منابع مشابه
Fire Severity Modeling of Sagebrush-Steppe Rangelands in Southeastern Idaho
The potential for high severity fires to affect changes in rangelands is considerable, and for this reason, assessing fire severity is critical. We explored fire severity modeling in rangelands by applying post-fire field observations to Satellite Pour l'Observation de la Terre 5 (SPOT 5) imagery using Classification Tree Analysis (CTA) techniques at two 2005 burns. The results of these analyse...
متن کاملMeasuring plant cover in sagebrush steppe rangelands: a comparison of methods.
Methods that are more cost-effective and objective are needed to detect important vegetation change within acceptable error rates. The objective of this research was to compare visual estimation to three new methods for determining vegetation cover in the sagebrush steppe. Fourteen management units at the US Sheep Experiment Station were identified for study. In each unit, 20 data collection po...
متن کاملFinal Report: Assessing Post-Fire Recovery of Sagebrush-Steppe Rangelands in Southeastern Idaho
Correcting satellite imagery for atmospheric effects is a common procedure today. Indeed there are many techniques and software applications that offer atmospheric correction processes. This study compared several techniques (apparent reflectance, dark-object subtraction, Cos(t), and the full cost model) in both Idrisi and ENVI software to determine the level of similarity between resulting ima...
متن کاملPerceptions of ranchers about medusahead (Taeniatherum caput-medusae (L.) Nevski) management on sagebrush steppe rangelands.
Medusahead (Taeniatherum caput-medusae (L.) Nevski) is an exotic annual grass invading rangelands in the western United States. Medusahead is a serious management concern because it decreases biodiversity, reduces livestock forage production, and degrades the ecological function of rangelands. Despite the obvious importance of ranchers as partners in preventing and managing medusahead in rangel...
متن کاملIndirect Measurement of Leaf Area Index in California North Coast Vineyards
The performance of the LI-COR LAI-2000 Plant Canopy Analyzer (PCA) for indirect measurement of leaf area index (LAI) was evaluated in vineyards of Californiaʼs North Coast region. Twelve plots were established, representing vineyards of differing trellis, cultivar, and planting density. Mean LAI ranged from 0.5to 2.25-m2 leaf area per m2 ground area by direct measurement (defoliation). Indirect...
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ژورنال
عنوان ژورنال: Rangeland Ecology & Management
سال: 2012
ISSN: 1550-7424
DOI: 10.2111/rem-d-11-00069.1