河床付着微生物群集に対する部分殺菌処理の影響
EFFECTS OF PARTIAL STERILIZATION ON EPIBENTHIC MICROBIAL COMMUNITY OF RIVER BED

Yasunori WATANABE
1975 Nihon Seitai Gakkaishi  
The EcologicalSociety ofJapan Vol. 25, No. 2 JAPANESE JOVRNAL OFEcoLOGY June, 1975 EFFECTS OF PARTIAL S[E[ERILIZATION ON EPIBENTHIC INfiCROBIAL COMIN(IUNITY OF RIVER BED Yasur)ori WATANABE, Department ofBiokLgy, Flaculty ofSZ:ience, 7bkvo Metropolitan Uhiversity, Skitagaya-k", 7bdyo 158 ?fiIpttrgtwdetzptfi}Crd#4utS}gecarail#OueW ntRasszk\fl\sgitz#ty$ X pe ge tw SyrLQpsis WA rANABE, Yasunori CDep. Biol., Fac. Sci.,Tokyo Metrop. Univ., Tokyo). 1975. Effects ofpar- tial sterilization on epibenthic
more » ... mierobial community of river bed. Jap , J. Ecol., 25 : 53-60. Relationships between bacteria and predators, especially protozoa, were analysed using a laboratory model of an epibenthic microbial comnunity and partial steri!ization techniques. Heating at 450 to 650 C brought about an inci:ease in the number of bacteria in the microbial cQmmunity, The elimination of the predatory activity of protozoa was thought to be the cause of this phenomenon. In addition, an increase in the amount ef disselved nutrients oocuring incidenta11y due to heating, also influences the increase of bacteria. [[reatrnent with the surfhce active agent, Aerosolt OT, was also effbctive in eliminating protozoeq and brought abeut an in crease in the number of bacteria in the treated sample. The results of these experiments indicate that predation by protezoa may be one of the important fattors regulating the bacterial population ofsuchamicrobia1 conmiunity. The EcologicalSociety of Japan Vol. 25, No. 2
doi:10.18960/seitai.25.2_53 fatcat:pb5tbbef2vgbzhllghcc6lg7zi