Middle-Eastern plant communities tolerate 9 years of drought in a multi-site climate manipulation experiment.
Middle-Eastern plant communities tolerate 9 years of drought in a multi-site climate manipulation experiment.
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DOI：
10.1038/ncomms6102
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发表时间：
2014-10-06
影响因子：
16.6
通讯作者：
Sternberg, Marcelo
中科院分区：
文献类型：
--
作者：
Tielboerger, Katja;Bilton, Mark C.;Metz, Johannes;Kigel, Jaime;Holzapfel, Claus;Lebrija-Trejos, Edwin;Konsens, Irit;Parag, Hadas A.;Sternberg, Marcelo
为了评估气候变化对生物多样性的影响，迫切需要进行广泛的实验来补充流行的非机械模型，这些模型将未来的生态系统特性映射到当前的气候生态位。在这里，我们通过一种新颖的多站点方法对这些模型的主要预测进行实验测试。我们对位于全球生物多样性热点地区陡峭气候梯度的旱地植物群落实施降雨控制（灌溉和干旱），其中包含许多野生作物祖先。尽管我们的研究范围很大，涵盖九个植物世代和许多物种，但在植被响应变量（生物量、物种组成、物种丰富度和密度）方面观察到处理之间的差异很小。缺乏明确的干旱影响对将旱地生态系统归类为最容易受到全球变化影响的研究提出了挑战。我们将这种阻力归因于植物进化过程中巨大的时间和空间异质性，并得出结论，在预测未来生物多样性变化时应考虑到这一点。 预计半干旱和地中海生态系统很容易受到气候变化的影响。在这里，Tielbörger 等人。研究表明，在多年的降雨控制实验中，生物多样性热点地区陡峭气候梯度上的植物能够抵抗灌溉和干旱。
For evaluating climate change impacts on biodiversity, extensive experiments are urgently needed to complement popular non-mechanistic models which map future ecosystem properties onto their current climatic niche. Here, we experimentally test the main prediction of these models by means of a novel multi-site approach. We implement rainfall manipulations—irrigation and drought—to dryland plant communities situated along a steep climatic gradient in a global biodiversity hotspot containing many wild progenitors of crops. Despite the large extent of our study, spanning nine plant generations and many species, very few differences between treatments were observed in the vegetation response variables: biomass, species composition, species richness and density. The lack of a clear drought effect challenges studies classifying dryland ecosystems as most vulnerable to global change. We attribute this resistance to the tremendous temporal and spatial heterogeneity under which the plants have evolved, concluding that this should be accounted for when predicting future biodiversity change. Semi-arid and Mediterranean ecosystems are predicted to be vulnerable to climate change. Here, Tielbörger et al. show that plants along a steep climatic gradient in a biodiversity hotspot are resistant to both irrigation and drought in multiple years of experimental rainfall manipulation.
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DOI：
10.1179/033443513x13753505864205
发表时间：
2013-11-01
影响因子：
0.8
作者：
Langgut, Dafna;Finkelstein, Israel;Litt, Thomas
通讯作者：
Litt, Thomas
影响因子：
56.9
作者：
Knapp, AK;Smith, MD
通讯作者：
Smith, MD
影响因子：
5.5
作者：
Evans, Sarah E.;Byrne, Kerry M.;Burke, Ingrid C.
通讯作者：
Burke, Ingrid C.
影响因子：
5.5
作者：
Metz, Johannes;Liancourt, Pierre;Tielboerger, Katja
通讯作者：
Tielboerger, Katja
影响因子：
64.8
作者：
Loarie, Scott R.;Duffy, Philip B.;Ackerly, David D.
通讯作者：
Ackerly, David D.