Horizontal Distribution and Budget of Biogenic Silica in the Surface Sediment of the Eastern Seto Inland Sea, Japan : Comparison with Total Organic Carbon, Total Nitrogen and Total Phosphorus Results

• Yamaguchi Hitomi

  愛媛大学沿岸環境科学研究センター

• Miyoshi Chikanori

  愛媛大学大学院理工学研究科

• Kuwae Michinobu

  愛媛大学上級研究員センター

• Tsugeki Narumi

  愛媛大学沿岸環境科学研究センター

• Takeoka Hidetaka

  愛媛大学沿岸環境科学研究センター

• Tada Kuninao

  香川大学農学部

Bibliographic Information

Other Title

• 東部瀬戸内海の表層堆積物における生物起源珪素の分布と収支： 全有機態炭素・全窒素・全リンとの比較
• トウブ セトナイカイ ノ ヒョウソウ タイセキブツ ニ オケル セイブツ キゲン ケイソ ノ ブンプ ト シュウシ ゼン ユウキタイ タンソ ゼン チッソ ゼン リン ト ノ ヒカク

Abstract

We determined biogenic silica（BSi）content and estimated the Si budget within surface sediments（０－１０mm）of the eastern Seto Inland Sea, Japan, together with total organic carbon（TOC）, total nitrogen（TN）and total phosphorus（TP）. The BSi content determined by the DeMaster's technique ranged between２．０２and２４．８mg Si g－１, with a mean（±S. D.）value of１１．６ ± ７．４mg Si g－１（n＝２５）. The horizontal distribution of BSi in the area was related to that of TOC, TN and TP, and significantly correlated with the water content in the sediment（r＝０．８７５）. This indicates that the level of BSi content is influenced by the sediment characteristics, and the horizontal distribution of BSi reflects the re-distribution of fine particles as a result of hydrodynamic processes, as well as the amount of the phytoplankton in the overlying water column. The deposition rate of BSi, TOC, TN and TP from the water column to the surface sediment through biological activities in Osaka Bay-Harima Nada Area, a major part of the eastern Seto Inland Sea, is estimated to be １０．３×１０４t Si yr－１, １１．７×１０４t C yr－１, １．４１×１０４t N yr－１ and０．２６×１０４t P yr－１, respectively. It was also found that the accumulation rate of BSi, TOC, TN and TP in the surface sediments accounts for ２８％, ７．２％, ４．９％ and ６．７％ of Si, C, N and P production by phytoplankton in the same area, respectively. These results suggest that most particulate carbon, nitrogen and phosphorus produced by phytoplankton in the eastern Seto Inland Sea is transported to the outer area through water exchange whereas, in the case of particulate silica, sediment acts as a major sink.

Journal

• Bulletin on Coastal Oceanography

  Bulletin on Coastal Oceanography 49 (1), 69-77, 2011

  Coastal Oceanography Research Committee, the Oceanographic Society of Japan

Keywords

• 炭素
• 窒素
• リン
• 生物起源珪素
• 堆積物
• 東部瀬戸内海

Details

• CRID: 1390846609804228864
• NII Article ID: 110009490275
• NII Book ID: AN10492259
• DOI: 10.32142/engankaiyo.49.1_69
• ISSN: 24344036
• ISSN: 09143882
• ISSN: 13422758
• NDL BIB ID: 11249417
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11249417
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10578318
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • NDL-Digital
  • CiNii Articles
  • KAKEN
  • Crossref
• Abstract License Flag: Disallowed