Major disturbance agents and stressors such as insects, diseases, invasive plant species, air pollution, and fire are among the most powerful influences on the structure, species composition, and ecological function of forests.
Disturbance can have both detrimental and beneficial effects on forest ecosystems. The frequency and severity of damage by biotic agents, such as insects or diseases, or abiotic agents, such as fire or weather, are influenced by a number of factors, ranging from the existing composition and structure of the forest to management policies and activities.
- Deploying initial attack resources for wildfire suppression: spatial coordination, budget constraints, and capacity constraints. Canadian Journal of Forest Research. 43(1): 56-65. - Lee, Yohan; Fried, Jeremy S.; Albers, Heidi J.; Haight, Robert G. 2013
- Host-parasite distributions under changing climate: Tsuga heterophylla and Arceuthobium tsugense in Alaska. Canadian Journal of Forest Research 42: 642-656. - Barrett, Tara M.; Latta, G., Hennon, P.E., Eskelson, B.N.I., and Temesgen, H. 2012
- Estimating forest biomass and identifying low-intensity logging areas using airborne scanning lidar in Antimary State Forest, Acre State, Western Brazilian Amazon. Remote Sensing of Environment. 124: 479-491. - d'Oliveira, Marcus V.N.; Reutebuch, Stephen E.; McGaughey, Robert J.; Andersen, Hans-Erik 2012
- Canopy gaps affect long-term patterns of tree growth and mortality in mature and old-growth forests in the Pacific Northwest. Forest Ecology and Management. 281: 111-120. - Gray, Andrew N.; Spies, Thomas A.; Pabst, Robert J. 2012
- Epiphytic macrolichen community composition database - epiphytic lichen synusiae in forested areas of the US. Biodiversity and Ecology 4: 439-439. - Jovan, Sarah 2012
- Eutrophic lichens respond to multiple forms of N: implications for critical levels and critical loads research. Ecological Applications. 22(7): 1910-1922. - Jovan, Sarah; Riddell, Jennifer; Padgett, Pamela E; Nash, Thomas 2012
- Regional distribution of introduced plant species in the forests of the northeastern corner of the United States. Potter, K.M.; Conkling, B.L., eds.. Draft Forest Health Monitoring 2011 National Technical Report, Version 1/20/2012. Washington, DC: U.S. Department of Agriculture, Forest Service, Forest Health Monitoring Program. 123 p. - Schulz, B.; Moser, W.K.; Olson, C; and Johnson, K. 2012
- Potential of a national monitoring program for forests to assess change in high-latitude ecosystems. Biological Conservation. 144: 1285-1294. - Barrett, Tara M.; Gray, Andrew N. 2011
- Forest health monitoring: 2007 national technical report. Gen. Tech. Rep. SRS-147. Asheville, NC: U.S. Department of Agriculture Forest Service, Southern Research Station. 159 p. - Conkling, Barbara L. 2011
- Nonnative invasive plants of Pacific coast forests: a field guide for identification. Gen. Tech. Rep. PNW-GTR-817. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 91 p. - Gray, Andrew N.; Barndt, Katie; Reichard, Sarah H. 2011
- Northwest Forest Plan -- status and trends of late-successional and old-growth forests from 1994 to 2008. PNW-GTR-853. Pacific Northwest Research Station, USDA Forest Service, Portland, OR; 48 p. - Moeur, M.M.; Ohmann, J.L.; Kennedy, R.E.; Cohen, W.B.; Yang, Z.; Gregory, M.J.; Roberts, H.M.; Fiorella, M. 2011
- Canaries in a coal mine: using lichens to measure nitrogen pollution. Science Findings 131. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 5 p. - Oliver, Marie 2011
- Biological control reduces growth, and alters water relations of the saltcedar tree (Tamarix spp.) in western Nevada, USA. Journal of Arid Environments. 75: 346-685. - Pattison, R.R.; D'Antonio, C.M.; Dudley, T.L. 2011
- Tracking lichen community composition changes due to declining air quality over the last century: the Nash legacy in Southern California. Bibliotheca Lichenologica 106: 263-277. - Riddel J., Jovan S., Padgett P., Sweat K. 2011
- Status and future of the forest health indicators program of the USA. Environmental Monitoring and Assessment. 177: 419-436. - Woodall, Christopher William; Amacher, Michael C.; Bechtold, William A.; Coulston, John W.; Jovan, Sarah; Perry, Charles H.; Randolph, KaDonna C.; Schulz, Beth K.; Smith, Gretchen C.; Tkacz, Borys; Will-Wolf, Susan. 2011
Researchers are working on improving predictions of wildfire severity from stand structure and composition and fire weather conditions.
Management to reduce fire hazards and potential availability of biomass for wood products and energy production given management objectives and constraints.
- Insects and disease
Effects of insect outbreaks and diseases on forest characteristics and species health.
- Invasive species
Invasive plant distribution and abundance and associations with forest conditions and history.
- Air pollution
Predicting impacts from nitrogen pollution on forests through lichen monitoring.