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Showing items 14068 through 14076 of 73602.
Se realiza un recorrido por las principales prácticas forestales en Canadá y particularmente en la provincia de British Columbia. Se describen las principales formas de propiedad, gestión, aprovechamiento y conservación de los bosques.
BACKGROUND: Pastoralism in the USA began coincidently with the initiation of profound ecological change resulting from colonization in the sixteenth century.
This paper examines the relationships between cultivation, livestock grazing and land degradation in Adamawa State. The main objective was to identify areas with major symptoms of degradation, such as rills and gullies, and determine the main causal factor(s), whether cultivation or grazing.
The status of many invasive plant species that are also of high commercial value is contentious. Management of negative impacts depends on the support and co-operation of people who regard the species as an asset.
Coastal dunes and sand areas are reported to be among the habitats most invaded by alien species in Europe. Landscape pattern could be a significant driver in invasion processes in parallel with land-use legacy.
Since mean nitrate concentration along single river channels increases significantly with percent arable land use upstream of sampling points and autumn/early winter flushes in nitrate concentration are widespread, it is generally concluded that farmers contribute most of the nitrate.
The pattern of soil respiration and its responsible factors are still unclear in subalpine ecosystems. In this study, we used a static chamber system to measure soil respiration in a primary Abies fabri (Masters) Craib forest, a secondary A.
We propose an information-theoretic approach to assess the performance of a discrete choice model used to analyze land use and land use change. We show that our disaggregated measure can be used to compare robustness of predictions across land use categories and across models.
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