Project Gallery

Wetland Ecology and Engineering Lab

Effects of sediment and nutrients on plant diversity and species composition of tidal freshwater wetlands of the Nanticoke River Bioreserve

Tidal freshwater marshes and swamps, Nanticoke River estuary, Maryland. Project includes a field fertilization experiment, an observational study of 48 marsh and swamp sites, and two seed bank experiments.

The role of seed dispersal in development of plant communities of restored tidal freshwater wetlands at Kingman Lake, Washington, DC

Before-after pictures showing vegetation development during the first growing season (2001).

Misting bench setup for seedling emergence assays (left) and seedlings emerging from wetland soils (right).

Quantifying patterns of mortality and damage 7 months after Hurricane Andrew (left) and resprouting, colonization, and growth biannually since 1993 (right).

Effects of hydrologic change on vegetation of freshwater tidal marshes

Experimental manipulation of marsh elevation to simulate different hydroperiods. Left: field experiment, Jug Bay, Patuxent River, Maryland. Right: greenhouse experiment, University of Maryland.

Animal disturbance in tidal freshwater marshes, Jug Bay, Patuxent River, Maryland

Exclosures to reduce disturbance by resident Canada geese and common carp. Left: In June 1999, higher density of Zizania aquatica inside than outside. Right: In October 1999, higher density of Bidens laevis inside than outside.

Measuring growth of plants in the greenhouse (left) and, from left to right, Typha latifolia plants subjected to 0, 50, 100, 200, and 400 mg/L ammonia (right).

Schematic of flow through treatment system (left) and wetland cells shortly after planting (right).

Conocarpus erectus swamp decimated by saltwater intrusion during Hurricane Lili (left) and students who participated in field sampling (right).