Environmental Drivers and Spatial-Temporal Estimation of Precipitation Change Effects on Soil Respiration at the Global Scale

IF 5.5 2区 地球科学 Q1 ENVIRONMENTAL SCIENCES
Yifan Wu, Xiaobo Li, Xiaoyang Li, Chen Huang, Eli Argaman, Jun Liu, Yan Xiao
{"title":"Environmental Drivers and Spatial-Temporal Estimation of Precipitation Change Effects on Soil Respiration at the Global Scale","authors":"Yifan Wu,&nbsp;Xiaobo Li,&nbsp;Xiaoyang Li,&nbsp;Chen Huang,&nbsp;Eli Argaman,&nbsp;Jun Liu,&nbsp;Yan Xiao","doi":"10.1029/2024GB008415","DOIUrl":null,"url":null,"abstract":"<p>Soil respiration (Rs) is defined as the emission of carbon dioxide from soil into the atmosphere, which represents a critical carbon flux within terrestrial ecosystems. Precipitation change significantly influences Rs, generating feedback mechanisms pertinent to global climate change. Nevertheless, the global distribution and environmental determinants of precipitation's effects on Rs remain uncertain. We compiled a database encompassing 570 Rs observations from field experiments that manipulated precipitation, derived from 221 published studies. Utilizing this comprehensive data set, we conducted a meta-analysis to elucidate Rs responses to precipitation alterations. Subsequently, we employed a machine learning approach to provide a globally spatially explicit quantification of precipitation change effects on Rs under future climate scenarios. Our findings revealed that increased experimental precipitation markedly enhances Rs, while decreased precipitation inhibits it. Furthermore, Rs responses to precipitation change exhibited variability across ecosystems and climatic regions. This study also confirmed that the Rs responses vary based on the intensity and duration of precipitation change, with short-term or heavy precipitation fluctuations exerting the strongest effects. Environmental conditions influenced the reaction of Rs to precipitation change, as factors such as soil type, vegetation, and climate worked together to mediate spatial differences. Projections based on bioclimatic predictors suggest that future climate scenarios significantly amplify Rs responses to precipitation change, potentially increasing uncertainties in greenhouse gas emissions estimates. Overall, our analysis emphasizes the significance of context dependencies and offers a spatially explicit assessment of precipitation change impacts on Rs on a global level, providing a comprehensive reference for comprehending ecosystem carbon dynamics.</p>","PeriodicalId":12729,"journal":{"name":"Global Biogeochemical Cycles","volume":"39 8","pages":""},"PeriodicalIF":5.5000,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Global Biogeochemical Cycles","FirstCategoryId":"89","ListUrlMain":"https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024GB008415","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0

Abstract

Soil respiration (Rs) is defined as the emission of carbon dioxide from soil into the atmosphere, which represents a critical carbon flux within terrestrial ecosystems. Precipitation change significantly influences Rs, generating feedback mechanisms pertinent to global climate change. Nevertheless, the global distribution and environmental determinants of precipitation's effects on Rs remain uncertain. We compiled a database encompassing 570 Rs observations from field experiments that manipulated precipitation, derived from 221 published studies. Utilizing this comprehensive data set, we conducted a meta-analysis to elucidate Rs responses to precipitation alterations. Subsequently, we employed a machine learning approach to provide a globally spatially explicit quantification of precipitation change effects on Rs under future climate scenarios. Our findings revealed that increased experimental precipitation markedly enhances Rs, while decreased precipitation inhibits it. Furthermore, Rs responses to precipitation change exhibited variability across ecosystems and climatic regions. This study also confirmed that the Rs responses vary based on the intensity and duration of precipitation change, with short-term or heavy precipitation fluctuations exerting the strongest effects. Environmental conditions influenced the reaction of Rs to precipitation change, as factors such as soil type, vegetation, and climate worked together to mediate spatial differences. Projections based on bioclimatic predictors suggest that future climate scenarios significantly amplify Rs responses to precipitation change, potentially increasing uncertainties in greenhouse gas emissions estimates. Overall, our analysis emphasizes the significance of context dependencies and offers a spatially explicit assessment of precipitation change impacts on Rs on a global level, providing a comprehensive reference for comprehending ecosystem carbon dynamics.

Abstract Image

Abstract Image

全球尺度下降水变化对土壤呼吸影响的环境驱动因素及时空估算
土壤呼吸(Rs)被定义为二氧化碳从土壤排放到大气中,这代表了陆地生态系统内的一个关键碳通量。降水变化显著影响Rs,产生与全球气候变化相关的反馈机制。然而,降水对Rs影响的全球分布和环境决定因素仍然不确定。我们编制了一个数据库,其中包括来自221项已发表研究的570 Rs观测数据,这些观测数据来自操纵降水的野外实验。利用这一综合数据集,我们进行了meta分析,以阐明Rs对降水变化的响应。随后,我们采用机器学习方法提供了未来气候情景下降水变化对Rs影响的全球空间明确量化。结果表明,增加的实验降水显著增强Rs,而减少的降水则抑制Rs。此外,Rs对降水变化的响应表现出不同生态系统和气候区域的变异性。研究还证实,Rs响应随降水变化的强度和持续时间而变化,短期或强降水波动的影响最强。环境条件影响Rs对降水变化的响应,土壤类型、植被和气候等因素共同调节了空间差异。基于生物气候预测器的预估表明,未来气候情景显著放大Rs对降水变化的响应,可能增加温室气体排放估算的不确定性。总体而言,我们的分析强调了环境依赖关系的重要性,并提供了全球水平上降水变化对Rs影响的空间明确评估,为理解生态系统碳动态提供了综合参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Global Biogeochemical Cycles
Global Biogeochemical Cycles 环境科学-地球科学综合
CiteScore
8.90
自引率
7.70%
发文量
141
审稿时长
8-16 weeks
期刊介绍: Global Biogeochemical Cycles (GBC) features research on regional to global biogeochemical interactions, as well as more local studies that demonstrate fundamental implications for biogeochemical processing at regional or global scales. Published papers draw on a wide array of methods and knowledge and extend in time from the deep geologic past to recent historical and potential future interactions. This broad scope includes studies that elucidate human activities as interactive components of biogeochemical cycles and physical Earth Systems including climate. Authors are required to make their work accessible to a broad interdisciplinary range of scientists.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信