Knowledge Management System Of Institute Of Botany,CAS
| The interaction between abiotic photodegradation and microbial decomposition under ultraviolet radiation | |
Wang, Jing1; Liu, Lingli ; Wang, Xin1; Chen, Yiwei1
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| 2015 | |
| 发表期刊 | GLOBAL CHANGE BIOLOGY
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| ISSN | 1354-1013 |
| 卷号 | 21期号:5页码:2095-2104 |
| 摘要 | Elevated ultraviolet (UV) radiation has been demonstrated to stimulate litter decomposition. Despite years of research, it is still not fully understood whether the acceleration in litter degradation is primarily attributed to abiotic photodegradation or the combined effects of abiotic photodegradation and microbial decomposition. In this study, we used meta-analysis to synthesize photodegradation studies and compared the effects of UV radiation on litter decomposition between abiotic and biotic conditions. We also conducted a microcosm experiment to assess the effects of UV radiation on litter biodegradability and microbial activity. Overall, our meta-analysis found that under abiotic photodegradation, UV radiation reduced the remaining litter mass by 1.44% (95% CI: 0.85% to 2.08%), did not affect the remaining lignin and increased the dissolved organic carbon (DOC) concentration by 14.01% (1.49-23.67%). Under combined abiotic photodegradation and microbial decomposition, UV radiation reduced the remaining litter mass and lignin by 1.60% (0.04-3.58%) and 16.07% (9.27-24.23%), respectively, but did not alter DOC concentration. UV radiation had no significant impact on soil microbial biomass carbon (MBC), but it reduced microbial respiration by 44.91% (2.26-78.62%) and altered the composition of the microbial community. In addition, UV radiation reduced nitrogen (N) immobilization by 19.44% (4.77-37.92%). Our microcosm experiment further indicated that DOC concentration and the amount of respired C in UV-treated litter increased with UV exposure time, suggesting that longer UV exposure resulted in greater biodegradability. Overall, our study suggested that UV exposure could increase litter biodegradability by increasing the microbial accessibility of lignin, as well as the labile carbon supply to microbes. However, the remaining litter mass was not different between the abiotic and biotic conditions, most likely because the positive effect of UV radiation on litter biodegradability was offset by its negative effect on microbial activity. Our results also suggested that UV radiation could alter the N cycle during decomposition, primarily by inhibiting N immobilization. |
| 关键词 | abiotic degradation DOC lignin litter decomposition meta-analysis microbial activity microbial decomposition microcosm photodegradation |
| 学科领域 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
| DOI | 10.1111/gcb.12812 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS关键词 | PLANT LITTER DECOMPOSITION ; UV-B RADIATION ; EXPOSURE ; PRECIPITATION ; AVAILABILITY ; METAANALYSIS ; RELEASE ; BIOMASS ; LIGNIN ; CARBON |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| WOS记录号 | WOS:000353220500027 |
| 出版者 | WILEY |
| 文献子类 | Article |
| 出版地 | HOBOKEN |
| EISSN | 1365-2486 |
| 资助机构 | Chinese National Key Development Program for Basic Research [2013CB956304, 2014CB954003] ; National Natural Science Foundation of China [13263A1001] ; 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/2S10CLM1/25694 |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 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,Liu, Lingli,Wang, Xin,et al. The interaction between abiotic photodegradation and microbial decomposition under ultraviolet radiation[J]. GLOBAL CHANGE BIOLOGY,2015,21(5):2095-2104. |
| APA | Wang, Jing,Liu, Lingli,Wang, Xin,&Chen, Yiwei.(2015).The interaction between abiotic photodegradation and microbial decomposition under ultraviolet radiation.GLOBAL CHANGE BIOLOGY,21(5),2095-2104. |
| MLA | Wang, Jing,et al."The interaction between abiotic photodegradation and microbial decomposition under ultraviolet radiation".GLOBAL CHANGE BIOLOGY 21.5(2015):2095-2104. |
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