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Filters: Tags: {"type":"Subject","name":"land cover"} (X) > Types: OGC WMS Layer (X)

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Esta sección le ofrece seis sistemas de consulta geográfica y un módulo de solicitud de imágenes satelitales: Mosaico nacional de imágenes Muestra un continuo nacional de imágenes de satélite, formado por alrededor de 811 imágenes de 60 por 60 kilómetros, con resolución espacial de 2.5 metros. Mapas dinámicos Le permite explotar la base de datos agropecuaria y pesquera SIACON para generar sus propios mapas tematizados, seleccionando áreas específicas y manipulando capas de datos para ellas. Zonas áridas Sistema que ofrece información sobre las zonas climáticas en México, poniendo énfasis en los productos no maderables característicos de las zonas áridas. Infraestructura del sector agroalimentario Le presenta información...
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In the drier, mid- and low-elevation portions of the Southern Rockies LCC, Fremont cottonwood represents the only native vegetation of tall stature, and cottonwood-dominated woodlands provide critical habitat for a large array of neotropical migratory birds and other animals. These woodlands likely dominated alluvial reaches of all streams where a snowmelt-driven spring flood was the major factor driving geomorphic and vegetation dynamics. These woodlands were also among the first habitats to undergo transformation as the regions land and water resources were developed.The PI coauthored a paper (Andersen et al. 2007) on assessing the amount of native Fremont cottonwood forest remaining on floodplains in 26 subbasins...
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Floods have become increasingly prominent in recent decades causing devastating effects on lives and livelihoods worldwide. Efficient tools to assess the drivers of floods, such as increasing urbanization, could help to minimize flood hazards. Urbanization increases the design peak flow (maximum potential surface water flow from a precipitation event with an average probability of occurring once in a specific recurrence interval), which is a key information needed for designing stormwater management infrastructures such as culverts and storm sewers. A web-based application was developed to explore the potential changes (1985 to 2020) in design peak flow of urban areas across the conterminous United States driven...
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Conclusions: Elevation, slope and the percentages of bogs and fens in a landscape influence the degree to which mid-boreal lakes are sensitive to acidic deposition orignating from nearby mining operations. Thresholds/Learnings: Synopsis: This study evaluates the acid sensitivity of lakes in Saskatchewan within ~300km of Fort McMurray. The study area is downwind of atmospheric emissions sources from regional oil sands mining operations and there is concern that the lakes may be threatened by acidification. A helicopter sampling program was implemented in late September 2007 and 2008 to measure 16 chemical variables (e.g., Ca, Mg, Na, pH) and 15 environmental variables (e.g., latitude, elevation, slope, percent bog,...
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Synopsis: This study investigates the relationships of landscape disturbance, altered prey resources, and rattlesnake populations in the Upper Snake River Plain of southeastern. Researchers used radio telemetry to track rattlesnakes while concurrently conducting habitat sampling and small mammal trapping in areas used by snakes and in random locations. Disturbed areas (by grazing and/or burning) were characterized by lower biological crust cover, shrub cover, shrub height, and shrub dispersion, as well as higher grass and bare soil cover. Disturbed areas were also characterized by lower proportions of small animal biomass, abundance, and large prey species (such as chipmunks), while the proportions Conclusions:...
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SUMMARY This publication is intended to provide a framework for tri- and binational cooperation between Canada, the United States and Mexico that promotes the conservation and sustainable use of central North American grasslands. It does so by providing a trinational overview of information about the central North American grasslands and the conservation issues faced in the region. This contextual framework seeks to move the conservation agenda forward to the eventual development of a conservation strategy for the grasslands of North America that will integrate, build upon and enhance individual initiatives found in the three countries of North America that could complement each other. RESUMEN El propósito de...
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TNRIS was established by the Legislature in 1968 as the Texas Water-Oriented Data Bank. In 1972, after four years of growth and diversification, it was renamed the Texas Natural Resources Information System. TNRIS is defined as the following in Sec. 16.021 of the Texas Water Code: Sec. 16.021. TEXAS NATURAL RESOURCES INFORMATION SYSTEM. (a) The executive administrator shall establish the Texas Natural Resources Information System (TNRIS) to serve Texas agencies and citizens as a centralized clearinghouse and referral center for: natural resource data; census data; data related to emergency management; and other socioeconomic data. Who we are Our staff includes individuals trained in the natural, computer and...
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Detailed and accurate land cover and land cover change information is needed for South America because the continent is in constant flux, experiencing some of the highest rates of land cover change and forest loss in the world. The land cover data available for the entire continent are too coarse (250 m to 1 km) for resource managers, government and non-government organizations, and Earth scientists to develop conservation strategies, formulate resource management options, and monitor land cover dynamics. We used Landsat 30 m satellite data of 2010 and prepared the land cover database of South America using state-of-the-science remote sensing techniques. We produced regionally consistent and locally relevant land...


    map background search result map search result map Chemical characteristics and acid sensitivity of boreal headwater lakes in northwest Saskatchewan. Linking landscape disturbance to the population ecology of Great Basin rattlesnakes (Crotalus oreganus lutosus) in the Upper Snake River Plain A GIS-Based Evaluation of Fremont Cottonwood Stand Dynamics in the SRLCC Información Geoespacial Texas Natural Resources Information System (TNRIS) Grasslands: Toward a North American Conservation Strategy/ Pastizales: Hacia una estrategia de conservación para los pastizales de América del Norte South America Land Cover Characterization 2010 A Web-Based Application for Exploring Potential Changes in Design Peak Flow of US Urban Areas Driven by Land Cover Change Chemical characteristics and acid sensitivity of boreal headwater lakes in northwest Saskatchewan. Linking landscape disturbance to the population ecology of Great Basin rattlesnakes (Crotalus oreganus lutosus) in the Upper Snake River Plain A GIS-Based Evaluation of Fremont Cottonwood Stand Dynamics in the SRLCC Texas Natural Resources Information System (TNRIS) Información Geoespacial South America Land Cover Characterization 2010 A Web-Based Application for Exploring Potential Changes in Design Peak Flow of US Urban Areas Driven by Land Cover Change Grasslands: Toward a North American Conservation Strategy/ Pastizales: Hacia una estrategia de conservación para los pastizales de América del Norte