Filters: Tags: Fragmentation (X)
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Synopsis: This study evaluated the effects of landscape management on the spread of mountain pine beetle colonization in Banff National Park, Alberta, Canada. Researchers used annual aerial survey data and geo-referenced locations of colonized trees that were cut and removed to assess if the area colonized and the spatial extent of pine beetles differed between monitoring and management zones. Pine beetles were allowed to follow their natural course in the monitoring zone, while an extensive eradication program involving cutting and burning colonized trees was established in the management zone. Management resulted in no detectable effect on the scale of the zone. However, at the sub-zone scale, the area affected...
Categories: Publication;
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Alberta,
Banff National Park,
Dendroctonus ponderosae,
Land use configuration,
Landscape fragmentation,
Synopsis: This book addresses issues of landscape fragmentation and ecology emanating from the construction and use of roads. The text highlights ecosystem implications of this type of linear disturbance in relation to the following topics: · Roads, vehicles, and transportation planning · Vegetation and roadsides · Wildlife populations and collision mortality · Water, sediment, and chemical flows · Aquatic ecosystems · Wind, noise, and atmospheric effects · Road networks and landscape fragmentation Conclusions: Book addresses issues of landscape fragmentation and ecology emanating from the construction and use of roads. The text highlights ecosystem implications...
Categories: Publication;
Types: Citation;
Tags: Global,
Land use configuration,
Landscape fragmentation,
edge,
fragmentation,
This dataset represents areas in western Oregon with high conservation value. Identification of areas with high conservation value can help land managers strategize during planning efforts to better meet goals, such as viability of northern spotted owls. A large proportion of the areas identified as high conservation value fall on public lands, some areas of which are currently undergoing management plan revisions. Combination of this dataset with datasets depicting land ownership and protection status, such as the Protected Areas Database, can reveal areas of high conservation value which are not currently protected. High conservation value was evaluated using the Ecosystem Management Decision Support (EMDS) tool,...
Abstract (from http://www.sciencedirect.com/science/article/pii/S0006320712002388): U.S. National Park Service land managers face a variety of challenges to preserving the biodiversity in their parks. A principle challenge is to minimize the impacts of surrounding land use on park condition and biodiversity. In the absence of ideal sets of data and models, the present study develops methods and results that demonstrate a coarse-filter approach to understanding the effects of land use change on habitat types for four pilot study-areas. The area of analysis for each park is defined by a protected-area-centered-ecosystem. Habitat types were defined by biophysical factors assumed to represent the distribution of vegetation...
Categories: Publication;
Types: Citation;
Tags: Biophysical setting,
Decision-support,
Ecological monitoring,
Fragmentation,
Land use change,
Fragmentation extent of six ecosystem types after European Settlement was analyzed using LANDFIRE data. The ecosystem types includes: Grassland, Shrubland, Conifer, Riparian, Hardwood and Sparse ecosystems. The land use change and fragmentation extents have been analyzed by delineating nine Greater Wildland Ecosystems (GWEs) across NCCSC.
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: Fragmentation,
Grasslands and Plains,
Greater Wildland Ecosystem,
Housing Desnity,
LANDFIRE,
This dataset contains measures of natural vegetation fragmentation for the State of Utah calculated using FRAGSTATS, a program which produces a series of metrics that are focused on fragmentation at the individual patch, class, and landscape levels. The fragmentation surface (input to FRAGSTATS) was created from NLCD Impervious Surfaces, LANDFIRE EVT, NatureServe National Landcover, roads, utility lines, power plants, pipelines, geothermal wells, mines, wind turbines, and oil/gas wells.The following three fragmentation metrics generated by FRAGSTATS (contained in this dataset) were chosen as input variables to the terrestrial landscape intactness logic model:1) Number of patches2) Average mean nearest neighbor3)...
