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Responses to Climate across Trophic Levels Joe Sexton University of Maryland

Responses to Climate across Trophic Levels Joe Sexton University of Maryland David Mattson U.S. Geological Survey. Questions What are the spatial, demographic, and energetic responses of terrestrial vertebrates to climate? How do climate effects transmit through the trophic chain?

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Responses to Climate across Trophic Levels Joe Sexton University of Maryland

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  1. Responses to Climate across Trophic Levels Joe Sexton University of Maryland David Mattson U.S. Geological Survey • Questions • What are the spatial, demographic, and energetic responses of terrestrial vertebrates to climate? • How do climate effects transmit through the trophic chain? • Approach • Model movement, survival, energetics, and connectivity of large mammals on the Colorado Plateau using GPS telemetry, satellite measurements of vegetation, and climate datasets. • Key elements • Large database of herbivore and carnivore locations spanning 10 years of vegetation phenology measurements from MODIS. • Quantify and propagate uncertainty between trophic levels with hierarchical Bayesian models. • Assess habitat connectivity through graph-theoretic analyses. • Near-term efforts • Wavelet analysis of animal movements; comparison of terrain roughness indices; environmental gradient analysis of cougar diet and related prey responses CLIMATE VEGETATION HERBIVORES CARNIVORES

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