气候变化领域集成服务门户(CCPortal): Conversion of boreal forests to agricultural systems: soil microbial responses along a land-conversion chronosequence

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DOI	10.1186/s40793-024-00576-3
	Conversion of boreal forests to agricultural systems: soil microbial responses along a land-conversion chronosequence
	Benalcazar, Paul; Seuradge, Brent; Diochon, Amanda C.; Kolka, Randall K.; Phillips, Lori A.
发表日期	2024
EISSN	2524-6372
起始页码	19
结束页码	1
卷号	19 期号:1
英文摘要	Background Boreal regions are warming at more than double the global average, creating opportunities for the northward expansion of agriculture. Expanding agricultural production in these regions will involve the conversion of boreal forests to agricultural fields, with cumulative impacts on soil microbial communities and associated biogeochemical cycling processes. Understanding the magnitude or rate of change that will occur with these biological processes will provide information that will enable these regions to be developed in a more sustainable manner, including managing carbon and nitrogen losses. This study, based in the southern boreal region of Canada where agricultural expansion has been occurring for decades, used a paired forest-adjacent agricultural field approach to quantify how soil microbial communities and functions were altered at three different stages post-conversion (< 10, > 10 and < 50, and > 50 years). Soil microbial functional capacity was assessed by quantitative PCR of genes associated with carbon (C), nitrogen, and phosphorous (P) cycling; microbial taxonomic diversity and community structure was assessed by amplicon sequencing. Results Fungal alpha diversity did not change, but communities shifted from Basidiomycota to Ascomycota dominant within the first decade. Bacterial alpha diversity increased, with Gemmatimonadota groups generally increasing and Actinomycetota groups generally decreasing in agricultural soils. These altered communities led to altered functional capacity. Functional genes associated with nitrification and low molecular weight C cycling potential increased after conversion, while those associated with organic P mineralization potential decreased. Stable increases in most N cycling functions occurred within the first decade, but C cycling functions were still changing 50 years post conversion. Conclusions Microbial communities underwent a rapid shift in the first decade, followed by several decades of slower transition until stabilizing 50 years post conversion. Understanding how the microbial communities respond at different stages post-conversion improves our ability to predict C and N losses from emerging boreal agricultural systems, and provides insight into how best to manage these soils in a way that is sustainable at the local level and within a global context.
英文关键词	Climate change; Northern agricultural expansion; Soil microbiome; Biogeochemical cycling; Functional genes; Amplicon sequencing
语种	英语
WOS研究方向	Genetics & Heredity ; Microbiology
WOS类目	Genetics & Heredity ; Microbiology
WOS记录号	WOS:001220332200001
来源期刊	ENVIRONMENTAL MICROBIOME
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303867
作者单位	Lakehead University; Agriculture & Agri Food Canada; Lakehead University; United States Department of Agriculture (USDA); United States Forest Service
推荐引用方式 GB/T 7714	Benalcazar, Paul,Seuradge, Brent,Diochon, Amanda C.,et al. Conversion of boreal forests to agricultural systems: soil microbial responses along a land-conversion chronosequence[J],2024,19(1).
APA	Benalcazar, Paul,Seuradge, Brent,Diochon, Amanda C.,Kolka, Randall K.,&Phillips, Lori A..(2024).Conversion of boreal forests to agricultural systems: soil microbial responses along a land-conversion chronosequence.ENVIRONMENTAL MICROBIOME,19(1).
MLA	Benalcazar, Paul,et al."Conversion of boreal forests to agricultural systems: soil microbial responses along a land-conversion chronosequence".ENVIRONMENTAL MICROBIOME 19.1(2024).