Misión Biológica de Galicia (MBG-CSIC), Apdo. 28, 36080, Pontevedra, Galicia, Spain.
Department of Tropical Ecology, Autonomous University of Yucatan, Apartado Postal 4-116, 97000, Itzimna, Mérida, Yucatan, Mexico.
Sci Rep. 2020 Sep 8;10(1):14757. doi: 10.1038/s41598-020-71782-5.
Research has shown that warming and drought change plant phenolics. However, much of this work has centered on the effects of individual abiotic stressors on single plant species rather than the concurrent effects of multiple stressors at the plant community level. To address this gap, we manipulated rainfall and air temperature to test for their individual and interactive effects on the expression of leaf phenolics at the community level for annual plant species occurring in two habitat types (under oak tree canopies or in open grasslands) in a Mediterranean savanna. We found that augmented temperature had a significant positive effect on the community-weighted mean of total phenolics whereas reduced rainfall had no effect. In addition, we found no evidence of interactive effects between climatic stressors and these patterns remained consistent across habitat types. Overall, this study points at increasing efforts to investigate the linkages between climate change and community-level shifts in plant secondary chemistry.
研究表明，气候变暖与干旱会改变植物的酚类物质。然而，这方面的大部分工作都集中在单一的非生物胁迫因素对单一植物物种的影响上，而不是在植物群落水平上同时考虑多种胁迫因素的影响。为了弥补这一空白，我们操纵降雨量和空气温度，以检验它们对发生在两个生境类型（在橡树树冠下或开阔的草原上）中的一年生植物物种的叶片酚类物质在群落水平上的表达的单独和交互作用。我们发现，增温对总酚类物质的群落加权平均值有显著的正向影响，而减少降雨量则没有影响。此外，我们没有发现气候胁迫因素之间存在相互作用的证据，而且这些模式在生境类型之间是一致的。总的来说，这项研究表明，需要加大力度研究气候变化与植物次生化学物质在群落水平上的变化之间的联系。
