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This database is a compilation database of all available land trust and TNC conservation data
Categories: Data;
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Tags: Areas,
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Easements,
Land Trust,
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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...
The Science and Policy of the First Environmental Flows to the Colorado River Delta The first transboundary flow of water for the environment was delivered to the Colorado River Delta in spring of 2014. This engineered mini-spring flood of 130 million cubic meters (105,000 acre-feet) was implemented as part of Minute 319, an addition to the 1944 U.S.-Mexico Water Treaty. Minute 319 is a temporary agreement, expiring in 2017. Teams of scientists from government agencies, universities, and environmental NGOs from both the U.S. and Mexico are measuring the surface flow rates, inundation, ground water recharge, ground water levels and subsurface flows, geomorphic change, recruitment, survival and health of vegetation,...
Just Add Water: Historic Return Of The Colorado River To Its Delta, United States And Mexico On May 15, 2014, the Colorado River reached the sea for the first time in decades. This was but one highlight of an unprecedented experiment in binational water management – the world’s first transboundary water allocation for the environment. Minute 319, signed by Mexico and the United States in 2012, changes the way the two countries share water in the over-allocated Colorado River basin. One of its provisions is a “pulse flow” of 105,000 acre-feet of water released from Morelos Dam into the parched Colorado River delta. Implemented in March-May 2014, the pulse flow was intended to emulate the ecological functions of...
Tags: The Nature Conservancy
The National Park Service (NPS), in conjunction with the Biological Resources Division (BRD) of the U.S. Geological Survey (USGS), has implemented a program to "develop a uniform hierarchical vegetation methodology" at a national level. The program will also create a geographic information system (GIS) database for the parks under its management. The purpose of the data is to document the state of vegetation within the NPS service area during the 1990's, thereby providing a baseline study for further analysis at the Regional or Service-wide level. The vegetation units of this map were determined through stereoscopic interpretation of aerial photographs supported by field sampling and ecological analysis. The vegetation...
Number of harmful species that have invaded freshwater habitats, by freshwater ecoregion. The occurrence and ecological impact for freshwater invasive species were compiled in a geographically referenced database according to the methods of Molnar et al. (2008). Information about 550 species was systematically collected from a wide variety of global, regional, national, and subnational data sources. Non-native distributions were documented by freshwater ecoregion. The threat of each species to native biodiversity was scored using the following categories: 4, disrupts entire ecosystem processes with wider abiotic influences; 3, disrupts multiple species, some wider ecosystem function, and/or keystone species or...
Area of coral reefs (square kilometers), by marine ecoregion. We extracted coral reefs from version 7.0 of the global one-kilometer raster data set compiled by the UNEP-WCMC update of 2003 (for more information about the source data set, e-mail spatialanalysis@unep-wcmc.org), which is almost entirely identical to the data published in the World Atlas of Coral Reefs (Spalding et al. 2001). They represent a combination of line and polygon information converted to a one-kilometer grid to smooth data originally drawn at different scales. We made minor modifications to the global map, by removing reef areas from West Africa and the Leeuwin and Southern California Bight ecoregions. The latter represents erroneous data,...
Relative abundance of kelp forest habitat, by marine province. We developed estimates of abundance of kelp forests. Originally we gathered this information at an ecoregional scale, but we decided to summarize to province due to concerns about fine-scale accuracy. Where information was not readily available, provinces were labeled âno data.â We used the following data sources: Robinson, A. R., and K. H. Brink, eds. 1998. The Global Coastal Ocean, Regional Studies and Syntheses. New York: Wiley. âââ, eds. 2006. The Global Coastal Ocean: Interdisciplinary Regional Studies and Syntheses. Cambridge, MA: Harvard University Press. Sheppard, C., ed. 2000a. Seas at the Millennium: An Environmental Evaluation, Volume...
Percent of ecoregion area that is arable and not yet converted. We developed the map of arable land not yet converted to agriculture from data provided by Fischer et al. (2002). Our map was produced by modeling the moderate- to high-yielding climate-soil envelopes for nine major world crops and projecting those areas geographically in regions that are not classified as urban or agricultural by JRC (2003). It represented rain-fed agriculture only, so the area of arable land is likely underestimated. It also does not account for changing future demands for irrigated agriculture that are driven by national policy and finance. These data were derived by The Nature Conservancy, and were displayed in a map published...
Dominant type of groundwater aquifer, by freshwater ecoregion. We derived the dominant groundwater features from the Groundwater Resources of the World data set, a product of the World-wide Hydrogeological Mapping and Assessment Programme (WHYMAP) (Struckmeir and Richts 2007). The WHYMAP Groundwater feature containing the largest surface area within an ecoregion was deemed the dominant feature. Groundwater classes are equivalent to classes stated in the WHYMAP data set. These data were derived by The Nature Conservancy, and were displayed in a map published in The Atlas of Global Conservation (Hoekstra et al., University of California Press, 2010). More information at http://nature.org/atlas. Data derived from:...
Number of seabird species, by marine ecoregion. Using the distribution maps for seabirds from Harrison (1983), we visually mapped each of the 312 seabirds to one or more marine ecoregions. Only breeding ranges (including breeding sites) were used; migration routes and casual or vagrant records were excluded. These data were derived by The Nature Conservancy, and were displayed in a map published in The Atlas of Global Conservation (Hoekstra et al., University of California Press, 2010). More information at http://nature.org/atlas. Data derived from: Harrison, P. 1983. Seabirds: An Identification Guide. London: Christopher Helm.
The National Park Service (NPS), in conjunction with the Biological Resources Division (BRD) of the U.S. Geological Survey (USGS), has implemented a program to "develop a uniform hierarchical vegetation methodology" at a national level. The program will also create a geographic information system (GIS) database for the parks under its management. The purpose of the data is to document the state of vegetation within the NPS service area during the 1990's, thereby providing a baseline study for further analysis at the Regional or Service-wide level. The vegetation units of this map were determined through stereoscopic interpretation of aerial photographs supported by field sampling and ecological analysis. The vegetation...
This data set includes tables providing location, environmental, vegetation, soils, and carbon sampling data collected in 2015 and 2016 at vegetation sampling units on restored areas and other habitats at sites in northeast Indiana, USA. "Sample_units.txt" provides location, environmental, soil physical and chemical properties for each sample location. "Subplot_ground_flora.txt" provides subplot estimates of cover for each ground flora species in each each subplot; "Plot_ground_flora.txt" provides plot-level estimates of cover for each ground flora species in each plot. "Woody_stems.txt" provides diameter at breast height measurements and height estimates for woody species with measurable diameters at 1.4 m. "Downed_wood_less_than_3_in_diameter.txt"...
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