INFLUENCE OF OYSTER FARMING ON CHEMICAL COMPOSITION OF PARTICULATE ORGANIC MATTER AND OXYGEN CONSUMPTION RATE IN SEA WATER

• KAWAHATA Tatsuya

  東北大学大学院 工学研究科

• FUJIBAYASHI Megumu

  秋田県立大学 生物資源科学部

• YUGAMI Yohei

  東北大学大学院 工学研究科

• NISHIMURA Osamu

  東北大学大学院 工学研究科

• SAKAMAKI Takashi

  東北大学大学院 工学研究科

Bibliographic Information

Other Title

• 海水中粒状有機物の化学組成と酸素消費に及ぼすカキ養殖場の影響
• カイスイチュウ リュウジョウ ユウキブツ ノ カガク ソセイ ト サンソ ショウヒ ニ オヨボス カキ ヨウショクジョウ ノ エイキョウ

Abstract

 Hypoxia in bottom water has been a major environmental problem in inner bays. To conserve coastal marine ecosystems, it is necessary to enhance understanding of effects of human activities including aquacultures on material dynamics linking with hypoxia formation. To understand effects of oyster farming on the dynamics of particulate organic matter (POM) and potentials formation of the hypoxia in bottom water, biochemical compositions and oxygen consumption rate of POM were examined in Shizugawa Bay of northeastern Japan. We analyzed POM for fatty acid markers to evaluate the relative contributions of POM with various biological origins. The effects of oyster farms were evaluated by comparing compositions of POM between inside and outside oyster farms. Our results showed that in summer the oxygen consumption rate of POM was greater compared with the other seasons and also positively related to the content of algal fatty acid markers. POM derived from algal blooms in spring to summer seasons may be attributable to the higher oxygen consumption rates. Inside the oyster farms, the proportion of algal fatty acid markers was generally lower, and the degradability of suspended POM was considered to be lower. The relationship between bacterial fatty acid markers and oxygen consumption was also weaker in the farms. The present study supports a potential use of fatty acid markers for estimating the major origins of POM contribute to the oxygen consumption.

Journal

• Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)

  Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 74 (7), III_63-III_71, 2018

  Japan Society of Civil Engineers

Keywords

• oyster farm
• phytoplankton
• oxygen depletion
• fatty acid marker

Details

• CRID: 1390001288143276672
• NII Article ID: 130007627351
• ISSN: 13415115
• ISSN: 21856648
• ISSN: http://id.crossref.org/issn/21856648
• DOI: 10.2208/jscejer.74.iii_63
• NDL BIB ID: 032621207
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I032621207
• Web Site: https://www.jstage.jst.go.jp/article/jscejer/74/7/74_III_63/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed