In my current work, I am evaluating metrics to determine the effectiveness of channel restoration and am measuring the sources of carbon in the hydrologic cycle. I also am assessing alpine timberline advance by evaluating site temperature, site moisture, plant water relations, and stomatal conductance.
Multi-scales of hydrology, from water in individual plants to evaluation of water amount and quality in soils and stream systems; abiotic (nonliving) and biotic (living) linkages; and the role of disturbance in habitat and microsite creation.
My past research has focused on landslide initiation, runout, and deposition in old-growth, second-growth, clearcut, and yellow cedar decline forests; effects of landslide dam-break floods on channel morphology; and effects of disturbance on tree species, throughfall, and large woody debris recruitment in channels.
Why This Research is Important
My research is working toward an understanding of whole-system water relationships, which is integral to detecting influences of both management practices and climate change on water and forest pattern. A better understanding of factors influencing water can help us to develop improved restoration techniques and to guide strategies for planning into the future.
- Portland State University, Ph.D. Candidate Environmental Studies and Management, 2012
- Johns Hopkins University, M. A. Environmental Engineering, 1996
- University of Washington, M. S. Ecosystem Analysis, 1991
- Hartwick College, B. S. Geology, 1982
Featured Publications & Products
- Johnson, A.C.; Edwards, R.T.; Erhardt, R. 2007. Ground-water response to forest harvest: implications for hillslope stability.
- Gomi, Takashi; Johnson, Adelaide C.; Deal, Robert L.; Hennon, Paul E.; Orlikowska, Ewa H.; Wipfli, Mark S. 2006. Factors affecting distribution of wood, detritus, and sediment in headwater streams draining managed young-growth red alder-conifer forests in southeast Alaska.
- Wipfli, Mark S.; Deal, Robert L.; Hennon, Paul E.; Johnson, Adelaide C.; Edwards, Richard T.; De Santo, Toni L.; Gomi, Takashi; Orlikowska, Ewa H.; Bryant, Mason D.; Schultz, Mark E.; LeSage, Christian; Kimbirauskus, Ryan; D'Amore, David V. 2003. Compatible management of red alder-conifer ecosystems in southeastern Alaska..
- Haynes, Richard W.; Monserud, Robert A.; Johnson, Adelaide C. 2003. Compatible forest management: background and context..
- Monserud, Robert A.; Haynes, Richard W.; Johnson, Adelaide C. 2003. Chapter 17: the search for compatibility: what have we learned?.
Publications & Products
- Hennon, P.; D'Amore, D.; Wittwer, D.; Johnson, A.; Schaberg, P.; Hawley, G.; Beier, C.; Sink, S.; Juday, G. 2006. Climate warming, reduced snow, and freezing injury could explain the demise of yellow-cedar in southeast Alaska, USA.
- Johnson, Adelaide C.; Haynes, Richard W.; Monserud, Robert A., eds. 2002. Congruent management of multiple resources: proceedings from the Wood Compatibility Initiative workshop..
- Wipfli, Mark S.; Deal, Robert L.; Hennon, Paul E.; Johnson, Adelaide C.; de Santo, Toni L.; Hanley, Thomas A.; Schultz, Mark E.; Bryant, Mason D.; Edwards, Richard T.; Orlikowska, Ewa H.; Gomi, Takashi. 2002. Managing young upland forests in southeast Alaska for wood products, wildlife, aquatic resources, and fishes: problem analysis and study plan..
- Johnson, Adelaide C.; Wilcock, Peter. 1998. Effect of root strength and soil saturation on hillslope stability in forests with natural cedar decline in headwater regions of SE Alaska..