Total Dissolved Phosphorus for the Kuparuk River near Toolik Field Station, Alaska 1994-2012.

Samples from designated stations from the Kuparuk River were collected during each summer from 1983 to current time. Total Dissolved Phosphorous (TDP) analysis began in 1994. Phosphorus addition has occurred since 1983; station sites are relative distance from the original 1983 phosphorus dripper. Stations include sites in a reference, recovery, and fertilized reach. Reaches were defined based on the location of phosphorous addition (see methods). Phosphoric acid is added to the stream to increase the soluble reactive phosphorus by 0.32 uM. Three sampling dates occurred each summer; once in June prior to the start of fertilization and once each in July and August. Note no data was collected in 2000.自1983年至今，每年夏季均会采集库帕鲁克河（Kuparuk River）指定监测站的水样。总溶解磷（Total Dissolved Phosphorous, TDP）的分析检测工作始于1994年。自1983年起，该河段便持续开展磷素添加实验，各监测站的位置以1983年初始磷素滴加装置的相对距离进行标定。监测站点涵盖参考河段、恢复河段与磷素添加河段的采样点位。河段的划分依据磷素添加的位置而定（详见实验方法）。实验中向河道中投加磷酸，以使溶解性活性磷浓度提升0.32微摩尔（uM）。每年夏季共开展三次采样：分别于磷素添加实验开始前的6月，以及7月、8月各进行一次采样。需注意：2000年未采集任何实验数据。