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Specific leaf area predicts dryland litter decomposition via two mechanisms

文献类型：期刊论文

作者Liu, Guofang; Wang, Lei5; Jiang, Li5; Pan, Xu1; Huang, Zhenying; Dong, Ming2; Cornelissen, Johannes H. C.
刊名JOURNAL OF ECOLOGY
出版日期2018
卷号106期号:1页码:218-229
关键词desert functional traits litter decomposition rate photodegradation plant-soil (below-ground) interactions soil burial specific leaf area
ISSN号0022-0477
DOI10.1111/1365-2745.12868
文献子类Article
英文摘要Litter decomposition plays important roles in carbon and nutrient cycling. In dryland, both microbial decomposition and abiotic degradation (by UV light or other forces) drive variation in decomposition rates, but whether and how litter traits and position determine the balance between these processes is poorly understood. We investigated relationships between litter quality and their decomposition rates among diverse plant species in a desert ecosystem in vertically contrasting positions representing distinct decomposition environments driven by different relative contributions of abiotic and microbial degradation. Thereto, leaf litter samples from 17 desert species were sealed into litterbags and placed on the soil surface under strong solar exposure vs. shade conditions, or buried in the soil at 10cm depth, for a whole year. Litter decomposition rates were 21% and 17% higher in burial and light-exposed treatments, respectively, than those in shade. Leaf traits, i.e. specific leaf area (SLA), litter C:N ratio and lignin concentration could predict litter decomposition to some degree, but their predictive power was dependent on litter position. However, multiple linear regressions showed that SLA, litter C and P significantly affected k values for leaf litter decomposition besides litter position, with SLA standing out as a strong determinant of litter decomposition rate as related either to solar radiation or the environment below the soil surface. Furthermore, the interspecific differences in litter decomposition rates decreased over time, implying that afterlife effects of leaf traits on decomposition were attenuated.Synthesis. These findings suggest that abiotic photodegradation and soil burial mediated microbial decomposition could be responsible for higher than expected litter turnover in dryland. They point to a dual role of specific leaf area (SLA) as a promotor of decomposition rates: via relative exposure of the leaf surface to abiotic factors such as UV light vs. to soil moisture and microbes under soil burial.
学科主题Plant Sciences ; Ecology
出版地HOBOKEN
电子版国际标准刊号1365-2745
WOS关键词PLANT LITTER ; TERRESTRIAL ECOSYSTEMS ; ULTRAVIOLET-RADIATION ; FUNCTIONAL TRAITS ; SONORAN DESERT ; B RADIATION ; PHOTODEGRADATION ; SOIL ; CARBON ; LIGNIN
语种英语
WOS记录号WOS:000417839700018
出版者WILEY
资助机构State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences [G2014-02-02] ; National Key Research and Development Program of China [2016YFC0500501] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31470712]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/20622]  
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 Desert & Oasis Ecol, Xinjiang Inst Ecol & Geog, Urumqi, Peoples R China
2.Chinese Acad Forestry, Inst Wetland Res, Beijing, Peoples R China
3.Hangzhou Normal Univ, Key Lab Hangzhou City Ecosyst Protect & Restorat, Coll Life & Environm Sci, Hangzhou, Zhejiang, Peoples R China
4.Cornelissen, Johannes H. C.] Vrije Univ Amsterdam, Syst Ecol, Dept Ecol Sci, Fac Sci, Amsterdam, Netherlands
5.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Guofang,Wang, Lei,Jiang, Li,et al. Specific leaf area predicts dryland litter decomposition via two mechanisms[J]. JOURNAL OF ECOLOGY,2018,106(1):218-229.
APA Liu, Guofang.,Wang, Lei.,Jiang, Li.,Pan, Xu.,Huang, Zhenying.,...&Cornelissen, Johannes H. C..(2018).Specific leaf area predicts dryland litter decomposition via two mechanisms.JOURNAL OF ECOLOGY,106(1),218-229.
MLA Liu, Guofang,et al."Specific leaf area predicts dryland litter decomposition via two mechanisms".JOURNAL OF ECOLOGY 106.1(2018):218-229.

入库方式： OAI收割

来源：植物研究所

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