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Habitat fragmentation and degradation are considered to be a leading causes of long-term population declines of Northern Bobwhites and many other species of grassland birds, such as Eastern Meadowlark. Research is needed to understand the factors causing habitat loss and fragmentation and to identify the areas that are high-probability candidates for successful restoration so that optimal decisions can be made. For example, uncertainty exists regarding the impacts of energy development activities or climate change that affect significant portions of wildlife populations in the GCP LCC. Furthermore, changing land ownership coupled with woody shrub and exotic grass encroachment have reduced the amount and quality...
Categories: Data,
Project;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: 2015,
2016,
Academics & scientific researchers,
Conservation Design,
Conservation NGOs, All tags...
EARTH SCIENCE > HUMAN DIMENSIONS > HABITAT CONVERSION/FRAGMENTATION,
Eastern Meadowlark,
Federal resource managers,
Gulf Coast Prairie Landscape Conservation Cooperative,
Informing Conservation Delivery,
KS-04,
LA-01,
LA-02,
LA-03,
LA-04,
LA-05,
LCC,
LCC Network Science Catalog,
Louisiana,
MS-04,
Map,
Northern Bobwhite,
OK-01,
OK-02,
OK-03,
OK-04,
OK-05,
Oklahoma,
Project,
Publication,
Report,
State agencies,
TX-02,
TX-03,
TX-04,
TX-05,
TX-06,
TX-07,
TX-08,
TX-09,
TX-10,
TX-11,
TX-12,
TX-13,
TX-14,
TX-15,
TX-17,
TX-18,
TX-19,
TX-20,
TX-21,
TX-22,
TX-23,
TX-24,
TX-25,
TX-26,
TX-27,
TX-28,
TX-29,
TX-30,
TX-31,
TX-32,
Texas,
Texas,
biota,
completed,
fragmentation, Fewer tags
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The study of population dynamics requires unbiased, precise estimates of abundance and vital rates that account for the demographic structure inherent in all wildlife and plant populations. Traditionally, these estimates have only been available through approaches that rely on intensive mark-recapture data. We extended recently developed N-mixture models to demonstrate how demographic parameters and abundance can be estimated for structured populations using only stage-structured count data. Our modeling framework can be used to make reliable inferences on abundance as well as recruitment, immigration, stage-specific survival, and detection rates during sampling. We present a range of simulations to illustrate the...
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Loss and fragmentation of grassland habitat can influence populations of the animal communities dependent upon this ecosystem. Grassland birds have faced notable declines in some areas of their range, potentially a result of changes to suitable habitat. Managing populations of grassland birds requires an understanding of the effects of habitat loss and fragmentation at a local and regional scale. We studied two grassland-dependent bird species, Eastern Meadowlarks (Sturnella magna) and Northern Bobwhites (Colinus virginianus), in an area of recent explosive growth in oil and gas related development. First, we quantified habitat lossand fragmentation of grassland habitat using remotely sensed datasets at multiple...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Academics & scientific researchers,
Conservation NGOs,
Conservation design,
Consevation design,
EARTH SCIENCE > HUMAN DIMENSIONS > HABITAT CONVERSION/FRAGMENTATION, All tags...
Eastern Meadowlark,
Federal resource managers,
Informing Conservation Delivery,
LCC Network Science Catalog,
Northern Bobwhite,
Report,
Report,
State agencies,
Texas,
biota,
completed,
fragmentation, Fewer tags
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Wildlife populations consist of individuals that contribute disproportionately to growth and viability. Understanding a population's spatial and temporal dynamics requires estimates of abundance and demographic rates that account for this heterogeneity. Estimating these quantities can be difficult, requiring years of intensive data collection. Often, this is accomplished through the capture and recapture of individual animals, which is generally only feasible at a limited number of locations. In contrast, N-mixture models allow for the estimation of abundance, and spatial variation in abundance, from count data alone. We extend recently developed multistate, open population N-mixture models, which can additionally...
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