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Báo cáo y học: "TCMGIS-II based prediction of medicinal plant distribution for conservation planning: a case study of Rheum tanguticum"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: TCMGIS-II based prediction of medicinal plant distribution for conservation planning: a case study of Rheum tanguticum. | Yu et al. Chinese Medicine 2010 5 31 http www.cmjournal.Org content 5 1 31 CHINESE MEDICINE RESEARCH Open Access TCMGIS-II based prediction of medicinal plant distribution for conservation planning a case study of Rheum tanguticum Hua Yu1t Caixiang Xie1 f Jingyuan Song1 Yingqun Zhou1 3 Shilin Chen1 2 Abstract Background Many medicinal plants are increasingly endangered due to overexploitation and habitat destruction. To provide reliable references for conservation planning and regional management this study focuses on large-scale distribution prediction of Rheum tanguticum Maxim. ex Balf Dahuang . Methods Native habitats were determined by specimen examination. An improved version of GIS-based program for the distribution prediction of traditional Chinese medicine TCMGIS-II was employed to integrate national geographic climate and soil type databases of China. Grid-based distance analysis of climate factors was based on the Mikowski distance and the analysis of soil types was based on grade division. The database of resource survey was employed to assess the reliability of prediction result. Results A total of 660 counties of 17 provinces in China covering a land area of 3.63 X 106 km2 shared similar ecological factors with those of native habitats appropriate for R. tanguticum growth. Conclusion TCMGIS-II modeling found the potential habitats of target medicinal plants for their conservation planning. This technology is useful in conservation planning and regional management of medicinal plant resources. Background More than one-tenth of plant species are used in drugs and health products 1 . The demand for herbal drugs and health products is steadily growing 2 . Thus many medicinal herbs are threatened by overexploitation habitat destruction and lack of proper cultivation practices. Some wild species are disappearing at alarming rates 3 4 . Rheum tanguticum Maxim. ex Balf Dahuang is one of those species. R. tanguticum belongs to the family Polygonaceae and is a .