Comparative performance of the highly invasive Mimosa invisa and its less invasive subspecies under different nutrient and light conditions
文献类型： 外文期刊
作者： Wang, Y. 1 ; Fan, Z. W. 1 ; Shen, Y. D. 1 ; Li, X. X. 1 ; Liu, Y. 1 ; Huang, Q. Q. 1 ;
作者机构： 1.Chinese Acad Trop Agr Sci, Minist Agr & Rural Affairs, Environm & Plant Protect Inst, Key Lab Integrated Pest Management Trop Crops, Haikou, Hainan, Peoples R China
关键词： competition; nutrient addition; phenotypic plasticity; plant invasion; shading
期刊名称：WEED RESEARCH （ 影响因子：2.424； 五年影响因子：2.533 ）
ISSN： 0043-1737
年卷期：
页码：
收录情况： SCI
摘要： Invasive plants may be more plastic than non-invasive plants and maintain high fitness under various environmental conditions. Previous studies mainly focused on the comparisons between invasive and native plants, and comparisons between highly invasive and less invasive exotic species are still relatively rare, especially for comparisons at the subspecies level. This study examined the effects of nutrient addition and shading on the performance of the highly invasive Mimosa invisa and its less invasive subspecies M. invisa var. inermis under either isolated or competitive conditions. Nutrient addition increased biomass and plant height and decreased root-to-shoot ratio (R/S). Shading decreased biomass and R/S and increased plant height. Under isolated conditions, the two invaders did not differ in R/S, plant height and plasticity of these traits in response to nutrient addition or shading, and the two invaders also did not differ in biomass production under each of the nutrient and light treatments. When the two invaders competed with each other, M. invisa outcompeted M. invisa var. inermis under high soil nutrient conditions, and the two invaders did not differ in performance under other growth conditions. Thus, only considering competition may we find out the difference between highly invasive species and their closely related, less invasive subspecies. Management of M. invisa should focus on habitats with high soil nutrient availability, in which M. invisa is more likely to dominate.
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