Ecological Impact Assessment of the Biomanipulation by the Predator Introduction in Microcosm

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  • <b>マイクロコズムにおける捕食者導入によるバイオマニピュレーションの生態系影響評</b><b>価 </b>
  • マイクロコズムにおける捕食者導入によるバイオマニピュレーションの生態系影響評価
  • マイクロコズム ニ オケル ホショクシャ ドウニュウ ニ ヨル バイオマニピュレーション ノ セイタイケイ エイキョウ ヒョウカ

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Abstract

This experiment was carried out to investigate the basic ecosystemic impact statement of he water quality improvement of the biomanipulation. It performed the basic environmental ssessment which focused its attention on an ecosystem function as P/R ratio using microcosm. The icrocosm system was made from micro animals as producer, micro alga as predator and bacteria as ecomposer. In this experiment, Aeolosoma hemprichi (top predator) and Cyclidium glaucoma primary predator) were introduced into microcosm as the introduced species for bioremediation. As esults, Chlorella sp. and Scenedesmus sp. decreased in the flask which introduced Aeolosoma emprichi. But, they didn't decrease in the flask which introduced Cyclidium glaucoma. The top redator may keep a proper population of the micro alga. In the case of top predator introduction, a ossibility that could solve water-bloom was demonstrated.

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