Non-climatic constraints on upper elevational plant range expansion under climate change
Non-climatic constraints on upper elevational plant range expansion under climate change
复制标题
DOI：
10.1098/rspb.2014.1779
复制
发表时间：
2014-11-07
影响因子：
4.7
通讯作者：
Vellend, Mark
中科院分区：
文献类型：
--
作者：
Brown, Carissa D.;Vellend, Mark
由于我们对非气候因素如何有助于确定沿着垂直气候梯度的范围限制的理解不足，我们预测气候变化引起的范围变化的能力有限。在这里，我们提出了一个独特的组合的观察和实验表明，种子捕食和土壤特性强烈限制再生超出海拔范围上限的糖枫，树种的主要经济重要性。最引人注目的是，超出范围限制的再生几乎完全发生在实验保护种子免受捕食者侵害的情况下。从种子再生抑制土壤从超出范围的边缘时，这种土壤被移植到网站的范围内，间接证据表明，真菌病原体发挥作用。在试图预测气候变化的生物后果时，显然需要认真注意非气候因素。至少，我们可以预期非气候因素会在创造更有利的气候条件和范围扩大之间产生相当长的时间滞后。
We are limited in our ability to predict climate-change-induced range shifts by our inadequate understanding of how non-climatic factors contribute to determining range limits along putatively climatic gradients. Here, we present a unique combination of observations and experiments demonstrating that seed predation and soil properties strongly limit regeneration beyond the upper elevational range limit of sugar maple, a tree species of major economic importance. Most strikingly, regeneration beyond the range limit occurred almost exclusively when seeds were experimentally protected from predators. Regeneration from seed was depressed on soil from beyond the range edge when this soil was transplanted to sites within the range, with indirect evidence suggesting that fungal pathogens play a role. Non-climatic factors are clearly in need of careful attention when attempting to predict the biotic consequences of climate change. At minimum, we can expect non-climatic factors to create substantial time lags between the creation of more favourable climatic conditions and range expansion.