The response of grassland mycorrhizal fungal abundance to a range of long-term grazing intensities

doi:10.1016/j.rhisph.2019.100178

	The response of grassland mycorrhizal fungal abundance to a range of long-term grazing intensities
	Faghihinia, Maede 1; Zou, Yi ; Chen, Zheng ; Bai, Yongfei2 ; Li, Wenhuai 2; Marrs, Rob 1; Staddon, Philip L.
	2020
发表期刊	RHIZOSPHERE
卷号	13
摘要	Keystone root symbiotic arbuscular mycorrhizal fungi play a major role in maintaining plant biodiversity, increasing plant productivity and enhancing storage of carbon in soil. AM fungi are ubiquitous and found in most ecosystems including grasslands currently experiencing increasing pressures form human activity. Grazing is known to impact AM fungi but very little is known about how AM fungi are affected by different levels of grazing intensity. Here we report on results from a long-term experimental site in a typical steppe in the north of China, containing seven levels of field-manipulated grazing intensities maintained for over 13 years. We assessed arbuscular mycorrhizal fungal abundance, represented by soil hyphal length density and mycorrhizal root colonization (mycorrhizal root frequency, intensity and arbuscule intensity) within the farm-scale field experiment. We also measured environmental variables to explain the responses of mycorrhizal fungi to grazing intensity. Our results showed that with an increase in grazing intensity, soil hyphal length density linearly decreased. There was, however, no significant trend for mycorrhizal root colonization variables in relation to grazing intensity. Mycorrhizal root frequency was negatively correlated with topographic-induced changes in soil nitrogen and phosphorus, while arbuscule intensity was marginally negatively correlated with soil available phosphorus. Further, we found a possible hump-shaped relationship between the ratio of external to internal AM fungal structures and grazing intensity. Our finding showed that external AM fungal structure was clearly impacted by grazing intensity but that this was not the case for internal mycorrhizal structures. This indicated that mycorrhizal functioning was impacted by the intensity of grazing as the mycorrhizal structures responded differently. Indeed the ratio of the foraging extra-radical mycorrhizal hyphae to intra-radical mycorrhizal structures was highest at moderate grazing intensity but strongly decreased by high grazing intensity. Our study suggests that the impacts of grazing intensity on the plant-AMF association could lead to further knock-on effects on the plant-soil system via the feedbacks that exist between plant and AMF communities.
关键词	AMF Grassland Overgrazing Soil nutrients availability Topography Mixed-effects model
学科领域	Agronomy ; Plant Sciences ; Soil Science
DOI	10.1016/j.rhisph.2019.100178
收录类别	SCI
语种	英语
WOS关键词	ARBUSCULAR MYCORRHIZAE ; INNER-MONGOLIA ; COLONIZATION ; STEPPE ; VEGETATION ; DIVERSITY ; HERBIVORY ; COMMUNITY ; CARBON ; TOPOGRAPHY
WOS研究方向	Agriculture ; Plant Sciences
WOS记录号	WOS:000521128100012
出版者	ELSEVIER
文献子类	Article
出版地	AMSTERDAM
EISSN	2452-2198
资助机构	XJTLU Research Development Fund [RDF-15-02-13] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31600365] ; China Postdoctoral Science FoundationChina Postdoctoral Science Foundation [2016M591283]
作者邮箱	yi.zou@xjtlu.edu.cn
引用统计	被引频次：20[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/21849
专题	植被与环境变化国家重点实验室
作者单位	1.[Faghihinia, Maede; Zou, Yi; Chen, Zheng; Staddon, Philip L.] Xian Jiaotong Liverpool Univ, Dept Hlth & Environm Sci, Suzhou 215123, Jiangsu, Peoples R China 2.Univ Liverpool, Sch Environm Sci, Liverpool L69 3GP, Merseyside, England 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 4.Staddon, Philip L.] Univ Gloucestershire, Countryside & Community Res Inst, Cheltenham GL50 4AZ, Glos, England 5.Staddon, Philip L.] Royal Agr Univ, Sch Agr Food & Environm, Cirencester GL7 6JS, England
推荐引用方式 GB/T 7714	Faghihinia, Maede,Zou, Yi,Chen, Zheng,et al. The response of grassland mycorrhizal fungal abundance to a range of long-term grazing intensities[J]. RHIZOSPHERE,2020,13.
APA	Faghihinia, Maede.,Zou, Yi.,Chen, Zheng.,Bai, Yongfei.,Li, Wenhuai.,...&Staddon, Philip L..(2020).The response of grassland mycorrhizal fungal abundance to a range of long-term grazing intensities.RHIZOSPHERE,13.
MLA	Faghihinia, Maede,et al."The response of grassland mycorrhizal fungal abundance to a range of long-term grazing intensities".RHIZOSPHERE 13(2020).

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