Fertilizing riparian forests: nutrient repletion across ecotones with trophic rewilding

Effects of sedimentation on soil nutrient dynamics in riparian forests.

The influence of sedimentation rates on biogeochemistry of riparian forests was studied near ephemeral streams at Fort Benning, GA. Upper reaches of seven ephemeral streams had received varying rates of sedimentation stemming from erosion along unpaved roadways at the military installation. Two reference catchments were also included in the study. Decomposition of foliar litter, microbial C and...

Prehistoric and historic baselines for trophic rewilding in the Neotropics

A promising, but also controversial approach to ecological restoration is trophic rewilding, i.e., species introductions to restore top-down trophic interactions and associated trophic cascades to promote selfregulating biodiverse ecosystems. To provide historically-informed base-lines for trophic rewilding in the Neotropics, we aggregate data on late-Quaternary (last 130,000 years) large-bodie...

Nitrate Dynamics in Riparian Forests: Groundwater Studies

This study was conducted to assess the removal of groundwater nitrate (NOa-) in different soil drainage classes within three riparian forests located in Rhode Island. A solution of NOa-and a conservative tracer [either bromide (Br-) or chloride (CI-)] was applied in growing and the dormant seasons to trenches upgradient of wetland locations with hydric soils (poorly and very poorly drained soil...

Relationship Between Geomorphic Variations and Riparian Forests

Denitrification in riparian forests receiving agricultural discharges

Riparian forests can remove large amounts of nitrate from the groundwater discharges of adjacent uphill croplands. We review the mechanisms that could account for NO3 removal. Denitrification is hypothesized to be important, but measurement problems limit the relevant field data. We used large chambers (1-20 mZ) and tunable-diode laser infrared spectrophotometry to measure nitrous oxide (NzO) e...