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检索条件"作者=Rui Wang~1,Yin-zheng Wang~2,Fang-hao Wan~1 1.State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection, Chinese Academy of Agricultural Sciences,Beijing,100094,China 2.State Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany,Chinese Academy of Sciences,Beijing,100093,China"

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Multiple factors relating to the rapid expansion of an invasive plant species Ageratina adenophora

Multiple factors relating to the rapid expansion of an invas...

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第三届全国生物入侵大会

作者： rui wang~1,yin-zheng wang~2,fang-hao wan~1 1.state key laboratory for biology of plant diseases and insect pests,institute of plant protection, chinese academy of agricultural sciences,beijing,100094,china 2.state key laboratory of systematic and evolutionary botany,institute of botany,chinese academy of sciences,beijing,100093,china

Many ecological and social factors have influenced the rapid invasion and spread of Ageratina. adenophora into the eastern Himalayas,with its heterogeneous natural environment.We focused on how diverse biological traits may couple with spatiotemporally heterogeneous geography and ecology, and promote rapid invasion.Spatial and temporal distribution data were collected from literature and private and public collections.We mapped the spatial and temporal distribution of A.adenophora in the Hengduan Mountains,then used binary logistic regression to identify variables that contribute to its spread.Join-count statistics were used to analyze geographic patterns.Our analyses reveal that water, wind,elevation,and human activities significantly affect the distribution of A.adenophora along the Yalongjiang River,Jinshajiang-Yangtze River,Anninghe River,G108 national road and rail line. Invasion occurs in a compact or scattered manner depending on dispersal pathway and times. Biological traits favor dispersal by water and wind.Human activities along roads and rail lines facilitate invasion over high mountains and across river valleys,and provide scope for further natural dispersal.An unexpected and rare invasion event resulted from a great flood;this amplified the dispersal ability of this plant both from vegetative propagules and seed production.

关键词： Ageratina adenophora Invasion Dispersal Hengduan Mountains Yangtze River

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