Current Research

In my current work, I assess geomorphic, hydrologic, and ecologic processes at locations ranging from timberline-alpine meadows to coastal shorelines. I evaluate the effects of natural and human disturbance on water, soil, plants, and aquatic habitats, and conduct mechanistic cross-discipline studies relevant to community well-being that address landslide disturbance, landform change, plant regeneration pattern, and species shifts.

Research Interests

• 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
• Role of disturbance in habitat and microsite creation

Past Research

My past research has included studies evaluating landslide initiation and deposition in old-growth, young-growth, clearcuts, and yellow cedar decline forests; effects of landslide dam-break floods on channel morphology; implications of disturbance on tree species, determination of throughfall quantity and quality, and quantification of large woody debris recruitment to channels; effects of post glacial land rebound on coastal communities; and evaluation of factors influencing forest resource quantity and value.

Why This Research is Important

My research works toward an understanding of whole-system water relationships; knowledge that is integral to detecting influences of both management practices and climate change on water and forest pattern. A better understanding of factors influencing water patterns can help enhance community resilience, guide adaptation plans, and improve restoration techniques.

Education

• Portland State University, Ph.D. Environmental Studies and Management 2013
• 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, Adelaide C.; Noel, James ; Gregovich, David P.; Kruger, Linda E.; Buma, Brian . 2019. Impacts of submerging and emerging shorelines on various biota and indigenous Alaskan harvesting patterns.
• Johnson, Adelaide C.; Bellmore, J. Ryan; Haught, Stormy ; Medel, Ronald . 2019. Quantifying the monetary value of Alaska national forests to commercial Pacific salmon fisheries.
• McDaniel, Josh ; Johnson, Adelaide ; Kruger, Linda . 2019. Sea levels rise and glaciers retreat: Changing subsistence lifestyles in southeast Alaska.
• Kruger, Linda E.; Johnson, Adelaide. 2017. Coastal climate change in Southeast Alaska Students aid in documenting local observations and experiences.
• Johnson, Adelaide Chapman; Yeakley, J. Alan. 2016. Seedling regeneration in the alpine treeline ecotone: Comparison of wood microsites and adjacent soil substrates.
• Buma, Brian; Johnson, Adelaide C. 2015. The role of windstorm exposure and yellow cedar decline on landslide susceptibility in southeast Alaskan temperate rainforests.
• 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..
• 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..

Publications

• Johnson, ; Yeakley, J. Alan. 2019. Microsites and climate zones: Seedling regeneration in the alpine treeline ecotone worldwide.
• Dhakal, Amod; Sidle, Roy C.; Johnson, A.C.; Edwards, R.T. 2008. Reply to discussion: ground water response to forest harvest: implications or hillslope stability.
• 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.
• Monserud, Robert A.; Haynes, Richard W.; Johnson, Adelaide C. 2003. Chapter 17: the search for compatibility: what have we learned.
• Haynes, Richard W.; Monserud, Robert A.; Johnson, Adelaide C. 2003. Compatible forest management: background and context..
• 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..