A5021383723- Rangeland and Wildlife Management
- Wildlife Ecology and Conservation
- Indigenous Studies and Ecology
- Climate change and permafrost
- Cryospheric studies and observations
- Species Distribution and Climate Change
- Ecology and Vegetation Dynamics Studies
- Marine animal studies overview
- Arctic and Antarctic ice dynamics
- Geology and Paleoclimatology Research
- Arctic and Russian Policy Studies
- Fire effects on ecosystems
- Genetic and phenotypic traits in livestock
- Economic and Environmental Valuation
- Ecology and biodiversity studies
- Botany, Ecology, and Taxonomy Studies
- Hydrology and Watershed Management Studies
- Indigenous Health, Education, and Rights
- Climate Change, Adaptation, Migration
- Invertebrate Taxonomy and Ecology
- Geological Studies and Exploration
- Climate Change and Environmental Impact
- Animal Ecology and Behavior Studies
- Peatlands and Wetlands Ecology
- Coastal wetland ecosystem dynamics
United States Geological Survey
1999-2021
University of Alaska Fairbanks
2010-2021
Oklahoma State Regents for Higher Education
2021
Rothamsted Research
2018
Entertainment Industries Council
2014
Minnesota Department of Natural Resources
2012
University of Minnesota
2012
Wisconsin Disability Association
2010
Dartmouth College
2000
Oklahoma Biological Survey
1995
Surveys of recent (1973 to 1986) intentional releases native birds and mammals the wild in Australia, Canada, Hawaii, New Zealand, United States were conducted document current activities, identify factors associated with success, suggest guidelines for enhancing future work. Nearly 700 translocations each year. Native game species constituted 90 percent more successful (86 percent) than threatened, endangered, or sensitive (46 percent). Knowledge habitat quality, location release area...
In 1993 we conducted a follow‐up study of the 1987 survey by Griffith et al. (1989) 421 avian and mammalian translocation programs in North America, Australia, New Zealand to reassess programs’ status biological methodological factors associated with success. Our response rate was 81%. Approximately 38% usable reported change outcome from (e.g., translocated population “declining” but now is “self‐sustaining”), difference between overall success rates not statistically significant (66% 67%...
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To address recent criticisms of the recovery process U.S. Endangered Species Act and to search for ways improve efforts, we evaluated all plans approved by Fish Wildlife Service National Marine Fisheries as August 1991. As expected with rare species, found an overall lack detailed biological information presented in plans. Information on species’ distributions was most common, being mentioned 88% original plans, while abundance, population demographics, dynamics (in descending order) much...
During the past ∼50 years, number and area of lakes have declined in several regions boreal forests. However, there has been substantial finer-scale heterogeneity; some decreased area, showed no trend, others increased. The objective this study was to identify primary mechanisms underlying heterogeneous trends closed-basin lake area. Eight characteristics (δ18O, electrical conductivity, surface : volume index, bank slope, floating mat width, peat depth, thaw depth at shoreline, forest...
While the tendency to return previously visited locations-termed 'site fidelity'-is common in animals, cause of this behaviour is not well understood. One hypothesis that site fidelity shaped by an animal's environment, such animals living landscapes with predictable resources have stronger fidelity. Site may also be conditional on success animals' recent visits location, and it become age as animal accumulates experience their landscape. Finally, differences between species, way memory...
We synthesize findings from cooperative research on effects of petroleum development caribou (Rangifer tarandus granti) the Central Arctic Herd (CAH). The CAH increased about 6000 animals in 1978 to 23000 1992, declined 18 000 by 1995, and again 27 2000. Net calf production was consistent with changes herd size. In Kuparuk Development Area (KDA), west Prudhoe Bay, abundance calving less than expected within 4 km roads exponentially road density. With increasing infrastructure, high-density...
Climate-induced shifts in plant phenology may adversely affect animals that cannot or do not shift the timing of their reproductive cycle. The realized effect potential trophic "mismatches" between a consumer and its food varies with degree to which species rely on dietary income stored capital. Large Arctic herbivores heavily maternal capital reproduce give birth near onset growing season but are they vulnerable mismatch? We evaluated long-term changes temperatures characteristics seasons...
Abstract The ice formed by cold-season rainfall or rain on snow (ROS) has striking impacts the economy and ecology of Alaska. An understanding atmospheric drivers ROS events is required to better predict them plan for environmental change. spatially/temporally sparse network stations in Alaska makes studying such challenging, gridded reanalysis remote sensing products are necessary fill gaps. Recently developed dynamically downscaled climate data provide a new suite high-resolution variables...
Modeling the probability of use land units characterized by discrete and continuous measures, we present a Bayesian random-effects model to assess resource selection. This provides simultaneous estimation both individual- population-level Deviance information criterion (DIC), alternative AIC that is sample-size specific, used for Aerial radiolocation data from 76 adult female caribou (Rangifer tarandus) calf pairs during 1 year on an Arctic coastal plain calving ground were illustrate models...
Climate-related declines in lake area have been identified across circumpolar regions and characterized by substantial spatial heterogeneity. An improved understanding of the mechanisms underlying trends is necessary to predict where change most likely occur identify implications for high latitude reservoirs carbon. Here, using a population ca. 2300 lakes with statistically significant increasing decreasing spanning longitudinal latitudinal gradients 1000 km Alaska, we present evidence...
Petroleum and mineral exploration extraction, hydroelectric development, atmospheric transport of contaminants, timber harvesting tourism are increasing worldwide, especially in the Arctic. This development may adversely affect populations reindeer/caribou (Rangifer tarandus) which basis subsistence economies for northern indigenous peoples. Our purpose is to present a survey literature that has investigated response human activities. Individuals groups reindeer/caribou: 1) move away from...
Aerial treatment of naturally regenerating clearcuts with the herbicide glyphosate initially reduces availability deciduous browse, but may subsequently improve bedding cover for moose (Alces alces). However, potential effects these vegetative changes on use by has received little study. We studied in Maine (1) and (2) conifer during 2 periods, 1-2 7-11 years posttreatment. made counts tracks, beds, pellet groups transects treated untreated January-March 1992 1993 measured densities 1991-93....