Field Observation of Particle Organic Matter around the Artificial Upwelling Producing Structure

Takahiro OKANO; Hiroshi YAGI; Akiyoshi NAKAYAMA; Kumiko ADACHI; Masanori TAKEDA; Shigenori MATSUMURA; Takamasa TAKAGI; Junichi ITO; Hiroshi OGAWA

doi:10.2208/kaigan.66.1401

Abstract

Recently, the quantitative evaluation in the effect of the primary production of the artificial upwelling producing structure is tried by using a primary ecosystem model. In this case, it is important to understand the sinking flux of the particle organic matter because of the supply of the organic matter to the structure neighborhood and the reproducibility verification of the model. Then, the field observation that used the sediment trap to understand the behavior of the particle organic matter was done for the artificial upwelling producing structure in Nagasaki Prefecture. As a result, the sinking flux tended to increase relatively in the sea area where the upwelling was generated. Moreover, the big zooplankton etc. that did not sink were contained in the sample in the sediment trap by the influence of the formalin solution by about 33 percent.

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