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Temporal dynamics of ultraviolet radiation impacts on litter decomposition in a semi-arid ecosystem
Wang, Jing1; Yang, Sen1; Zhang, Beibei1; Liu, Weixing; Deng, Meifeng; Chen, Shiping; Liu, Lingli1
2017
发表期刊PLANT AND SOIL
ISSN0032-079X
卷号419期号:1-2页码:71-81
摘要The emerging consensus posits that ultraviolet (UV) radiation accelerates litter decomposition in xeric environments mainly by preconditioning litter for subsequent microbial decomposition. However, how UV radiation affects the interactions among litter chemistry, microbes, and eventually litter mass during different decomposition stages is still poorly understood. Here, we conducted a 29-month in situ decomposition experiment with litter exposed to ambient and reduced UV in a semi-arid grassland. The decomposition rate for Cleistogenes squarrosa and Stipa krylovii under ambient UV was 82 and 111% greater than that under reduced UV, respectively. UV's positive effect showed three-stage temporal dynamics. During the early stage, UV had no impact on either litter chemistry or mass loss. During the intermediate stage, UV decreased litter carbon concentration and increased dissolved organic carbon concentration, but still had no effect on litter mass. During the late stage, UV exposure increased microbial population size in the surface soil and significantly increased litter mass loss. Overall, our study suggested that UV exposure accelerated litter decomposition first by improving litter biodegradability during the intermediate stage and then by enhancing microbial decomposition during the late stage. More long-term photodegradation experiments are needed to explore the biotic and abiotic interactions during different decomposition stages.
关键词Arid and semi-arid ecosystems DOC Microbial decomposition Photodegradation PLFA UV radiation
学科领域Plant Sciences
DOI10.1111/pce.13049
收录类别SCI
语种英语
WOS关键词TIERRA-DEL-FUEGO ; UV-B RADIATION ; PLANT LITTER ; MICROBIAL DECOMPOSITION ; PHOTODEGRADATION ; CARBON ; PRECIPITATION ; LIGNIN ; WATER ; EXPOSURE
WOS记录号WOS:000410801700029
出版者SPRINGER
文献子类Article
出版地DORDRECHT
EISSN1573-5036
资助机构National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31522011] ; Chinese National Key Development Program for Basic Research [2013CB956304, 2014CB954003] ; National 1000 Young Talents Program
作者邮箱lingli.liu@ibcas.ac.cn
引用统计
被引频次:32[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/2S10CLM1/22225
专题植被与环境变化国家重点实验室
作者单位1.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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GB/T 7714
Wang, Jing,Yang, Sen,Zhang, Beibei,et al. Temporal dynamics of ultraviolet radiation impacts on litter decomposition in a semi-arid ecosystem[J]. PLANT AND SOIL,2017,419(1-2):71-81.
APA Wang, Jing.,Yang, Sen.,Zhang, Beibei.,Liu, Weixing.,Deng, Meifeng.,...&Liu, Lingli.(2017).Temporal dynamics of ultraviolet radiation impacts on litter decomposition in a semi-arid ecosystem.PLANT AND SOIL,419(1-2),71-81.
MLA Wang, Jing,et al."Temporal dynamics of ultraviolet radiation impacts on litter decomposition in a semi-arid ecosystem".PLANT AND SOIL 419.1-2(2017):71-81.
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