Crab assemblages in Eelgrass beds in Southeast Alaska

Crab populations within intertidal eelgrass (Zostera marina) beds were assessed during summertime 2017, 2018 and 2019 (May-August). Data were collected on western Prince of Wales Alaska, at 21 sites in 2017, 6 sites in 2018 and 23 sites in 2019. At each site, the coordinates, dates and times that the pots were set and pulled, crab species, crab sex and crab size were recorded. Crabs were sampled by setting replicate strings of baited crab pots for 24-hrs, each with different pot styles. Fish were sometimes captured, as well, and are reported in this dataset. The purpose of these data was to characterize the crab assemblage within eelgrass communities so that analysis of trophic interactions could be assessed along a gradient of sea otter occupation for an NSF-funded project: Apex Predators, Ecosystems, and Community Sustainability (APECS, http://apecs-ak.org/). Other datasets to support this work are also archived with KNB with the identifier "APECS_alaska".

本数据集于2017、2018、2019年夏季（5月至8月），对阿拉斯加威尔士王子岛西部的潮间带大叶藻（Zostera marina）床内的蟹类种群开展调查评估。2017年共设置21个采样点，2018年为6个，2019年为23个。每个采样点均记录了蟹笼布设与起笼的坐标、日期、时间，以及螃蟹的物种、性别与体型大小。蟹类采样通过布设多组带饵蟹笼串完成，每组放置时长为24小时，且各组采用不同样式的蟹笼。调查过程中偶尔也会捕获鱼类，相关数据亦收录于本数据集。本数据集旨在刻画大叶藻群落内的蟹类类群组成，以便为美国国家科学基金会（National Science Foundation, NSF）资助的“顶级捕食者、生态系统与群落可持续性”（Apex Predators, Ecosystems, and Community Sustainability，缩写APECS，网址：http://apecs-ak.org/）项目，沿海獭栖息梯度开展营养级相互作用分析提供支撑。本项目的其他支撑数据集亦已存档于生物复杂性知识网络（Knowledge Network for Biocomplexity, KNB），标识符为"APECS_alaska"。