Trent L. McDonald
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View article: spbal: An R package for spatially balanced master sampling
spbal: An R package for spatially balanced master sampling Open
Summary One of the most critical design features for sampling spatial populations is being able to draw spatially balanced samples. A substantial body of literature on sampling methodology has shown that spatially balanced samples can impr…
View article: Marbled murrelet habitat suitability in redwood timberlands of Northern Coastal California utilizing LiDAR-derived individual tree metrics
Marbled murrelet habitat suitability in redwood timberlands of Northern Coastal California utilizing LiDAR-derived individual tree metrics Open
The marbled murrelet ( Brachyramphus marmoratus ) is a threatened seabird found from Southern California to Alaska that forages at sea but nests in near coastal forests. Marbled murrelet nesting habitat is generally comprised of old-growth…
View article: Marbled Murrelet Habitat Suitability in Redwood Timberlands of Northern Coastal California Utilizing LiDAR-Derived Individual Tree Metrics
Marbled Murrelet Habitat Suitability in Redwood Timberlands of Northern Coastal California Utilizing LiDAR-Derived Individual Tree Metrics Open
The marbled murrelet ( Brachyramphus marmoratus ) is a threatened seabird found from Southern California to Alaska that forages at sea but nests in near coastal forests. Marbled murrelet nesting habitat is generally comprised of old-growth…
View article: Relating polar bears killed, human presence, and ice conditions in Svalbard 1987–2019
Relating polar bears killed, human presence, and ice conditions in Svalbard 1987–2019 Open
Conflicts between humans and polar bears have been predicted to increase as polar bear prime habitat, sea ice, is decreasing. In Svalbard, a strict protection and control schemes have secured near complete records of bears killed and found…
View article: Relating Polar Bears Killed, Human Presence, and Ice Conditions in Svalbard 1987 – 2019
Relating Polar Bears Killed, Human Presence, and Ice Conditions in Svalbard 1987 – 2019 Open
Conflicts between humans and polar bears have been predicted to increase as polar bear prime habitat, sea ice, is decreasing. In Svalbard, a strong protection and strict control schemes have secured near complete records of bears killed an…
View article: Detecting changes in the distribution of calling bowhead whales exposed to fluctuating anthropogenic sounds
Detecting changes in the distribution of calling bowhead whales exposed to fluctuating anthropogenic sounds Open
This paper describes an analysis approach designed to detect the effects of fluctuating anthropogenic underwater sound on the distribution of calling bowhead whales (Balaena mysticetus) during migration. The anthropogenic sounds in this ca…
View article: Estimating northern spotted owl (Strix occidentalis caurina) pair detection probabilities based on call-back surveys associated with long-term mark-recapture studies, 1993–2018
Estimating northern spotted owl (Strix occidentalis caurina) pair detection probabilities based on call-back surveys associated with long-term mark-recapture studies, 1993–2018 Open
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 …
View article: Conservation of rare and cryptic species: Challenges of uncertainty and opportunities for progress
Conservation of rare and cryptic species: Challenges of uncertainty and opportunities for progress Open
Effective conservation of at‐risk species presents a conundrum, often requiring rapid status assessments and timely actions regardless of the adequacy of best available information. Here, we present a case study on Humboldt martens ( Marte…
View article: Range‐wide sources of variation in reproductive rates of northern spotted owls
Range‐wide sources of variation in reproductive rates of northern spotted owls Open
We conducted a range‐wide investigation of the dynamics of site‐level reproductive rate of northern spotted owls using survey data from 11 study areas across the subspecies geographic range collected during 1993–2018. Our analytical approa…
View article: Invader removal triggers competitive release in a threatened avian predator
Invader removal triggers competitive release in a threatened avian predator Open
Significance Invasive species can cause extinctions of native species and widespread biodiversity loss. Invader removal is a common management response, but the use of long-term field experiments to characterize effectiveness of removals i…
View article: Range-wide declines of northern spotted owl populations in the Pacific Northwest: A meta-analysis
Range-wide declines of northern spotted owl populations in the Pacific Northwest: A meta-analysis Open
The northern spotted owl (Strix occidentalis caurina) inhabits older coniferous forests in the Pacific Northwest and has been at the center of forest management issues in this region. The immediate threats to this federally listed species …
View article: Nonparametric, Computer Intensive Statistics: A Primer
Nonparametric, Computer Intensive Statistics: A Primer Open
NOTE: The first page of text has been automatically extracted and included below in lieu of an abstract Non-Parametric, Computer-Intensive Statistics: A Primer Abstract The authors have developed a first course in statistics for engineers …
View article: Nonparametric, Computer Intensive Statistics Course Modules For Engineers
Nonparametric, Computer Intensive Statistics Course Modules For Engineers Open
