资源脉冲对外来植物入侵影响的研究进展和展望

全球变化背景下, 诸如营养、水分等资源的波动是非稳态的, 往往以脉冲的形式出现, 呈现出频率低、强度高和持续时间短的特征。资源脉冲往往会打破植物群落固有的平衡状态, 进而影响全球变化的另一重要组分——外来植物入侵。目前, 全球变化对外来植物入侵影响的研究往往关注资源的稳态变化, 忽略了资源的波动性, 特别是脉冲的作用。该文通过综述资源脉冲对外来植物入侵影响的研究, 简要评述了资源脉冲的形成原因、类型及影响, 讨论了不同类型的资源脉冲对外来植物入侵的作用。此外, 该文根据现有的研究进展提出了一些未来可能的研究方向, 如资源脉冲的不同属性, 多种资源脉冲交互作用对植物入侵的影响及其机制等。

Research progress and prospect on the impacts of resource pulses on alien plant invasion

Under global change, the variations of resources such as nutrients and water are not stabilized and often occur in the form of pulses with low frequency, large amplitude, and short duration. The existing evidence suggests that resource pulses have the potential to disrupt the inherent equilibrium of plant communities, and thereby play a critical role in another important component of global change, plant invasion. To date, studies on the impacts of global change on plant invasion have mainly focused on the constant changes of resources, but have ignored the resource fluctuation, in particular the role of resource pulses. Here, we present a literature review concerning the effects of resource pulses on plant invasion, including causes, types and impacts of resource pulses. Then we discuss the importance of resource pulses in plant invasion. Furthermore, our review puts forward some fields that are worthy to be paid more attention in the future, such as the importance of attributes and types of resource pulses, their interactive impacts on and potential mechanisms in plant invasion.