退化高寒草甸狼毒发生区土壤真菌多样性的空间变异

doi:10.13287/j.1001-9332.202001.039

应用生态学报 ›› 2020, Vol. 31 ›› Issue (1): 249-258.doi: 10.13287/j.1001-9332.202001.039

退化高寒草甸狼毒发生区土壤真菌多样性的空间变异

刘咏梅^1,2*, 赵樊¹, 何玮³, 王雷^1,2, 李京忠⁴, 刘建红^1,2

¹西北大学城市与环境学院, 西安 710127;
²陕西省地表系统与环境承载力重点实验室, 西安 710127;
³西北大学生命科学学院, 西安 710069;
⁴许昌学院城乡规划与园林学院, 河南许昌 461000

收稿日期:2019-09-06 出版日期:2020-01-15 发布日期:2020-01-15
通讯作者: E-mail: liuym@nwu.edu.cn
作者简介:刘咏梅, 女, 1970年生, 博士,副教授。主要从事草地生态遥感研究。E-mail: liuym@nwu.edu.cn
基金资助:
国家自然科学基金项目(41871335)

Spatial heterogeneity of soil fungal diversity in area with presence of Stellera chamaejasme on the degraded alpine meadow

LIU Yong-mei^1,2*, ZHAO Fan¹, HE Wei³, WANG Lei^1,2, LI Jing-zhong⁴, LIU Jian-hong^1,2

¹College of Urban and Environmental Science, Northwest University, Xi’an 710127, China;
²Shaanxi Key Laboratory of Surface System and Environmental Carrying Capacity, Xi’an 710127, China;
³College of Life Sciences, Northwest University, Xi’an 710069, China;
⁴School of Urban & Rural Planning and Landscape Architecture, Xuchang University, Xuchang 461000, Henan, China

Received:2019-09-06 Online:2020-01-15 Published:2020-01-15
Contact: E-mail: liuym@nwu.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (41871335).

摘要/Abstract

摘要： 狼毒是青藏高原危害最严重的毒草种类之一,其快速蔓延对高寒草甸生态系统的影响日益严重。选取祁连山中段退化高寒草甸为研究区,综合采用高通量测序技术、地统计学和GIS空间分析方法,分析狼毒发生区土壤真菌多样性的空间变异特征,研究狼毒群落与土壤真菌多样性的空间相关性。结果表明: 与非发生区相比,狼毒发生区土壤真菌群落物种丰富度下降而优势度显著增加,α多样性降低;土壤真菌群落物种构成差异增强,β多样性明显升高。狼毒入侵对土壤真菌多样性的空间格局有一定扰动,发生区各多样性指数的斑块破碎化程度增加,土壤真菌群落物种构成的空间异质性明显增强,α和β多样性的空间稳定性降低。狼毒盖度与土壤真菌α和β多样性指数呈现显著正相关及显著负相关的区域交错镶嵌分布,空间相关性规律不明显,表明狼毒入侵草甸土壤真菌多样性的空间变异可能受地上植被和土壤环境的共同作用。

Abstract: Stellera chamaejasme is one of the most serious weeds in Qinhai-Tibetan Plateau, the rapid expansion of which exerts an increasing effect on the alpine meadow ecosystem. With high-throughput sequencing technology, geostatistics and GIS method, the spatial heterogeneity of soil fungal diversity in Stellera occurrence area and the spatial correlation between Stellera coverage and soil fungal diversity were investigated in a typical degraded alpine meadow of the Qilian Mountain. Compared to no-Stellera area, the fungi richness in Stellera area decreased, the dominance increased, and the α-diversity reduced. The difference of fungal species composition enhanced and β-diversity significantly increased. The spatial pattern of soil fungal diversity was affected by the invasion of Stellera, resulting in higher fragmentation in occurrence area. Spatial heterogeneity of species composition increased remarkably, and spatial stability of α-diversity and β-diversity decreased. The portion of positive correlation and negative correlation interlaced, indicating no clear spatial correlation between Stellera coverage and soil fungal diversity. Our results indicate that the spatial pattern of soil fungal diversity was affected by the interaction of soil and vegetation in Stellera invaded meadows.

刘咏梅, 赵樊, 何玮, 王雷, 李京忠, 刘建红. 退化高寒草甸狼毒发生区土壤真菌多样性的空间变异[J]. 应用生态学报, 2020, 31(1): 249-258.

LIU Yong-mei, ZHAO Fan, HE Wei, WANG Lei, LI Jing-zhong, LIU Jian-hong. Spatial heterogeneity of soil fungal diversity in area with presence of Stellera chamaejasme on the degraded alpine meadow[J]. Chinese Journal of Applied Ecology, 2020, 31(1): 249-258.

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退化高寒草甸狼毒发生区土壤真菌多样性的空间变异

Spatial heterogeneity of soil fungal diversity in area with presence of Stellera chamaejasme on the degraded alpine meadow

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