نتایج جستجو برای: forest and pastures
تعداد نتایج: 16850860 فیلتر نتایج به سال:
Animals selecting habitats often have to consider many factors, e.g., food and cover for safety. However, each habitat type often lacks an adequate mixture of these factors. Analyses of habitat selection using resource selection functions (RSFs) for animal radiotelemetry data typically ignore trade-offs, and the fact that these may change during an animal's daily foraging and resting rhythm on ...
Soil microbial communities under three agricultural management systems (conventionally tilled cropland, hayed pasture, and grazed pasture) and two fertilizer systems (inorganic fertilizer and poultry litter) were compared to that of a w150-y-old forest near Watkinsville, Georgia. Both 16S rRNA gene clone libraries and phospholipid fatty acid (PLFA) analyses indicated that the structure and comp...
While around 20% of the Amazonian forest has been cleared for pastures and agriculture, one fourth of the remaining forest is dedicated to wood production. Most of these production forests have been or will be selectively harvested for commercial timber, but recent studies show that even soon after logging, harvested stands retain much of their tree-biomass carbon and biodiversity. Comparing sp...
We evaluated short- (among months within-years) and long-term (between 1999-2000 2016-2017) temporal patterns of taxonomic functional β- diversity (and its components substitution gain/loss) dung beetle assemblages in forest fragments pastures the Los Tuxtlas Biosphere Reserve (LTBR). Habitat type affected dissimilarity richness difference component, with average values being respectively 1.42 ...
Extended abstract 1- Introduction Changing the forests and pasture landuses to agricultural lands is one of the major global concerns about environmental degradation and climate change. As a result of the rangeland and forest changes into agricultural land and also tillage operations, about 430 million hectares, representing 30% of the world's total plowed land, are annually eroded and leavin...
“Erodibility” is a characteristic of the soil that represents susceptibility with which its particles from most superficial layer are taken and transported to lower places by erosive agents, causing environmental economic damages. This work estimated erodibility in pastures forest areas municipality Porto Velho-Rondônia. In field, three different types vegetation were selected, one brachiaria, ...
Extended abstract 1- Introduction Climate, terrain condition, vegetation coverage, parent materials, and time are among the factors that affect the soil formation and contribute to such soil properties as porosity, apparent and actual specific gravities, and clay and carbonate contents. The forest soils have been consistently regarded for their high content of organic matter and suitable stru...
Question Differences in understorey vegetation between ancient and recent forests have been thoroughly explored; however, few studies investigated the legacies of different former land uses forests. Indeed, due to more intense agricultural practices (tillage fertilisation), legacy effects are expected be stronger cropland or meadows than pastures. Our objectives were compare soil conditions, ta...
Activities of transhumance ongoing have been mostly carried out in alpine pastures for centuries in Turkey. These pastures used unconsciously have faced to the danger of extinction. In order to implement improvement plans in the mentioned areas, qualitative and quantitative characteristics of pastures should be determined. This study was conducted in the mowed and grazed pastures in alpine zone...
To assess the biodiversity consequences of contemporary land-use trends in Northern Europe, where agriculture is being replaced by forestry, we need a better knowledge contributions constituting habitats to biodiversity. Here, use purposefully collected data from 87 sites model how agricultural habitats, including semi-natural pastures, sown temporary grassland (leys), cereal crops, and forest ...
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