open access

https://hdl.handle.net/2115/52983

Occurrence of Chattonella Red Tide and Distribution of Marine Bacteria in Harima-Nada of the Seto Inland Sea in Summer

日本語

Seto Inland Sea

2013-07-29

北海道大学大学院水産科学研究院

北海道大学水産科学研究彙報

63(2)

7-11

The noxious raphidophytes Chattonella spp. and the total numbers of marine bacteria were investigated in Harima-Nada, the Seto Inland Sea, Japan, during the summer of 1989. A red tide of Chattonella occurred in this summer (August). Observed densities of the total number of bacteria (0.50×106～4.16×106 cells mL-1) revealed values observed in common coastal waters in Japan in enbayments of such as the Seto Inland Sea. A peak of Chattonella red tide (about 1,000 cells mL-1) was observed on August 7 and the cells almost disappeared within 1 week, and the total number of bacteria showed the maximum value of 4.16× 106 cells mL-1 at the 10 m depth on August 14. It was suggested that cells of Chattonella red tide were killed by algicidal bacteria after the population peak of Chattonella and resultant organic matters were utilized by heterotrophic bacteria that accompanied the maximum value of bacterial cell density. It is considered that microbial loop worked after the decay of Chattonella red tide via algicidal bacteria, total heterotrophic bacteria and heterotrophic nanofl agellates, etc.

紀要論文

Version of Record

1346-1842

AA11547977