Beyond temperature: The environmental constraints of high-mountain microrefugia

IF 6.3 1区 环境科学与生态学 Q1 ECOLOGY
Branislav Vrábel, Kryštof Chytrý, Dietmar Moser, Karl Hülber, Norbert Helm, Johannes Hausharter, Johannes Wessely, Andreas Kollert, Andreas Mayr, Harald Pauli, Moritz Fallgatter, William John Eden, Stefan Dullinger
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引用次数: 0

Abstract

超越温度:高山微避难所的环境约束
据推测,当气候变暖时,树木线以上景观的细尺度气候异质性可能使高山植物物种能够在附近的寒冷微避难所中生存。然而,温度并不是高山环境中物种分布的唯一驱动因素。其他驱动因素在多大程度上限制了高山植物物种潜在微避难所的适宜性尚未得到评价。我们评估了由于特定的温度或基质条件,维管植物组合是否发生在低于其最佳海拔的前哨。因此,我们通过广义不相似模型(GDM)将分布在5 km²以上树线地形上的824个物种组成样本与细尺度环境代理相结合,并使用该GDM预测研究景观中具有高海拔特征的物种组合的潜在低海拔发生。为了量化温度和土壤碳含量对这些低海拔植被前哨发生的相对影响,我们随后将这些预测结果与高海拔地区特征的低海拔温度和土壤条件插值图进行了比较。在GDM中,温度对物种组成的影响最大,其次是土壤碳含量。gdm预测,目前约33%的高山景观可能具有高海拔植被的低海拔前哨。然而,在这一大片区域中,约30%是低土壤碳含量的前哨站,主要是碎石和岩石表面,2.9%是低碳含量和低温的组合,只有0.1%是完全低温的前哨站。反之,约2.1%的景观表现出异常寒冷的温度,但没有预测到高海拔植被的低海拔前哨。合成。在目前的景观中,异常低海拔植物组合的潜在发生集中在具有特定土壤条件的地区。与海拔高度相比,气温异常寒冷的地点要少得多,而且其中很大一部分的土壤性质是目前许多高山植物群不太可能忍受的。因此,我们的研究结果表明,在变暖的世界中,冷微避难所对高山植物的拯救作用将是有限的,在评估微避难所的适宜性时,除了温度因素外,还应更多地关注土壤因素。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Ecology
Journal of Ecology 环境科学-生态学
CiteScore
10.90
自引率
5.50%
发文量
207
审稿时长
3.0 months
期刊介绍: Journal of Ecology publishes original research papers on all aspects of the ecology of plants (including algae), in both aquatic and terrestrial ecosystems. We do not publish papers concerned solely with cultivated plants and agricultural ecosystems. Studies of plant communities, populations or individual species are accepted, as well as studies of the interactions between plants and animals, fungi or bacteria, providing they focus on the ecology of the plants. We aim to bring important work using any ecological approach (including molecular techniques) to a wide international audience and therefore only publish papers with strong and ecological messages that advance our understanding of ecological principles.
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