北半球树木生长速度介导的抗旱与恢复之间的权衡。

IF 3.8 1区 生物学 Q1 BIOLOGY
Wenjing Tao, Jiang He, Nicholas G Smith, Hongjun Yang, Jinchun Liu, Lei Chen, Jianping Tao, Weixue Luo
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引用次数: 0

摘要

随着气候变暖,干旱事件的频率和严重程度都在增加。这对全球树木的生长和存活构成了重大威胁。然而,不同地理区域和物种的树木生长对干旱反应的内在机制仍无定论。在此,我们利用1951年至2020年32个物种的2808枚树环宽度年表,研究了北半球树木在应对干旱时的生长速度与抵抗力和恢复力之间的关系。我们发现,与生长速度慢的树木相比,生长速度快的树木表现出较低的抗旱性,但抗旱恢复能力较强,这进一步证实了抗旱性与恢复能力之间的权衡对叶片光合特性变化的响应。生长速率的差异也很好地解释了不同地理区域以及不同支系和演替阶段的物种在抗旱性和恢复能力方面的巨大差异。我们的研究为树木的生长速率调控抗旱性和恢复能力提供了一个确凿而统一的视角,揭示了北半球树木物种在应对干旱胁迫时所采用的不同策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Tree growth rate-mediated trade-off between drought resistance and recovery in the Northern Hemisphere.

The frequency and severity of drought events have increased with climate warming. This poses a significant threat to tree growth and survival worldwide. However, the underlying mechanism of tree growth responses to drought across diverse geographic regions and species remains inconclusive. Here, we used 2808 tree ring width chronologies of 32 species from 1951 to 2020 to examine the relationships between growth rates and resistance and recovery of trees in response to drought in the Northern Hemisphere. We found that trees with fast growth rates exhibited lower drought resistance but higher drought recovery compared to those with slow growth rates, which was further corroborated by the trade-off between resistance and recovery in response to variations in leaf photosynthetic traits. The difference in growth rates also well explained the large variability in the drought resistance and recovery for different geographic regions, as well as for species from different clades and successional stages. Our study provides a conclusive and uniform perspective that tree growth rate regulates drought resistance and recovery, shedding light on the diverse strategies employed by tree species in response to drought stress in the Northern Hemisphere.

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来源期刊
CiteScore
7.90
自引率
4.30%
发文量
502
审稿时长
1 months
期刊介绍: Proceedings B is the Royal Society’s flagship biological research journal, accepting original articles and reviews of outstanding scientific importance and broad general interest. The main criteria for acceptance are that a study is novel, and has general significance to biologists. Articles published cover a wide range of areas within the biological sciences, many have relevance to organisms and the environments in which they live. The scope includes, but is not limited to, ecology, evolution, behavior, health and disease epidemiology, neuroscience and cognition, behavioral genetics, development, biomechanics, paleontology, comparative biology, molecular ecology and evolution, and global change biology.
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