Sonoran Desert Field Station

halvor@srnr.arizona.edu - e-mail

Links:

Renewable Natural Resources University of Arizona
USGS BRD - National Biological Infrastructure

Educational Experience:

B.S., Botany, Arizona State University, 1965

M.S., Botany, University of Illinois, 1967

Ph.D., Botany, Arizona State University, 1970

Areas of interest and expertise:

Ecosystem Management

Vegetation Science

Plant Population Biology

Natural Area Management

Monitoring of Natural Resources

Social Science Applied to Natural Resources Managememt

Restoration Ecology

Recent Publications:

Halvorson, W. L., D. B. Fenn, and W. R. Allardice. 1988. Soils and vegetation of Santa Barbara Island, Channel Islands National Park, CA. Environmental Management 12: 109-118.

Halvorson, W. L. and R. E. Koske. 1988. Coastal Dunes. In: R. G. Sheath and M. M. Harlin (eds). Freshwater and Marine Plants of Rhode Island. Kendall/Hunt Publishing Co., Dubuque, IA.

Davis, G. E. and W. L. Halvorson. 1989. An 'HMO' for Channel Islands national Park. A'lul'quoy 2(1): 14.

Davis, G. E. and W. L. Halvorson. 1989. Why monitor park health? Park Science 9(3): 16-17.

Halvorson, W. L. and R. A. Clark. 1989. Vegetation and floristics of Pinnacles National Monument. University of California, Davis, Cooperative Park Studies Unit, Technical Report No. 34.

Koske, R. E. and W. L. Halvorson. 1989. Mycorrhizal associations of selected species from San Miguel Island, Channel Islands National Park, California. Pacific Science 43:32-40.

Clark, R. A. and W. L. Halvorson. 1990. Endangered and rare plants of Santa Barbara Island, Channel Islands National park. University of California, Cooperative Park Studies Unit, Technical Report No. 37.

Clark, R. A., W. L. Halvorson, A. A. Sawdo, and K. C. Danielsen. 1990. Plant communities of Santa Rosa Island, Channel Islands National Park. University of California, Cooperative Park Studies Unit, Technical Report No. 42.

Danielsen, K. C. and W. L. Halvorson. 1990. Valley oak restoration: a community approach. Fremontia 18(3): 52.

Erickson, W. A. and W. L. Halvorson. 1990. Ecology and control of the black rat (Rattus rattus) in Channel islands National Park. University of California, Cooperative Park Studies Unit, Technical Report No. 38.

Erickson, W. A., R. E. Marsh, and W. L. Halvorson. 1990. A roof rat bait station that excludes deer mice. Wildlife Society Bulletin 18: 319-325.

Koske, R. E. and W. L. Halvorson. 1990. Scutellospora arenicola and Glomus trimurales: Two new species in the Endogonaceae. Mycologia 81(6): 927-933.

Danielsen, K. C. and W. L. Halvorson. 1991. Valley oak seedling growth associated with selected grass species. Pp 9-13 in R. B. Standiford (Tech. Coord.), Proceedings of the symposium on oak woodlands and hardwood range management, UCDavis, Oct. 31 - Nov. 2., 1990. U.S. Forest Service Gen. Tech. Report PSW-126. Pacific Southwest Research Station, Berkeley, CA.

Halvorson, W. L. 1991. Standards and monitoring, progress in wetlands. Restoration and Management Notes 9(2): 87-89.

D'antonio, C. M. W. L. Halvorson, and D. B. Fenn. 1992. Restoration of denuded areas and iceplant areas on Santa Barbara Island, Channel Islands National Park. University of California, Cooperative Park Studies Unit, Technical Report No. 46.

Halvorson, W. L., R. A. Clark, and C. R. Soiseth. 1992. Rare plants of Anacapa, Santa Barbara, and San Miguel in Channel Islands National Park. University of California, Cooperative Park Studies Unit, Technical Report No. 47.

Halvorson, W. L. 1992. Alien plants at Channel Islands National Park. Pp 64-96 in Stone, C.P., C. W. Smith, and J. T. Tunison (eds) Alien plant invasions in native ecosystem of Hawai'i: Management and research. University of Hawaii, Cooperative National Park Resources Unit, Honolulu.

