Data underlying the publication: Changed sediment composition prevents recovery of macrobenthic community four years after a shoreface nourishment at the Holland coast

In 2017, a shoreface nourishment was constructed at the Holland coast near Callantsoog at a water depth of 10 m. Because the influence of waves is limited at this depth, the nourishment is not very mobile. Sediment composition (grain size distribution) and macrobenthos was monitored at the nourished site and two reference locations before (2015 and 2015), and four years after (2021) nourishment. The file "sediment_composition_Callantsoog.csv" contains the data on sediment composition: SD50 (median grain size, µm), SD10 (10-percentile, µm), SD90 (90-percentile, µm), silt (percentage < 64 µm), very_fine_sand (percentage between 62 µm and 125 µm), fine_sand (percentage between 125 µm and 250 µm), medium_sand (percentage between 250 µm and 500 µm) and coarse_sand (percentage between 500 µm and 1000 µm). The file "Macrobenthos_Callantsoog.csv" contains density (# m-2) and biomass (g m-2) of the macrobenthic species recorded at the different locations.

2017年，荷兰海岸卡兰茨奥赫（Callantsoog）附近海域于水深10米处实施了岸滩补沙工程（shoreface nourishment）。由于该水深条件下波浪作用有限，补沙体的移动性较弱。本数据集于补沙前的2015年（共两次监测）及补沙后四年的2021年，对补沙区域及两个对照点位的沉积物组成（粒度分布）与大型底栖生物（macrobenthos）开展了监测。
文件"sediment_composition_Callantsoog.csv"包含沉积物组成相关数据，具体指标包括：SD50（粒径中值，单位：微米）、SD10（粒径10分位值，单位：微米）、SD90（粒径90分位值，单位：微米）、粉砂（粒径<64微米的组分占比）、极细砂（粒径62~125微米的组分占比）、细砂（粒径125~250微米的组分占比）、中砂（粒径250~500微米的组分占比）以及粗砂（粒径500~1000微米的组分占比）。
文件"Macrobenthos_Callantsoog.csv"包含各监测点位记录的大型底栖生物物种的密度（单位：个/平方米）与生物量（单位：克/平方米）数据。