Evaluation of carbon sequestration mechanism and potential by mangrove afforestation/reforestation

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K12261
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 64040:Social-ecological systems-related
• Research Institution: Kogakuin University
• Principal Investigator: SAKAI Yuji 工学院大学, 先進工学部, 准教授 (40361513)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: マングローブ / 植林/再植林 / ブルーカーボン生態系 / 生態系炭素貯留量 / 炭素貯留メカニズム / 土壌特性 / 化学量論比 / 温暖化対策技術

Outline of Final Research Achievements

Mangroves, called blue carbon ecosystems, have more efficient carbon storage than terrestrial forests. In particular, afforestation/reforestation of mangroves is effective as negative emission technologies for global warming mitigation. Therefore, measuring ecosystem carbon stocks in their sites is essential. However, there is a difference in ecosystem carbon stocks in different regions and many unsolved points exist about the mechanism of high carbon stock in soil. In this research, the ecosystem carbon stocks and soil properties in mangrove reforestation sites in abandoned shrimp ponds, new afforestation sites in new mudflat, and natural forests in Southeastern Thailand have been evaluated. Consequently, ecosystem carbon stocks at their sites increased gradually across the mangrove chronosequence. In addition, soil properties and stoichiometric ratios in afforestation/reforestation sites compared to natural forests indicated a relationship with the increase in soil carbon stocks.

Free Research Field

環境工学

Academic Significance and Societal Importance of the Research Achievements

ブルーカーボン生態系の中でも高い炭素貯留量を有するマングローブ生態系での植林、再植林の成功事例における炭素貯留量の精確な算出は温暖化対策技術として重要な知見である。また土壌中炭素貯留量及びメカニズムについては未解明な点も多く、学術的な意義を有する。マングローブ植林・再植林は、地球環境への貢献と地域環境保全だけでなく、生態系修復による地域産業や経済性の向上にも繋がるという社会的な意義も有する。