第四紀後期の海洋環境と生物生産　　古環境を復元する指標としてのバイオマーカー　太平洋における深海底堆積物を例として

• 大河内 直彦

  北海道大学低温科学研究所

• 河村 公隆

  北海道大学低温科学研究所

書誌事項

タイトル別名

• Environments of Ocean and Primary Productivity during the Late Quaternary. Biomarkers as Tools for Reconstructing Paleoenvironments.
• コカンキョウ オ フクゲンスル シヒョウ トシテノ バイオマーカー タイヘイヨ
• 太平洋における深海底堆積物を例として

抄録

We present analytical results of organic compounds in the deep sea sediments recovered from the Central Pacific and the western tropical Pacific and describe recent progresses in sedimentary biomolecules as tools for reconstructing paleoenviroments. Biomolecules derived from terrestrial higher plants such as C₂₅-C₃₅ n-alkanes, C₂₄-C₂₈ fatty alcohols, or C₂₃-C₃₄ fatty acids in the surface sediments from 175° E transect show high concentrations in the higher latitudes in the Northern Hemisphere. Relative abundances of these terrestrial biomarkers are markedly different between low (15°N-15°S) and high (48°N-19°N) latitudes. Such a difference could be interpreted in terms of different wind regimes between the two areas. Unsaturation degree of long-chain alkenones (U^k₃₇) derived from haptophyte algae suggests that sea surface temperature in the western tropical Pacific during the last glacial maximum was nearly the same as that of the present. We also found that the alkenone abundances over the last 20 kyr are anti-correlated with sedimentary nitrogen isotopic ratios, suggesting that a production rate of alkenones by haptophyte algae is controlled by the nutritional state of the algae.

収録刊行物

• 地学雑誌

  地学雑誌 107 (2), 189-202, 1998

  公益社団法人 東京地学協会

キーワード

• バイオマーカー
• 堆積物
• 高等植物
• U<SUP>k</SUP><SUB>37</SUB>
• 最終氷期

詳細情報

• CRID: 1390001204230130688
• NII論文ID: 10002237496
• NII書誌ID: AN00322536
• DOI: 10.5026/jgeography.107.2_189
• ISSN: 18840884
• ISSN: 0022135X
• NDL書誌ID: 4480488
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4480488
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可