CT 06460, United States of America.
NOAA Fisheries, Milford Laboratory, 212 Rogers Avenue, Milford, CT 06460, United States of America.
Mar Pollut Bull. 2018 Oct;135:165-175. doi: 10.1016/j.marpolbul.2018.07.025. Epub 2018 Jul 11.
Cues that drive bivalve settlement and abundance in sediments are not well understood, but recent reports suggest that sediment carbonate chemistry may influence bivalve abundance. In 2013, we conducted field experiments to assess the relationship between porewater sediment carbonate chemistry (pH, alkalinity (A), dissolved inorganic carbon (DIC)), grain size, and bivalve abundance throughout the July-September settlement period at two sites in Long Island Sound (LIS), CT. Two dominate bivalves species were present during the study period Mya arenaria and Nucula spp. Akaike's linear information criterion models, indicated 29% of the total community abundance was predicted by grain size, salinity, and pH. When using 2 weeks of data during the period of peak bivalve settlement, pH and phosphate concentrations accounted 44% of total bivalve community composition and 71% of Nucula spp. abundance with pH, phosphate, and silica. These results suggest that sediment carbonate chemistry may influence bivalve abundance in LIS.
驱动双壳类动物在沉积物中定居和丰度的线索还不是很清楚，但最近的报告表明，沉积物碳酸盐化学可能会影响双壳类动物的丰度。2013 年，我们进行了野外实验，以评估康涅狄格州长岛海峡（LIS）两个地点整个 7 月至 9 月沉降期内孔隙水沉积物碳酸盐化学（pH 值、碱度（A）、溶解无机碳（DIC））、粒度和双壳类动物丰度之间的关系。在研究期间，两种主要的双壳类动物存在，即 Mya arenaria 和 Nucula spp.。Akaike 的线性信息准则模型表明，总群落丰度的 29%可由粒径、盐度和 pH 值来预测。当使用 2 周的高峰期双壳类动物沉降数据时，pH 值和磷酸盐浓度分别占总双壳类动物群落组成的 44%和 Nucula spp.丰度的 71%，pH 值、磷酸盐和硅。这些结果表明，沉积物碳酸盐化学可能会影响 LIS 中双壳类动物的丰度。
