Positive and negative effects of UV irradiance explain interaction of litter position and UV exposure on litter decomposition and nutrient dynamics in a semi-arid dune ecosystem

doi:10.1016/j.soilbio.2018.06.013

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	Positive and negative effects of UV irradiance explain interaction of litter position and UV exposure on litter decomposition and nutrient dynamics in a semi-arid dune ecosystem
	Erdenebileg, Enkhmaa 3; Ye, Xuehua ; Wang, Congwen 3; Huang, Zhenying ; Liu, Guofang ; Cornelissen, Johannes H. C.
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2018
卷号	124 页码:245-254
关键词	Dryland Litter C:N ratio Litter position Litter quality Microbial decomposition Photodegradation UV radiation
ISSN号	0038-0717
DOI	10.1016/j.soilbio.2018.06.013
文献子类	Article
英文摘要	Solar radiation mediated photodegradation of leaf litter has been studied substantially as it plays important roles in the cycling of carbon (C) and nutrients in dryland ecosystems. However, the mechanism by which ultraviolet (UV) radiation and its interaction with litter quality and microbial degradation affect dryland litter decomposition is still uncertain. A field experiment was carried out in semiarid Mu Us inland dunes of Inner Mongolia, China to investigate the effects of UV radiation and litter position on leaf litter decomposition of eight contrasting species (three perennial grasses, three shrubs, two annual forbs) representing different litter qualities over a whole year of incubation. The results showed that UV radiation increased mass loss of suspended litters for two perennial grasses and two annual forbs, but had no significant effect on the other four species considered; across species the percentage increase in mass loss ranged from 4.5 to 27.3% with an average of 13.7%. C release from suspended litters in response to UV radiation showed similar patterns with mass loss. Nitrogen (N) release from litters on the soil surface was lower than in suspended position because the former was involved in N immobilization driven by microbial decomposition. There were no net effects of UV radiation on decomposition rates of surface litters possibly due to the positive effects of photochemical process offsetting negative effects on microbes. Multiple linear regressions showed that the C:N ratio of initial leaf litter and leaf dry matter content (LDMC) could predict the rate of litter decomposition, in which litter C:N ratio had stronger influence. The findings, based on multiple species, highlight the importance of photodegradation on litter nitrogen and/or carbon mineralization in drylands as mediated by different abiotic and biotic drivers.
学科主题	Soil Science
电子版国际标准刊号	1879-3428
出版地	OXFORD
WOS关键词	ULTRAVIOLET-B RADIATION ; PLANT LITTER ; LEAF TRAITS ; PHOTODEGRADATION ; CARBON ; CLIMATE ; QUALITY ; LIGNIN ; RATES ; PRECIPITATION
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000444358200029
资助机构	National Science Foundation of China (NSFC)National Natural Science Foundation of China (NSFC) [31470712] ; Key Basic Research and Development Plan of ChinaNational Basic Research Program of China [2016YFC050080502] ; strategy of CAS Biological Resource Service Networking Project [ZSSD-014] ; National Science and Technology Support Program [2012BAD16B03] ; CAS President's International Fellowship Initiative (PIFI) [2018VCA0014] ; CAS-TWAS President's Fellowship for the International Ph.D Students
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/20601]
专题	植被与环境变化国家重点实验室
作者单位	1.Cornelissen, Johannes H. C.] Vrije Univ, Dept Ecol Sci, Syst Ecol, Boelelaan 1085, NL-1081 HV Amsterdam, Netherlands 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Erdenebileg, Enkhmaa,Ye, Xuehua,Wang, Congwen,et al. Positive and negative effects of UV irradiance explain interaction of litter position and UV exposure on litter decomposition and nutrient dynamics in a semi-arid dune ecosystem[J]. SOIL BIOLOGY & BIOCHEMISTRY,2018,124:245-254.
APA	Erdenebileg, Enkhmaa,Ye, Xuehua,Wang, Congwen,Huang, Zhenying,Liu, Guofang,&Cornelissen, Johannes H. C..(2018).Positive and negative effects of UV irradiance explain interaction of litter position and UV exposure on litter decomposition and nutrient dynamics in a semi-arid dune ecosystem.SOIL BIOLOGY & BIOCHEMISTRY,124,245-254.
MLA	Erdenebileg, Enkhmaa,et al."Positive and negative effects of UV irradiance explain interaction of litter position and UV exposure on litter decomposition and nutrient dynamics in a semi-arid dune ecosystem".SOIL BIOLOGY & BIOCHEMISTRY 124(2018):245-254.