Land-use/land-cover changes (LUCC), as a long-term international research project,is central to the interests of the science of globle environmental change. It is asignificant agent of change with influences, and is a...Land-use/land-cover changes (LUCC), as a long-term international research project,is central to the interests of the science of globle environmental change. It is asignificant agent of change with influences, and is affected by, climate change, lossof biodiversity, and the sustainability of human-environment interactions. It isclearly an essential component in all considerations of sustainability. The focusareas of LUCC project are land-use dynamics, land-cover changes and regional andglobal models. Since 1995, when LUCC project was proposed, a great progress on manyaspects has been achieved, which is significant to the research on land science inthe future, and to the sustainability of land resources in China.展开更多
Prehistoric human history on the Tibetan Plateau is a hotly debated topic. Archaeological research on the plateau during the past few decades has enormously improved our understanding of the topic and makes it possibl...Prehistoric human history on the Tibetan Plateau is a hotly debated topic. Archaeological research on the plateau during the past few decades has enormously improved our understanding of the topic and makes it possible for us to consider the processes and mechanisms of prehistoric human migration to the region. By reviewing the published archaeological research on the Tibetan Plateau, we propose that the first people on the plateau initially spread into the He-Huang region from the Chinese Loess Plateau, and then moved to the low elevation Northeastern Tibetan Plateau and perhaps subsequently to the entire plateau. This process consisted of four stages.(1) During the climatic amelioration of the Last Deglacial period(15–11.6 ka BP), Upper Paleolithic hunter-gatherers with a developed microlithic technology first spread into the Northeastern Tibetan Plateau.(2) In the early-mid Holocene(11.6–6 ka BP), Epipaleolithic microlithic hunter-gatherers were widely distributed on the northeastern plateau and spread southwards to the interior plateau, possibly with millet agriculture developed in the neighboring low elevation regions.(3) In the mid-late Holocene(6–4 ka BP), Neolithic millet farmers spread into low elevation river valleys in the northeastern and southeastern plateau areas.(4) In the late Holocene(4–2.3 ka BP), Bronze Age barley and wheat farmers further settled on the high elevation regions of the Tibetan Plateau, especially after 3.6 ka BP. Finally, we suggest that all of the reported Paleolithic sites earlier than the LGM on the Tibetan Plateau need further examination.展开更多
文摘Land-use/land-cover changes (LUCC), as a long-term international research project,is central to the interests of the science of globle environmental change. It is asignificant agent of change with influences, and is affected by, climate change, lossof biodiversity, and the sustainability of human-environment interactions. It isclearly an essential component in all considerations of sustainability. The focusareas of LUCC project are land-use dynamics, land-cover changes and regional andglobal models. Since 1995, when LUCC project was proposed, a great progress on manyaspects has been achieved, which is significant to the research on land science inthe future, and to the sustainability of land resources in China.
基金supported by National Natural Science Foundation of China (Grant Nos. 41101087 & 41171168)the Project of Tracing Civilization Origin (Grant No. 2013BAK08B02)Primary Supports for Scientific Research of Lanzhou University (Grant Nos. LZUJBKY-2014-121, LZUJBKY-2016-159, LZUJBKY-2015-K09 & LZUJBKY-2014-120)
文摘Prehistoric human history on the Tibetan Plateau is a hotly debated topic. Archaeological research on the plateau during the past few decades has enormously improved our understanding of the topic and makes it possible for us to consider the processes and mechanisms of prehistoric human migration to the region. By reviewing the published archaeological research on the Tibetan Plateau, we propose that the first people on the plateau initially spread into the He-Huang region from the Chinese Loess Plateau, and then moved to the low elevation Northeastern Tibetan Plateau and perhaps subsequently to the entire plateau. This process consisted of four stages.(1) During the climatic amelioration of the Last Deglacial period(15–11.6 ka BP), Upper Paleolithic hunter-gatherers with a developed microlithic technology first spread into the Northeastern Tibetan Plateau.(2) In the early-mid Holocene(11.6–6 ka BP), Epipaleolithic microlithic hunter-gatherers were widely distributed on the northeastern plateau and spread southwards to the interior plateau, possibly with millet agriculture developed in the neighboring low elevation regions.(3) In the mid-late Holocene(6–4 ka BP), Neolithic millet farmers spread into low elevation river valleys in the northeastern and southeastern plateau areas.(4) In the late Holocene(4–2.3 ka BP), Bronze Age barley and wheat farmers further settled on the high elevation regions of the Tibetan Plateau, especially after 3.6 ka BP. Finally, we suggest that all of the reported Paleolithic sites earlier than the LGM on the Tibetan Plateau need further examination.
