Journal of Tropical Oceanography ›› 2025, Vol. 44 ›› Issue (4): 187-199.doi: 10.11978/2024141CSTR: 32234.14.2024141

• Marine Environmental Science • Previous Articles     Next Articles

Study on biomass models of juvenile mangroves and carbon storage in young mangrove ecosystems*

HU Xin1(), XIONG Lanlan1(), CHEN Shunyang2, ZHANG Huangchen1, ZOU Yiyang1, ZHANG Jichao1, LIU Dongxi1, HE Jialu1, WU Yuqi1, ZHU Zhenjie1   

  1. 1. Guangdong Center for Marine Development Research, Guangzhou 510220, China
    2. Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
  • Received:2024-07-18 Revised:2024-08-02 Online:2025-07-10 Published:2025-07-31
  • Contact: HU Xin, XIONG Lanlan
  • Supported by:
    Science and Technology Projects of Guangdong Provincial Department of Natural Resources(GDZRZYKJ2023002)

Abstract:

As global climate change intensifies, mangroves—a vital coastal blue carbon ecosystem—have garnered increasing attention. This study aimed to develop biomass models for juvenile mangroves and assess the carbon storage of young mangrove ecosystems in Kaozhouyang Bay. The results provide empirical methods and a scientific basis for the rapid and accurate assessment of carbon stocks in artificially planted young mangroves. The study focuses on five artificially planted juvenile mangrove species in Kaozhouyang Bay: Avicennia marina, Rhizophora stylosa, Kandelia obovata, Bruguiera gymnorhiza, and Aegiceras corniculatum. Various factors derived from basal diameter (D) and tree height (H) were used to construct optimal allometric equations between biomass and dendrometric parameters. Furthermore, the best-performing biomass models were applied to estimate vegetation carbon storage and ecosystem carbon storage in the artificially planted mangroves of Kaozhouyang Bay. The findings indicated that multivariable models generally outperformed univariable models, except for the below-ground biomass model of Aegiceras corniculatum. The optimal biomass models for Avicennia marina, Rhizophora stylosa, Bruguiera gymnorhiza, and Aegiceras corniculatum were power function models, whereas linear models best fit Kandelia obovata. The carbon density of the artificially planted young mangrove ecosystems in Kaozhouyang Bay was (91.26±17.32) Mg C·hm-2, with a total carbon stock of approximately 35964.65 Mg C. Soil carbon constituted 78.3% to 98.5% of the total carbon stock in these ecosystems. Among the different mangrove communities, vegetation carbon density ranked as follows (from highest to lowest): Aegiceras corniculatum + Kandelia obovata communities, Rhizophora stylosa + Avicennia marina communities, Avicennia marina community, and Bruguiera gymnorhiza community. These results offer valuable insights for assessing carbon storage and guiding ecological restoration efforts in artificially planted mangroves in Guangdong Province and nationwide.

Key words: juvenile mangroves, biomass models, carbon density, artificial mangrove, Kaozhouyang Bay

CLC Number: 

  • P76