Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Abundance and biogeochemical impact of cable bacteria in Baltic Sea sediments
Hermans, M.; Lenstra, W.K.; Hidalgo-Martinez, S.; van Helmond, N.A.G.M.; Witbaard, R.; Meysman, F.J.R.; Gonzalez, S; Slomp, C.P. (2019). Abundance and biogeochemical impact of cable bacteria in Baltic Sea sediments. Environ. Sci. Technol. 53(13): 7494-7503. https://dx.doi.org/10.1021/acs.est.9b01665
In: Environmental Science and Technology. American Chemical Society: Easton. ISSN 0013-936X; e-ISSN 1520-5851, meer
|   |
| Auteurs | | Top |
- Hermans, M.
- Lenstra, W.K.
- Hidalgo-Martinez, S.
- van Helmond, N.A.G.M.
|
- Witbaard, R.
- Meysman, F.J.R.
- Gonzalez, S
- Slomp, C.P.
|
|
| Abstract |
Oxygen depletion in coastal waters may lead to release of toxic sulfide from sediments. Cable bacteria can limit sulfide release by promoting iron oxide formation in sediments. Currently, it is unknown how widespread this phenomenon is. Here, we assess the abundance, activity, and biogeochemical impact of cable bacteria at 12 Baltic Sea sites. Cable bacteria were mostly absent in sediments overlain by anoxic and sulfidic bottom waters, emphasizing their dependence on oxygen or nitrate as electron acceptors. At sites that were temporarily reoxygenated, cable bacterial densities were low. At seasonally hypoxic sites, cable bacterial densities correlated linearly with the supply of sulfide. The highest densities were observed at Gulf of Finland sites with high rates of sulfate reduction. Microelectrode profiles of sulfide, oxygen, and pH indicated low or no in situ cable bacteria activity at all sites. Reactivation occurred within 5 days upon incubation of an intact sediment core from the Gulf of Finland with aerated overlying water. We found no relationship between cable bacterial densities and macrofaunal abundances, salinity, or sediment organic carbon. Our geochemical data suggest that cable bacteria promote conversion of iron monosulfides to iron oxides in the Gulf of Finland in spring, possibly explaining why bottom waters in this highly eutrophic region rarely contain sulfide in summer. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
