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Maize is the New World’s preeminent grain crop and it provided the economic basis for human culture in many regions within the Americas. To flourish, maize needs water, sunlight (heat), and nutrients (e.g., nitrogen). In this paper, climate and soil chemistry data are used to evaluate the potential for dryland (rain-on-field) agriculture in the semiarid southeastern Colorado Plateau and Rio Grande regions. Processes that impact maize agriculture such as nitrogen mineralization, infiltration of precipitation, bare soil evaporation, and transpiration are discussed and evaluated. Most of the study area, excepting high-elevation regions, receives sufficient solar radiation to grow maize. The salinities of subsurface...
Categories: Publication;
Types: Citation;
Tags: Anthropology,
Archaeology,
Maize agriculture,
Soil ch
This simple assessment raster is used to answer management questions (MQs) about where change agents (CAs) overlap with BLM high biodiversity sites (HBS) in the Central Great Basin and Range Ecoregion. This is a basic footprint assessment of anthropogenic features (urban development, roads, etc) intersect with the areas of HBS. The HBS were derived from source data characterizing locations with concentrated at-risk biodiversity or existing source data of a prioritization exercise that identified areas of high conservation significance. It does not model actual response or condition of the HBS to the CAs. The data intersects two primary classes of information: The CAs consist of 19 classes which represent different...
Some of the YKL rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - As a final measure of potential human impacts to the ecoregions, the impacts of current and long term potential anthropogenic development are summarized in a 60 x 60 m grid by the landscape condition model (LCM). The LCM weights the relative influence of different types of human footprints based on factors like permanence,...
This data set contains distances between anthropogenic features and grasslands classified into three categories based on metrics from KEA tables in the Middle Rockies Ecoregion. Antrhropogenic fetures include roads, electrical transmission lines, housing density, wind turbine, and oil and gas wells, This data is intended for use at the ecoregional level and was derived from spatial environmental attributes and grasslands locations.
This dataset contains TIGER roads, electrical transmission lines, Integrated Climate and Land Use Scenarios (ICLUS), wind turbine, and oil and gas wells, Data was reclassified and merged together to create a an anthropogenic layer.
This raster dataset is the result of a subtraction of the classification of raster datasets bhd2030us and bhd2000us. Both are produced using the SERGoM v3 model, they depict housing density for the coterminous US in 2030 and 2000, resp., and are based on 2000 US Census Bureau block (SF1) datasets. (The classication of the subtraction is shown below.) A raster layer that portrays not-developed (and assumed to be undevelopable) called CUS_UPP_100 depicts protected/unprotected lands and Census water polygons. First, Land was removed from blocks (reducing the area of a block, but not its number of housing units -- assuming that private housing units must be on private land) that was public and/or protected in the UNPROTPRIV100...
This simple assessment raster is used to answer management questions (MQs) about where change agents (CAs) overlap with BLM Herd Management Areas (HMAs) in the Central Great Basin and Range Ecoregion. This is a basic footprint assessment of anthropogenic features (urban development, roads, etc) intersect with areas managed for wild horses and burros in the western US. It does not model actual response or condition of the HMAs to the CAs. The data intersects two primary classes of information: The CAs consist of 19 classes which represent different types of human infrastructure on the landscape. Some types are easily defined, precise footprints (pipelines, roads, energy development areas) while others are broader...
This map shows all the places conservation elements. Some of the places included exhibit high biodiversity or ecological and cultural value. This map also shows other managed areas from the Protected Areas Database, as well as those that are excluded. Associated input datasets are also included; they relate to biodiversity, special areas, and development. These data are provided by Bureau of Land Management (BLM) "as is" and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics...
These data were reprojected to USA_Contiguous_Albers_Equal_Area_Conic_USGS_version and clipped to the MAR REA boundary. This raster dataset is a classification of bhdXXXXbc (base case scenario) from ICLUS v1.2 which is produced using the SERGoM v3 model, depicts housing density for the coterminous US in 2000, based on 2000 US Census Bureau block (SF1) datasets. (The classication is shown below.) A raster layer that portrays not-developed (and assumed to be undevelopable) called DEV20091024_depicts protected/unprotected lands and Census water polygons. Land was removed from blocks (reducing the area of a block, but not its number of housing units -- assuming that private housing units must be on private land) that...
Urban areas in New Mexico.
Types: Downloadable;
Tags: Anthropology,
BLM,
Boundaries,
Bureau of Land Management,
Cartographic Boundary,
U.S. National Atlas Cities represents cities and towns in the United States, Puerto Rico, and U.S. Virgin Islands.
This data set contains distances between anthropogenic features and grasslands classified into three categories based on metrics from KEA tables in the Northwest Plains Ecoregion. Antrhropogenic fetures include roads, electrical transmission lines, housing density, wind turbine, and oil and gas wells, This data is intended for use at the ecoregional level and was derived from spatial environmental attributes and grasslands locations.
A polygon dataset of current and future community footprints in the SNK REA derived from the Tiger/Line File with modification (see the process steps for details). (The TIGER/Line Files are shapefiles and related database files (.dbf) that are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line File is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. The TIGER/Line Files include both incorporated places...
Types: Downloadable;
Tags: Anthropology,
BLM,
Bureau of Land Management,
CDP,
Census Designated Place,
Some of the YKL rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - To provide a more comprehensive measure of potential impacts to the ecoregions, we summarize all the potential impacts to Conservation Elements (CEs) generalized to the 5th-level hydrologic units under what we call the Cumulative Impacts assessment. The measurement of cumulative impacts has become increasingly emphasized both...
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: A1-Native-Aboriginal Ways,
A1-Wildlife,
Anthropology,
Archaeology,
Ethnography,
Lake Minchumina past and present. A short history of the native village of Tanana, Dichinanek'Hwt'Ana: A history of the people of the upper Kuskokwim who live in Nikolai and Telida, Alaska; Cantwell native village history
The Kennecott Cemetery is a component landscape of the Kennecott Mines National Historic Landmark. It is located a quarter mile south from the Kennecott Mill Town site, within the boundaries of Wrangell-St. Elias National Park and Preserve, Alaska. The cemetery is accessed by the old Wagon Road, the original access road for the Kennecott Mill Town before the railroad was completed in 1911. This road has also been referred to as the South Glacier Trail. The site boundaries include all known historic features and relevant landscape characteristics within the cemetery associated with the settlement and social history of Kennecott. Contributing features include fifty grave markers, subterranean structures, fences and...
Categories: Publication;
Types: Citation;
Tags: Anthropology,
Wrangell-St. Elias National Park and Preserve,
and ethnology,
archaeology
Dena'ina oral tradition indicates that the antecedent worldview brought with the migrating Athabascan Dena'ina into the Cook Inlet Basin and the Lake Clark/Iliamna Lake region included dual organization, perhaps moieties, matrilineal descent, a preferential rule for cross cousin marriage, and customs in which on ceremonial occasions guests would perform services for hosts, who recompensed the former with goods. Archaeological and ethnographic evidence is summarized in this thesis that indicates that the Dena'ina communal hunting and gathering and intensive salmon fishing strategy, in combination with borrowed Alutiiq technology, was a successful adaptation to the maritime/riverine environment of the Cook Inlet Basin...
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