Changes in cell volume of bacteria and heterotrophic nanoflagellates in a hypereutrophic pond

• Published in: Hydrobiologia Vol. 428; no. 1-3; pp. 197 - 203
• Main Authors: NAKANO, S.-I, KAWABATA, Z
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer 15.06.2000; Springer Nature B.V
• Subjects: Animal, plant and microbial ecology; Bacteria; Biological and medical sciences; Correlation analysis; Freshwater; Fundamental and applied biological sciences. Psychology; Microbial ecology; Microbiology; Ponds; Various environments (extraatmospheric space, air, water); Asia; Japan; Freshwater environment; Pond; Food web; Heterotrophy; Bacteria; Nanoplankton; Cell volume; Microbial community; Population density
• ISSN: 0018-8158; 1573-5117
• DOI: 10.1023/a:1003971516725

Changes in cell volume of planktonic bacteria and heterotrophic nanoflagellates (HNF) were examined in a hypereutrophic pond from April to October, 1997. There were marked changes in the abundance of bacteria, HNF and ciliates and in protistan bacterivory during this period. The cell volume of free-living bacteria (0.121 ± 0.031 μm^sup 3^, mean ± SD) was large relative to that reported in the literature. The cell volumes of HNF was 71.1 ± 24.8 μm^sup 3^. Both cell volumes did not follow a seasonal trend. The dominant size class of bacteria was seasonally variable, whereas density of filamentous bacteria was relatively high between August and September. Biomass of filamentous bacteria accounted for up to 33.6% of total bacterial biomass. A correlation analysis for cell volume of bacteria and HNF, density of filamentous bacteria and some microbial variates was performed. The positive correlations detected (p<0.05) were between density of bacteria and cell volume of HNF, and between density of filamentous bacteria and cell volume of HNF.[PUBLICATION ABSTRACT]