Dynamics of bacterioplankton during a phytoplankton bloom in the high arctic waters of the Franz-Joseph land archipelago
- Author(s)
- Gerald Müller-Niklas, Gerhard J. Herndl
- Abstract
Bacterial abundance and activity were followed during a phytoplankton bloom in the high Arctic, the Franz-Joseph Land archipelago (80° to 82° N, 45° to 65° E), in July 1995. At the beginning of July the sea was entirely covered by ice; at the end of July the ice coverage was about 50 %. Water temperature varied between -1 and -0.6°C and salinity between 32 and 35 ‰. Phytoplankton cells exhibited photoinhibition even during incubation periods when maximum radiation was <400 μE m-2 s-1, indicating adaption to a low radiation level. Phytoplankton biomass, averaged over all 5 sampling sites, was 2.2 μg chl a l-1; primary production, at the 50 % radiation level, was 27.3 μg C l-1 d-1 and mean bacterial abundance was 3.6 × 105 ml-1 Mean bacterial production as measured by thymidine incorporation was 2.46 μg C l-1 d-1 while for leucine incorporation it was 5.46 μg C l-1 d-1. Total organic carbon varied over a narrow range (0.81 to 1.12 mg l-1). Pronounced spatial variations in microbial parameters between waters surrounding different islands were detectable. At Hayes Island phytoplankton biomass and production decreased within 3 wk while bacterial abundance and activity measured as thymidine and leucine incorporation increased. During this period the percentage of bacterial (as measured by leucine incorporation) to primary production increased from about 3 % to more than 95 % and the calculated total organic carbon turnover decreased from 258 to 28 d.
- Organisation(s)
- External organisation(s)
- Universität Wien
- Journal
- Aquatic Microbial Ecology
- Volume
- 11
- Pages
- 111-118
- No. of pages
- 8
- ISSN
- 0948-3055
- DOI
- https://doi.org/10.3354/ame011111
- Publication date
- 11-1996
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 106021 Marine biology
- Keywords
- ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics, Aquatic Science
- Sustainable Development Goals
- SDG 14 - Life Below Water
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/dynamics-of-bacterioplankton-during-a-phytoplankton-bloom-in-the-high-arctic-waters-of-the-franzjoseph-land-archipelago(de3b6ead-cd4f-4bf2-97da-bed4abb5de42).html