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Patricia Muir

Patricia Muir

Professor Emeritus, 
Ph.D., 1984, University of Wisconsin, Madison


Office/Lab: Cordley 1096/1108
Phone: 541-737-1745/1746


Research Area

Effects of land management practices on plant population and community ecology; effects of air pollutants on plants; chemistry of fogwater; fire ecology.

Description of Research

My research interests focus on effects of human activities on plants.I study effects of alternative logging methods on forest productivity and diversity I also study effects of air pollutants on plants in the field and in controlled environments. 
I am working with two graduate students to assess consequences of various fuel reduction methods for native and exotic plants in oak woodlands and shrub lands of SW Oregon. We are also carrying out "historical sleuthing," to try to understand pre-European settlement conditions of vegetation in this area and to learn what, if any, changes in vegetation have been caused by fire suppression in the area.
My current research also focuses on the commercial moss harvest industry in Appalachian and PNW forests.


BI 301 Human Impacts on Ecosystems
BI 371 Ecological Methods

Related Links

OSU Poster

Environmental Sciences at Oregon State University

Pat's website

Selected Publications

Muir, P.S. 1991. Fogwater chemistry in a woodburning community, western Oregon. Internat. J. Air Waste Managem. Assoc. 41:32-38.

Muir, P.S. 1993. Disturbance effects on structure and tree species composition of Pinus contorta forests in western Montana. Can. J. For. Res. 23:1617-1625.

Muir, P.S. and A.M. Shirazi. 1996. Effects of formaldehyde-enriched mists on Pseudotsuga menzesii (Mirbel) Franco and Lobaria pulmonaria (L.) Hoffm. Environmental Pollution 94: 227-234

Shirazi, A.M., P.S. Muir and B. McCune. 1996. Environmental factors influencing the distribution of the lichens Lobaria oregana and Lobaria pulmonaria. The Bryologist 99: 12-18

Rose, C. R. and P.S. Muir. 1997. Green-tree retention:consequences for timber production in forests of the western Cascades, Oregon. Ecological Applications 71(1): 209-217

Traut, B.H. and P.S. Muir. 2000. Relationships of remnant trees to vascular undergrowth communities in the western Cascades: A retrospective Approach. Northwest Science 74: 212-223.

Peck, J.E. and P.S. Muir. 2001. Harvestable epiphytic bryophytes and their accumulation in central western Oregon. The Bryologist 104: 181 - 190.

Keon, D.B. and P.S. Muir. 2002. Growth of Usnea longissima across a variety of habitats in the Oregon Coast Range. The Bryologist 105: 233 -242.

Muir, P.S., R.L. Mattingly, J.C. Tappeiner, J.D. Bailey, W.E. Elliott, J.C. Hagar, J.C. Miller, E. B. Peterson, and E.E. Starkey. 2002. Managing for biodiversity in young Douglas-fir forests of western Oregon. Biological Sciences Report USGS/BRD/BSR-2002-006. 76 pp.

Menke, C.A. and P.S. Muir. 2004. Patterns and influences of exotic species invasion into the grassland habitat of the threatened plant Silene spaldingii. Natural Areas Journal 24:119-128

Muir, P.S., K.N. Norman and K.G. Sikes.  2006.  Quantity and value of commercial moss harvest from forests of the Pacific Northwest and Appalachian regions of the U.S.  The Bryologist 109 (2):  197-214.

Muir, P.S., T. R. Rambo, R.W. Kimmerer and D.B. Keon.  2006.  Influence of overstory removal on growth of epiphytic mosses and lichens in western Oregon.  Ecological Applications 16(3): 1207-1221.

Peck, J.E. and P.S. Muir. 2007. Conservation management of the mixed species nontimber forest product of “moss” - Are they harvesting what we think they’re harvesting? Biodiversity Conservation, 16:2031-2043

Perchemlides, K.A., P.S. Muir, and P. Hosten.  2008.  Responses of chaparral and oak woodland plant communities to fuel-reduction thinning in southwestern Oregon . Journal of Range Ecology and Management. 61:  98-109.

Peck, J.E. and P.S. Muir.  2008.  Biomass inventory and regrowth rate of harvestable tree and shrub moss in the Oregon Coast Range .  Western Journal of Applied Forestry 23: 34-39.

Sikes, K.G. and P.S. Muir. 2009. Influence of two fuel reduction treatments on chaparral communities of southwestern OR. Madrono 56: 8-22.

Duren, O.C. and P.S. Muir. 2010. Does fuels management accomplish restoration in southwest Oregon, USA, chaparral? Insights from age structure. Fire Ecology 6(2): 76-96.

Gilligan, L.A. and P.S. Muir.  2011.  Stand structures of Oregon white oak woodlands, regeneration, and their relationships to the environment in Southwestern Oregon.  Northwest Science 85: 141-158.

Duren, O.C., P.S. Muir, and P. E. Hosten.  2012.  Vegetation change from the Euro-American settlement era to the present in relation to environment and disturbance in southwest Oregon.  Northwest Science86(4): 310 - 328.

Gray, Erin C. and Patricia S. Muir. 2013. Does Kochia prostrata Spread From Seeded Sites? An Evaluation From Southwestern Idaho, USA. Rangeland Ecology & Management, 66(2):191-203.