We assessed habitat preference and population status of the Sichuan Jay (Perisoreus internigrans),a poorly known Chinese endemic bird,at two sites (Zhuoni and Jiuzhaigou) in the Qinghai-Tibetan plateau between 2001 an...We assessed habitat preference and population status of the Sichuan Jay (Perisoreus internigrans),a poorly known Chinese endemic bird,at two sites (Zhuoni and Jiuzhaigou) in the Qinghai-Tibetan plateau between 2001 and 2004.Mean group size was 3.8 jays.Each group occupied a mean home range of 42.0 ha during the breeding season,and the mean internest distance was 2.7 km.These data indicated that the jays used less than ten percent of the available habitats and occurred at an overall density of only 0.6 jays per km2.Radio-tracked Sichuan Jays had a strong preference for mature montane coniferous forests and avoided areas dominated by shrubs,while the utilization of young conifers,grassland,and human residential habitat types did not differ significantly from the values expected from the home-range availabilities of these habitats generally.展开更多
In China,some species of Bupleurum (family Umbelliferae) have been used as Chinese traditional medicine under the name “Chai-Hu” for the treatment of fevers and influenza.In the present paper,the authors report a st...In China,some species of Bupleurum (family Umbelliferae) have been used as Chinese traditional medicine under the name “Chai-Hu” for the treatment of fevers and influenza.In the present paper,the authors report a study on the investigation and exploitation of new medicinal resources of “Chai-Hu” in Qinghai Province and Xizang (Tibet) Autonomous Region where no one has studied this hitherto.18 species,7 varieties,I form of Bupleurum and a new species (Bupleurum qinghaiense) have been discovered.The taxonomy and preliminary phytochemical studies of the roots of three medicinal plants,B.qinghaiense,B.rnarginatum var.stenophyllum and B.smithii var.parvifolium.are reported in this paper.展开更多
基金supported by grants of the National Natural Science Foundation of China(30270202,39870103)Chinese Academy of Sciences(kscx2-yw-z-1021)
文摘We assessed habitat preference and population status of the Sichuan Jay (Perisoreus internigrans),a poorly known Chinese endemic bird,at two sites (Zhuoni and Jiuzhaigou) in the Qinghai-Tibetan plateau between 2001 and 2004.Mean group size was 3.8 jays.Each group occupied a mean home range of 42.0 ha during the breeding season,and the mean internest distance was 2.7 km.These data indicated that the jays used less than ten percent of the available habitats and occurred at an overall density of only 0.6 jays per km2.Radio-tracked Sichuan Jays had a strong preference for mature montane coniferous forests and avoided areas dominated by shrubs,while the utilization of young conifers,grassland,and human residential habitat types did not differ significantly from the values expected from the home-range availabilities of these habitats generally.
文摘In China,some species of Bupleurum (family Umbelliferae) have been used as Chinese traditional medicine under the name “Chai-Hu” for the treatment of fevers and influenza.In the present paper,the authors report a study on the investigation and exploitation of new medicinal resources of “Chai-Hu” in Qinghai Province and Xizang (Tibet) Autonomous Region where no one has studied this hitherto.18 species,7 varieties,I form of Bupleurum and a new species (Bupleurum qinghaiense) have been discovered.The taxonomy and preliminary phytochemical studies of the roots of three medicinal plants,B.qinghaiense,B.rnarginatum var.stenophyllum and B.smithii var.parvifolium.are reported in this paper.
