Long-Term Grazing Intensity Impacts Belowground Carbon Allocation and Mycorrhizas Revealed by 13CO2 Pulse Labeling

doi:10.1016/j.rama.2022.11.001

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	Long-Term Grazing Intensity Impacts Belowground Carbon Allocation and Mycorrhizas Revealed by 13CO2 Pulse Labeling
	Faghihinia, Maede 2; Zou, Yi ; Bai, Yongfei 3; Pourbakhtiar, Alireza 4; Marrs, Rob 2; Staddon, Philip L.
刊名	RANGELAND ECOLOGY & MANAGEMENT
	2023
卷号	86 页码:64-72
关键词	AM fungi Carbon flux Grassland Grazing density Respiration Stable isotope labeling
ISSN号	1550-7424
DOI	10.1016/j.rama.2022.11.001
文献子类	Article
英文摘要	Despite the importance of grasslands for carbon storage and climate regulation, there is uncertainty about the effect of livestock grazing intensity on aboveground carbon assimilation and belowground carbon partitioning. Furthermore, the relationship between belowground carbon allocation and arbuscular mycorrhizal fungi, which serve as a conduit for carbon movement through the plant and soil, is unclear. To investigate this, we used an in situ C-13 stable isotope pulse-chase labeling approach in plots under seven rates of sheep grazing intensity in a steppe grassland in northern China. We quantified the allocation of carbon to plants, soil, and soil-respired CO2 along with measurements of mycorrhizal hyphal density in the soil. With increasing grazing intensity, carbon assimilation per unit shoot biomass increased significantly, whereas carbon allocation to roots marginally decreased. Soil-respired CO2 appeared to be independent of grazing intensity. Mycorrhizal hyphal density decreased with increasing grazing intensity and was correlated significantly with new carbon input to roots 2 d after labeling and marginally related to that of soil 1 d after the 13 C-CO2 pulse. Our study suggests that grazing intensity alters the distribution of carbon among different carbon pools within the plant-soil system. The results also underscored the key role of mycorrhizas as a fast route for carbon transfer from plant to soil. (c) 2022 The Society for Range Management. Published by Elsevier Inc. All rights reserved.
学科主题	Ecology ; Environmental Sciences
电子版国际标准刊号	1551-5028
出版地	LAKEWOOD
WOS关键词	INNER-MONGOLIA ; SOIL CARBON ; UPLAND GRASSLAND ; FUNGI ; NITROGEN ; STEPPE ; PLANT ; ROOT ; ECOSYSTEM ; HYPHAE
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	SOC RANGE MANAGEMENT
WOS记录号	WOS:000912490400008
资助机构	[RDF-15-0213]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/29114]
专题	植被与环境变化国家重点实验室
作者单位	1.Staddon, Philip L.] Univ Gloucestershire, Countryside & Community Res Inst, Cheltenham GL50 4AZ, Glos, England 2.[Faghihinia, Maede; Zou, Yi; Staddon, Philip L.] Xian Jiaotong Liverpool Univ, Dept Hlth & Environm Sci, Suzhou 215123, Jiangsu, Peoples R China 3.Univ Liverpool, Sch Environm Sci, Liverpool L69 3GP, Merseyside, England 4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 5.Univ Liverpool, Sch Engn, Liverpool L69 3GP, Merseyside, England
推荐引用方式 GB/T 7714	Faghihinia, Maede,Zou, Yi,Bai, Yongfei,et al. Long-Term Grazing Intensity Impacts Belowground Carbon Allocation and Mycorrhizas Revealed by 13CO2 Pulse Labeling[J]. RANGELAND ECOLOGY & MANAGEMENT,2023,86:64-72.
APA	Faghihinia, Maede,Zou, Yi,Bai, Yongfei,Pourbakhtiar, Alireza,Marrs, Rob,&Staddon, Philip L..(2023).Long-Term Grazing Intensity Impacts Belowground Carbon Allocation and Mycorrhizas Revealed by 13CO2 Pulse Labeling.RANGELAND ECOLOGY & MANAGEMENT,86,64-72.
MLA	Faghihinia, Maede,et al."Long-Term Grazing Intensity Impacts Belowground Carbon Allocation and Mycorrhizas Revealed by 13CO2 Pulse Labeling".RANGELAND ECOLOGY & MANAGEMENT 86(2023):64-72.