نتایج جستجو برای: weak rangeland
تعداد نتایج: 143573 فیلتر نتایج به سال:
Rangeland production is a foundational ecosystem service and resource on which livestock, wildlife, people depend. Capitalizing recent advancements in the use of remote sensing data across rangelands, we provide estimates herbaceous rangeland from 1986 to 2019 at 16-d annual time steps 30-m resolution western United States. A factorial comparison this dataset three national scale datasets prese...
Livestock plays an important economic role in Niger, especially in the semi-arid regions, while being highly vulnerable as a result of the large inter-annual variability of precipitation and, hence, rangeland production. This study aims to support effective rangeland management by developing an approach for mapping rangeland biomass production. The observed spatiotemporal variability of biomass...
Remote sensing is often used to assess rangeland condition and biophysical parameters across large areas. In particular, the relationship between the Normalized Difference Vegetation Index (NDVI) and above-ground biomass can be used to assess rangeland primary productivity (seasonal carbon gain or above-ground biomass “yield”). We evaluated the NDVI–yield relationship for a southern Alberta pra...
Increasing shrub density hinders cattle raising in central Argentina rangelands. While roller-chopping and hand-cutting are used to remove shrubs make land accessible for grazing, studies on the effects of these practices ecosystem composition, structure functioning scarce. We assessed impact removal (a) vegetation cover, species richness diversity (b) green biomass seasonal phenological dynami...
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