نتایج جستجو برای: forest and pastures
تعداد نتایج: 16850860 فیلتر نتایج به سال:
Five contrasting deciduous forest stands were studied to characterise the spatial structural 23 variability in human-influenced forests. These stands are representative of cultural forest types 24 widely represented in western Europe: one plantation, two coppices, one wood-pasture, and one 25 high forest stand. All stems with DBH > 5 cm were measured and mapped, and stem DBH 26 distributions, s...
For 2 grazing seasons, effects of pasture size, stream access, and off-stream water on cow distribution relative to a stream were evaluated in six 12.1-ha cool-season grass pastures. Two pasture sizes (small [4.0 ha] and large [12.1 ha]) with 3 management treatments (unrestricted stream access without off-stream water [U], unrestricted stream access with off-stream water [UW], and stream access...
For early-successional species, road and powerline cuts through forests provide refugia and source populations for invading adjacent forest gaps. Within an 800 km’ forest matrix in South Carolina, we determined if width. disturbance frequency or linear features of road and powerline cuts influenced the mound distribution of the red imported tire ant, Solenopsis invicta Buren. For each of live l...
In the Brazilian Amazon, two monospecific genera, the Harpy Eagle and Crested Eagle have low densities and are classified by IUCN as Near Threatened due to habitat loss, deforestation, habitat degradation and hunting. In this study, we evaluate occurrence of these large raptors using the environmental surveys database from Belo Monte Hydroelectric Power Plant. Integrating the dataset from two m...
We synthesize findings to date from the world’s largest and longest-running experimental study of habitat fragmentation, located in central Amazonia. Over the past 32 years, Amazonian forest fragments ranging from 1 to 100 ha have experienced a wide array of ecological changes. Edge effects have been a dominant driver of fragment dynamics, strongly affecting forest microclimate, tree mortality,...
In 1995, Mycobacterium bovis, the causative bacterium of bovine tuberculosis (bTB), was detected in 5 beef cattle operations in Alcona County, Michigan, USA. In accordance with Federal law, the operations were depopulated to prevent the spread of bTB. Subsequent wildlife surveillance programs identified high prevalence of M. bovis in mesocarnivores, including raccoons (Procyon lotor), which sug...
The drained bottom of the Aral Sea covers an area about 6 million hectares, which 3.2 hectares are located on territory Republic Uzbekistan. In addition to fact that salt is spread from bottom, dust and sand causing enormous damage environment, there a forest suitable 1.5 where it possible create desert shrub agrophytocenoses. purpose work was develop most effective methods for creating agrophy...
Abstract Maximizing biodiversity persistence in heterogeneous human-modified landscapes is hindered by the complex interactions between habitat quality and configuration of native non-native habitats. Here we examined these considering avian diversity across 26 sampling sites, each which comprised three points located a gradient disturbance: core fragment, fragment edge, adjacent matrix. The 78...
Land use change , particularly the conversion of forest to agriculture, is an important driver climate but rarely considered a major factor in northern temperate regions. This study explored impacts clearing for agriculture northeastern United States, hypothesizing that compared managed cool-season pasture, silvopasture would moderate changes surface temperature, soil greenhouse fluxes, and car...
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