Journal
SOIL BIOLOGY & BIOCHEMISTRY
Volume 168, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.soilbio.2022.108650
Keywords
Experimental drought; Soil organic carbon; Functional genes; Captured metagenomics
Categories
Funding
- Swedish Research Council for Sustainable Development (Formas) [2016-01924]
- German Research Foundation (DFG)
- Ministry of Economy and Competitiveness (MINECO)
- Estonian Research Council (ETAG)
- Swiss National Science Foundation (SNSF)
- Swedish National Infrastructure for Computing (SNIC) at UPPMAX [SNIC 2020/16-178, SNIC 2019/8-47]
- Swedish Research Council [2018-05973]
- Formas [2016-01924] Funding Source: Formas
- Vinnova [2016-01924] Funding Source: Vinnova
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Agricultural intensification and extreme weather events can stress soil microorganisms and their functions by affecting soil organic matter degradation. Understanding microbial functional gene diversity can connect microbial communities to ecosystem functions. An agricultural experiment across Europe showed differences in functional gene diversity among regions and responses to factors like organic carbon and water content.
Agricultural intensification and extreme weather events can represent considerable stress to soil microorganisms and their functions by influencing the key players behind the degradation of soil organic matter. A better understanding of the diversity and abundance of microbial functional genes that predict the functional potential of soils, can link the microbial communities to their key ecosystem functions. As there are still gaps in understanding how the functional genetic diversity behind microbial extracellular enzymes is influenced by events like drought and soil carbon management, an agricultural experiment over a range of different climatic conditions and soil properties was set-up across Europe. In Sweden, Germany and Spain, fields with varying levels of soil organic carbon were subjected to a short-term experimental drought. The diversity and composition of genes encoding for carbohydrate-related extracellular enzymes were determined using a 'captured metagenomics' technique. Functional gene diversity differed among the European regions and to a range of soil factors such as organic carbon and water content. The functional and taxonomic gene composition significantly differed between the climatic regions, while an effect of short-term drought was only observed in Germany. The results indicate that some soil microbial communities and their functional genes displayed a certain degree of resistance. The results suggest that soil microbial communities respond differently to short-term drought mainly due to regional adaptations to already dry environments and differences in their soil physicochemical properties.
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