書誌事項
- タイトル別名
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- Investigation on coral necrosis in massive <i>Porites</i> colony in the Mouth of Todoroki river, Ishigaki Island, Japan deduced from the δ<sup>18</sup>O, δ<sup>13</sup>C and Mn/Ca ratios
- 酸素・炭素安定同位体比・Mn/Ca比を用いた石垣島ハマサンゴの壊死研究
- サンソ タンソ アンテイ ドウイタイヒ Mn Caヒ オ モチイタ イシガキジマ ハマサンゴ ノ エシ ケンキュウ
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抄録
Coral reefs are increasingly faced to the crisis of decline and death caused by climate changes and anthropogenic influence. These crises were reported in Shiraho coral reefs, the Ishigaki Island, Southwestern Japan, caused by the red soils runoff through the Todoroki River. In order to evaluate the influence of terrestrial inputs on coral skeletal growth and coral death, we have analyzed oxygen and carbon isotopic ratios, as well as Mn/Ca ratio, of coral Porites, skeleton collected from Shiraho reef. The coral colony used in this study was still alive but partly dead when the samples were recovered in 20th September 2006. Oxygen isotopic profile of necrosis part indicates that the death may have occurred in winter 2005 when a strongly positive peak of Mn/Ca ratio was observed in the same growth layer of living part, suggesting that increased terrestrial input during sugar cane harvest and closed water system during lower tide level in winter are a possible cause of coral necrosis in the Shiraho coral reefs.
収録刊行物
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- 地球化学
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地球化学 43 (1), 35-42, 2009-03-30
一般社団法人日本地球化学会
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詳細情報 詳細情報について
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- CRID
- 1390282680719131904
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- NII論文ID
- 120005451579
- 110009442247
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- NII書誌ID
- AN00141280
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- ISSN
- 21885923
- 03864073
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- HANDLE
- 2115/56467
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- NDL書誌ID
- 10271960
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- IRDB
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
