Increased ecosystem carbon accumulation despite unimodal soil organic carbon patterns with stand age across afforested mangroves in Bangladesh
バングラデシュの植林マングローブにおける林齢に伴う土壌有機炭素パターンの単峰性にもかかわらず増加する生態系炭素蓄積 (AI 翻訳)
Md Lokman Hossain, Khusnur Jahan Shapna, Jianfeng Li, Carl Beierkuhnlein, Yaqub Ali, Tapos Kormoker, Jahirul Islam, Derrick Yuk Fo Lai
🤖 gxceed AI 要約
日本語
バングラデシュの6つの沿岸島における植林マングローブ（Sonneratia apetala）の林齢12～44年の調査で、植生炭素（VC）と生態系炭素（EC）密度は最古齢（44年）で最大（247 t/ha、461 t/ha）となった。一方、土壌有機炭素（SOC）密度は26年生でピーク（195 t/ha）に達した後、減少する単峰パターンを示した。これは老齢林での深根による下層土への炭素配分増加が原因と推定され、長期的なブルーカーボン貯留能評価には深層土壌の調査が必要である。
English
This study assessed vegetation carbon (VC), soil organic carbon (SOC), and ecosystem carbon (EC) densities across five stand ages (12–44 years) of afforested Sonneratia apetala mangroves in Bangladesh. VC and EC densities peaked in the oldest stand (247 and 461 t/ha, respectively), while SOC density showed a unimodal pattern, rising to 195 t/ha at 26 years then declining. The decline in older stands is attributed to deeper root allocation. Findings highlight age-driven carbon allocation shifts and the potential of mangrove afforestation for long-term blue carbon storage, emphasizing the need for deeper soil carbon studies.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本ではブルーカーボン生態系としてマングローブに注目が集まり、沖縄などで植林が進む。本知見は、植林後の炭素蓄積動態や林齢管理の重要性を示し、JCMや自治体のブルーカーボン評価に資する。
In the global GX context
This paper provides empirical evidence on carbon accumulation dynamics in afforested mangroves, relevant to global blue carbon offset projects and nature-based climate solutions. It underscores the need for age-specific carbon accounting and deeper soil sampling, informing methodologies for carbon crediting under frameworks like the Paris Agreement.
👥 読者別の含意
🔬研究者:Provides robust field data on carbon allocation shifts with stand age, informing carbon cycle models and forest management.
🏢実務担当者:Useful for companies investing in mangrove afforestation for carbon offsets, highlighting the importance of stand age and deep soil carbon.
🏛政策担当者:Supports inclusion of afforested mangroves in national greenhouse gas inventories and blue carbon strategies by demonstrating long-term carbon storage potential.
📄 Abstract（原文）
Mangroves are crucial coastal ecosystems that safeguard shorelines and store large amounts of carbon. This study assessed the dynamics of vegetation carbon (VC), soil organic carbon (SOC), and ecosystem carbon (EC) densities across five stand ages (12–44 years) of Sonneratia apetala plantations on six coastal islands in Bangladesh. Results revealed pronounced age-dependent shifts: VC (247 t ha -1 ) and EC (461 t ha -1 ) densities were highest in the oldest stand (44 years). In contrast, SOC density showed a unimodal pattern with stand age, rising from 105 t ha -1 in the 12-year-old stand to a peak of 195 t ha -1 in the 26-year-old stand before declining in the older stands. The rate of VC density increase was greatest (13.17 t ha -1 yr -1 ) in the 18-year-old stand. However, the accumulation rates of SOC density (6.39 17 t ha -1 yr -1 ) and EC density (19.79 t ha -1 yr -1 ) peaked in the 26-year-old stand. The initial rise in SOC density (0-60 cm depth) reflected high litter and root activity in the middle-aged stands, while the later decline in SOC density was likely a result of greater allocation of belowground carbon to the lower soil horizons in the older stands with deep roots. These findings reveal age-driven carbon allocation shifts and underscore the potential of S. apetala afforestation in enhancing the long-term blue carbon storage in coastal zones. This study highlights the need for more widespread afforestation in S. apetala to enhance carbon storage, and further investigations of SOC dynamics in deeper soil layers to fully assess the carbon sequestration potential of S. apetala plantations, especially in the older stands.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.envres.2026.124915first seen 2026-06-18 05:38:46
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