Search Results - "Steen, Valerie"

An evaluation of stringent filtering to improve species distribution models from citizen science data by Steen, Valerie A., Elphick, Chris S., Tingley, Morgan W.

“…Aim Citizen science data are increasingly used for modelling species distributions because they offer broad spatiotemporal coverage of local observations…”
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Spatial thinning and class balancing: Key choices lead to variation in the performance of species distribution models with citizen science data by Steen, Valerie A., Tingley, Morgan W., Paton, Peter W. C., Elphick, Chris S., McPherson, Jana

“…Spatial biases are a common feature of presence–absence data from citizen scientists. Spatial thinning can mitigate errors in species distribution models…”
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Implications of Climate Change for Wetland-Dependent Birds in the Prairie Pothole Region by Steen, Valerie A., Skagen, Susan K., Melcher, Cynthia P.

“…The habitats and food resources required to support breeding and migrant birds dependent on North American prairie wetlands are threatened by impending climate…”
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Vulnerability of breeding waterbirds to climate change in the Prairie Pothole Region, U.S.A by Steen, Valerie, Skagen, Susan K, Noon, Barry R

“…The Prairie Pothole Region (PPR) of the north-central U.S. and south-central Canada contains millions of small prairie wetlands that provide critical habitat…”
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Clustering and ensembling approaches to support surrogate-based species management by Sofaer, Helen R., Flather, Curtis H., Skagen, Susan K., Steen, Valerie A., Noon, Barry R.

“…Aim Surrogate species can provide an efficient mechanism for biodiversity conservation if they encompass the needs or indicate the status of a broader set of…”
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Monitoring long-term riparian vegetation trends to inform local habitat management in a mountainous environment by Assal, Timothy J., Steen, Valerie A., Caltrider, Todd, Cundy, Travis, Stewart, Cheyenne, Manning, Nicholas, Anderson, Patrick J.

“…[Display omitted] •We quantified the rate of change in the condition of deciduous vegetation.•Multiple temporal windows illuminate patterns in long-term…”
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Wetland Selection by Breeding and Foraging Black Terns in the Prairie Pothole Region of the United States by Steen, Valerie A, Powell, Abby N

“…We examined wetland selection by the Black Tern (Chlidonias niger), a species that breeds primarily in the prairie pothole region, has experienced population…”
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An evaluation of multistate occupancy models for estimating relative abundance and population trends by Steen, Valerie A., Duarte, Adam, Peterson, James T.

“…•Multistate occupancy ‘abundance’ models can differentiate sites with relatively high and low abundance.•For detecting population trends, the same sites should…”
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Projecting species’ vulnerability to climate change: Which uncertainty sources matter most and extrapolate best? by Steen, Valerie, Sofaer, Helen R., Skagen, Susan K., Ray, Andrea J., Noon, Barry R.

“…Species distribution models (SDMs) are commonly used to assess potential climate change impacts on biodiversity, but several critical methodological decisions…”
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Preparing for an uncertain future: migrating shorebird response to past climatic fluctuations in the Prairie Potholes by Steen, Valerie, Skagen, Susan K., Noon, Barry R.

“…The Prairie Pothole Region, situated in the northern Great Plains, provides important stopover habitat for migratory shorebirds. During spring migration in the…”
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Impacts of climate change to breeding and migrating waterbirds in the prairie pothole region by Steen, Valerie

“…The Prairie Pothole Region (PPR) of the north-central U.S. and south-central Canada contains millions of small prairie wetlands that provide critical habitat…”
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Potential Effects of Climate Change on the Distribution of Waterbirds in the Prairie Pothole Region, U.S.A by Steen, Valerie, Powell, Abby N

“…Wetland-dependent birds are considered to be at particularly high risk for negative climate change effects. Current and future distributions of American…”
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