Eppstein Margaret J, Molofsky Jane
Department of Computer Science, University of Vermont, Burlington, VT 05405, USA.
Ecol Lett. 2007 Apr;10(4):253-63. doi: 10.1111/j.1461-0248.2007.01017.x.
The detrimental effects of invasive plant species on ecosystems are well documented. While much research has focused on discovering ecological influences associated with invasiveness, it remains unclear how these influences interact, causing some introduced exotic species to become invasive threats. Here we develop a framework that incorporates the influences of propagule pressure, frequency independent growth rates, feedback relationships, resource competition and spatial scale of interactions. Our results show that these ecological influences interact in complex ways, resulting in expected outcomes ranging from inability to establish, to naturalization, to conditional invasion dependent on quantity and spatial distribution of propagules, to unconditional takeover. We propose a way to predict the likelihood of these four possible outcomes, for a species recently introduced into a given target community. Such information could enable conservation biologists to craft strategies and target remediation efforts more efficiently and effectively in order to help maintain biodiversity in ecological communities.
入侵植物物种对生态系统的有害影响已有充分记录。虽然许多研究集中于发现与入侵性相关的生态影响，但这些影响如何相互作用，导致一些外来引进物种成为入侵威胁仍不清楚。在此，我们建立了一个框架，纳入了繁殖体压力、频率独立生长速率、反馈关系、资源竞争和相互作用的空间尺度等影响因素。我们的结果表明，这些生态影响以复杂的方式相互作用，产生的预期结果范围从无法定殖、归化，到依赖繁殖体数量和空间分布的条件性入侵，再到无条件占据。我们提出了一种方法，来预测一个最近引入给定目标群落的物种出现这四种可能结果的可能性。这些信息可以使保护生物学家更高效、有效地制定策略并针对性地进行补救工作，以帮助维护生态群落中的生物多样性。
