Soil nitrogen regulates root carbon secretion in the context of global change: A global meta-analysis

IF 4.6 1区环境科学与生态学 Q1 ECOLOGY

Functional Ecology Pub Date : 2024-08-02 DOI:10.1111/1365-2435.14626

Jia Zeng, Xiangyang Li, Liheng Xing, Ling Chen, Yu Li, Xing Wang, Qi Zhang, Gang Yang, Chengjie Ren, Gaihe Yang, Xinhui Han

引用次数: 0

Abstract

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全球变化背景下土壤氮对根系碳分泌的调节作用：全球荟萃分析

根系渗出物的分泌在土壤碳循环过程中起着至关重要的调节作用。它还受到全球变化因子（GCFs）的显著影响，但这些变化的一般模式尚未得到充分探讨，这极大地限制了全球变化背景下碳循环模型的准确建立。为此，我们进行了一项荟萃分析，纳入了 1926 对数据，以研究全球变化对根系渗出物的影响。此外，我们还利用阿凯克信息准则（AIC）进行了多模型推断，以评估年平均温度（AAT）、生态系统类型、处理强度、持续时间等多种因素的相对重要性。研究结果表明，GCFs 普遍提高了根部渗出物的产量。虽然氮的添加及其与温度升高的相互作用显著降低了根部碳分泌的速度，但所有其他因素都显著促进了根部碳分泌的速度。有趣的是，随着升温强度的增加，升温引起的根系碳分泌速率呈下降趋势，临界值为 3.6°C。此外，研究还发现 GCFs 对根系碳分泌的影响受土壤氮的调节，这证实了根圈养分在这一过程中的重要性。这些结果突出了根渗出物中 GCFs 的重要性，并强调了土壤全氮在调节根碳分泌过程中的关键作用。它们还为开发更精确的全球变化碳循环模型提供了宝贵的科学参数。在期刊博客上免费阅读本文的通俗摘要。

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来源期刊

Functional Ecology 环境科学-生态学

CiteScore

9.00

自引率

1.90%

发文量

243

审稿时长

4 months

期刊介绍： Functional Ecology publishes high-impact papers that enable a mechanistic understanding of ecological pattern and process from the organismic to the ecosystem scale. Because of the multifaceted nature of this challenge, papers can be based on a wide range of approaches. Thus, manuscripts may vary from physiological, genetics, life-history, and behavioural perspectives for organismal studies to community and biogeochemical studies when the goal is to understand ecosystem and larger scale ecological phenomena. We believe that the diverse nature of our journal is a strength, not a weakness, and we are open-minded about the variety of data, research approaches and types of studies that we publish. Certain key areas will continue to be emphasized: studies that integrate genomics with ecology, studies that examine how key aspects of physiology (e.g., stress) impact the ecology of animals and plants, or vice versa, and how evolution shapes interactions among function and ecological traits. Ecology has increasingly moved towards the realization that organismal traits and activities are vital for understanding community dynamics and ecosystem processes, particularly in response to the rapid global changes occurring in earth’s environment, and Functional Ecology aims to publish such integrative papers.