大阪湾北東部における珪藻遺骸の水平分布

• 廣瀬 孝太郎

  大阪市立大学理学研究科生物地球系専攻

• 後藤 敏一

  近畿大学医学部基礎医学部門研究室

書誌事項

タイトル別名

• Horizontal distribution of diatom remains in the northeastern part of Osaka Bay
• オオサカワン ホクトウブ ニ オケル ケイソウ イガイ ノ スイヘイ ブンプ

抄録

We investigated the recent diatom assemblages in 30 surface sediment samples from Osaka Bay, Japan, with the identified diatoms divided into five categories [halobious system ; Oligoeuryhaline Polyhalobous (OPH), Euryhaline Polyhalobous (EPH), Mesohalobous (MEH), Euryhaline Oligohalobous (EOH) and Stenohaline Oligohalobous (SOH)] based on their tolerance for salinity. The horizontal distribution pattern of each category suggested that the recent diatom distribution pattern of the bay is mainly controlled by the transportation of brackish/freshwater species from the mouth of the Yodo River through the river-water discharge into the bay. In other words, the distance from the river mouth controls the relative abundance of brackish/freshwater species at each site, which is a major part of the total floral composition and could be a useful paleoecological indicator for river-water discharge. The distribution pattern of Chaetoceros resting spores suggests they have potential as a paleoecological indicator for anthropogenic environmental degradation in exploited embayments. Taphonomic processes of recent diatoms are also discussed.

収録刊行物

• Diatom

  Diatom 25 (0), 21-36, 2009

  日本珪藻学会

キーワード

• diatom assemblage
• distribution
• halobious system
• Osaka Bay
• resting spores
• surface sediments

詳細情報

• CRID: 1390001205502090496
• NII論文ID: 10029531041
• NII書誌ID: AA11130739
• DOI: 10.11464/diatom.25.21
• ISSN: 21868565
• ISSN: 09119310
• NDL書誌ID: 10545966
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10545966
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可