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

Ecological Processes

Research

Ming-Dang Li¹  Hai-Chao Zhou¹  Xiao-Xia Chen¹  Muzammil Hussain¹  Yi-Jian Fu¹  Tao Lang²  Feng-Lan Li³  Nora Fung-Yee Tam⁴  Chang-Jun Gao⁵  Ming-Guo Jiang⁶  Yi-Bing Wang⁶  Jian Wei⁷  Hui-Xing Kang⁷  Steven Jing-Liang Xu⁸  Fred Wang-Fat Lee⁸ 

[1] Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area, College of Life Sciences and Oceanography, Shenzhen University, 518060, Shenzhen, China;Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area, College of Life Sciences and Oceanography, Shenzhen University, 518060, Shenzhen, China;Guangxi Key Laboratory for Polysaccharide Materials and Modifications, School of Marine Sciences and Biotechnology, Guangxi Minzu University, 530008, Nanning, China;Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area, College of Life Sciences and Oceanography, Shenzhen University, 518060, Shenzhen, China;School of Science and Technology, The Hong Kong Metropolitan University, Kowloon, 999077, Hong Kong, SAR, China;Greater Bay Area Coastal Mangrove Wetland Research & Development Centre, MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area, College of Life Sciences and Oceanography, Shenzhen University, 518060, Shenzhen, China;School of Science and Technology, The Hong Kong Metropolitan University, Kowloon, 999077, Hong Kong, SAR, China;State Key Laboratory of Marine Pollution, City University of Hong Kong, Kowloon, 999077, Hong Kong, SAR, China;Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, 510520, Guangzhou, China;Guangxi Key Laboratory for Polysaccharide Materials and Modifications, School of Marine Sciences and Biotechnology, Guangxi Minzu University, 530008, Nanning, China;Institute of Ecology, College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes of Ministry of Education, Peking University, 100091, Beijing, China;School of Science and Technology, The Hong Kong Metropolitan University, Kowloon, 999077, Hong Kong, SAR, China;

关键词: Mangrove tannins;    Leaf litter decomposition;    Leaching;    Total phenolics;    Condensed tannins;   

DOI  :  10.1186/s13717-023-00453-w

 received in 2023-03-30, accepted in 2023-08-14,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundMangrove tannins can participate in wetland biogeochemical cycling. However, their fate and dynamics during leaf litter leaching have yet to be elucidated in coastal aquatic environments.MethodsBy 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).ResultsLeaching 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 Ac. Loss 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 result. The temporal changes of TP and ECT concentrations in leachates followed a similar trend, with an initial increase followed by a decrease. ECT 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 peak. The leachate ECT concentrations were highest in Ac, followed by Ko, and significantly lower in Sa. The 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, respectively.ConclusionDuring the leaching process, tannins’ fate was species-specific, while the dynamics were almost similar.

【 授权许可】

CC BY   
© Institute of Applied Ecology, CAS and Springer-Verlag GmbH, DE 2023

【 图 表 】

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