Analysis of factors controlling responses of an aquatic microcosm to organic loading

Shuichi Shikano, Yasushi Kurihara

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


The changes in the numbers of individuals of the constituent species and ammonia concentrations in 6 subsystems (Bacteria, bacteria-Cyclidium, bacteria-Aeolosoma, bacteria-Chlorella, bacteria-Cyclidium-Chlorella, bacteria-Aeolosoma-Chlorella) of an aquatic microcosm were examined after the addition of organic substance (peptone) at both the young and mature stages of succession. Organic loading led to decreases in the numbers of bacteria and Aeolosoma after temporary increases in their numbers and an oscillation in the numbers of Cyclidium but the densities of these populations were maintained at constant values in the presence of Chlorella. When organic substance was added at a young stage where the photosynthetic activities of algae were high, invertebrates, especially Aeolosoma, were damaged by unionized ammonia which was formed as the pH value increased. In contrast, organic loading at the mature stage enhanced the population densities and biomasses of all constituent species.

Original languageEnglish
Pages (from-to)251-257
Number of pages7
Issue number2
Publication statusPublished - 1988 Nov 1


  • Aeolosoma
  • Chlorella
  • Cyclidium
  • aquatic microcosm
  • organic loading

ASJC Scopus subject areas

  • Aquatic Science


Dive into the research topics of 'Analysis of factors controlling responses of an aquatic microcosm to organic loading'. Together they form a unique fingerprint.

Cite this