A5049767498- Avian ecology and behavior
- Animal Vocal Communication and Behavior
- Wildlife Ecology and Conservation
- Fire effects on ecosystems
- Species Distribution and Climate Change
- Music and Audio Processing
- Rangeland and Wildlife Management
- Diverse Musicological Studies
- Ecology and Vegetation Dynamics Studies
- Animal Behavior and Reproduction
- Marine animal studies overview
- Botany and Geology in Latin America and Caribbean
- Hemiptera Insect Studies
- Remote Sensing and LiDAR Applications
- Forest ecology and management
- Geology and Paleoclimatology Research
- Bat Biology and Ecology Studies
- Economic and Environmental Valuation
- Identification and Quantification in Food
- Diptera species taxonomy and behavior
- Human-Animal Interaction Studies
- Lepidoptera: Biology and Taxonomy
- Forest Management and Policy
- Plant and animal studies
- Ecology and biodiversity studies
Pacific Northwest Research Station
2017-2024
Protein Metrics (United States)
2024
Oregon Department of Fish and Wildlife
2024
Oregon State University
2024
Google (United States)
2024
Government of the United States of America
2022
US Forest Service
2017-2021
University of Missouri
2016-2017
Pacific Environment
1993-2006
PG&E Corporation (United States)
1993-2006
Abstract Coexistence of ecologically similar species can be maintained by partitioning along one or more niche axes. Three-dimensional structural complexity is central to facilitating resource between many forest species, but underrepresented in field-based studies. We examined selection sympatric northern spotted owls ( Strix occidentalis caurina ), a threatened under the US Endangered Species Act, and nonnative barred S . varia ) western Oregon, USA explore relative importance canopy...
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...
Population monitoring is an essential component of biodiversity conservation and management, but low detection probabilities for rare and/or cryptic species makes estimating abundance occupancy challenging. Passive acoustic combined with machine learning algorithms represents a potential path forward to effectively efficiently monitor the occurrence vocalizing across entire forest landscapes. Our objectives were develop implement convolutional neural network (PNW-Cnet) identify vocalizations...
Journal Article Mate and Nest Site Fidelity in a Resident Population of Bald Eagles Get access J. Mark Jenkins, Jenkins Technical Ecological Services, Pacific Gas Electric Company, 3400 Crow Canyon Road, San Ramon, CA 94583 Search for other works by this author on: Oxford Academic Google Scholar Ronald E. Jackman BioSystems Analysis Inc., P.O. Box 776, Fall River Mills, 96028 The Condor, Volume 95, Issue 4, 1 November 1993, Pages 1053–1056, https://doi.org/10.2307/1369447 Published: 01 1993...
Strix occidentalis caurina es una especie de interés para la gestión y conservación en región noroeste del Pacífico los EEUU donde sus poblaciones han sido seguidas desde década 1990 mediante métodos marcado reavistamiento. El monitoreo acústico pasivo tiene el potencial apoyar esfuerzos seguimiento; sin embargo, su uso está principalmente restringido a determinar presencia especies lugar estatus reproductivo. Distinguir las vocalizaciones entre hembras machos S. o. utilizando acústicos...
Abstract Dispersal among breeding sites in territorial animals (i.e. dispersal) is driven by numerous selection pressures, including competition and spatiotemporal variation habitat quality. The scale trend of dispersal movements over time may signal changing conditions within the population or on landscape. We examined 2,158 events from 694 male 608 female individually marked Northern Spotted Owls (Strix occidentalis caurina) monitored 28 yr 7 study areas to assess relative importance...
Breeding dispersal, the movement from one breeding territory to another, is rare for philopatric species that evolved within relatively stable environments, such as old-growth coniferous forests of Pacific Northwest. Although dispersal not inherently maladaptive, consequences increased on population dynamics in populations whose historical rates are low could be significant, particularly a declining species. We examined and possible causes based sample 4,118 northern spotted owls (Strix...
ABSTRACT The federally threatened northern spotted owl ( Strix occidentalis caurina ) has been intensively studied across its range, and habitat needs for the species have influenced forest management in northwestern North America decades. Dense canopies are often reported scientific literature agency plans as an important attribute owls, though means of measuring canopy interpreting requirements vary studies more importantly, among plans. We used light detection ranging (lidar) measurements...
We can improve our ability to assess population viability and forecast growth under different scenarios by understanding factors that limit parameters in each stage of the annual cycle. Postfledging mortality rates may be as variable nest survival across regions fragmentation gradients, although negatively impact affect postfledging individuals ways. examined Ovenbirds (Seiurus aurocapilla) Acadian Flycatchers (Empidonax virescens) mature forest fragments central Missouri. used an...
ABSTRACT Postfledging survival of neotropical migrant songbirds has been linked to seasonal and annual changes in the environment individual condition. Understanding what influences variation postfledging movements may provide insight into differential value habitat across life‐history stages. We conducted a radio‐telemetry study ovenbirds ( Seiurus aurocapilla ; n = 45) Acadian flycatchers Empidonax virescens 62) mature‐forest fragments from 2012 2015 Missouri, USA. documented variability...
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...
We present PNW-Cnet v4, a deep neural net with an associated Shiny-based application designed to facilitate efficient data processing detect terrestrial wildlife species through passive acoustic monitoring. v4 is convolutional network that detects audio signatures of 37 focal birds and mammals inhabit forests the Pacific Northwest, USA, along other commonly occurring forest sounds. The primary objective developing was support long-term northern spotted owl (Strix occidentalis caurina)...
Journal Article Natural History of the Guam Rail Get access J. Mark Jenkins Division Aquatic and Wildlife Resources, Department Agriculture, P.O. Box 23367, GMF Guam, Mariana Islands 96921 Search for other works by this author on: Oxford Academic Google Scholar The Condor, Volume 81, Issue 4, 1 November 1979, Pages 404–408, https://doi.org/10.2307/1366967 Published: 01 1979 history Accepted: 30 May
Habitat selection is a fundamental component of community ecology, population and evolutionary biology can be especially important to species with complex annual habitat requirements, such as migratory birds. Resource preferences on the breeding grounds may change during postfledging period for migrant songbirds, however, degree which changes, timing change, whether all or only few alter their resource use unclear. We compared nest sites by juvenile ovenbirds (Seiurus aurocapilla) Acadian...
Wildlife monitoring programs designed to inform forest management and conservation decisions in the face of climate change benefit from long-term datasets with consistent methodology. Nevertheless, many may seek transition alternative methods because emerging technologies can improve trend tracking expand number target populations, increase spatial scale, reduce costs. Integrated models strengthen capacity adapt next generation methods. Here we present a case study northern spotted owl (...
Abstract The tayra ( Eira barbara ) is a common and broadly distributed Neotropical carnivore, yet not well‐studied. While this species apparently associated with forested habitats, it also appears tolerant of some anthropogenic disturbance. We deployed 57 unbaited camera traps n = 4923 trap‐days) in around protected area (Furnas do Bom Jesus State Park, São Paulo, Brazil) to survey for two potentially interactive species: puma Puma concolor free‐ranging dogs Canis familiaris ). used...
We studied the breeding success of resident Bald Eagles (Haliaeetus leucocephalus) over a 20-year period along Pit River drainage in northern California. In 258 nesting attempts at 10 intensively territories, 0.31 to 1.65 young were produced per year occupied territory (mean = 0.97), with average 62%. Nineteen individually banded adult from zero 36 during their lifetimes, and birds remained on territories for 1–16 years following capture as adults. calculated 90% annual survival rate adults...
Nest parasitism by Brown-headed Cowbirds (Molothrus ater) negatively affects nest production and success of the majority their hosts. However, it is unclear what effects cowbird fledglings have on host broods during postfledging period. We monitored 65 nests Ovenbirds (Seiurus aurocapilla) from 2012–2014 in central Missouri, 49% which were parasitized Cowbirds. used radio-telemetry to track daily movements, survival, parental care for 13 Ovenbird that fledged cowbirds 21 non-parasitized...