Overview
Christensen's research focuses on the effects of disturbance on structure and function of populations, communities and ecosystems. On going studies include an analysis of patterns of forest development following cropland abandonment as these are affected by environment, stand history and plant demographic patterns. He and his students are pursuing comparative studies of ecosystem responses to varying fire regimes across temperate North America. He is conducting research on the utilization of remote sensing systems such as synthetic aperture radar to evaluate long-term changes in forest ecosystems. In addition to these interests in basic ecological science, Christensen has written widely on the importance of natural disturbance in the management of forests, shrublands, and wetlands. He is interested in the application of basic ecological theory and models to management, and has collaborated with others in the development of the concept of ecosystem management.
Current Appointments & Affiliations
Professor Emeritus in the Division of Environmental Sciences and Policy
·
2014 - Present
Environmental Sciences and Policy,
Nicholas School of the Environment
Recent Publications
Ecosystem-based management for military training, biodiversity, carbon storage and climate resiliency on a complex coastal land/water-scape.
Journal Article Journal of environmental management · February 2021 The Defense Coastal/Estuarine Research Program (DCERP) was a 10-year multi-investigator project funded by the Department of Defense to improve understanding of ecosystem processes and their interactions with natural and anthropogenic stressors at the Marin ... Full text CiteWhite-sand Ecosystems in Amazonia
Journal Article Biotropica · January 1, 2016 Vegetation on sandy soils, ranging from open grasslands and shrublands to closed-canopy, thin-trunked forests, can be found in patches throughout the Amazon. Despite variation in names, appearance, ecological correlates, and suggested origins, these 'white ... Full text CitePatterns of vegetation composition and diversity in pine-dominated ecosystems of the Outer Coastal Plain of North Carolina: Implications for ecosystem restoration
Journal Article Forest Ecology and Management · November 15, 2015 Terrestrial ecosystems of the Atlantic coastal plain have experienced considerable change over the past two centuries, largely due to agricultural activities and fire suppression and exclusion. Many areas that were once dominated by open longleaf pine (Pin ... Full text CiteRecent Grants
Forest Management, Species Habitat, and Implications for Carbon Flux and Storage
ResearchPrincipal Investigator · Awarded by Research Triangle Institute · 2012 - 2017Fire History Among Southern Appalachian Forest Types
ResearchPrincipal Investigator · Awarded by Department of Agriculture · 2004 - 2006Monitoring and modeling the response of coastal ecosystems and carbon storage to rising sea level
FellowshipPrincipal Investigator · Awarded by National Aeronautics and Space Administration · 2002 - 2005View All Grants
Education, Training & Certifications
University of California, Santa Barbara ·
1973
Ph.D.
California State University, Fresno ·
1970
M.A.
California State University, Fresno ·
1968
B.A.