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仙树 (Cenchrus spinifex) 的入侵改变了沙草原生态系统中的土壤微生物社区结构

Baihui Ren¹, Meng Meng¹, Jianxin Yu¹

¹Shenyang Agricultural University, Shenyang, Liaoning, 110866, China.

|November 3, 2023

概括

仙草虫 (Cenchrus spinifex) 的入侵改变了沙草原中的土壤循环和微生物群落. 它的影响因生长阶段而异,影响土壤的偏好和微生物网络的稳定性.

科学领域:

生态生态学生态生态学
土壤科学土壤科学
微生物学微生物学

背景情况:

持续的沉积对陆地生态系统和土壤循环产生影响.
侵入性植物,如Cenchrus spinifex,可以改变土壤微生物群落和转化,帮助他们的入侵.
了解Cenchrus spinifex在其成长阶段对土壤环境和微生物群落的影响至关重要.

研究的目的:

调查Cenchrus spinifex入侵对土壤环境,微生物群落结构和沙草原多样性的影响.
分析植被和生殖生长期间的变化.
确定影响土壤循环变化的关键因素.

主要方法:

在Cenchrus spinifex的植被和繁殖生长期间,从四个入侵度息地收集的土壤样本.
用于分析土壤微生物群落的高通量测序和定量PCR (qPCR).
对土壤环境因素的分析,包括含量,和有机碳.

主要成果:

Cenchrus spinifex的入侵对土壤环境和利用 (在植被生长过程中更喜欢氨) 有不同的影响.
观察到土壤细菌群体组成和结构的显著变化;细菌和真菌群体的反应不一致.
细菌微生物网络表现出比真菌网络更大的稳定性. 关键的循环微生物群落受到影响, nifH 和 AOA-amoA 丰度增加,但 AOA-amoB 减少.
性水解,总和总等土壤特性在植被生长期间影响了微生物群落,而性水解,总和有机碳在生殖生长期间是关键.

结论:

Cenchrus spinifex的入侵显著重塑了沙草原中的土壤微生物群落和循环过程.
侵袭的影响取决于植物的生长阶段,并由特定的土壤物理化学性质介导.
了解这些动态对于管理入侵物种和维持生态系统功能至关重要.

关键词:

树棘虫的入侵树棘虫的入侵环境因素环境因素功能性基因是指功能性的基因.土壤微生物群落土壤微生物群落土壤气循环是土壤的气循环.

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