Carbon storage and its influencing factors in Hainan Dongzhangang mangrove wetlands
Kun Xin A B , Kui Yan A , Chun Gao A and Zhen Li A
+ Author Affiliations
- Author Affiliations
A Hainan Normal University, Haikou, 571158, P.R. China.
B Corresponding author. Email: xin_kun@126.com
Marine and Freshwater Research 69(5) 771-779 https://doi.org/10.1071/MF17101
Submitted: 20 May 2017 Accepted: 9 October 2017 Published: 6 February 2018
Abstract
Mangrove wetlands are considered to be the largest carbon storage ecotype in subtropical and tropical coastal areas. The aim of the present study was to understand the distribution features of carbon storage in the Hainan Dongzhaigang mangrove wetlands in China. Using the 3S techniques (including remote sensing, geography information system and global position system) and field investigations, mangrove communities in study area were divided into 12 main types and carbon storage in each community was analysed. Soil organic carbon (SOC) was determined by the potassium dichromate external heating method, plant biomass was calculated using equations and the litter from each community was collected every month and its carbon storage was determined using the decomposition rate model. Total carbon storage in the 12 mangrove communities was 16.81 × 104 Mg of which 13.45 × 104 Mg (80.01%) was fixed by the soil, 2.66 × 104 Mg (15.82%) was fixed by plants and 0.69 × 104 Mg (4.10%) was fixed by litter. Comparisons of carbon storage between communities showed that the Sonneratia caseolaris community stored the most carbon (14.17 Mg C ha–1), followed by the Bruguiera sexangula community (14.12 Mg C ha–1), whereas carbon storage was lowest in the semimangrove community, including Pongamia pinnata and Hibiscus tiliaceus, and the herbaceous community, including Acrostichum aureum and Acanthus ilicifolius.
Additional keywords: carbon in litter, soil organic carbon.
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