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在干燥和放牧的世界里,植物表型的多样性是不可预见的

Nicolas Gross¹, Fernando T Maestre², Pierre Liancourt^3,4

¹Université Clermont Auvergne, INRAE, VetAgro Sup, Unité Mixte de Recherche Ecosystème Prairial, Clermont-Ferrand, France. nicolas.gross@inrae.fr.

|August 7, 2024

概括

干旱地区具有显著的植物表型多样性,干旱和放牧压力增加了特征多样性. 极端干旱和放牧环境显示出独特的植物适应性.

科学领域:

生态学
植物学
全球变化生物学

背景情况:

地球的植物表型多样性受到全球变化的威胁.
干旱和放牧对植物特征共变的影响尚不清楚.

研究的目的:

调查干旱和放牧压力如何影响全球干旱地区的植物特征共变.
了解干旱环境中的植物表型多样性的驱动因素.

主要方法:

分析了6个大陆326个多年生植物物种的133769个特征测量结果.
对20种化学和形态特征的评估,以应对干旱和放牧.
确定干旱度值及其与牧场压力的相互作用.

主要成果:

超过0.7的干旱度值可以增加88%的特征多样性.
牧场压力将这一门转移到较低的干旱水平.
极端干旱和被放牧的干旱地区包含57%的观察到的特征多样性.

结论:

干旱地区是植物表型多样性的重要储存地, 挑战了恶劣条件减少多样性的观念.
干旱和放牧压力相互作用形成干旱地区的植物特征多样性.
植物表现出不同的策略来应对气候变化和土地使用强化带来的环境压力.

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