Biomonitaring of Waste Disposal Site. Appearance of Plankton in the Aerated Lagoon and Stabilization Ponds.

• MORI Shoichi

  Mori Institute of Ecology Co., Ltd.

Bibliographic Information

Other Title

• 埋立管理とバイオモニタリング　高率酸化池と安定化池における浮遊生物の出現状況

Abstract

Planktons of the aerated lagoon were studied and their ecological structure assessed. Only a few genera of these plankton were dominant. Phytoplankton (especially Bacillariophyceae), mostly abundant in summer, decreased with drop of temperature. The number of Rotatoria and Cillata varied with phytoplankton and bacteria biomasses.<BR>In order to elucidate the process of wastewater eutrophication, water quality and phytoplankton at the stabilization ponds of a dredged solid waste disposal site were investigated within a period of five years (from 1983 to 1987) . The ponds were characterized by an eutrophication which made it possible for the phytoplanktons to always be present in a number varying from 10³ to 10⁵ (low in winter and summer, high in spring and autumn) . Vertical distribution, as measured 8 times from 1984 to 1987, showed that the amounts of chlorophyll-a and that of pheophytin and p-COD were uniformly distributed along the depth investigated. However, more concentrated zones were observed at a depth of above 1.5 m. These data indicate that dead cells of phytoplankton are more decomposed along the depth (especially in the upper layer) . Also, Nitrogen-Phosphorus (N-P) is generated along the depth where phytoplanktons are decomposed and produced. Zooplankton numbered from one inds./l to 10⁴ inds./l and were more numerous from spring to summer. Brachionus plicatilis was dominant and Apocyclops japonensis, copepodid of Apocyclops, nauplius of Copepoda were abundant.

Journal

• Waste Management Research

  Waste Management Research 6 (4), 310-321, 1995

  Japan Society of Material Cycles and Waste Management

Keywords

• plankton
• aerated lagoon
• stabilization pond
• seasonal change
• vertical distribution

Details

• CRID: 1390001204416230400
• NII Article ID: 10002052030
• NII Book ID: AN10414674
• DOI: 10.3985/wmr.6.310
• ISSN: 18838960
• ISSN: 09170855
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed