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  • 1
    Electronic Resource
    Electronic Resource
    Species and plant community distribution in a Mojave-Great Basin desert transition (1991)
    Springer
    Plant ecology 92 (1991), S. 133-150 
    Details
    ISSN: 1573-5052
    Keywords: Mojave desert ; Great Basin desert ; Multivariate analysis ; TWINSPAN ; DECORANA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Multivariate analyses were used to describe the vegetation characteristics of a transition from lowelevation Mojave desert to higher-elevation Great Basin desert. Vegetation data used were from Plutonium Valley in the Nevada Test Site. Data from forty nine releves were analyzed with two classifications (two-day indicator analysis or TWINSPAN and unweighted paried group cluster analysis or CLUSTER). Three ordinations, reciprocal averaging (RA), detrended reciprocal averaging (DCA) and non-metric multidimensional scaling (MNDS), were also used. A rotational correlation analysis was used to determine the vector direction of environmental gradients that correlate best with ordination results. Only token correspondence was found between multivariate classes generated by TWINSPAN and CLUSTER, and seven classes (plant communities) identified from field reconnaissance. The latter seven communities were based on differences in dominant species. Distribution of the vegetation was related more to beta diversity than alpha diversity. Individual species were much less diagnostic than the amount of plant cover, groups or guilds of species or differences in elevation and steepness of slope. Because of the high beta diversity the NMDS ordination gave results with the greatest ease of interpretation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00036034
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A plant succession gradient in a big sagebrush/grass ecosystem (1991)
    Springer
    Plant ecology 94 (1991), S. 57-68 
    Details
    ISSN: 1573-5052
    Keywords: Succession ; Sagebrush-grass ; Chronosequence ; DECORANA ; TWINSPAN
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Rangeland vegetation in the Great Basin of the United States is found in several seral stages depending upon gradients related to distance from water and grazing differences across fencelines. Detailed documentation of vegetation changes was attempted on a representative vegetation type in northern Nevada using a chronosequence approach. Frequency of occurrence appeared to be the vegetation attribute most clearly expressing an axis of change or differences across the site. Soil profile descriptions and soil analyses helped relate plant community changes to abiotic variation. Species, microtopography and soil surface characteristics varied with seral stage. Pattern analysis proved useful for relating vegetation changes to successional stages. Computer-based classification (TWINSPAN) and ordination (DECORANA) techniques defined a successional gradient that differed from a theoretical or assumed successional classification.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00044916
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  • 3
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    Large scale 20mm photography for range resources analysis in the Western United States (1977)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Large scale 70mm aerial photography is a valuable supplementary tool for rangeland studies. A wide assortment of applications were developed varying from vegetation mapping to assessing environmental impact on rangelands. Color and color infrared stereo pairs are useful for effectively sampling sites limited by ground accessibility. They allow an increased sample size at similar or lower cost than ground sampling techniques and provide a permanent record.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: ERIM Proc. of the 11th Intern. Symp. on Remote Sensing of Environment, Vol. 2; p 1507-1514
    Format: application/pdf
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  • 4
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    ERTS-1 evaluation of natural resources management applications in the Great Basin (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The relatively cloud free weather in the Great Basin has allowed the accumulation of several dates of excellent ERTS-1 imagery. Mountains, valleys, playas, stream courses, canyons, alluvial fans, and other landforms are readily delineated on ERTS-1 imagery, particularly with MSS-5. Each band is useful for identifying and studying one or more natural resource features. For example, crested wheatgrass seedings were most easily identified and measured on MSS-7. Color enhancements simulating CIR were useful for depicting meadow and phreatophytic vegetation along water bodies and stream courses. Work is underway to inventory and monitor wildfire areas by age and successional status. Inventories have been completed on crested wheatgrass seedings over the entire State of Nevada, and inventories of playa surfaces, water surfaces, phreatophytic vegetation, snow cover, meadows, and other features is continuing. Vegetation ecotones are being delineated for vegetation mapping. The pinyon/juniper-northern desert shrub ecotone has been identified with considerable success. Phenology changes can be used to describe vegetation changes for management.
    Keywords: GEOPHYSICS
    Type: PAPER-A9 , NASA. Goddard Space Flight Center Symp. on Significant Results obtained from the ERTS-1, Vol. 1, Sect. A and B; p 77-85
    Format: application/pdf
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  • 5
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    Use of satellite imagery for wildland resource evaluation in the Great Basin (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The author has identified the following significant results. Most major vegetation types of Nevada have been mapped with success. The completed set of mosaic overlays will be more accurate and detailed than previous maps compiled by various State and Federal agencies due to the excellent vantage point that ERTS-1 data affords. This new vegetation type map will greatly aid resource agencies in their daily work. Such information as suitable grazing areas, wildlife habitat, forage production, and approximate wildland production potentials can be inferred from such a map. There has been some success in detecting vegetational changes with the use of ERTS-1 MSS imagery, but exposure differences have somewhat confounded the results. Future plans include work to solve this problem.
