外来植物入侵对生态系统生产力的影响研究综述

外来植物入侵已成为全球尺度生态系统面临的一个主要环境问题。分析和总结了外来植物入侵对于生态系统生物量、生产力和碳固定的影响以及主要的影响因素,多数研究结果显示外来植物入侵会增加生态系统生物量和生产力,并进而增加生态系统对于二氧化碳气体的固定,但也有些研究结果得出相反的结论;另外,造成增加或减少结果的成因也是复杂的。系统全面地研究外来植物入侵,特别是考虑到空间上异质性和入侵的时间尺度,在研究外来植物入侵对生态系统生物量、生产力以及碳固定的影响方面尤为重要。

Reviews on the impacts of invasive plant on ecosystem productivity

Invasive plant is one of the most important ecological problems at global level. Invasive plant has significant impacts on the ecosystem biomass, productivity and carbon fixation. We reviewed and analyzed the impacts of invasive plant on such ecological parameters. while most studies showed that exotic plant invasion would increase ecosystem biomass and productivy, some studies indicated adverse conclusions. The reasons causing the increase and decrease of bioamass and productivity were complicated. In the future, systematic and comprehensive studies on invasive plant are necessary, and the spatial heterogeneity and temporal scale would be paid more attention to this research.