<div style="text-align:justify;"> With global warming and increased human activity, more and more ground surface areas have been affected, which leads to the creation of many problems. To understand th...<div style="text-align:justify;"> With global warming and increased human activity, more and more ground surface areas have been affected, which leads to the creation of many problems. To understand the ecological environment changes in a typical alpine region, information on landcovers changes in the study area from 2000 to 2020 was obtained by combining remote sensing, geographic information system, and traditional statistical analysis for the Sanjiangyuan National Nature Reserve on the Qinghai-Tibet Plateau, China. The results show that the changes of surface cover in Sanjiangyuan National Nature Reserve are relatively concentrated, mainly distributed in the sections of south, northwest, central, and northeast, with the area of the changed regions and the unchanged regions being 31,127.45 km<sup>2</sup> and 271,941.37 km<sup>2</sup>, respectively. The transformation between the various types of ground landcover is mainly characterized by a shift from other types to grassland and from grassland to bare land. And the regions of change are mostly concentrated between 3500 - 4600 m in elevation. </div>展开更多
Three new species,Phyllocoptes angustais sp.nov.infesting Sibiraea angustata(Rehd.)Hand.-Mazz.(Rosaceae),Aculops brevifolis sp.nov.infesting Caragana brevifolia Kom.(Leguminosae),and Diptacus acutifolius sp.nov.infest...Three new species,Phyllocoptes angustais sp.nov.infesting Sibiraea angustata(Rehd.)Hand.-Mazz.(Rosaceae),Aculops brevifolis sp.nov.infesting Caragana brevifolia Kom.(Leguminosae),and Diptacus acutifolius sp.nov.infesting Cotoneaster acutifolius Turcz.(Rosaceae),are described and illustrated.All mites are collected from Maixiu National Forest Park,Zeku County,Huangnan Tibetan Autonomous Prefecture,Qinghai Province,China and are vagrant on the undersurfaces of leaves of their host plants.展开更多
文摘<div style="text-align:justify;"> With global warming and increased human activity, more and more ground surface areas have been affected, which leads to the creation of many problems. To understand the ecological environment changes in a typical alpine region, information on landcovers changes in the study area from 2000 to 2020 was obtained by combining remote sensing, geographic information system, and traditional statistical analysis for the Sanjiangyuan National Nature Reserve on the Qinghai-Tibet Plateau, China. The results show that the changes of surface cover in Sanjiangyuan National Nature Reserve are relatively concentrated, mainly distributed in the sections of south, northwest, central, and northeast, with the area of the changed regions and the unchanged regions being 31,127.45 km<sup>2</sup> and 271,941.37 km<sup>2</sup>, respectively. The transformation between the various types of ground landcover is mainly characterized by a shift from other types to grassland and from grassland to bare land. And the regions of change are mostly concentrated between 3500 - 4600 m in elevation. </div>
基金This work is supported by Biodiversity Background Survey in Maixiu National Forest Park,Huangnan Tibetan Autonomous Prefecture,Qinghai Province,China.
文摘Three new species,Phyllocoptes angustais sp.nov.infesting Sibiraea angustata(Rehd.)Hand.-Mazz.(Rosaceae),Aculops brevifolis sp.nov.infesting Caragana brevifolia Kom.(Leguminosae),and Diptacus acutifolius sp.nov.infesting Cotoneaster acutifolius Turcz.(Rosaceae),are described and illustrated.All mites are collected from Maixiu National Forest Park,Zeku County,Huangnan Tibetan Autonomous Prefecture,Qinghai Province,China and are vagrant on the undersurfaces of leaves of their host plants.
