Relationship between mangrove vegetation and micro-topography, and carbon storage of Kandelia candel (L.) Druce forests in Amami-ohshima Island, southwestern Japan

DOI Web Site 31 References
  • Ishihara Shuichi
    Graduate School of Environment and Information Sciences, Yokohama National University
  • Fujimoto Kiyoshi
    Faculty of Policy Studies, Nanzan University
  • Kawanishi Motohiro
    Graduate School of Environment and Information Sciences, Yokohama National University
  • Watanabe Ryo
    Graduate School of Technology, Yokohama National University:(Present office)Metocean Environment Inc
  • Tanaka Shinji
    Graduate School of of Agriculture, Gifu University:(Present office)Tyunou Region Rural Office, Gifu Prefectural Government

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Other Title
  • 奄美大島マングローブ林の植生と立地の関係およびメヒルギ林の炭素蓄積量
  • アマミ オオシマ マングローブリン ノ ショクセイ ト リッチ ノ カンケイ オヨビ メヒルギリン ノ タンソ チクセキリョウ

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Abstract

In order to clarify the relationship between mangrove vegetation and site environments, topographical and phytosociological surveys were carried out along the two belt transects at the mouth of Sumiyo and Yakukachi Rivers in Amami-ohshima Island. Additionally, we established three study plots to estimate above-ground and below-ground stored carbon. The results of the phytosociological procedures yielded three communities, i.e. Kandelia candel community and Bruguiera gymnorrhiza community in the mangrove forests, and Heritiera littoralis community in the back mangrove forests. In the K. candel community, typical under community was found along the fringe of river, and B. gymnorrhiza under community was found on the delta. In the B. gymnorrhiza community, typical under community was found on the delta, and Excoecaria agallocha under community was found on the mounds of mud lobster in tidal zone. Heritiera littoralis community was found on the mounds above tidal zone. It was found that the distribution of communities have close correspondence with landform units in micro scale. The distribution range along water level of K. candel was lower than that of B. gymnorrhiza. Above-ground stored carbon of the K. candel forests was estimated to be 23.5±11.7tC/ha, which is 10 to 20% of tropical mangrove forests. Below-ground one up to 70cm in depth was estimated to be 104.0±7.1tC/ha, which is 20 to 30% of Rhizophora forests. This shows that K. candel has greater carbon strage ability on the forest floor as well as other mangrove species.

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