What We Study:
- Understanding the role of nitrogen "sinks", including riparian areas, streams and reservoirs, on the landscape reducing the export of nitrate from coastal watersheds.
- Understanding the role of watershed features and human activities on streamflow regimes.
Our recent and ongoing projects:
- Groundwater nitrate cycling in riparian zones
- Groundwater nitrate cycling in salt marshes
- In-stream denitrification
- Advancing watershed nitrogen management at the local level
- Effect of woody debris on fluvial system nitrogen
- Artificial nitrogen sinks
- Watersheds and streamflow regimes
Nitrate leaching to
groundwater is greatly increased by human inputs, such as fertilizer
and leaking septic systems.
There is evidence of high nitrate concentrations in groundwater all over the North East US.
Excessive nitrogen (N) can cause unsightly algae blooms in coastal ponds and estuaries which consume available oxygen and cause other organisms to die.
Great uncertainty surrounds N cycling within coastal watersheds. Not all N entering the watershed can be traced, leaving unidentified N sinks. The fate of the remainder N is a major challenge to coastal managers.