precipitation_experiment_resources

This data file contains measurements of soil resources and plant community characteristics from a precipitation experiment in a mixed-grass prairie in Colorado. All measurements were made from 2011-2013. The 'treatment' column heading corresponds to the precipitation treatment received by the plot; ‘winwet’ = winter wet, ‘winwet_sumdry’ = winter wet/summer dry, ‘windry_sumwet’ = winter dry/summer wet, and ‘windry_sumwet’ = winter dry/summer wet. ‘Spring_nitrogen’ = total nitrogen extracted from resin bags buried in plots at 5 cm depth from April-May (units are µg N / gram resin). ‘summer_nitrogen’ = total nitrogen extracted from resin bags from June- September, ‘winter_nitrogen’ = total nitrogen extracted from resin bags from October-March. Units for aboveground biomass are g/m2. ‘VWC’ = soil volumetric water content (%) from 0 – 12 cm depth. ‘Diversity’ = Shannon-Weiner diversity index. ‘April_B_tectorum’ = % cover of Bromus tectorum in plots in April.本数据集包含美国科罗拉多州混合草本草原降水实验中获取的土壤资源及植物群落特征实测数据，所有观测均于2011至2013年间开展。'treatment'（处理组）字段代表样地所接受的降水调控处理：'winwet'表示冬季增湿，'winwet_sumdry'表示冬季增湿/夏季减湿，'windry_sumwet'表示冬季减湿/夏季增湿（原文此处存在重复标注，保留原样）。'Spring_nitrogen'（春季氮含量）指4至5月间埋藏于样地5cm深度树脂袋所提取的总氮量，单位为微克氮/克树脂（µg N / g resin）。'summer_nitrogen'（夏季氮含量）为6至9月树脂袋提取的总氮量；'winter_nitrogen'（冬季氮含量）为10月至次年3月树脂袋提取的总氮量。地上生物量的单位为克每平方米（g/m²）。'VWC'（土壤体积含水量）指0至12cm深度的土壤体积含水率（%）。'Diversity'（多样性指数）为香农-威纳（Shannon-Weiner）多样性指数。'April_B_tectorum'为4月样地中旱雀麦（Bromus tectorum）的盖度百分比（%）。