奥林匹亚牡蛎,Ostrealuria,是北美太平洋沿岸河口许多修复项目的目标,而非本地太平洋牡蛎,MagallanaGigas,在全球牡蛎水产养殖中占主导地位。这两个物种都提供了过滤功能,该功能在加利福尼亚的三个海湾中使用整个栖息地进行了研究,原位方法,实验室粒子选择实验,和区域生理比较。叶绿素α的测量,温度,盐度,以及上游和下游的浊度,以及塞斯顿总颗粒物和有机物含量的点样本,以估计栖息地清除率(HCR,收集Lhr-1m-2)。从2018年2月到2019年6月,在四个地点进行了22项试验。HCRs在站点内部和站点之间高度可变,从-464到166Lhr-1m-2的站点平均值,并且在站点之间没有显着差异,表明O.lurida栖息地和M.gigas水产养殖的现场过滤性能相似。使用随机森林回归,位点是HCR最重要的预测因子,变量重要性评分为25.7%(SD=4.6%)。O.luria和M.gigas具有明显不同的粒度选择偏好,可能会影响其过滤质量。这项研究的结果表明,恢复O.lurida栖息地可能提供与M.gigas水产养殖类似的过滤益处,但是各个海湾独特的流体动力学和食品质量,以及过滤器饲养群落的区域差异,在管理牡蛎栖息地的过滤功能时必须考虑。
The Olympia oyster,
Ostrea lurida, is the target of many restoration projects along estuaries on the North American Pacific coast, while the non-native Pacific oyster, Magallana gigas, dominates oyster aquaculture globally. Both species provide filtration functions that were investigated in three California bays using a whole-habitat, in situ approach, a laboratory particle selection experiment, and a regional physiological comparison. Measurements of chlorophyll α, temperature, salinity, and turbidity upstream and downstream, as well as point samples of seston total particulate matter and organic content to estimate habitat clearance rates (HCR, L hr-1 m-2) were collected. From February 2018 to June 2019, twenty-two trials were conducted across four sites. HCRs were highly variable within and among sites, ranging from site averages of -464 to 166 L hr-1 m-2, and not significantly different among sites, indicating field filtration performance of O. lurida habitat and M. gigas aquaculture is similar. Using a random forest regression, site was the most important predictor of HCR, with a variable importance score of 25.7 % (SD = 4.6 %). O. lurida and M. gigas had significantly different particle size selection preferences, likely affecting the quality of their filtration. This study\'s findings suggest that restoring O. lurida habitat may provide similar filtration benefits as M. gigas aquaculture, but the unique hydrodynamics and food quality of individual bays, as well as regional differences in filter feeder communities, must be considered in managing oyster habitat for filtration functions.