To map the distribution of bluehead sucker, flannelmouth sucker, and roundtail chub (three-species assemblage), we compiled occurrence information from Wyoming Game and Fish Department (streams, rivers, and lakes and reservoirs), Utah Natural Heritage Program (point locations), and Colorado Parks and Wildlife (6th-level watersheds). Due to the variety in the data types available, we summarized occurrence information by 6th-level watersheds, streams and lakes. The resulting distribution map was used to quantify baseline conditions for each species and the three-species assemblage overall. Point locations with rivers in Utah and occupied watersheds in Colorado, were assumed to represent occurrence along the full reach...
Types: Live Data;
Tags: Aquatic Development Index,
BLM,
Barriers,
Bluehead Sucker,
Bureau of Land Management,
Synopsis: This study attempts to build a forest fragmentation database for the conterminous United States by utilizing high-resolution NLCD data, roads, and a series of fragmentation indices that quantify forest landscape patterns. The paper outlines a methodology for assessing forest fragmentation and provides a comprehensive data set to be used as a base for further investigation at smaller scales. Conclusions: A forest fragmentation database for the conterminous United States was built to quantify forest landscape patterns nationwide. The paper outlines a methodology for assessing forest fragmentation and provides a comprehensive data set to be used as a base for further investigation at smaller scales. Thresholds/Learnings:...
Categories: Publication;
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Conterminous United States,
Land use configuration,
Landscape fragmentation,
Natural cover amount,
configuration,
Conclusions:Influx of woody vegetation associated with fragmentation correlates with decline in grassland bird speciesThresholds/Learnings:When native grassland cover dropped below 60% at one site, and 30-40% at another site, the arrangement or habitat patches became more important to the survival of populations than habitat amount alone
Categories: Publication;
Types: Citation;
Tags: Land use configuration,
Landscape fragmentation,
Natural cover heterogeneity,
Oklahoma,
biodiversity,
Conclusions: Marten capture rates were negatively correlated with increasing proximity of open areas and increasing extent of high-contrast edges. Forested landscapes were unsuitable for martens when the average nearest-neighbor distance between open, non-forested patches was <100m. Thresholds/Learnings: Synopsis: This study aimed to determine whether American marten abundance changed with incremental increases in habitat fragmentation caused by the combined effects of natural openings and timber clearcuts. Researchers evaluated differences in marten capture rates in 18 study sites with different levels of fragmentation. Martens appeared to respond negatively to low levels of habitat fragmentation, even with remaining...
Categories: Publication;
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: American martens,
Land use configuration,
Landscape fragmentation,
Natural cover amount,
Utah,
Synopsis: This study examined the reluctance of different birds species to cross habitat gaps in a fragmented forest landscape. Researchers induced birds in the post-fledging period to cross gaps of varying widths and to choose between routes through woodland or across open areas by attracting them with recorded chickadee mobbing calls. Overall, birds were twice as likely to travel through 50 m of woodland than they were to travel through 50 m of open gap areas to reach the recording. When given a choice of traveling through woodland or across a gap, the majority of birds preferred woodland routes, even when they were three times longer than shortcuts in the open. Birds did not just use movement corridors, but strongly...
Categories: Publication;
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Landscape fragmentation,
Quebec,
connectivity,
forest,
forest songbirds,
Control of invasive sea lamprey recruitment from tributary streams is a major management objective in the Great Lakes, and benefits from barriers that prevent access to spawning habitat. As society moves toward removal of more tributary barriers due to concerns about native migratory fishes, aging infrastructure, and vulnerability to climate-driven flooding, it is important to assess the costs of alternative options for sea lamprey control. This project is integrating cost estimates for application of a lamprey-specific pesticide into cost-benefit optimization models used to support decisions about barrier removals that maximize restoration of habitat for native species. By integrating lamprey control options...
Categories: Data,
Project;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: 2015,
Applications and Tools,
EARTH SCIENCE > LAND SURFACE > LANDSCAPE,
Federal resource managers,
Great Lakes,
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...
