Annual Journal of Civil Engineering in the Ocean Vol.35
STUDY ON ORGANIC MATTER DECOMPOSITION BY ATTACHED ORGANISMS ON OYSTER SHELL IN NISHIKINOHAMA OF OSAKA BAY
2019 Volume 75 Issue 2 Pages I_480-I_485
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2019 Volume 75 Issue 2 Pages I_480-I_485
The object of this study was to reveal the role of attached organisms on oyster shell in Osaka Bay. In this study, we focused and clarified quantitatively organic matter decomposition by attached organisms on oyster shell. Attached organism carbon weight of animals and microorganisms were 1.3-67.6 gC/m2 and 2.0-47 gC/m2, respectively. Oxygen consumption rate by attached organisms on oyster shell by dark chamber method was 4.59-239 mgO2/m2 /hour. Oxygen consumption rate of microorganisms occupied 47-97% in all oxygen consumption. Oxygen consumption rate by attached organisms on oyster shell was 2.45 times higher than that with respiration. In addition, the oxygen consumption rate by the attached organic matter was 5.63 times higher than that of the attached animal. It was found that oyster shells provided habitat to attached organisms to promote the organic matter decomposition.
