Creator/Principal investigator(s)
Björn Andersson
- University of Gothenburg, Department of Marine Sciences
Helena L Filipsson
- Lund University, Department of Geology
Karin Rengefors
- Lund University, Department of Biology
Olga Kourtchenko - University of Gothenburg, Department of Marine Sciences
Kerstin Johannesson
- University of Gothenburg, Department of Marine Sciences
Description
The data contains sediment core measurements from two locations in the Baltic Sea. The aim of the study was to determine if the age of phytoplankton resting stages could be determined based on their vertical position or if contamination from surface population was a major confounding factor. To this end, the concentration of seven abundant species of diatoms and cyanobacteria were enumerated using the Most Probable Number (MPN) approach. Sediment sections were dated using standard radiometric methods, and surface sediment contamination was quantified using 4.5 μm microsphere tracers. Furthermore, ex-situ longevity was monitored over four years and decreased substantially withing this timeframe. In the cores, microspheres (>2×10^-6 fractions) were translocated from the sediment surface and could well explain the vertical distributions and abundances of viable cells (between ~106 to <0.8 g sediment^-1). Our conclusion was therefore that there are substantial contamination risks, and that age determination of resting stages using only radiometric age determination of bulk sediment is flawed witho
... Show more..Language
English
Research principal
Responsible department/unit
Department of Marine Sciences
Other research principals
Funding
-
Funding agency:
Swedish Research Council for Environment Agricultural Sciences and Spatial Planning
- Funding agency's reference number: 2016-00594
- Project name on the application: Sedimentet berättar: Hur har växtplanktonpopulationer anpassats till miljögifter under de senaste 150 åren?
Data contains personal data
No
Time period(s) investigated
2017-06-27 – 2021-09-16
Species and taxons
skeletonema marioni
thallasiosira baltica
chaetoceros spp
dolichospermum spp
naviculoids
amphoroids
nodularia spumigena
fragilariopsis spp
Geographic spread
Geographic location: Östergötland County, Kalmar County, Baltic Sea
Geographic description: Between the 27-28th of June 2017 two semi-enclosed inlets, Gropviken (GP17; 58°19.92N 16°42.35'E) and Gåsfjärden (VG17; 57°34.35'N 16°34.98'E), were sampled. On the 22nd of September 2020, Gåsfjärden (VG20; N 57°34.38’, E 16°35.43’) was revisited 500 m east of VG17
Research area
Environmental Sciences, Geology, Microbiology, Ecology
(The Swedish standard of fields of research 2011)
Biota, Geoscientific Information, Oceans
(INSPIRE topic categories)
Andersson, B., K. Rengefors, O. Kourtchenko, K. Johannesson, O. Berglund, and H. L. Filipsson. Cross-contamination risks in sediment-based resurrection studies of phytoplankton. Limnology and Oceanography Letters, in press.
:
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Associated documentation
Description
The study design consisted of two field expeditions (2017 and 2020) where six to ten, 50 cm cores were collected. Cores were inspected for signs of damage and preservation of laminated patterns, and the best cores were selected for further analysis. Selected cores were section onboard for bulk radiometric dating (210Pb and 137Cs) and Total Organic Carbon (TOC) and Nitrogen (TN) profiles. MPN enumeration of diatom and cyanobacterial resting stages was performed on cores transported intact to Goth
... Show more..Version 1
https://doi.org/10.5878/9y59-7a50
Citation
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Data format / data structure
Numeric
Creator/Principal investigator(s)
Björn Andersson
- University of Gothenburg, Department of Marine Sciences
Karin Rengefors
- Lund University, Department of Biology
Olga Kourtchenko - University of Gothenburg, Department of Marine Sciences
Kerstin Johannesson
- University of Gothenburg, Department of Marine Sciences
Olof Berglund
- Lund University, Department of Biology
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