Bacterial communities in temperate and polar coastal sands are seasonally stable


Contact
gunter.wegener [ at ] awi.de

Abstract

Coastal sands are biocatalytic filters for dissolved and particulate organic matter of marine and terrestrial origin, thus, acting as centers of organic matter transformation. At high temporal resolution, we accessed the variability of benthic bacterial communities over two annual cycles at Helgoland (North Sea), and compared it with seasonality of communities in Isfjorden (Svalbard, 78°N) sediments, where primary production does not occur during winter. Benthic community structure remained stable in both, temperate and polar sediments on the level of cell counts and 16S rRNA-based taxonomy. Actinobacteriota of uncultured Actinomarinales and Microtrichales were a major group, with 8 ± 1% of total reads (Helgoland) and 31 ± 6% (Svalbard). Their high activity (frequency of dividing cells 28%) and in situ cell numbers of >10% of total microbes in Svalbard sediments, suggest Actinomarinales and Microtrichales as key heterotrophs for carbon mineralization. Even though Helgoland and Svalbard sampling sites showed no phytodetritus-driven changes of the benthic bacterial community structure, they harbored significantly different communities (p < 0.0001, r = 0.963). The temporal stability of benthic bacterial communities is in stark contrast to the dynamic succession typical of coastal waters, suggesting that pelagic and benthic bacterial communities respond to phytoplankton productivity very differently.



Item Type
Article
Authors
Divisions
Primary Division
Programs
Primary Topic
Helmholtz Cross Cutting Activity (2021-2027)
N/A
Peer revision
ISI/Scopus peer-reviewed
Publication Status
Published
Eprint ID
54782
DOI 10.1038/s43705-021-00028-w

Cite as
Miksch, S. , Meiners, M. , Meyerdierks, A. , Probandt, D. , Wegener, G. , Titschack, J. , Jensen, M. A. , Ellrott, A. , Amann, R. and Knittel, K. (2021): Bacterial communities in temperate and polar coastal sands are seasonally stable , ISME Communications, 1 (1), pp. 1-11 . doi: 10.1038/s43705-021-00028-w


Download
[thumbnail of Miksch_Knittel_StableSedComm_ISME2021.pdf]
Preview
PDF
Miksch_Knittel_StableSedComm_ISME2021.pdf

Download (3MB) | Preview

Share


Citation

Geographical region
N/A

Research Platforms
N/A

Campaigns
N/A


Actions
Edit Item Edit Item