2005 Fiscal Year Final Research Report Summary
Evaluation of the carbon fixation and organic matter decomposition functions in natural mangrove forests
| Project/Area Number |
14255011
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
林学
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| Research Institution | Forestry and Forest Products Research Institute |
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Principal Investigator |
TABUCHI Ryuichi Forestry and Forest Products Research Institute (FFPRI), Tama Science Garden, Group leader, 多摩森林科学園, グループ長 (30343784)
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| Co-Investigator(Kenkyū-buntansha) |
FUJIMOTO Kiyoshi Nanzan University, Fac.Of General policy, Professor, 総合政策学部, 教授 (50329752)
MOCHIDA Ukira Yokohama National University, Fac.of Human Education Science, Professor, 教育人間科学部, 教授 (60133047)
HIRAIDE Masakazu FFPRI, Fungi and Microorganism research section, Senior Researcher, きのこ・微生物研究領域, 主任研究官 (20353823)
ONO Kenji FFPRI, Soil research section, Researcher, 立地環境研究領域, 研究員 (30353634)
HIRATA Yasumasa FFPRI, Shikoku Research Center, Group leader, 四国支所, グループ長 (50353826)
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| Project Period (FY) |
2002 – 2005
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| Keywords | mangrove forest / carbon stock / carbon accumulation rate / forest type classification / peat deposit by forest type / litter decomposition process / mapping of mangrove carbon stock / satellite image analysis |
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| Research Abstract |
We studied on the capacity, function and process of carbon sequestration by mangrove forests in Pohnpei Island, Micronesia, and applied satellite image analysis for area based evaluation of carbon stock by mangroves. Three main mangrove vegetation types were identified by phyto-sociological analysis i.e. pioneer Rhizophora stylosa community and Sonneratia alba community with dense stilt root or pneumatopher both found in narrow zone along shore as well as vast Rhizophora apiculata - Bruguiera gymnorrhiza community. The estimated age of each type was less than 400 years for pioneer stand with shallow deposit of mangrove peat as 0-0.5m in depth while major type was estimated as ca, 1700 years owing to 1 to 2 m deep peat deposit. Standing biomass was estimated as ca. 560 ton/ha for mangroves established on coral reef and as ca. 700 ton/ha for estuary riverine mangrove. Standing carbon stocks were estimated between 160 to 300 ton C/ha and fixation rate was estimated 0 to 3 ton C/ha annually. Most belowground carbon sequestration was made of peat accumulation and the contribution of small litter was negligible. Belowground peat deposit was, very huge as ca. 2000 ton C/ha. We recognized the importance of large canopy gap occurrence for regeneration through precise monitoring. The process and agents concerning to wood decomposition were also studied and their tolerance to severe conditions was found. Then we detected forest types and evaluated carbon stocks by each type of mangrove over whole Pohnpei Island.
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[Journal Article] The rehabilitation of mangroves in Southeast Asia2004
Author(s)
Tabuchi R.
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Journal Title
Proceedings : International Symposium Alternative Approaches to Enhancing Small-Scale Livelihoods and Natural Resources Management in Marginal Areas-Experience in Monsoon Asia -. (United Nation Univ.Press)(239pp) 239nn.CD-ROM version
Pages: 121-127
Description
「研究成果報告書概要(欧文)」より
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