Ruth Patrick Memorial Symposium

Join fellow scientists and environmental advocates to explore how Dr. Ruth Patrick launched the field of Environmental Science, as well as her many contributions. More.

Systematics and Evolution

The Center for Systematic Biology and Evolution cares for and studies over 18 million specimens of plants and animals, and conducts research in systematics, ecology, evolution, and paleontology.

Environmental Research

The Patrick Center for Environmental Research has been dedicated to understanding, protecting, and restoring the health of watersheds since 1947.

From the Field

field crew sampling for american eels using backpack electorfishing

American Eel Abundance: Recent Trends in Southeastern Pennsylvania

The status and population trends of the yellow eel stage of this commercially and ecologically significant fish was studied in several streams in southeastern Pennsylvania. » Read More
field crew taking a sediment core sample from a tidal marsh

Historical Reconstruction of Chemical Loadings and Ecosystem Effects in Delaware Bay Tidal Marshes

Potential ecological effects of dam removal across a range of dam and stream/watershed characteristics were studied in southeastern Pennsylvania and northeastern Maryland using ecological risk assessment. » Read More
view upstream from Cresiem Creek in Fairmont Park

Fairmount Park Restoration

The Academy worked with Morris Arboretum and the Natural Lands Trust to develop master plans to restore natural landscapes in seven watersheds of the Fairmount Park system in Philadelphia. » Read More
Holston River

South Fork Holston River Monitoring

This is the seventh in a series of biological and water quality surveys of the Holston River near Kingsport, Tennessee, conducted by the Patrick Center since 1965. » Read More
heavy machinery demolishing the low dam spanning the Manatawny

Manatawny Creek Dam Removal

The Patrick Center collaborated with local organizations in 2000 to undertake one of the first comprehensive studies to document large-scale physical, chemical, and biological changes in a river following dam removal. » Read More
field crew seining for shoreline fish along an estuarine shipping channel

Neches River Monitoring

For over 50 years independent academic and scientific institutions have conducted periodic monitoring studies of the lower Neches River in Texas. This is a report on the sixth of such surveys conducted by the Academy's Patrick Center » Read More
partially restored headwater stream in Pennsylvania

Compilation and Evaluation of Stream Restoration Projects: Learning from Past Projects to Improve Future Success

Ecological data were gathered from a network of 70 riparian restoration projects in Pennsylvania to facilitated future assessments of restoration outcomes. » Read More
Paul Kiry collects a sample

Sabine River Monitoring

This is the seventh of a series of biological and water quality surveys of the Sabine River near Longview, Texas. » Read More
A deteriorated 5 ft dam in York County, Pennsylvania

Ecological Effects of Small Dams

Potential ecological effects of dam removal across a range of dam and stream/watershed characteristics were studied in southeastern Pennsylvania and northeastern Maryland using ecological risk assessment. » Read More

Delaware Watershed Conservation Program

The Delaware Watershed Conservation Program (DWCP) is an innovative new approach to grant-making and environmental stewardship funded by the William Penn Foundation. DWCP is targeting subwatersheds to restore degraded ecological conditions and to protect areas that have high ecological value. » Read More

What's New in Research