Plant community composition and traits modulate the impacts of drought intensity on soil microbial community composition and function

IF 9.8 1区 农林科学 Q1 SOIL SCIENCE Soil Biology & Biochemistry Pub Date : 2024-11-02 DOI:10.1016/j.soilbio.2024.109644
Natalie J. Oram , Fiona Brennan , Nadine Praeg , Richard D. Bardgett , Paul Illmer , Johannes Ingrisch , Michael Bahn
{"title":"Plant community composition and traits modulate the impacts of drought intensity on soil microbial community composition and function","authors":"Natalie J. Oram ,&nbsp;Fiona Brennan ,&nbsp;Nadine Praeg ,&nbsp;Richard D. Bardgett ,&nbsp;Paul Illmer ,&nbsp;Johannes Ingrisch ,&nbsp;Michael Bahn","doi":"10.1016/j.soilbio.2024.109644","DOIUrl":null,"url":null,"abstract":"<div><div>Terrestrial ecosystems are increasingly threatened by extreme drought events. Soil microbial communities are central to terrestrial ecosystem function via their role in regulating biogeochemical cycling. Consequently, the impact of increasingly intense drought events on soil microbial communities will have knock-on effects for how ecosystems cope with climate change. In an outdoor grassland mesocosm experiment, we determined how increasing drought intensity affects bacterial and fungal community composition, and functioning, during and after drought. We also tested whether plant community resource acquisition strategy (fast-versus slow-strategy plant communities), plant community composition, and plant functional traits mediate soil microbial responses to increasing drought intensity. We found that increasing drought intensity markedly shifted bacterial and fungal community composition, and these effects persisted until the end of the experiment (two months after re-wetting). Bacterial and fungal communities that experienced severe droughts did not return to baseline composition, while those that experienced a mild drought did. Microbial community functioning (potential extracellular enzyme activity) was reduced at peak drought and shortly after re-wetting. While drought intensity effects on bacterial or fungal communities were insensitive to plant community resource acquisition strategy, functional group abundance (aboveground biomass of grass or forb plant species) composition (grass:forb ratio) and leaf traits (leaf dry matter content and leaf nitrogen concentration) explained significant variation in bacterial and fungal community composition during and after drought. Notably, plant community leaf dry matter content and soil nitrogen were the key factors mediating the effect of increasing drought intensity on microbial indicator taxa (ASVs). We conclude that increasing drought intensity affects grassland soil microbial communities during and after drought, and this impact is influenced by plant community composition and functional traits.</div></div>","PeriodicalId":21888,"journal":{"name":"Soil Biology & Biochemistry","volume":"200 ","pages":"Article 109644"},"PeriodicalIF":9.8000,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Soil Biology & Biochemistry","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S003807172400333X","RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"SOIL SCIENCE","Score":null,"Total":0}
引用次数: 0

Abstract

Terrestrial ecosystems are increasingly threatened by extreme drought events. Soil microbial communities are central to terrestrial ecosystem function via their role in regulating biogeochemical cycling. Consequently, the impact of increasingly intense drought events on soil microbial communities will have knock-on effects for how ecosystems cope with climate change. In an outdoor grassland mesocosm experiment, we determined how increasing drought intensity affects bacterial and fungal community composition, and functioning, during and after drought. We also tested whether plant community resource acquisition strategy (fast-versus slow-strategy plant communities), plant community composition, and plant functional traits mediate soil microbial responses to increasing drought intensity. We found that increasing drought intensity markedly shifted bacterial and fungal community composition, and these effects persisted until the end of the experiment (two months after re-wetting). Bacterial and fungal communities that experienced severe droughts did not return to baseline composition, while those that experienced a mild drought did. Microbial community functioning (potential extracellular enzyme activity) was reduced at peak drought and shortly after re-wetting. While drought intensity effects on bacterial or fungal communities were insensitive to plant community resource acquisition strategy, functional group abundance (aboveground biomass of grass or forb plant species) composition (grass:forb ratio) and leaf traits (leaf dry matter content and leaf nitrogen concentration) explained significant variation in bacterial and fungal community composition during and after drought. Notably, plant community leaf dry matter content and soil nitrogen were the key factors mediating the effect of increasing drought intensity on microbial indicator taxa (ASVs). We conclude that increasing drought intensity affects grassland soil microbial communities during and after drought, and this impact is influenced by plant community composition and functional traits.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
植物群落组成和性状调节干旱强度对土壤微生物群落组成和功能的影响
陆地生态系统正日益受到极端干旱事件的威胁。土壤微生物群落在调节生物地球化学循环方面发挥着重要作用,是陆地生态系统功能的核心。因此,日益严重的干旱事件对土壤微生物群落的影响将对生态系统如何应对气候变化产生连锁反应。在室外草地中观实验中,我们确定了干旱强度的增加如何影响干旱期间和干旱后细菌和真菌群落的组成和功能。我们还测试了植物群落资源获取策略(快速策略植物群落与慢速策略植物群落)、植物群落组成和植物功能特征是否介导了土壤微生物对干旱强度增加的反应。我们发现,干旱强度的增加明显改变了细菌和真菌群落的组成,这些影响一直持续到实验结束(复湿后两个月)。经历过严重干旱的细菌和真菌群落没有恢复到基线组成,而经历过轻度干旱的群落则恢复到了基线组成。在干旱高峰期和复湿后不久,微生物群落的功能(潜在的胞外酶活性)都有所降低。虽然干旱强度对细菌或真菌群落的影响对植物群落资源获取策略不敏感,但功能群丰度(禾本科或草本植物物种的地上生物量)组成(禾本科与草本植物的比例)和叶片特征(叶片干物质含量和叶片氮浓度)解释了干旱期间和干旱后细菌和真菌群落组成的显著变化。值得注意的是,植物群落叶片干物质含量和土壤氮是介导干旱强度增加对微生物指示类群(ASVs)影响的关键因素。我们的结论是,干旱强度的增加会在干旱期间和之后影响草地土壤微生物群落,而这种影响受到植物群落组成和功能特征的影响。
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 去求助
来源期刊
Soil Biology & Biochemistry
Soil Biology & Biochemistry 农林科学-土壤科学
CiteScore
16.90
自引率
9.30%
发文量
312
审稿时长
49 days
期刊介绍: Soil Biology & Biochemistry publishes original research articles of international significance focusing on biological processes in soil and their applications to soil and environmental quality. Major topics include the ecology and biochemical processes of soil organisms, their effects on the environment, and interactions with plants. The journal also welcomes state-of-the-art reviews and discussions on contemporary research in soil biology and biochemistry.
期刊最新文献
Hyphosphere core taxa link plant-arbuscular mycorrhizal fungi combinations to soil organic phosphorus mineralization Contributions of microbial necromass and plant lignin to soil organic carbon stock in a paddy field under simulated conditions of long-term elevated CO2 and warming Tree species-dependent effects of urbanization and plant invasion on deadwood biota and decomposition rates Virome responses to heating of a forest soil suggest that most dsDNA viral particles do not persist at 90°C Simulated erosion of A horizon influences the dissolved organic matter chemodiversity and carbon sequestration of B horizon in Mollisols
×
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
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 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 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1