Erin K Buchholtz

Circuit-based potential fire connectivity and relative flow patterns in the Great Basin, United States, 270 meters

The rasters in this dataset represent modeled outputs of potential fire connectivity and relative flow patterns in the Great Basin. We define ‘fire connectivity’ as the landscape’s capacity to facilitate fire transmission from one point on the landscape to another. We applied an omnidirectional circuit theory algorithm (Omniscape) to model fire connectivity in the Great Basin of the western United States. We used predicted rates of fire spread to approximate conductance and calculated current densities to identify connections among areas with high spread rates. We calculated the cumulative current density as well as normalized cumulative current density, with the outputs included here as raster data.

Tags: California, Ecology, Great Basin, Idaho, Nevada, All tags... Oregon, USGS Science Data Catalog (SDC), Utah, circuit theory, connectivity, environment, fire control, sagebrush, shrubland ecosystems, Fewer tags

Time series of circuit-based relative flow patterns for sagebrush structural connectivity from 1985 to 2020

This raster dataset quantifies the relative flow patterns of structural sagebrush connectivity in the sagebrush biome at 270-meter resolution. Connectivity was calculated using an omnidirectional circuit-based algorithm, with sources, targets, and conductance based on sagebrush fractional component from the RCMAP sagebrush products for 1985, 1990, 1995, 2000, 2005, 2010, 2015, and 2020. Normalized cumulative current density was used to represent relative flow of connectivity and binned into 3 relative flow classes (impeded, diffuse, and channelized flow). We calculated the relative flow temporal trends for channelization and impedance between 1985 and 2020 to identify areas that were becoming more channelized or...

Tags: Arizona, California, Colorado, Idaho, Montana, All tags... Nevada, New Mexico, North Dakota, Oregon, South Dakota, United States, Utah, Washington, Wyoming, biota, connectivity, environment, geoscientificInformation, habitat fragmentation, sagebrush, sagebrush biome, sagebrush biome, shrubland, shrubland ecosystems, shrublands, spatial analysis, structural connectivity, terrestrial ecosystems, time series analysis, time series datasets, Fewer tags

Landscape and connectivity metrics based on invasive annual grass cover from 2016-2018 summarized at 15 kilometer grid cells in the Great Basin, USA

The spatial context of invasions is increasingly recognized as important for the success and efficiency of management actions. This information can be key for managing invasive grasses that threaten native ecosystems. We calculated landscape metrics and circuit-based centrality for invasive grasses using a source input raster of weighted-average annual herbaceous cover from 2016-2018 (Maestas et al. 2020, 30 meter resolution) in the Great Basin, USA. This shapefile data product includes the summarized landscape metrics and connectivity metrics for 15 kilometer grid cells (n = 2408) across the Great Basin, USA. Metrics for each grid cell include: mean patch area (area_mn), class area (ca), number of patches (np),...

Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, Ecology, Great Basin, Idaho, Montana, All tags... Nevada, Oregon, USGS Science Data Catalog (SDC), United States, Utah, Wyoming, cheatgrass, environment, invasive annual grasses, invasive species, land surface characteristics, landscape metrics, structural connectivity, Fewer tags

Time series of circuit-based sagebrush structural connectivity from 1985 to 2020

This raster dataset quantifies the structural sagebrush connectivity in the sagebrush biome at 270-meter resolution. Connectivity was calculated using an omnidirectional circuit-based algorithm, with sources, targets, and conductance based on sagebrush fractional component from the RCMAP sagebrush products for 1985, 1990, 1995, 2000, 2005, 2010, 2015, and 2020. Cumulative current density was used to represent connectivity and binned into 20 quantile-based classes.

Tags: Arizona, California, Colorado, Idaho, Montana, All tags... Nevada, New Mexico, North Dakota, Oregon, South Dakota, United States, Utah, Washington, Wyoming, biota, connectivity, environment, geoscientificInformation, habitat fragmentation, sagebrush, sagebrush biome, sagebrush biome, shrubland, shrubland ecosystems, shrublands, spatial analysis, structural connectivity, terrestrial ecosystems, time series analysis, time series datasets, Fewer tags

This dataset includes modeled outputs for structural connectivity and trends in connectivity patterns in the sagebrush biome of the United States at 270-meter resolution. Connectivity was calculated using an omnidirectional circuit-based algorithm, with sources, targets, and conductance based on sagebrush fractional component from the RCMAP sagebrush products for 1985, 1990, 1995, 2000, 2005, 2010, 2015, and 2020. Cumulative current density was used to represent connectivity and normalized cumulative current density represented relative flow patterns. We also calculated rasters to represent linear trend in connectivity class, relative flow, and the consistency of connectivity classes.

Tags: Arizona, California, Colorado, Ecology, Idaho, All tags... Montana, Nevada, New Mexico, North Dakota, Oregon, Remote Sensing, South Dakota, USGS Science Data Catalog (SDC), United States, Utah, Washington, Wyoming, biota, connectivity, environment, geoscientificInformation, habitat fragmentation, sagebrush, sagebrush biome, sagebrush biome, shrubland, shrubland ecosystems, shrublands, spatial analysis, structural connectivity, terrestrial ecosystems, time series analysis, time series datasets, Fewer tags