Abstract

Background

Mangrove 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.

Methods

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 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.

Conclusion

During the leaching process, tannins’ fate was species-specific, while the dynamics were almost similar.

Details

Title
Microcosm study on fate and dynamics of mangrove tannins during leaf litter leaching
Author
Zhou, Hai-Chao 1 ; Kang, Hui-Xing 2 ; Wei, Jian 2 ; Gao, Chang-Jun 3 ; Hussain, Muzammil 1 ; Fu, Yi-Jian 1 ; Li, Ming-Dang 1 ; Li, Feng-Lan 4 ; Xu, Steven Jing-Liang 5 ; Lee, Fred Wang-Fat 5 ; Jiang, Ming-Guo 6 ; Wang, Yi-Bing 6 ; Chen, Xiao-Xia 1 ; Tam, Nora Fung-Yee 7 ; Lang, Tao 8   VIAFID ORCID Logo 

1  Shenzhen University, 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, China (GRID:grid.263488.3) (ISNI:0000 0001 0472 9649) 
2  Peking University, Institute of Ecology, College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes of Ministry of Education, Beijing, China (GRID:grid.11135.37) (ISNI:0000 0001 2256 9319) 
3  Guangdong Academy of Forestry, Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangzhou, China (GRID:grid.464300.5) (ISNI:0000 0001 0373 5991) 
4  Shenzhen University, 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, China (GRID:grid.263488.3) (ISNI:0000 0001 0472 9649); The Hong Kong Metropolitan University, School of Science and Technology, Hong Kong, China (GRID:grid.263488.3) 
5  The Hong Kong Metropolitan University, School of Science and Technology, Hong Kong, China (GRID:grid.263488.3) 
6  Guangxi Minzu University, Guangxi Key Laboratory for Polysaccharide Materials and Modifications, School of Marine Sciences and Biotechnology, Nanning, China (GRID:grid.411860.a) (ISNI:0000 0000 9431 2590) 
7  Shenzhen University, 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, China (GRID:grid.263488.3) (ISNI:0000 0001 0472 9649); The Hong Kong Metropolitan University, School of Science and Technology, Hong Kong, China (GRID:grid.263488.3); City University of Hong Kong, State Key Laboratory of Marine Pollution, Hong Kong, China (GRID:grid.35030.35) (ISNI:0000 0004 1792 6846) 
8  Shenzhen University, 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, China (GRID:grid.263488.3) (ISNI:0000 0001 0472 9649); Guangxi Minzu University, Guangxi Key Laboratory for Polysaccharide Materials and Modifications, School of Marine Sciences and Biotechnology, Nanning, China (GRID:grid.411860.a) (ISNI:0000 0000 9431 2590) 
Pages
37
Publication year
2023
Publication date
Dec 2023
Publisher
Springer Nature B.V.
e-ISSN
21921709
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1186/s13717-023-00453-w
ProQuest document ID
2856655999
Copyright
© The Author(s) 2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.