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Northern Research Station
11 Campus Blvd., Suite 200
Newtown Square, PA 19073
(610) 557-4017
(610) 557-4132 TTY/TDD

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Ecophysiological Processes


The Northern Research Station has realigned our staff from 37 Research Work Units and Programs into 14 new Research Work Units.

RWU-4158 is now part of NRS-13, Institute for Applied Ecosystem Studies: Theory and Application of Scaling Science in Forestry.

Our Mission

To increase our knowledge of physiological processes that control the growth of northern forest trees and determine their response to environmental stresses.


Our research focuses on :

  • Developing a more complete understanding of how a changing global atmospheric environment affects the functioning of forest trees and ecosystems.
  • Understanding physiological and biochemical mechanisms related to tree-stress responses.
  • Identifying critical physiological and genetic processes that can be used as the bases for new forest management practices.

In order to understand the real-time status of productivity in terms of net ecosystem exchange (NEE) for CO2, and create the knowledge (data) base for surface-level fluxes of energy, water, and carbon in various types of forests, we collaborate in the Chequamegon Ecosystem-Atmosphere Study (ChEAS) consists of a cluster of eddy covariance towers for continuous monitoring of energy, water vapor, and carbon dioxide fluxes between forest ecosystems and the atmosphere. Towers are located at various study sites in northern Wisconsin at the Chequamegon-Nicolet National Forest, where flux measurements are obtained at various spatial scales (e.g., landscape and stand level). The ChEAS flux towers are a part of the continental (AmeriFlux) and global (FluxNet) network of flux study sites.

More Information

This site is under development as the Forest Service brings together the Northeastern and North Central Research Stations to form the Northern Research Station, serving the Northeast and Midwest. Check back often as we expand our site to reflect our combined commitment to supporting the natural resources and people of the Northeastern and Midwestern United States.

For more details about our research visit

For more about the Aspen Free Air CO2 and O3Enrichment (FACE) project visit

Last Modified: 12/21/2007