論文

査読有り
2003年10月

Fluxes of amino acid and hexosamine in sinking particles in subarctic and arctic coastal regions

JOURNAL OF OCEANOGRAPHY
  • S Hashimoto
  • ,
  • Y Maita

59
5
開始ページ
731
終了ページ
738
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1023/B:JOCE.0000009601.57331.b3
出版者・発行元
TERRA SCIENTIFIC PUBL CO

Spatial and temporal variations in the vertical fluxes of amino acids and hexosamine were studied at coastal sites in the south of the Chukchi Sea, Otsuchi Bay, and the center and the entrance of Funka Bay. Amino acid fluxes were higher in the upper trap than in the lower trap material, but hexosamine fluxes were opposite to amino acid fluxes. The ratios between protein amino acids (Asp, Glu and Arg) and their decomposition products (beta-Ala, gamma-Aba and Orn) indicate that the labile organic matter was more abundant in the upper traps than in the lower ones and increased during periods of enhanced amino acid fluxes. The ratios of Ser/Gly did not vary temporally and spatially and were nearly constant, indicating that Ser and Gly were preserved in a stable form within sinking particles. Hexosamine/amino acid ratios of these particles were higher in the lower sediment trap than in the upper trap material. This implies that the sinking particles derived from zooplankton are relatively more abundant in deep layers than in the surface layer in the water column. We suggest that the difference in amino acid flux and the composition between the upper and lower trap material is influenced by the processes of microbial decomposition and zooplankton consumption of sinking particulate organic matter.

Web of Science ® 被引用回数 : 1

リンク情報
DOI
https://doi.org/10.1023/B:JOCE.0000009601.57331.b3
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000184939700019&DestApp=WOS_CPL

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