Analysis of Sediment Phosphorus Pools in Shallow Lakes

These data sets summarize the results of a project to quantify and explain spatial variation in sediment phosphorus (P) pools in seven shallow lakes in NW Iowa, USA.1. "Cores_ALLDATA_2018.csv" is the primary data set. It contains sediment core data for all study lakes. Variables include sediment physical characteristics (moisture content, organic matter content, bulk density), sediment total P concentrations, and sediment P speciation (concentrations of loosely-bound, redox-sensitive, aluminum-bound, calcium-bound, and labile organic P). The file "Cores_ALLDATA_2018_README.csv" provides detailed meta-data.2. "Chla_MobileP_Regression.csv" provides additional data on the long-term concentrations of the algal pigment chlorophyll a in the study lakes. We used these data to analyze the relationship between long term lake productivity and mobile sediment P fractions in the sediments. The file "Chla_MobileP_Regression_README.csv" provides detailed meta-data.3. "Swan_macrophytes_2018.csv" summarizes the distribution of aquatic plants (macrophytes) in one study lake (Swan Lake), and "Swan_SedP_2018.csv" summarizes sediment P data for that lake. We used these datasets to analyze spatial relationships between macrophyte beds and sediment P pools. Detailed meta-data can be found in "Swan_macrophytes_2018_README.csv" and "Swan_SedP_2018_README.csv"