Life-history data of Echinogammarus marinus from three NE Atlantic estuaries under different levels of anthropogenic pressure

The present dataset contains the density, biomass, fecundity, and production of Echinogammarus marinus in three estuaries under different anthropogenic pressure and, within each estuary, at three sampling sites, which differed in terms of the distance to the estuary mouth, vegetation cover, and organic matter content. Monthly environmental abiotic data and seasonal concentration of PAH and other contaminants are also provided. Sampling took place monthly for 13 months at low tide on intertidal mudflats. At each site, Fucus fronds containing E. marinus individuals were randomly collected. All E. marinus individuals were counted, sexed, and measured under a binocular stereo microscope to estimate the density and the biomass of E. marinus in Fucus fronds. Finally, the annual production of E. marinus at each sampling site was estimated through the size-frequency method.

本数据集收录了不同人为干扰压力下3个河口的海棘钩虾（Echinogammarus marinus）种群密度、生物量、繁殖力及年生产量数据。每个河口内设置3个采样点位，各点位在距河口口门的距离、植被覆盖度及有机质含量方面存在差异。本数据集同时提供月度环境非生物因子数据，以及多环芳烃（Polycyclic Aromatic Hydrocarbons, PAH）与其他污染物的季节浓度信息。采样工作于13个月内每月在潮间带泥滩的低潮时段开展：在每个采样点位随机采集携带海棘钩虾个体的墨角藻（Fucus）藻叶；随后在体视显微镜下对所有海棘钩虾个体进行计数、性别鉴定与体长测量，以估算墨角藻藻叶上海棘钩虾的种群密度与生物量；最终通过体长频度法估算各采样点位上海棘钩虾的年生产量。