Conservation of lake ecosystems by biological interactions

2015 Fiscal Year Final Research Report

• Project/Area Number: 25281044
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Modeling and technologies for environmental conservation and remediation
• Research Institution: Yokohama National University
• Principal Investigator: Itoh Kiminori 横浜国立大学, 環境情報研究科(研究院), 教授 (40114376)
• Co-Investigator(Kenkyū-buntansha): AMEMIYA TAKASHI 横浜国立大学, 環境情報研究院, 教授 (60344149)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 湖沼生態系 / 生物間相互作用 / ウキクサ / 根圏細菌群集 / クオラムセンシング

Outline of Final Research Achievements

Ecosystem modeling study and laboratory experiments were carried out for lake-ecosystem conservation. Analysis of the developed mathematical model showed that cyanobacteria can be reduced by bacteria living in the rhizosphere of duckweed without reducing loading of nutrient. Algicidal effects of the bacteria called quorum sensing was investigated by using yeast cells as a model organism. It was shown that yeast cells of high density exhibited high degree of synchronization of metabolism probably due to quorum sensing. Experiments using the PCR-DGGE methods revealed that at least one community of bacteria played a significant role in reducing cyanobacteria.

Free Research Field

環境計測科学