A5065057774- Avian ecology and behavior
- Fire effects on ecosystems
- Rangeland and Wildlife Management
- Species Distribution and Climate Change
- Ecology and Vegetation Dynamics Studies
- Animal Ecology and Behavior Studies
- Wildlife Ecology and Conservation
- Animal Behavior and Reproduction
- Yersinia bacterium, plague, ectoparasites research
- Landslides and related hazards
- Insect and Pesticide Research
Oregon Department of Fish and Wildlife
2022-2024
Oregon State University
2022-2024
Colorado State University
2015-2022
Minnesota Department of Natural Resources
2012
University of Minnesota
2012
Abstract Estimates of species' vital rates and an understanding the factors affecting those parameters over time space can provide crucial information for management conservation. We used mark–recapture, reproductive output, territory occupancy data collected during 1985–2013 to evaluate population processes Northern Spotted Owls (Strix occidentalis caurina) in 11 study areas Washington, Oregon, northern California, USA. estimated apparent survival, fecundity, recruitment, rate change, local...
Abstract Ecological disturbances shape and maintain natural communities, but climate change human land use can alter disturbance regimes affect population persistence vital rates in unpredictable ways. Species inhabiting landscapes shaped by wildfire have evolved mechanisms allowing them to persist under this dynamic type, which creates habitats of varying quality for these species. We utilized data from a 26‐yr demographic study northern spotted owls analyze the influence on apparent...
The northern spotted owl (Strix occidentalis caurina) inhabits older coniferous forests in the Pacific Northwest and has been at center of forest management issues this region. immediate threats to federally listed species include habitat loss competition with barred owls varia), which invaded from eastern North America. We conducted a prospective meta-analysis assess population trends factors affecting those using 26 years survey capture-recapture data 11 study areas across owls' geographic...
Slow ecological processes challenge conservation. Short-term variability can obscure the importance of slower that may ultimately determine state a system. Furthermore, management actions with slow responses be hard to justify. One response is explicitly concentrate analysis on dynamics. Here, we focus identifying drivers Northern Spotted Owl (Strix occidentalis caurina) territorial occupancy dynamics across 11 study areas spanning their geographic range and forecasting potential actions....
Many bird species do not make their own nests; therefore, selection of existing sites that provide adequate microclimates is critical. This particularly true for owls in north temperate climates often nest early the year when inclement weather common. Spotted use three main types structures, each which are structurally distinct and may varying levels protection to eggs or young. We tested hypothesis spotted owl configuration influences microclimate using both experimental observational data....
Marijuana (Cannabis spp.) growing operations (MGO) in California have increased substantially since the mid-1990s. One environmental side-effect of MGOs is extensive use anticoagulant rodenticides (AR) to prevent damage marijuana plants caused by wild rodents. In association with a long-term demographic study, we report on an observation brodifacoum AR exposure threatened species, northern spotted owl (Strix occidentalis caurina), found freshly dead within 669–1347 m at least seven active...
Western North American forest ecosystems are experiencing rapid changes in disturbance regimes because of climate change and land use legacies (Littell et al. 2018). In many these forests, the accumulation surface ladder fuels from a century fire suppression, coupled with warming drying climate, has led to increases number large fires (Westerling 2016) proportion areas burning at higher severity (Safford Stevens 2017, Singleton While annual area burned by is still below historical levels...
We conducted a range-wide investigation of the dynamics site-level reproductive rate northern spotted owls using survey data from 11 study areas across subspecies geographic range collected during 1993-2018. Our analytical approach accounted for imperfect detection owl pairs and misclassification successful reproduction (i.e., at least one young fledged) contributed further insights into population ecology dynamics. Both nondetection state were important, especially because factors affecting...
Wildfire activity throughout western North America is increasing which can have important consequences for species persistence. Native evolved disturbance-adapted traits that confer resilience to natural disturbance provided disturbances operate within their historical range of variability. This erode as regimes change and begin operating outside this range. We assessed wildfire impacts during 1987–2018 on the northern spotted owl, an imperiled with complex relationships late early seral...
First posted May 24, 2023 For additional information, contact: Director, Forest and Rangeland Ecosystem Science Center777 NW 9th StreetSuite 400Corvallis, OR 97330 The northern spotted owl (Strix occidentalis caurina; hereinafter NSO) was listed as “threatened” under the Endangered Species Act in 1990 population declines have continued since that listing. Given species’ protected status, any proposed activities on Federal lands might impact NSO require consultation with U.S. Fish Wildlife...