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Nutrient Enrichment of Wetland Vegetation and Sediments in Subtropical Pastures

^a MacArthur Agro-Ecology Research Center, A Division of Archbold Biological Station, 300 Buck Island Ranch Road, Lake Placid, FL 33852
^b Dep. of Soil and Water Science, Univ. of Florida, 106 Newell Hall, Gainesville, FL 32611

View larger version (22K): [in a new window]   Fig. 1. Mean monthly water depth measured in improved pasture and seminative pasture wetlands (September 2000 to May 2003) illustrating the seasonal fluctuation of both water depth and hydroperiod in these wetland systems (modified from Steinman et al. 2003).

View larger version (21K): [in a new window]   Fig. 2. Relationship between total soil C concentration and cumulative total CO2–C per unit organic matter for both improved and seminative pasture wetlands

View larger version (28K): [in a new window]   Fig. 3. Nutrient stoichometric ratios for improved and seminative wetland soil wetland soils. Bars represent standard errors of the sample means.

View larger version (21K): [in a new window]   Fig. 4. Relationship between N and P concentrations for live plant materials harvested in both improved and seminative pasture wetlands.

View larger version (23K): [in a new window]   Fig. 5. Plant tissue nutrient stoichometric ratios for improved and seminative pasture wetlands. Bars represent the standard error of the sample means.