    Keywords: GEOPHYSICS
    Type: E73-10813 , NASA-CR-133297
    Format: application/pdf
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  • 6
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    Use of satellite imagery for wildland resource evaluation (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The author has identified the following significant results. Accurate identification and delineation of crested wheatgrass seedlings has enabled a broad inventory of this resource. The entire state of Nevada is being inventoried for crested wheatgrass seedlings. Irrigated fields and pastures are easily visible from ERTS-1 imagery and were quantified in total acres on 12,500 square miles of the state. Recent fire scars may be monitored and inventoried from satellite-borne imagery. Inventory and quantification of large native meadows of Nevada have been accomplished on one frame of ERTS-1 data. This inventory would not have been economically feasible with any known ground inventory method. The U-2 sequential data taken in the spring revealed several resource management oriented phenological changes in the vegetation. The green-up of grasses and shrubs was detected on the imagery and supplied a good indicator for livestock turn-out dates. Water level manipulations in the Ruby Marsh were readily detected by noting changes in vegetation growth and reflectance.
    Keywords: GEOPHYSICS
    Type: E72-10253 , NASA-CR-129130
    Format: application/pdf
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  • 7
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    Use of satellite imagery for wildland resource evaluation in the Great Basin (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The author has identified the following significant results. Upon receipt of ERTS-1 imagery, scale and resolution determinations were made. It was found that the scale was quite close to the anticipated 1:1 million, and that each ERTS-1 frame had a coverage of approximately 12,500 square miles. A water body 275 feet across was identified on the MSS 7 band as a determination of maximum resolution. Large cities were easily distinguished on all bands. Paved highways and railroads were able to be identified when there was extreme contrast between these structures and surrounding areas. Landforms were identified on all bands, but band 5 proved superior. Vegetation of varying types was identified using band 7. Fields and agricultural areas were identified as was phreatophytic vegetation. Timber, pinyon-juniper, sagebrush, mountain brush, and annual grassland communities were identified on selected frames. Phenology comparisons of selected test sites were made using sequential U-2 imagery. It was found that gray scale and color IR changes relating to the phenology of certain annual grassland, mountain brush, and marsh communities could be identified. Water bodies were identified and delineated using band 7.
    Keywords: GEOPHYSICS
    Type: E73-10450 , NASA-CR-131250
    Format: application/pdf
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  • 8
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    Natural resource inventories and management applications in the Great Basin (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: ERTS-1 resolution capabilities and repetitive coverage have allowed the acquisition of several statewide inventories of natural resource features not previously completed or that could not be completed in any other way. Familiarity with landform, tone, pattern and other converging factors, along with multidate imagery, has been required. Nevada's vegetation has been mapped from ERTS-1. Dynamic characteristics of the landscape have been studied. Sequential ERTS-1 imagery has proved its usefulness for mapping vegetation, following vegetation phenology changes, monitoring changes in lakes and reservoirs (including water quality), determining changes in surface mining use, making fire fuel estimates and determining potential hazard, mapping the distribution of rain and snow events, making range readiness determinations, monitoring marshland management practices and other uses. Feasibility has been determined, but details of incorporating the data in management systems awaits further research and development. The need is to accurately define the steps necessary to extract required or usable information from ERTS imagery and fit it into on-going management programs.
    Keywords: GEOPHYSICS
    Type: PAPER-A17 , NASA. Goddard Space Flight Center 3d ERTS-1 Symp., Vol. 1, Sect. A; p 267-289
    Format: application/pdf
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  • 9
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    Use of satellite imagery for wildland resource evaluation (1973)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The author has identified the following significant results. Crested wheatgrass seedings have been quantified for the state of Nevada, and have been broken down by county and land status. The wide coverage of ERTS-1 has been found to be extremely useful for putting these seeded areas in the proper perspective for inventory. In the same manner, water bodies are being inventoried and changes relating to time are being monitored. Water resources are critical in Nevada, and this should prove useful to land owners and land managers throughout the state.
    Keywords: GEOPHYSICS
    Type: E73-10019 , NASA-CR-129945
    Format: application/pdf
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  • 10
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    ERTS-1 evaluations of natural resources management applications in the Great Basin (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: ERTS-1 evaluations of natural resources management applications in Great Basin
    Keywords: GEOPHYSICS
    Type: E73-10111 , PAPER-A9 , NASA. Goddard Space Flight Center Agr., Forestry, Range Resources; p 9
    Format: text
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