نتایج جستجو برای: steppes region
تعداد نتایج: 538411 فیلتر نتایج به سال:
Ecological sites are the basic entity used in rangeland health assessment. This study evaluates the synergistic use of multiand hyper-spectral satellite imagery for sub-pixel classification of ecological sites in semiarid rangelands. Hyperion and Landsat enhanced thematic mapper (ETM) data are included in a two-step procedure to mapping ecological sites in Patagonian rangelands of Argentina. Fi...
It is unclear whether Indo-European languages in Europe spread from the Pontic steppes in the late Neolithic, or from Anatolia in the Early Neolithic. Under the former hypothesis, people of the Globular Amphorae culture (GAC) would be descended from Eastern ancestors, likely representing the Yamnaya culture. However, nuclear (six individuals typed for 597 573 SNPs) and mitochondrial (11 complet...
Grasshoppers can greatly interfere with agriculture and husbandry, they will breed grow rapidly in suitable habitats. Therefore, it is necessary to extract the distribution of grasshopper potential habitat (GPH), analyze spatial-temporal characteristics GPH, detect different effects key environmental factors meadow typical steppe. To achieve goal, this study took two steppe types Xilingol (the ...
Abstract Changes in land use and climate are the main drivers of change soil organic matter contents. We investigated impact largest policy-induced conversion to arable land, Virgin Lands Campaign (VLC), from 1954 1963, massive cropland abandonment after 1990 on carbon (SOC) stocks steppes Russia Kazakhstan. simulated budgets pre-VLC period (1900) until 2100 using a dynamic vegetation model ass...
The present study focuses on the mosaic-like occurrences of patches steppes and fore-steppes in Pannonian forest-steppe zone. We current vegetation, which is maintained including by human landscape use, i.e., grazing mowing. area complex for this reason it shows changes differences vegetation more diversely. wanted to answer questions: Do sand forest-steppes occur Ipoly Valley what location? Wh...
Nostoc flagelliforme, a filamentous nitrogen-fixing cyanobacterium, is widely distributed in arid steppes of the west and northwestern parts of China. However, as a food delicacy this species has been overexploited from 1970 to 2000. Moreover, overgrazing, land reclamation and the removal of medicinal herbs have caused severely reduced vegetation coverage there. In this communication, a badly d...
the caspian sea contains great resources of oil and gas. the caspian sea is a 700- mile- long body of water in central asia, land located between azerbaijan, iran, kazakhstan, russia and turkmenistan. iran was challenges and opportunities in the caspian region. key question in this thesis includes three section that first question, opportunities of iran in the caspian region, second question ch...
Habitat use by European wildcats (Felis silvestris) in central Spain: what is the relative importance of forest variables?— Habitat preferences of wildcats are controversial. Although they are usually considered a forest species, alternative environments such as scrubland can be preferred. In this study we compared five habitat types in relation to wildcat occurrence. Sampling was carried out b...
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