Coastal Wetland Belowground Biomass

These data were collected in the field in 2008 from a Sagittaria lancifolia L. dominated, oligohaline marsh located along the west bank of the Tchefuncte River, approximately 1 km north of Lake Pontchartrain, LA, USA (30° 23.205’N, 90° 09.551’ W). Two methods were used to estimate belowground biomass: the ingrowth method and the standing crop method. Abbreviated headings are as follows: "Block" = statistical block; "N" = nitrogen enrichment treatment (kg/ha/yr); "P" = phosphorus enrichment treatment (kg/ha/yr); "LRoot IG" = live root biomass in ingrowth cores (g/m2); "LRhiz IG" = live rhizome biomass in ingrowth cores (g/m2); "Live IG" = live root+rhizome biomass in ingrowth cores (g/m2); "Dead IG" = dead root+rhizome biomass in ingrowth cores (g/m2); "Total IG" = total live+dead biomass in ingrowth cores (g/m2); "LRoot SC" = live root biomass in standing crop cores (g/m2); "LRhiz SC" = live rhizome biomass in standing crop cores (g/m2); "Live SC" = live root+rhizome biomass in standing crop cores (g/m2); "Dead SC" = dead root+rhizome biomass in standing crop cores (g/m2); "Total SC" = total live+dead biomass in standing crop cores (g/m2).