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High night-time humidity and dissolved organic carbon content support rapid decomposition of standing litter in a semi-arid landscape

文献类型：期刊论文

作者Wang, Jing2; Liu, Lingli2; Wang, Xin; Yang, Sen2; Zhang, Beibei2; Li, Ping2; Qiao, Chunlian2; Deng, Meifeng2; Liu, Weixing
刊名FUNCTIONAL ECOLOGY
出版日期2017
卷号31期号:8页码:1659-1668
关键词decomposition dissolved organic carbon microbial activity night-time humidity phospholipid fatty acid soil organic carbon standing litter
ISSN号0269-8463
DOI10.1002/ece3.3488
文献子类Article
英文摘要1. Litter in arid and semi-arid ecosystems usually exhibits a prolonged standing dead phase after senescence; however, we know little about the ways in which abiotic and microbial processes affect standing litter decomposition. 2. We conducted a 26-month in situ decomposition experiment in a steppe to investigate the potential mechanisms governing the decomposition of standing litter, and a 192-day laboratory incubation experiment to further explore the impacts of the standing dead stage on the subsequent litter decomposition and soil organic carbon (SOC) formation after the litter falls to the soil surface. 3. Compared with soil surface litter, standing litter has higher dissolved organic carbon (DOC) content. Standing litter also experienced higher night-time relative humidity on its surface, which enhanced litter moisture content. The higher DOC concentration, combined with the greater night-time moisture content, stimulated more microbial activity in standing litter. The decomposition rate (k) of standing litter was 92% higher than that of soil surface litter. Moreover, the standing phase conditioned the litter, leading to more rapid decomposition after the litter fell to the soil surface, and increasing the efficiency with which the litter formed SOC. 4. We conclude that the long-neglected standing phase greatly determines litter decomposition and soil carbon storage in semi-arid regions. Accounting for standing litter decomposition is critical for accurately simulating carbon turnover in arid and semi-arid ecosystems.
学科主题Environmental Sciences & Ecology ; Evolutionary Biology
出版地HOBOKEN
电子版国际标准刊号1365-2435
WOS关键词PLANT LITTER ; CO2 EVOLUTION ; WATER-VAPOR ; MATTER ; GRASSLAND ; PATTERNS ; MOISTURE ; LIGHT ; PHOTODEGRADATION ; FLUXES
语种英语
WOS记录号WOS:000418824800016
出版者WILEY
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/2S10CLM1/22049]  
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, Coll Resources & Environm, 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. High night-time humidity and dissolved organic carbon content support rapid decomposition of standing litter in a semi-arid landscape[J]. FUNCTIONAL ECOLOGY,2017,31(8):1659-1668.
APA Wang, Jing.,Liu, Lingli.,Wang, Xin.,Yang, Sen.,Zhang, Beibei.,...&Liu, Weixing.(2017).High night-time humidity and dissolved organic carbon content support rapid decomposition of standing litter in a semi-arid landscape.FUNCTIONAL ECOLOGY,31(8),1659-1668.
MLA Wang, Jing,et al."High night-time humidity and dissolved organic carbon content support rapid decomposition of standing litter in a semi-arid landscape".FUNCTIONAL ECOLOGY 31.8(2017):1659-1668.

入库方式： OAI收割

来源：植物研究所

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