Phenotypic plasticity mediates climate change responses among invasive and indigenous arthropods
Phenotypic plasticity mediates climate change responses among invasive and indigenous arthropods
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DOI：
10.1098/rspb.2007.0772
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发表时间：
2007-10-22
影响因子：
4.7
通讯作者：
Leinaas, Hans Petter
中科院分区：
文献类型：
--
作者：
Chown, Steven L.;Slabber, Sarette;Leinaas, Hans Petter
全球变化与生物入侵之间的协同作用已被确定为对全球生物多样性和人类福祉的主要潜在威胁。许多温带陆地生态系统的全球变化型干旱特征尤其重要，因为它显然有利于入侵物种而不是本地物种，增加了保护的负担并损害了生态系统服务的提供。然而，这种协同作用的性质和机制仍未得到充分探讨。本研究表明，在温带陆地生态系统中，入侵和本地春尾物种的表型可塑性不同，温暖的环境促进了入侵物种的干燥生存，而减少了本地物种的干燥生存。在模拟气候变化趋势的野外实验中，这些差异与本地物种密度的显著下降和入侵物种密度的微小变化是一致的。我们认为，与其说是表型可塑性的程度区分了这些入侵物种和本土物种对气候变化的反应，不如说是这种可塑性的形式。尽管如此，这种不同的生理反应支持了这样一种观点，即在经历全球变化型干旱的温带陆地系统中，入侵物种可能相对于本土物种具有优势。
Synergies between global change and biological invasion have been identified as a major potential threat to global biodiversity and human welfare. The global change-type drought characteristic of many temperate terrestrial ecosystems is especially significant because it will apparently favour invasive over indigenous species, adding to the burden of conservation and compromising ecosystem service delivery. However, the nature of and mechanisms underlying this synergy remain poorly explored. Here we show that in a temperate terrestrial ecosystem, invasive and indigenous springtail species differ in the form of their phenotypic plasticity such that warmer conditions promote survival of desiccation in the invasive species and reduce it in the indigenous ones. These differences are consistent with significant declines in the densities of indigenous species and little change in those of invasive species in a manipulative field experiment that mimicked climate change trends. We suggest that it is not so much the extent of phenotypic plasticity that distinguishes climate change responses among these invasive and indigenous species, as the form that this plasticity takes. Nonetheless, this differential physiological response provides support for the idea that in temperate terrestrial systems experiencing global change-type drought, invasive species may well be at an advantage relative to their indigenous counterparts.