Densities and Zonation Patterns of Native and Non-Indigenous Oysters in Southern California Bays
Densities and Zonation Patterns of Native and Non-Indigenous Oysters in Southern California Bays
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南加州海湾本地和非本地牡蛎的密度和分区模式
DOI：
10.1007/s13157-018-1055-0
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发表时间：
2018
期刊：
影响因子：
2
通讯作者：
D. Zacherl
中科院分区：
文献类型：
--
作者：
Nicole B. Tronske;Thomas A. Parker;H. Henderson;Jennifer L. Burnaford;D. Zacherl
在世界范围内，人工防护的海岸线可以控制可用的河口栖息地。美国南加州人工基质的增加与非本地物种丰富度的增加相一致。美国西海岸的奥林匹亚牡蛎，Ostrea lurida，可能对自然栖息地可用性的变化特别敏感，最近经历了大规模的丰度下降。与此同时，非本地的、经常入侵的太平洋牡蛎长牡蛎（Crassostrea gigas）已被引入美国西海岸，包括南加州河口，其影响尚未得到研究。我们recordedC。gigasandO。从2010年10月到2017年7月，整个南加州几种栖息地类型的海水密度，以及潮汐高度的函数，作为评估碳影响的关键基线。牡蛎。Ostrea lurida的比例高于c。以硬底物为主的栖息地，无论是自然的还是人为引入的。出现了强烈的分区格局；gigas的最大密度在+0.4 m以上，而不是o。或低于+0.2 m MLLW。这些数据揭示了放置修复器的最佳潮汐高度。研究并建立了评估未来牡蛎密度变化的关键基线和技术。
Worldwide, artificially armored shorelines can dominate available estuarine habitat. Increases in artificial substrata in southern California, USA, coincide with increased abundances of nonindigenous species. The US west coast Olympia oyster,Ostrea lurida, may be particularly sensitive to changes in natural habitat availability and recently experienced large-scale declines in abundance. Simultaneously, the non-indigenous and often invasive Pacific oyster,Crassostrea gigas, has been introduced along the US West Coast, including into southern California estuaries where its impact is unstudied. We recordedC. gigasandO. luridadensities from October 2010 through July 2017 throughout southern California on several habitat types and as a function of tidal elevation as a critical baseline for evaluating impacts ofC. gigas.Ostrea luridawas present in higher proportions thanC. gigasin hard substrate-dominated habitats, whether natural or human-introduced. A strong zonation pattern emerged;C. gigasachieved its maximum density above +0.4 m MLLW versusO. luridaat or below +0.2 m MLLW. These data reveal the optimal tidal elevation for placement of a restoredO. luridabed and establish a critical baseline and techniques for evaluating future changes in oyster density.