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Effects of natural vegetation restoration on dissolved organic matter (DOM) biodegradability and its temperature sensitivity
Liu, Hongfei1,2,3; Xu, Hongwei1,3; Wu, Yang1,3; Ai, Zemin1,3; Zhang, Jiaoyang1,3; Liu, Guobin1,3; Xue, Sha1,3
2021-03-01
Source PublicationWATER RESEARCH
ISSN0043-1354
Volume191Pages:12
Corresponding AuthorXue, Sha(xuesha100@163.com)
AbstractBiodegradation of dissolved organic matter (DOM) plays a key role in regulating both production of greenhouse gases and accumulation and stabilisation of soil organic matter (SOM). However, the mechanisms by which natural vegetation restoration affects the extent, rate, and temperature sensitivity of DOM biodegradation are poorly understood. Elucidating these mechanisms is important for SOM management, especially in light of future climate warming scenarios. In this study, a laboratory DOM solution incubation experiment was conducted to comprehensively investigate the effects of temperature and natural vegetation restoration spanning a period of 160 y on DOM biodegradation in the Loess Plateau, China. The results indicated that dissolved organic C (DOC) biodegradation significantly decreased with vegetation restoration after an incubation period of 60 d. Further, biodegradation of dissolved organic N (DON) and dissolved organic P (DOP) significantly decreased after farmland abandonment. Specifically, the lowest values were observed in pioneer (Populus davidiana) and mingled (Populus davidiana and Quercus liaotungensis) forests. Generally, an increase in temperature significantly promoted the biodegradation of DOC, DON, and DOP by enhancing the microbial utilisation efficiencies of recalcitrant humic substrates (i.e., low-molecular-weight humic materials). Our results suggest that DOM biodegradability and its temperature sensitivity were regulated by DOM substrate quality (i.e, recalcitrant humic materials), and microbial properties (i.e., gram-negative bacterial and fungal PLFA, enzyme activities). Additionally, our results suggest that climax forest communities (Quercus liaotungensis) played a vital role in reducing DOC and DOP losses. This could be attributed to the low Q10 of the DOC and DOP biodegradation rates. (c) 2020 Elsevier Ltd. All rights reserved.
KeywordTemperature sensitivity DOM biodegradation Dissolved organic carbon Dissolved organic nitrogen Three-dimensional excitation-emission matrix (EEM) fluorescence spectroscopy Secondary vegetation succession
DOI10.1016/j.watres.2020.116792
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFC0501707] ; National Natural Science Foundation of China[41771557]
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China
WOS Research AreaEngineering ; Environmental Sciences & Ecology ; Water Resources
WOS SubjectEngineering, Environmental ; Environmental Sciences ; Water Resources
WOS IDWOS:000615940000004
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/160556
Collection中国科学院地理科学与资源研究所
Corresponding AuthorXue, Sha
Affiliation1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Univ Bayreuth, Dept Agroecol, D-95440 Bayreuth, Germany
3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Liu, Hongfei,Xu, Hongwei,Wu, Yang,et al. Effects of natural vegetation restoration on dissolved organic matter (DOM) biodegradability and its temperature sensitivity[J]. WATER RESEARCH,2021,191:12.
APA Liu, Hongfei.,Xu, Hongwei.,Wu, Yang.,Ai, Zemin.,Zhang, Jiaoyang.,...&Xue, Sha.(2021).Effects of natural vegetation restoration on dissolved organic matter (DOM) biodegradability and its temperature sensitivity.WATER RESEARCH,191,12.
MLA Liu, Hongfei,et al."Effects of natural vegetation restoration on dissolved organic matter (DOM) biodegradability and its temperature sensitivity".WATER RESEARCH 191(2021):12.
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