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Nutrient Dynamics in Relation to Geomorphology of Riverine Wetlands

^a Natural Resources Research Institute, Univ. of Minnesota, 5013 Miller Trunk Highway, Duluth, MN 55811
^b Dep. of Biological Sciences, Univ. of Notre Dame, Notre Dame, IN 46556
^c National Center for Environmental Assessment, U.S. Environmental Protection Agency, 26 W. Martin Luther King Drive, Cincinnati, OH 45268

View larger version (42K): [in a new window]   Fig. 1. Study sites

View larger version (25K): [in a new window]   Fig. 2. Physical site characteristics at the Fond du Lac and Pokegama wetlands, means and 95% confidence intervals by geomorphic group

View larger version (25K): [in a new window]   Fig. 3. Total soil nutrients and amorphous Fe and Al at the Fond du Lac and Pokegama wetlands, means and 95% confidence intervals by geomorphic group

View larger version (25K): [in a new window]   Fig. 4. Herbaceous biomass and total plant nutrients at the Fond du Lac and Pokegama wetlands, means and 95% confidence intervals by geomorphic group

View larger version (49K): [in a new window]   Fig. 5. Seasonal soil chemistry at the (a–e) Fond du Lac and (f–j) Pokegama wetlands, means and 95% confidence intervals by geomorphic group. AFP = acid-fluoride extractable P

View larger version (30K): [in a new window]   Fig. 6. Seasonal porewater nutrients at the (a–c) Fond du Lac and (d–f) Pokegama wetlands, means and 95% confidence intervals by geomorphic group. Note that y-axis scales for porewater NO3–N are not the same at both sites (b and e). SRP = soluble reactive P

View larger version (50K): [in a new window]   Fig. 7. Seasonal surface water pH and nutrient concentrations at the (a–f) Fond du Lac and (g–l) Pokegama wetlands, means and 95% confidence intervals by geomorphic group. TN = total N; TP = total P

View larger version (17K): [in a new window]   Fig. 8. Sedimentation rates at the Fond du Lac and Pokegama wetlands, means and 95% confidence intervals by geomorphic group