The interaction between abiotic photodegradation and microbial decomposition under ultraviolet radiation
文献类型：期刊论文
| 作者 | Wang, Jing2; Liu, Lingli ; Wang, Xin2; Chen, Yiwei2
|
| 刊名 | GLOBAL CHANGE BIOLOGY
 |
| 出版日期 | 2015 |
| 卷号 | 21期号:5页码:2095-2104 |
| 关键词 | abiotic degradation DOC lignin litter decomposition meta-analysis microbial activity microbial decomposition microcosm photodegradation |
| ISSN号 | 1354-1013 |
| DOI | 10.1111/gcb.12812 |
| 文献子类 | Article |
| 英文摘要 | 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. |
| 学科主题 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
| 出版地 | HOBOKEN |
| 电子版国际标准刊号 | 1365-2486 |
| 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) |
| 语种 | 英语 |
| WOS记录号 | WOS:000353220500027 |
| 出版者 | WILEY |
| 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 |
| 源URL | [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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.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 | 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. |
入库方式： OAI收割
来源：植物研究所
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