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变暖加剧了除草对矿化潜力的负面影响

Zi Yang¹, Lihua Meng², Ziyang Liu²

¹Key Laboratory of Cell Activities and Stress Adaptations Ministry of Education, School of Life Sciences, Lanzhou University, Tianshui Road 222, Lanzhou, Gansu, People's Republic of China.

The Science of the total environment

|March 10, 2024

概括

气候变暖加剧了除草对土壤矿化造成的负面影响. 清除灌木会损害,特别是当与变暖相结合时,会影响土壤的健康.

科学领域:

生态生态学生态生态学
土壤科学土壤科学
生物地质化学生物地质化学

背景情况:

灌木影响土壤 (P) 循环通过根排泄物和P吸收.
气候变暖和灌木入侵可以改变有机P矿化.
温暖化和灌木移除对P矿物化的相互作用影响尚不清楚.

研究的目的:

研究气候变暖的影响,灌木除,以及它们对土壤有机矿化潜力的相互作用.
评估土壤P成分,微生物酸酶基因 (phoC,phoD) 和酶活动的变化.
了解微生物社区在调节P矿化中的作用.

主要方法:

在青海-西藏高原进行了操纵变暖和灌木移除的实地实验.
土壤有机酸盐矿化成分的量化 (总,有机,可用P).
实时PCR测量土壤微生物酸酶基因 (phoC,phoD) 和酶活动.

主要成果:

仅仅是变暖并没有显著影响土壤的P成分,基因或酶.
清除灌木对土壤P成分和酸酶基因产生了负面影响.
在变暖条件下,除除灌木显著降低了土壤有机酸盐矿化基因拷贝数.
变暖增加了真菌的丰富性,缓冲了灌木移除对细菌丰富性和基因拷贝数量的影响.
只有phoC基因拷贝数与可用的 (AP) 有显著的相关性.
结构方程建模表明了灌木移除及其与变暖的相互作用对负面影响的phoC副本数量.

结论:

气候变暖加剧了除草对土壤矿化潜力的负面影响.
清除灌木,特别是在变暖的情况下,降低了土壤对有机P矿物化的能力.
这些发现为了解灌木入侵对土壤P循环在气候变化下的影响提供了理论基础.

关键词:

现有的可以使用.青海-西藏高原是一个高原.土壤微生物社区在 phoC 基因基因.phoD基因基因 phoD 基因

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