Census (Survey) Database Used for Demographic Analysis of Agassiz’s Desert Tortoise (Gopherus agassizii) on a 7.77 square km plot inside and outside the fenced Desert Tortoise Research Natural Area, Western Mojave Desert, USA, over a 34-year Period

We developed a model for analyzing multi-year demographic data for long-lived animals and used data from a population of Agassiz’s desert tortoise (Gopherus agassizii) at the Desert Tortoise Research Natural Area in the western Mojave Desert of California, USA, as a case study. The study area was 7.77 square kilometers and included two locations: inside and outside the fenced boundary. The wildlife-permeable, protective fence was designed to prevent entry from vehicle users and sheep grazing. We collected mark-recapture data from 1,123 tortoises during 7 annual surveys consisting of two censuses each over a 34-year period. We used a Bayesian modeling framework to develop a multistate Jolly-Seber model because of...

Categories: Data; Tags: California, Desert Tortoise Research Natural Area, Mojave Desert, USGS-EMA-LOW-PL Mojave Desert/SW Desert, USGS-EMA-LOW-SB T&E: Listed reptiles, All tags... biota, habitat fragmentation, human impacts, mathematical modeling, population dynamics, Fewer tags

2012 National Anthropogenic Barrier Dataset (NABD)

The main objective of this project was to develop a dataset of large, anthropogenic barriers that are spatially linked to the National Hydrography Dataset Plus Version 1 (NHDPlusV1) for the conterminous U.S. and the high resolution National Hydrography Dataset (NHD) for Alaska (1:63,000 scale) and Hawaii (1:24,000 scale) to facilitate GIS analyses based on the NHDPlusV1/NHD and NID datasets. To meet this objective, Michigan State University conducted a spatial linkage of the point dataset of the 2009 National Inventory of Dams (NID) created by the U.S. Army Corps of Engineers (USACE) to the NHDPlusV1/NHD. The pool of dam data included were modified based on 1) dam removals that occurred after development of the...

Tags: Alabama, Alaska, Arizona, Arkansas, California, All tags... Colorado, Connecticut, Connectivity, Dams, Delaware, Florida, Georgia, Habitat fragmentation, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Linked to the National Hydrography Dataset Plus (1:100,000), Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, National Assessment Data, National Hydrography Dataset Plus, National Inventory of Dams, National hydrography datasets, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, Rivers, South Carolina, South Dakota, Spatial Data, Spatial dam datasets, Stream Connectivity, Streams, Tennessee, Texas, USA, Utah, Virginia, Washington, West Virginia, Wisconsin, Wyoming, Fewer tags

Changes in wildfire occurrence and risk to homes from 1990 through 2019 in the Southern Rocky Mountains, USA (data release)

Wildfires and housing development have increased since the 1990s, presenting unique challenges for fire management. However, it is unclear how the relative influences of housing growth and changing wildfire occurrence have contributed to risk to homes. We fit a random forest using weather, land cover, topography, and past fire history to predict burn probabilities and uncertainty intervals. Then, we estimated risk at 1-km resolution and monthly intervals from 1990 through 2019 by combining predicted burn probabilities with housing density across the Southern Rocky Mountains. We used 3 scenarios to evaluate how housing growth and changes in burn probability influenced risk individually and combined (observed, 1990...

Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Climatology, Colorado, Ecology, Geography, Land Use Change, All tags... New Mexico, Southern Rocky Mountains, USGS Science Data Catalog (SDC), United States, Utah, Wyoming, habitat alteration and disturbance, habitat fragmentation, human impacts, land use and land cover, wildland fire, Fewer tags

Sagebrush structural connectivity yearly and temporal trends based on RCMAP sagebrush products, biome-wide from 1985 to 2020

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

Great Lakes Restoration Initiative's Terrestrial Habitats & Connectivity Work Group's Pilot Area's Pre-Fiscal Year 2021 Forest Habitat Connectivity

This dataset is the first installment of a yearly connectivity update for forested habitat within the Great Lakes Restoration Initiative's (GLRI) Terrestrial Habitats & Connectivity (TH&C) work group's Pilot Area. The Pilot Area is a region of the northern Great Lakes Basin between Ashland, WI and the Keweenaw Peninsula and is bounded by Lake Superior in the north and the basin boundary in the south, including a 70 km buffer. Each year the TH&C selects project proposals for funding within the pilot area. These proposals involve either restoration, research, or land acquisition aimed at improving or increasing connectivity in this area. The intended purpose of each year’s update is to understand the effects of funded...

Tags: Connectivity, Ecology, Forest Habitat, Great Lakes, USGS Science Data Catalog (SDC), All tags... biota, dispersal (organisms), environment, habitat fragmentation, imageryBaseMapsEarthCover, structure, Fewer tags

Great Lakes Restoration Initiative's Terrestrial Habitats & Connectivity Work Group's Pilot Area's Post-Fiscal Year 2022 Forest Habitat Connectivity

This dataset is the third installment of a yearly connectivity update for forested habitat within the Great Lakes Restoration Initiative's (GLRI) Terrestrial Habitats & Connectivity (TH&C) work group's Pilot Area. The Pilot Area is a region of the northern Great Lakes Basin between Ashland, WI and the Keweenaw Peninsula and is bounded by Lake Superior in the north and the basin boundary in the south, including a 70 km buffer. Each year the TH&C selects project proposals for funding within the pilot area. These proposals involve either restoration, research, or land acquisition aimed at improving or increasing forest connectivity in this area. The intended purpose of each year’s update is to understand the effects...

Tags: Connectivity, Ecology, Forest Habitat, Great Lakes, Land Use Change, All tags... USGS Science Data Catalog (SDC), Wildlife Biology, biota, dispersal (organisms), environment, habitat fragmentation, imageryBaseMapsEarthCover, structure, Fewer tags

Grasslands - Habitat Fragmentation and Loss Stressor - Unsustainable Grazing

These heatmaps show a top 3 stressor or service, as ranked by participants, and the concentration of participants who reported as working in each municipality or county who also voted for that stressor or service across the landscape.

Categories: Data; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: grasslands, habitat fragmentation, habitat loss, unsustainable grazing