Wind energy generation causes transformation of landscapes as new roads, pads, and transmission lines are constructed. We mapped, quantified, and analyzed the effects of facilities' geographic context on road networks and changes in landscape patterns by digitizing the footprints of 39 wind facilities and the surrounding land cover using high-resolution imagery of before and after construction. These data were used in understanding how new facilities change the amount of undeveloped land and changes in metrics of landscape patterns.
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Connectivity,
Core Area,
Development,
Energy,
Fragmentation,
Fragmentation extent of six ecosystem types after European Settlement was analyzed using LANDFIRE data. The ecosystem types includes: Grassland, Shrubland, Conifer, Riparian, Hardwood and Sparse ecosystems. The land use change and fragmentation extents have been analyzed by delineating nine Greater Wildland Ecosystems (GWEs) across NCCSC.
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: Fragmentation,
Grasslands and Plains,
Greater Wildland Ecosystem,
LANDFIRE,
Land Use Land Cover,
Identified baseline sage grouse habitat using the greater sage grouse general habitat use model developed by Hanser and others (2011) based on sage grouse pellet surveys. Predictor variables in the model included percent cover of sagebrush shrublands (sagebrush steppe and mountain big sagebrush, which is part of the foothill shrublands and woodlands community) and riparian vegetation, annual minimum temperature, topographic roughness, and elevation. Data sources for vegetation include LANDFIRE v1.10 and PRISM. We masked out forest, open water, and elevations greater than 2,900 m. The map of potential habitat under baseline conditions was based on a probability of occurrence greater than 0.25; this probability threshold...
Why Rangelands: The Central Valley of California, the surrounding foothills and the interior Coast Range include over 18 million acres of grassland. Most of this land is privately owned and managed for livestock production. Because grasslands are found in some of California’s fastest-growing counties, they are severely threatened by land conversion and development. In addition climate change stresses grasslands by potentially changing water availability and species distributions.Maintaining a ranching landscape can greatly support biodiversity conservation in the California Landscape Conservation Cooperative (LCC) region. In addition ranches generate multiple ecosystem services—defined as human benefits provided...
Synopsis: Because recent bark beetle population eruptions have exceeded the frequencies, impacts, and ranges documented during the previous 125 years, researchers have been prompted to determine what factors trigger broad scale outbreaks, and how do these factors interact? How do human activities, such as forest management, alter these interactions, and thus the frequency, extent, severity, and synchrony of outbreaks? Extensive host tree abundance and susceptibility, concentrated beetle density, favorable weather, optimal symbiotic associations, and escape from natural enemies must occur jointly for beetles to surpass a series of thresholds and exert widespread disturbance. Eruptions occur when key thresholds are...
Categories: Publication;
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Alaska,
Alberta,
Arizona,
British Columbia,
California,
Synopsis: This study tested the null hypothesis that densities of mammalian populations are constant over patches of varied size. In other words, performance as estimated by density does not covary with patch area. Researchers used a composite database from published studies and found that densities of 20 out of 32 species did not vary with patch area. Five species showed increasing density-area relationships and seven species showed decreasing density-area relationships. Landscapes comprised of smaller, less isolated patched tended to have negative density-area relationships and landscapes with large, more isolated patched tended to have positive density-area relationships. These results indicate that there are...
Categories: Publication;
Types: Citation;
Tags: Density-area relationships,
Landscape fragmentation,
Natural cover amount,
configuration,
fragmentation,
Fragmentation extent of six ecosystem types after European Settlement was analyzed using LANDFIRE data. The ecosystem types includes: Grassland, Shrubland, Conifer, Riparian, Hardwood and Sparse ecosystems. The land use change and fragmentation extents have been analyzed by delineating nine Greater Wildland Ecosystems (GWEs) across NCCSC.
Categories: Data;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: Fragmentation,
Grasslands and Plains,
Greater Wildland Ecosystem,
Housing Density,
LANDFIRE,
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