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These data are the final landscape permeability data as described in the report "Conserving Nature's Stage: Identifying Resilient Terrestrial Landscapes in the Pacfic Northwest."Permeability refers to the connectivity of a focal cell to its ecological neighborhood when it is viewed as a source; in other words, it asks the question: “to what extent are ecological flows outward from that cell impeded or facilitated by the surrounding landscape?” Thus,permeability starts with a focal cell and looks at the resistance to ecological flow outward in all directions through the local neighborhood. As resistance increases, flow is impeded or stopped altogether. Areas of no resistance allow the flow to proceed until a user-specified...
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FY2015The Northwestern Great Basin ecoregion is one of the most intact ecosystems in the west. It is also a biological hotspot for migratory birds, greater sage-grouse and a stronghold for pronghorn antelope. However, altered fire regimes, invasive species, water scarcity, development, and climate change threaten the integrity of this landscape. Several efforts are ongoing for individual species, specific threats or sub-geographies, and over 60 existing plans and assessments have been identified for the region. This project will pull the pieces together to create a holistic view of shared priorities on the landscape.
Categories: Data, Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alford Desert, Alford Desert, Alford Desert, Alford Desert, Applications and Tools, All tags...
Land facets were created by combining 3 rasters: elevation (seven 600-m bands), soil orders (11 classes) and slope (3 breaks) to produce a 270-m resolution grid. 162 land facets were created, ranging in size from over 9 million hectares in the plateaus of the Columbia Plateau to less than 1,000 hectares in steep, high elevation habitats. These 162 facets were stratified by ecoregions to produce 794 ecofacets which underlie the spatial distribution of biodiversity and the region’s biological richness. Soil Order: Soil orders reflect both geology and time and are based largely on soil forming processes, including exposure to climatic factors and biological processes, as indicated by the presence or absence of major...
This map depicts the density of "More Resilient" cells (defined as the top two quintiles from the stratified resilience dataset) within a 3-km radius of every cell. This provides important additional context when making land protection or restoration decisions. Cells with higher density values are embedded in a larger resilient landscape. These areas are more likely to support biodiversity and ecological function over time in a changing climate. To quantify resilience at the landscape scale, we used a density function, where all cells classified in the final top two resilience quintiles were included in the density calculations, regardless of their underlying Ecofacet, and all other cells were ignored. Looking...
This map is being used as part of the Conserving Nature’s Stage Land Protection Grant process in Idaho, Oregon and Washington. Please see instructions on how to contribute information on potential projects and help The Nature Conservancy and the Land Protection Committee identify land protection priorities for the 2016-2017 grant program by going to http://nature.org/resilienceNW_LandGrants. The dataset consists of the upper two quintiles of unconverted resilient lands with the exclusion of clusters of 10 or fewer contiguous resilient pixels (180 or fewer acres) in areas scoring below 40% for resilience density. The resilience and resilience density layers this dataset is based on are viewable on other maps...
Permeability refers to the degree to which a landscape sustains ecological processes and supports movement of many species by virtue of the structural connectedness of its natural systems (Meiklejohn et al 2010). We used resistant kernel analysis (Compton et al. 2007) to map permeability as a focal statistic based on the resistance data from the terrestrial condition dataset. The analysis evaluates the capacity for ecological flow outward from each focal cell into its local neighborhood up to a maximum of 3-km, then combines the results into a final, study-wide surface. Perm_Score: Our permeability analysis evaluates the connectivity of a focal cell to its ecological neighborhood when the cell is viewed as a source;...
This broad-scale landscape connectivity dataset identifies areas likely to facilitate ecological flow—particularly movement, dispersal, gene flow, and distributional range shifts for terrestrial plants and animals—over large distances and long time periods. Similar to the local permeability analyses (3km radius, Buttrick et al. 2015), this analysis is not species-specific. Rather, it focuses on structural connectivity of natural lands, with resistance to movement modeled as a function of landscape naturalness. This map does not incorporate projections of future climates, nor does it address connectivity for aquatic species. The results identify broad, intact areas where movement of terrestrial organisms is largely...
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We have defined resilience as a function of both a site’s diversity of topoclimates and the site’s ability to support species movement, or terrestrial landscape permeability. Here, we posit that topoclimates provide species localized refugia from the direct effects of a changing climate, whereas landscape permeability reflects the ability of the landscape mosaic to facilitate terrestrial species movement to and between topoclimates as they shift in response to their respective climatic envelopes.90 m topoclimate data, scaled from 0.2 – 1, were multiplied with terrestrial landscape permeability data, scaled from 0 – 1, to generate a resilience value for every 90 m cell across the project area. A full description...
The Nature’s Stage Climate Mapper allows users to explore the geoclimatic stability of HUC5 watersheds within the Pacific Northwest.Geoclimatic Stability, as defined here, is a measure of a natural system’s capacity to remain stable as the climate changes over time. This is based on two factors: * Climate Departure: a measure of how different the future climate is projected to be from the historical climate. * Climate Resilience: a measure of how resilient an area is expected to be to changes in climate (based on topoclimate diversity and landscape permeability).A watershed with lower levels of climate departure and higher levels of climate resilience is more likely to sustain current levels of native biodiversity...
Topoclimate diversity connotes the range of temperature and moisture regimes available to species as local habitat refugia under climate change scenarios (Dobrowski 2010). Areas rich in topoclimatic niches may increase species diversity (Kerr et al. 1997) and increase the likelihood for species persistence across multiple temporal scales (Luoto et al. 2008, Weiss et al. 1988). We defined the Topoclimate Diversity Index (TDI) as a combination of two extant indices, Heat Load Index (HLI) and Compound Topographic Index (CTI), each measured as a focal statistic across a 450-m radius neighborhood. Topo Div_Score: This score represents a focal statistics output (450 m radius from each focal cell), describing the range...
    map background search result map search result map Pacific Northwest Terrestrial Local Landscape Permeability Northwest Basin and Range Synthesis Project Terrestrial Landscape Resilience to Climate Change (90 m) Northwest Basin and Range Synthesis Project Pacific Northwest Terrestrial Local Landscape Permeability Terrestrial Landscape Resilience to Climate Change (90 m)