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보문 : 13C, 15N 추적자 실험을 통한 부유 수생식물(Iris pseudoacorus)의 Cyanobacteria(Microcystis aeruginosa) 성장억제능력 평가
김민섭 ( Min Seob Kim ),이연정 ( Yeon Jung Lee ),김백호 ( Baik Ho Kim ),황순진 ( Soon Jin Hwang ),안광국 ( Kwang Guk An ),박선구 ( Sun Koo Park ),엄한용 ( Han Yong Ume ),신경훈 ( Kyung Hoon Shin ) 한국하천호수학회(구 한국육수학회) 2011 생태와 환경 Vol.44 No.3
Bottom-up approaches to control of Microcystis aeruginosa blooms were comparatively investigated through an in situ mesocosm experiment using aquatic plants (Iris pseudoacorus). In the mesocosm experiments, floating I. pseudoacorus, seemed to be effective in controlling massive M. aeruginosa blooms in an agricultural reservoir, exhibiting a close coupling with temporal variations in Chl-a and DO concentration. Shading by floating I. pseudoacorus resulted in a reduced phytoplankton abundance inhibiting light energy availability. Moreover, I. pseudoacorus may suppress phytoplankton growth through the excretion of chemical substances, likes a allelopathy, that inhibit phytoplankton photosynthetic activity The 15N atom % of I. pseudoacorus showed higher values than POM, suggesting that I. pseudoacorus assimilates DIN predominantly compared to phytoplankton, which was mostly M. aeruginosa. This result strongly suggests that the M. aeruginosa bloom should be regulated by aquatic plants, like I. pseudoacorus, this approach can affect zooplankton composition. This is the first study that has used stable isotope tracers to evaluate the biomanipulation efficiency through floating I. pseudoacorus.