Abstract
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 153:59-66 (1997) - doi:10.3354/meps153059 Bacterial carbon production in the northern Baltic: a comparison of thymidine incorporation and FDC based methods Tuomi P Bacterial production in the open Gulf of Finland was estimated by 3H-thymidine incorporation rate (TTI) and by the frequency of dividing cells (FDC), counted by transmission electron microscopy (TEM). To relate TTI and FDC to bacterial growth rate, batch cultures with the natural bacterial community from the study area were used. Conversion factors between 0.2 and 7.2 x 1018 cells mol-1 TdR, or 0.3 and 24.3 x 1017 µm3 mol-1 TdR, were obtained for TTI, depending on the season and calculation model used (integrative, cumulative, or modified derivative). From FDC and growth rate (µ) based on bacterial cell numbers, the following equation was derived: µ = 0.002FDC - 0.001. Bacterial carbon production in the study area, estimated using the FDC method, was 20 to 80% higher than TTI-based estimates. Virus abundances were followed in the batch cultures and in the field study. Viral lysis may have been a significant cause of bacterial mortality in the field, but it remains to be shown whether viral-induced mortality was already included in the empirical conversion factor. Bacteria · 3H-thymidine incorporation rate · Frequency of dividing cells · Baltic Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 153. Publication date: July 10, 1997 Print ISSN:0171-8630; Online ISSN:1616-1599 Copyright © 1997 Inter-Research.
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