Relationships between above- and below-ground carbon stocks in mangrove forests facilitate better estimation of total mangrove blue carbon

Carbon Balance and Management

卷:16

Xiaoping Diao¹  Zheng Dai²  Xiaoshan Zhu²  Xiaowei Cui³  Yuchen Meng³  Guanghui Lin³  Jiankun Bai³  Ruikun Gou³  Jianxiang Feng⁴ 

[1] College of Life Science, Hainan Normal University;

[2] Institute of Ocean Engineering, Tsinghua Shenzhen International Graduate School;

[3] Key Laboratory for Earth System Modeling, Ministry of Education, Department of Earth System Science, Tsinghua University;

[4] School of Marine Sciences, Sun Yat-Sen University;

关键词: Carbon stock estimation;    Mangrove biomass;    Coastal wetland ecosystem;    Blue carbon;    Remote sensing;   

DOI  :  10.1186/s13021-021-00172-9

来源: DOAJ

【 摘 要 】

Abstract Background Although great efforts have been made to quantify mangrove carbon stocks, accurate estimations of below-ground carbon stocks remain unreliable. In this study, we examined the distribution patterns of mangrove carbon stocks in China and other countries using our own field survey data and datasets from published literature. Based on these data, we investigated the possible relationships between above-ground carbon stock (AGC) and below-ground carbon stock (BGC) for mangrove forests, aiming to provide a scientific basis for estimation of total mangrove carbon stocks. Results The average above-ground carbon stock in each region was sizeable (ranging from 12.0 to 150.2 Mg/ha), but average below-ground carbon stock was dominant (ranging from 46.6 to 388.6 Mg/ha), accounting for 69–91% of total carbon stock at the sites studied in China. Significant positive relationships were found between above-ground and below-ground mangrove carbon stocks, with the best fitting equation as BGC = 1.58 * AGC + 81.06 (Mg/ha, R2 = 0.62, p < 0.01, n = 122) for China. Such linear relationships vary for mangrove forests of different types and locations, from different geographical regions in China to other countries worldwide. Conclusion The positive relationship we found between above- and below-ground carbon stocks of mangrove forests in China and worldwide can facilitate more accurate assessments of mangrove blue carbon stocks at regional or global scales using modern techniques including remote sensing.

【 授权许可】

Unknown