نتایج جستجو برای: steppes
تعداد نتایج: 525 فیلتر نتایج به سال:
It was an unprecedented disaster. When the Black Death swept west and northwards through Europe in the dark days of 1347–1351, it brought with it unparalleled suffering and death. With the demographic collapse came social, psychological and economic shock as the survivors struggled to comprehend the enormity of what had befallen. Yet it was also a pivotal point in Western history, maintains Dav...
چکیده ندارد.
Chinese temperate grasslands play an important role in the terrestrial carbon cycle. Based on the parameterization and validation of Terrestrial Ecosystem Model (TEM, Version 5.0), we analyzed the carbon budgets of Chinese temperate grasslands and their responses to historical atmospheric CO2 concentration and climate variability during 1951–2007. The results indicated that Chinese temperate gr...
Under the prevailing variable natural conditions nomadic pastoralism was the most suitable form of land use in Mongolia and the neighboring countries in the past. Furthermore, small areas were used for agriculture in some regions. Therefore, anthropogenic influence was present throughout history. In the forest steppe zone this led to the disappearance of forest sites which then gave way to mead...
A recent discovery of Iron Age burials (Pazyryk culture) in the Altai Mountains of Mongolia may shed light on the mode and tempo of the generation of the current genetic east-west population admixture in Central Asia. Studies on ancient mitochondrial DNA of this region suggest that the Altai Mountains played the role of a geographical barrier between West and East Eurasian lineages until the be...
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