Evan Frost - Academia.edu (original) (raw)
Evan Frost is a terrestrial ecologist, conservation scientist, botanist and environmental consultant with over twenty five years of experience at the interface of science, land management and conservation policy in the western United States. In his capacity as both conservation scientist and consultant, he has been involved with a wide diversity of organizations, projects and initiatives, ranging from landscape-scale biodiversity assessments to individual species conservation plans and site-specific land stewardship projects. Areas of expertise include environmental assessment, fire and forest ecology, conservation planning, rare species inventory and monitoring, climate change impacts and adaptation, wildlife habitat management and restoration. Throughout his career, Evan has worked with a diverse clientele and delivered quality products ranging from peer-reviewed scientific research publications to successful on-the-ground conservation actions.
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Published Studies & Reports by Evan Frost
The Cascade-Siskiyou National Monument includes a wide range of slope, elevation, soil types, and... more The Cascade-Siskiyou National Monument includes a wide range of slope, elevation, soil types, and historic management activities. Calochortus greenei occupies a wide range of habitats primarily defined by topographic and edaphic factors. Several environmental factors are confounded with patterns of livestock use, making it difficult to separate the influence of individual factors. The inclusion of many environmental variables in multivariate models with little predictive power suggests that few generalizations about C. greenei abundance relative to environmental factors are valid across the larger landscape. Distance from vegetation edge was an important biotic variable incorporated in models of C. greenei population density across the landscape, suggesting that ecotones between soil types may play a role in defining suitable habitat. The varied localized influence of edaphic factors may indicate their indirect importance to C. greenei habitat by controlling the expression of mixed ...
Conservation Biology, 2004
This report presents new information documenting ‘Lands with Wilderness Character’ (LWC) in the G... more This report presents new information documenting ‘Lands with Wilderness Character’ (LWC) in the Green Springs Mountain Wild Area, as defined in BLM Manual 6310 “Conducting Wilderness Characteristics Inventory on BLM Lands”. This report meets Manual 6310’s minimum requirements for consideration by the BLM (.06 B. 1.b.) and differs significantly from information and findings of BLM inventories completed prior to the March 15, 2012 issuance of BLM Manual 6310.
The Cascade-Siskiyou National Monument includes a wide range of slope, elevation, soil types, and... more The Cascade-Siskiyou National Monument includes a wide range of slope, elevation, soil types, and historic management activities. Calochortus greenei occupies a wide range of habitats primarily defined by topographic and edaphic factors. Several environmental factors are confounded with patterns of livestock use, making it difficult to separate the influence of individual factors. The inclusion of many environmental variables in multivariate models with little predictive power suggests that few generalizations about C. greenei abundance relative to environmental factors are valid across the larger landscape. Distance from vegetation edge was an important biotic variable incorporated in models of C. greenei population density across the landscape, suggesting that ecotones between soil types may play a role in defining suitable habitat. The varied localized influence of edaphic factors may indicate their indirect importance to C. greenei habitat by controlling the expression of mixed ...
Conservation Biology, 2004
This report presents new information documenting ‘Lands with Wilderness Character’ (LWC) in the G... more This report presents new information documenting ‘Lands with Wilderness Character’ (LWC) in the Green Springs Mountain Wild Area, as defined in BLM Manual 6310 “Conducting Wilderness Characteristics Inventory on BLM Lands”. This report meets Manual 6310’s minimum requirements for consideration by the BLM (.06 B. 1.b.) and differs significantly from information and findings of BLM inventories completed prior to the March 15, 2012 issuance of BLM Manual 6310.
Pages 71-80 in: K.L. Mergenthatler, J.E. Williams, and E. S. Jules eds. Proceedings of the Second Conference on Klamath-Sisikiyou Ecology, Cave Junction, OR. May, 2003. , 2004
Fires have been important in the Klamath-Siskiyou for millennia. Where burn severities are mixed... more Fires have been important in the Klamath-Siskiyou for millennia. Where burn severities are mixed, as they are in much of the Klamath-Siskiyou, fires may be instrumental in creating landscape heterogeneity. Landscape heterogeneity is linked to structural and taxonomic diversity, for which the Klamath-Siskiyou region is renowned. We recently analyzed spatial patterns of fire severity in a 98,814 ha area burned in 1987 to evaluate
the role of fire in creating landscape diversity. The study area was in the Marble and Trinity Mountains area, which is dominated by Douglas-fir and tanoak forests. We found that fire severity was mostly low (59% of the area), but that patchy high severity fire (12% percent of the area) also occurred. In forests and sclerophyll vegetation where fire had been previously absent for many decades less high severity fire was found, whereas those that had burned previously in prior decades had more high severity fire. Therefore, the length of fire-free intervals can influence the production of high severity patches in
the landscape. Fire interval may also determine the persistence of these patches, which return to forest vegetation following many decades without stand-replacing fire. The high degree of spatial and temporal variation in fire in our study area results in a landscape of complex and dynamic patches of differing ages. Patch dynamics differ in landscapes containing even-aged plantations. We found these burned with twice the
severity of closed forests. Positive feedback between plantations and fire, and the persistence of plantations over fire intervals of any length favor the filling in of
landscapes with structurally and biologically simplified vegetation.
Proceedings of the Second Conference on Klamath-Siskiyou Ecology, Cave Junction, OR, May 29-31, 2003, 2004
Nature has No Borders: Proceedings of a Conference on the Protection and Management of the North Cascades Ecosystem. March 25-27, 1994, Seattle, WA., 1994
. Pp. 66-73 in:
Connections: Proceedings from the First Conference of the Yellowstone to Yukon Conservation Initiative. Canmore, Alberta, 1998
Proceedings of the Symposium on Biodiversity of Northwestern California. October 28-30, 1991, Santa Rosa, CA. Wildland Resources Center Report #29, University of California, Berkeley, CA. , 1992
R.R. Harris, D.C. Erman, and H.M. Kerner, eds.
Proceedings of the First Conference on Siskiyou Ecology. May 29-June 1, 1997, Kerby, OR, 1997