Traditional agroecosystems play an important role in the conservation of biodiversity and in sustainable development.As a typical type of traditional agroecosystem,traditional homegardens have been receiving increasin...Traditional agroecosystems play an important role in the conservation of biodiversity and in sustainable development.As a typical type of traditional agroecosystem,traditional homegardens have been receiving increasing attention from scientists,especially ethnobotanists.They are considered as germplasm banks for many crops and other economic plants.They are also a key site for domestication of wild plants.Current ethnobotanical studies on homegardens focus on their structures,floristic composition,and contributions to their owners.Traditional homegardens often show complicated structures,diverse floristic compositions,multiple functions,low input(including labor and money),and ecological and socioeconomic sustainability.The characteristics and functions of traditional homegardens are closely related to many factors,such as their geographic location and the cultural backgrounds and socioeconomic conditions of their owners.Many researches on homegardens are conducted in the tropics.There are few studies on the dynamics of traditional homegardens,especially those located in temperate,arid and semi-arid zones.The dynamics of homegardens and the factors affecting these processes will be a fruitful field for future research.展开更多
The Achnatherum splendens community is an important type of warm steppe vegetation which plays a very important role in environmental protection in the area along the Qinghai-Tibet Railway.In order to understand its d...The Achnatherum splendens community is an important type of warm steppe vegetation which plays a very important role in environmental protection in the area along the Qinghai-Tibet Railway.In order to understand its dynamic features,the characteristics of the A.splendens community,such as spatial distribution pattern,species richness and biomass,were examined near Haiyan County,Qinghai Province.Results showed that the A.splendens community consisted of two types of mosaic patches,the microaggregation dominated by A.splendens and the microaggregation dominated by Stipa sp.The number and size of the two patches showed an interesting distribution pattern.The A.splendens patch decreased with increasing distance away from the railway,while species diversity increased.The total coverage of A.splendens was significantly higher than that of Stipa sp.The number and size of patches may indicate the degradation of the A.splendens community,which could be accelerated by human activities.Based on the characteristics and status quo of the A.splendens community,we suggest that some measures be taken to control human activities and rodents to conserve the A.splendens community.展开更多
基金This research was supported by the National Natural Science Foundation of China(Grant No.30770220).
文摘Traditional agroecosystems play an important role in the conservation of biodiversity and in sustainable development.As a typical type of traditional agroecosystem,traditional homegardens have been receiving increasing attention from scientists,especially ethnobotanists.They are considered as germplasm banks for many crops and other economic plants.They are also a key site for domestication of wild plants.Current ethnobotanical studies on homegardens focus on their structures,floristic composition,and contributions to their owners.Traditional homegardens often show complicated structures,diverse floristic compositions,multiple functions,low input(including labor and money),and ecological and socioeconomic sustainability.The characteristics and functions of traditional homegardens are closely related to many factors,such as their geographic location and the cultural backgrounds and socioeconomic conditions of their owners.Many researches on homegardens are conducted in the tropics.There are few studies on the dynamics of traditional homegardens,especially those located in temperate,arid and semi-arid zones.The dynamics of homegardens and the factors affecting these processes will be a fruitful field for future research.
基金This work was supported by the National Natural Science Foundation of China(Grant No.90202012)the National Basic Research Program of China(No.2005CB422006).
文摘The Achnatherum splendens community is an important type of warm steppe vegetation which plays a very important role in environmental protection in the area along the Qinghai-Tibet Railway.In order to understand its dynamic features,the characteristics of the A.splendens community,such as spatial distribution pattern,species richness and biomass,were examined near Haiyan County,Qinghai Province.Results showed that the A.splendens community consisted of two types of mosaic patches,the microaggregation dominated by A.splendens and the microaggregation dominated by Stipa sp.The number and size of the two patches showed an interesting distribution pattern.The A.splendens patch decreased with increasing distance away from the railway,while species diversity increased.The total coverage of A.splendens was significantly higher than that of Stipa sp.The number and size of patches may indicate the degradation of the A.splendens community,which could be accelerated by human activities.Based on the characteristics and status quo of the A.splendens community,we suggest that some measures be taken to control human activities and rodents to conserve the A.splendens community.
