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气候变化过了中国内蒙古温带草原的资源获取性植物

Heying Jing¹, Xingshuo Xiong¹, Feng Jiang¹

¹Institute of Ecology and Key Laboratory for Earth Surface Processes of the Ministry of Education, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China.

Science China. Life sciences

|August 22, 2023

概括

气候变化减少了物种丰富性和功能丰富性,特别是对资源采集型植物. 然而,由于有弹性,资源节约的物种,草原的生产率保持稳定.

科学领域:

生态生态学生态生态学
气候变化生物学气候变化生物学
植物的功能特征植物的功能特征

背景情况:

全球气候变化通过改变物种和功能多样性影响生态系统.
了解不同资源使用策略的物种如何应对气候变化对于预测生态系统功能至关重要.
植物经济特征定义了资源获取和保守策略,影响社区动态.

研究的目的:

研究气候变化对温带草原物种丰富度 (SR) 和功能丰富度 (FRic) 的影响.
分析SR和FRic的变化,特别是对于资源使用策略不同的物种,如何影响社区一级的生产力.
区分资源获取型,中型和资源节约型植物功能类型对气候变化的反应.

主要方法:

利用了来自内蒙古温带草原的长期观测数据 (1982-2017年).
根据四个叶子经济特征 (叶子C,N,P度,特定的叶子面积) 将81种植物种类分为三个功能类型 (资源获取型,中型,保守型).
分析了与气候变量和物种功能类型有关的社区级SR,FRic和生产率的变化.

主要成果:

随着越来越多的干燥气候趋势,社区一级的SR和FRic下降.
SR和FRic的下降主要是由于资源获取性物种的多样性减少而导致的.
社区一级的生产率保持稳定,因为在草原上占主导地位的资源节约性物种表现出对气候变化的弹性.

结论:

具有不同资源使用策略的物种对气候变化表现出不同的反应.
干燥的气候对物种和功能丰富性产生负面影响,特别是对收购性物种.
生态系统的功能,如生产力,可以保持稳定,尽管多样性丧失,如果保守的物种主导和有弹性.

关键词:

生物多样性生物多样性生态战略生态战略功能多样性的功能多样性.功能性特征功能性的特征.长期变化的长期变化.种类多样性物种的多样性.

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