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Microcosm study on fate and dynamics of mangrove tannins during leaf litter leaching

Ecological Processes 2023年第1期12卷 520-533页

作者： Hai-Chao Zhou Hui-Xing Kang Jian Wei Chang-Jun Gao Muzammil Hussain Yi-Jian Fu Ming-Dang Li Feng-Lan Li Steven Jing-Liang Xu Fred Wang-Fat Lee Ming-Guo Jiang Yi-Bing Wang Xiao-Xia Chen Nora Fung-Yee Tam Tao Lang Greater Bay Area Coastal mangrove Wetland Research&Development Centre MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay AreaCollege of Life Sciences and OceanographyShenzhen UniversityShenzhen 518060China Institute of Ecology College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes of Ministry of EducationPeking UniversityBeijing 100091China Guangdong Provincial Key Laboratory of Silviculture Protection and UtilizationGuangdong Academy of ForestryGuangzhou 510520China School of Science and Technology The Hong Kong Metropolitan UniversityKowloonHong Kong 999077SARChina Guangxi Key Laboratory for Polysaccharide Materials and Modifications School of Marine Sciences and BiotechnologyGuangxi Minzu UniversityNanning 530008China State Key Laboratory of Marine Pollution City University of Hong KongKowloonHong Kong 999077SARChina

Background mangrove tannins can participate in wetland biogeochemical ***,their fate and dynamics during leaf litter leaching have yet to be elucidated in coastal aquatic *** By using a simulated microcosm experiment,changes in leaf litter mass and tannin compounds,including total phenolics(TP),extractable condensed tannins(ECT),and bound condensed tannins(BCT),were examined in the litters and leachates of four common mangrove species:Kandelia obovata(Ko),Aegiceras corniculatum(Ac),Sonneratia apetala(Sa),and Avicennia marina(Am).Results Leaching caused a notable decline in litter mass,TP,and ECT in the leaf litter of Ko,Ac,Sa,and Am,while BCT increased significantly in Ko and *** in foliar TP was higher than in leaf litter mass,and loss in foliar ECT was higher than in TP of Ko and Ac,but Sa showed the opposite *** temporal changes of TP and ECT concentrations in leachates followed a similar trend,with an initial increase followed by a *** dynamics in Ko and Ac leachates correlated with their TP concentrations,while in Sa leachate,the peak ECT occurred 72 h later than its TP *** leachate ECT concentrations were highest in Ac,followed by Ko,and significantly lower in *** peak TP and ECT proportions in leachates accounted for 9.2-23.9%and 7.7-9.4%of the total decreases in foliar TP and ECT,*** During the leaching process,tannins’fate was species-specific,while the dynamics were almost similar.

关键词： mangrove tannins Leaf litter decomposition Leaching Total phenolics Condensed tannins

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