Data for: Seagrass increases seasonal variability in nekton but not predation intensity in mid-latitude estuaries

We sampled nekton, eelgrass, and predation intensity (loss of baits over 24 h) in summer 2016 and spring 2017 to test hypotheses about the seasonality of nekton and food web interactions in structured and unstructured low intertidal soft sediment habitats. The data sets provide the GPS locations, eelgrass size and density, nekton size and density, and predation intensity. We found that nekton differed more seasonally in eelgrass than bare habitat, consistent with seasonally-variable structure. Predation intensity was higher in summer than spring but did not differ by habitat. Some eelgrass-associated species increased with eelgrass abundance seasonally, but grass shrimp declined, likely due to intraguild predation. The morphotype of eelgrass and geographic proximity did not explain differences among the five sites in terms of nekton assemblages and seasonality.我们于2016年夏季与2017年春季开展采样工作，针对结构化与非结构化低潮带软沉积底栖生境中自游生物（nekton）与食物网交互作用的季节动态提出研究假设，并对自游生物、鳗草（eelgrass）以及捕食强度（24小时内饵料流失量）进行了采样。本数据集包含GPS定位信息、鳗草的尺寸与密度、自游生物的尺寸与密度，以及捕食强度相关数据。研究结果表明，相较于裸底生境，鳗草生境中的自游生物季节差异更为显著，这与随季节变化的生境结构特征相符。捕食强度在夏季高于春季，但不同生境间无显著差异。部分与鳗草关联的物种随鳗草丰度的季节性变化而数量增加，但草虾（grass shrimp）的丰度却出现下降，这大概率由集团内捕食（intraguild predation）所致。鳗草的形态型（morphotype）与地理邻近性，无法解释五个采样站点在自游生物群落组成及其季节动态方面的差异。