• Publications
  • Influence
WOLVES INFLUENCE ELK MOVEMENTS: BEHAVIOR SHAPES A TROPHIC CASCADE IN YELLOWSTONE NATIONAL PARK
A trophic cascade recently has been reported among wolves, elk, and aspen on the northern winter range of Yellowstone National Park, Wyoming, USA, but the mechanisms of indirect interactions within
Resource Selection Functions Based on Use–Availability Data: Theoretical Motivation and Evaluation Methods
TLDR
A new validation method is concluded for evaluating predictive performance of a RSF and for assessing if the model deviates from being proportional to the probability of use of a resource unit.
Linking occurrence and fitness to persistence: habitat-based approach for endangered greater sage-grouse.
  • C. Aldridge, M. Boyce
  • Environmental Science
    Ecological applications : a publication of the…
  • 1 March 2007
TLDR
The authors' habitat models identify areas of protection priority and areas that require immediate management attention to enhance recruitment to secure the viability of this population of Sage-Grouse.
Estimating Uncertainty in Population Growth Rates: Jackknife vs. Bootstrap Techniques
TLDR
Two computer- intensive techniques, Jackknifing and Bootstrapping, are used to estimate bias, standard errors, and sampling distributions of r for real and hypothetical populations of cladocerans, suggesting that the precision for reporting r values should in most cases be limited to two significant figures.
Population Viability Analysis
TLDR
PVAs vary according to the ecology of the species, the expertise of the modelers, and the extent of available data; some invoke analytical methods or "rules of thumb," always burdened with severe assumptions.
Global declines of caribou and reindeer
Caribou and reindeer herds are declining across their circumpolar range, coincident with increasing arctic temperatures and precipitation, and anthropogenic landscape change. Here, we examine the
Cross-validation strategies for data with temporal, spatial, hierarchical, or phylogenetic structure
TLDR
It is recommended that block cross-validation be used wherever dependence structures exist in a dataset, even if no correlation structure is visible in the fitted model residuals, or if the fitted models account for such correlations.
Removing GPS collar bias in habitat selection studies
Summary 1. Compared to traditional radio-collars, global positioning system (GPS) collars provide finer spatial resolution and collect locations across a broader range of spatial and temporal
Modelling distribution and abundance with presence‐only data
TLDR
A synthesis and critique of statistical methods currently in use to both estimate and evaluate these models are provided, and the critical importance of study design in models where only presence can be identified is discussed.
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