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

被引：0

作者：

HaiChao Zhou ^{[1
]}

HuiXing Kang ^{[2
]}

Jian Wei ^{[2
]}

ChangJun Gao ^{[3
]}

Muzammil Hussain ^{[1
]}

YiJian Fu ^{[1
]}

MingDang Li ^{[1
]}

FengLan Li ^{[1
,4
]}

Steven JingLiang Xu ^{[4
]}

Fred WangFat Lee ^{[4
]}

MingGuo Jiang ^{[5
]}

YiBing Wang ^{[5
]}

XiaoXia Chen ^{[1
]}

Nora FungYee Tam ^{[1
,4
,6
]}

Tao Lang ^{[1
,5
]}

机构：

[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

[2] Institute of Ecology, College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes of Ministry of Education,Peking University

[3] Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry

[4] School of Science and Technology, The Hong Kong Metropolitan University

[5] Guangxi Key Laboratory for Polysaccharide Materials and Modifications,School of Marine Sciences and Biotechnology, Guangxi Minzu University

[6] State Key Laboratory of Marine Pollution, City University of Hong Kong

来源：

Ecological Processes | 2023年 / 12卷 / 03期

关键词：

D O I：

暂无

中图分类号：

S718.5 [森林生态学]; P593 [生物地球化学、气体地球化学]; X171.1 [生态系统与生态环境];

学科分类号：

071012 ; 0713 ; 070902 ;

摘要：

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.

引用

页码：85 / 98

页数：14