Porewater nutrient concentrations from control plots and fertilized plots at Spartina alterniflora, S.patens and Typha sp. marshes, Plum Island Ecosystem LTER, MA.

Porewater samples from five marsh locations in the Plum Island Ecosystems (PIE) LTER site were collected and analyzed for salinity as well as ammonium, phosphate, sulfide and chloride concentrations. Three sites (a Typha-dominated brackish marsh, a Spartina alterniflora-dominated salt marsh, and a S. patens-dominated salt marsh) are part of a long term study, and include fertilized and non-fertilized sample plots. Additionally, there are two non-fertilized marsh sites on the Parker River National Wildlife Refuge.

本研究采集了普卢姆岛生态系统（Plum Island Ecosystems, PIE）长期生态研究（Long Term Ecological Research, LTER）站点内5处沼泽生境的孔隙水样品，并对其盐度、铵盐、磷酸盐、硫化物及氯化物浓度开展了检测分析。其中3处样地分别为香蒲（Typha）占优势的咸淡水沼泽、互花米草（Spartina alterniflora）占优势的盐沼以及海滨米草（Spartina patens，简称S. patens）占优势的盐沼，均属于一项长期研究的组成部分，涵盖施肥与未施肥两类样方。此外，帕克河国家野生动物保护区内另有2处未施肥的沼泽生境样地。