Active Transportation, Spring/Summer 2012, Issue 26,
2019
University of Louisville
Active Transportation, Spring/Summer 2012, Issue 26
Sustain Magazine
No abstract provided.
Heat Islands, Fall/Winter 2014, Issue 29,
2019
University of Louisville
Sustainable Behavior, Spring/Summer 2013, Issue 28,
2019
University of Louisville
Sustainable Behavior, Spring/Summer 2013, Issue 28
Sustain Magazine
No abstract provided.
Local Foods, Fall/Winter 2013, Issue 27,
2019
University of Louisville
Campus Sustainability, Spring/Summer 2014, Issue 30,
2019
University of Louisville
Campus Sustainability, Spring/Summer 2014, Issue 30
Sustain Magazine
No abstract provided.
Zero Waste, Spring/Summer 2017, Issue 36,
2019
University of Louisville
Consent Decrees, Fall/Winter 2017, Issue 35,
2019
University of Louisville
Human Ecology, Spring/Summer 2016, Issue 34,
2019
University of Louisville
Citizen Science, Fall/Winter 2016, Issue 33,
2019
University of Louisville
Urban Streams, Spring/Summer 2015, Issue 32,
2019
University of Louisville
Unconventional Energy, Fall/Winter 2015, Issue 31,
2019
University of Louisville
Unconventional Energy, Fall/Winter 2015, Issue 31
Sustain Magazine
No abstract provided.
Carbon Neutral, Spring/Summer 2018, Issue 38,
2019
University of Louisville
Political Will, Fall/Winter 2018, Issue 37,
2019
University of Louisville
Nonlinear Reaction–Diffusion Process Models Improve Inference For Population Dynamics,
2019
Colorado State University, Fort Collins
Nonlinear Reaction–Diffusion Process Models Improve Inference For Population Dynamics, Xinyi Lu, Perry J. Williams, Mevin B. Hooten, James A. Powell, Jamie N. Womble, Michael R. Bower
United States National Park Service: Publications
Partial differential equations (PDEs) are a useful tool for modeling spatiotemporal dynamics of ecological processes. However, as an ecological process evolves, we need statistical models that can adapt to changing dynamics as new data are collected. We developed a model that combines an ecological diffusion equation and logistic growth to characterize colonization processes of a population that establishes long-term equilibrium over a heterogeneous environment. We also developed a homogenization strategy to statistically upscale the PDE for faster computation and adopted a hierarchical framework to accommodate multiple data sources collected at different spatial scales. We highlighted the advantages of using a …
Permafrost Hydrology Drives The Assimilation Of Old Carbon By Stream Food Webs In The Arctic,
2019
National Park Service, Arctic Network
Permafrost Hydrology Drives The Assimilation Of Old Carbon By Stream Food Webs In The Arctic, Jonathan A. O’Donnell, Michael P. Carey, Joshua C. Koch, Xiaomei Xu, Brett A. Poulin, Jennifer Walker, Christian E. Zimmerman
United States National Park Service: Publications
Permafrost thaw in the Arctic is mobilizing old carbon (C) from soils to aquatic ecosystems and the atmosphere. Little is known, however, about the assimilation of old C by aquatic food webs in Arctic watersheds. Here, we used C isotopes (d13C, D14C) to quantify C assimilation by biota across 12 streams in arctic Alaska. Streams spanned watersheds with varying permafrost hydrology, from ice-poor bedrock to ice-rich loess (that is, yedoma). We measured isotopic content of (1) C sources including dissolved organic C (DOC), dissolved inorganic C (DIC), and soil C, and (2) stream biota, including benthic biofilm and macroinvertebrates, and …
Our Envirome, Spring/Summer 2019, Issue 40,
2019
University of Louisville
Plastic Pollution, Fall/Winter 2019, Issue 39.3,
2019
University of Louisville
Plastic Pollution, Fall/Winter 2019, Issue 39.3
Sustain Magazine
No abstract provided.
Plastic Pollution, Fall/Winter 2019, Issue 39.2,
2019
University of Louisville
Plastic Pollution, Fall/Winter 2019, Issue 39.2
Sustain Magazine
No abstract provided.
Plastic Pollution, Fall/Winter 2019, Issue 39,
2019
University of Louisville
Social Interactions Do Not Drive Territory Aggregation In A Grassland Songbird,
2019
Kansas State University & University of Illinois at Urbana-Champaign
Social Interactions Do Not Drive Territory Aggregation In A Grassland Songbird, S.K. Winnicki, S.M. Munguia, E.J. Williams, W.A. Boyle
United States National Park Service: Publications
Understanding the drivers of animal distributions is a fundamental goal of ecology and informs habitat management. The costs and benefits of colonial aggregations in animals are well established, but the factors leading to aggregation in territorial animals remain unclear. Territorial animals might aggregate to facilitate social behavior such as (1) group defense from predators and/or parasites, (2) cooperative care of offspring, (3) extra-pair mating, and/or (4) mitigating costs of extra-pair mating through kin selection. Using experimental and observational methods, we tested predictions of all four hypotheses in a tallgrass prairie in northeast Kansas, United States. Grasshopper Sparrow (Ammodramus savannarum) males …
