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北极森林转化为农业系统:沿着土地转化时间序列的土壤微生物反应

Paul Benalcazar¹, Brent Seuradge², Amanda C Diochon³

¹Faculty of Natural Resources Management, Lakehead University, Thunder Bay, ON, Canada.

Environmental microbiome

|May 11, 2024

概括

森林转化为农业后,北极土壤微生物群落迅速转变,碳和循环在第一个十年内发生显著变化,并在50年内稳定下来. 这种理解有助于温暖地区的可持续农业发展.

科学领域:

土壤科学土壤科学
微生物学微生物学
生态生态学生态生态学

背景情况:

北极地区面临着快速变暖,超过全球平均水平,创造了农业扩张的机会.
森林转化为农业影响土壤微生物群落和生物地球化学循环.
可持续发展需要了解这些生物变化,特别是碳 (C) 和 (N) 损失.

研究的目的:

在森林转化为农业后,量化土壤微生物群落和功能的变化.
在三个不同的时间间隔评估变化:<10年,10-50年,>50年转换后.
为新兴的北极农业系统提供可持续管理实践的信息.

主要方法:

加拿大南部北极地区森林相邻的农业田地对着森林.
定量PCR (qPCR) 用于评估C,N和 (P) 循环中的功能基因.
安普利康测序用于分析微生物的分类学多样性和社区结构.

主要成果:

微生物群落在第一个十年内迅速转变 (真菌:从Basidiomycota变成Ascomycota;细菌:多样性增加,Gemmatimonadota增加,Actinomycetota减少).
化和低分子量C循环的功能基因增加;有机P矿化潜力下降.
N循环功能在十年内稳定,而C循环功能在转换后的50年内继续发生变化.

结论:

土壤微生物群落经历了快速的初始转变,随后是较慢的过渡,在转化后大约50年稳定下来.
了解这些微生物动态对于预测C和N损失至关重要.
这些知识支持在北极农业系统中的可持续土壤管理,适用于当地和全球的环境.

关键词:

安普利康测序的测序方法生物地质化学循环过程气候变化气候变化气候变化功能性基因是指功能性的基因.北方的农业扩张.土壤微生物群

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