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Temporal dynamics of ultraviolet radiation impacts on litter decomposition in a semi-arid ecosystem

文献类型：期刊论文

作者Wang, Jing1; Yang, Sen1; Zhang, Beibei1; Liu, Weixing; Deng, Meifeng; Chen, Shiping; Liu, Lingli1
刊名PLANT AND SOIL
出版日期2017
卷号419期号:1-2页码:71-81
关键词Arid and semi-arid ecosystems DOC Microbial decomposition Photodegradation PLFA UV radiation
ISSN号0032-079X
DOI10.1111/pce.13049
文献子类Article
英文摘要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.
学科主题Plant Sciences
出版地DORDRECHT
电子版国际标准刊号1573-5036
WOS关键词TIERRA-DEL-FUEGO ; UV-B RADIATION ; PLANT LITTER ; MICROBIAL DECOMPOSITION ; PHOTODEGRADATION ; CARBON ; PRECIPITATION ; LIGNIN ; WATER ; EXPOSURE
语种英语
WOS记录号WOS:000410801700029
出版者SPRINGER
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
源URL[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
推荐引用方式
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.

入库方式： OAI收割

来源：植物研究所

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