Phosphorus Sorption Dynamics in Louisiana Brackish and Salt Marshes, September 2012

This dataset contains values for the phosphorus sorption index (PSI) collected from 13 marshes in Terrebonne (TB), western Barataria (WB), and eastern Barataria Bay (EB), LA. In TB and EB we sampled two oiled marshes and two unoiled marshes, and in WB we sampled three oiled marshes and two unoiled marshes. At each marsh, we sampled along a 20-m transect from the marsh edge and collecting soil samples every 5 m. Each sample was analyzed for PSI and a suite of physical (soil water content, bulk density) and chemical properties (pH, organic C, total N, molar C:N ratio, total P), and extractable iron, aluminum, and two forms of phosphorus. Using these measurements, we estimated the phosphorus saturation ratio (PSR) and soil phosphorus storage capacity (SPSC). This dataset is used in the publication: Marton JM and Roberts BJ. 2014. Spatial variability in phosphorus sorption dynamics in Louisiana salt marshes. JGR-Biogeosciences 119: 451–465. DOI: 10.1002/2013JG002486.