NOTE: The first page of text has been automatically extracted and included below in lieu of an abstract Non-Parametric, Computer-Intensive Statistics Course Modules for Engineers Abstract This NSF CCLI project develops materials for a new …
View article: All routes are not created equal: An ungulate's choice of migration route can influence its survival
All routes are not created equal: An ungulate's choice of migration route can influence its survival Open
Our knowledge of migration ecology has progressed quickly in concert with technological advances that collect fine‐scale movement data through time. We now know that migration plays a critical role in the annual nutritional cycle of large …
View article: Spatially Balanced Sampling using the Halton Sequence
Spatially Balanced Sampling using the Halton Sequence Open
A spatial sampling design determines where sample locations are placed in a study area. The main
\nobjective is to select sample locations in such a way that valid scientific inferences can be made to
\nall regions of the study area. A sam…
View article: The Use of Ranked Set Sampling with Balanced Acceptance Sampling
The Use of Ranked Set Sampling with Balanced Acceptance Sampling Open
Ranked set sampling is a design that can increase sample efficiency by forcing sample coverage over the range of response values in the population. Balanced acceptance sampling (BAS) has a similar aim, with sample efficiency coming from ensuri…
View article: Spatially Balanced Sampling
Spatially Balanced Sampling Open
Spatially balanced sampling is an emerging area in statistical sampling. These designs are popular because they are one way to ensure the selected sample has spatial coverage over the entire survey area. This feature of spatial coverage ai…
View article: Using salinity to identify common bottlenose dolphin habitat in Barataria Bay, Louisiana, USA
Using salinity to identify common bottlenose dolphin habitat in Barataria Bay, Louisiana, USA Open
Following the Deepwater Horizon (DWH) oil spill, numerous studies were conducted to determine impacts on common bottlenose dolphins Tursiops truncatus. Common bottlenose dolphins are found in estuarine environments of the northern Gulf of …
View article: Survival, density, and abundance of common bottlenose dolphins in Barataria Bay (USA) following the Deepwater Horizon oil spill
Survival, density, and abundance of common bottlenose dolphins in Barataria Bay (USA) following the Deepwater Horizon oil spill Open
To assess potential impacts of the Deepwater Horizon oil spill in April 2010, we conducted boat-based photo-identification surveys for common bottlenose dolphins Tursiops truncatus in Barataria Bay, Louisiana, USA (~230 km2, located 167 km…
View article: Density and exposure of surface-pelagic juvenile sea turtles to Deepwater Horizon oil
Density and exposure of surface-pelagic juvenile sea turtles to Deepwater Horizon oil Open
The 2010 Deepwater Horizon (DWH) oil spill posed a severe threat to surface-pelagic sea turtles because the surface convergence zones, which provide vital habitat by aggregating pelagic Sargassum and other floating material, also aggregate…
View article: Estimating sea turtle exposures to Deepwater Horizon oil
Estimating sea turtle exposures to Deepwater Horizon oil Open
The Deepwater Horizon (DWH) oil spill was unprecedented in extent and duration, and affected marine natural resources, including sea turtles, throughout the northern Gulf of Mexico. Consequently, US federal and state Trustees documented an…
View article: Appendix A. Definitions of covariates and covariate combinations (groups) used to model survival and recapture probabilities of southern Beaufort Sea polar bears.
Appendix A. Definitions of covariates and covariate combinations (groups) used to model survival and recapture probabilities of southern Beaufort Sea polar bears. Open
Definitions of covariates and covariate combinations (groups) used to model survival and recapture probabilities of southern Beaufort Sea polar bears.
View article: Supplement 1. Example data and R code.
Supplement 1. Example data and R code. Open
File List available_habitat.txt - data file representing the available habitat gps_locations.txt - data file representing the GPS location data Rcode.R - R code to analyze the example data using the RSF likelihood for GPS fix success all_f…
View article: Appendix E. Projected trends in the abundance of southern Beaufort Sea polar bears based on estimated survival rates.
Appendix E. Projected trends in the abundance of southern Beaufort Sea polar bears based on estimated survival rates. Open
Projected trends in the abundance of southern Beaufort Sea polar bears based on estimated survival rates.
View article: Appendix C. Model-averaged estimates of recapture probabilities for southern Beaufort Sea polar bears and total model weights associated with recapture probability covariate structures.
Appendix C. Model-averaged estimates of recapture probabilities for southern Beaufort Sea polar bears and total model weights associated with recapture probability covariate structures. Open
Model-averaged estimates of recapture probabilities for southern Beaufort Sea polar bears and total model weights associated with recapture probability covariate structures.
View article: Appendix D. An analysis of movement data from southern Beaufort Sea polar bears instrumented with radio-collars.
Appendix D. An analysis of movement data from southern Beaufort Sea polar bears instrumented with radio-collars. Open
An analysis of movement data from southern Beaufort Sea polar bears instrumented with radio-collars.