Halvorson, W. L. 1993. Restoration of process and function on the California Channel Islands. Pp 283-288 in Keeley, J. E. (ed). Interface between ecology and land development in California. Southern California Academy of Sciences, Los Angeles.

Davis, G. E., K. R. Faulkner, and W. L. Halvorson. 1994 Ecological Monitoring in Channel Islands National Park, California. Pp 465-482 in Halvorson, W. L. and G. L. Maender (eds.), Fourth California Islands Symposium: Update on the Status of Resources. Santa Barbara Museum of Natural History, Santa Barbara, CA. 530 p.

Halvorson, W. L. 1994. Ecosystem restoration on the California Channel Islands. Pp 485-490 in Halvorson, W. L. and G. L. Maender (eds.), Fourth California Islands Symposium: Update on the Status of Resources. Santa Barbara Museum of Natural History, Santa Barbara, CA. 530 p.

Halvorson, W. L., D. K. Chickering, M. N. Jensen, and L. Novickis. 1994. Social science research plan: Lake Mead National Recreation Area. University of Arizona, Cooperative Park Studies Unit, Special Technical Report, 63 p.

Halvorson, W. L. and G. L. Maender (eds.). 1994. Fourth California Islands Symposium: Update on the Status of Resources. Santa Barbara Museum of Natural History, Santa Barbara, CA. 530 p.

Halvorson, W. L., L. H. Robbins, D. Meko, and J. Betancourt. 1995. Global Change Research Program, Sonoran Desert, 1994 Annual Report. University of Arizona, Cooperative park Studies Unit, Special Technical Report, 43 p.

Junak, S., W. L. Halvorson, C. Schwemm, and T. Keeney. 1995. Sensitive Plants I, San Nicolas Island, Channel Island, California. University of Arizona, Cooperative Park Studies Unit, Technical Report No. 51

Briggs, M. K., L. Harris, J. Howe, and W. Halvorson. 1996. Using Long Term Monitoring to Understand how Adjacent Land Development Affects Natural Areas. Natural Areas Journal (in press)

Davis, G. E. and W. L. Halvorson. 1996. Long-term Research in National Parks: From Beliefs to knowledge. Pp 3-10 in Halvorson, W. L. and G. E. Davis (eds). Science and Ecosystem Management in the National Parks. The University of Arizona Press, Tucson. 362 p.

Davis, G. E. and W. L. Halvorson. 1996. Resource Issues Addressed by Case Studies of Sustained Research in National Parks. Pp 321-333 in Halvorson, W. L. and G. E. Davis (eds). Science and Ecosystem Management in the National Parks. The University of Arizona Press, Tucson. 362 p.

Halvorson, W. L. and G. E. Davis. 1996. Lessons Learned from a Century of Applying Research Results to Management of National Parks. Pp. 334-344 in Halvorson, W. L. and G. E. Davis (eds). Science and Ecosystem Management in the National Parks. The University of Arizona Press, Tucson. 362 p.

Halvorson, W. L. and G. E. Davis (eds). 1996. Science and Ecosystem Management in the National Parks. The University of Arizona Press, Tucson. 362 p.

Halvorson, W. L. 1997. Changes in Landscape Values and Expectations: What do we Want and How do We Measure it? Chapter 2 in Wright, G. and D. Mattson (eds). The Role of Parks and Protected Areas in Protecting Biodiversity and Critical Resources. Blackwell Science, Inc. (in press)

Organizations and Committees:

American Forestry Association (member)

Arizona-Nevada Academy of Science

California Botanical Society (member)

Ecological Society of America (member)

National Park Service Inventory and Monitoring Program Steering Committee (member)

Sigma Xi (member)

Society for Ecological Restoration (Treasurer)

Southwestern Association of Naturalists (member)

Address/Phone:

Dr. William L. Halvorson

USGS Sonoran Desert Field Station - University of Arizona

125 Biological Sciences East

University of Arizona

Tucson, AZ 85721

(520) 670-6885

(520) 621-1174

(520) 670-5001 - FAX

halvor@srnr.arizona.edu - e-mail