Knowledge Management System Of Institute Of Botany,CAS
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 |
ISSN | 0032-079X |
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 |
DOI | 10.1111/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 |
EISSN | 1573-5036 |
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 | |
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 |
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. |
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