View: |
Part 1: Document Description
|
Citation |
|
---|---|
Title: |
Replication Data for: Light and freshwater discharge drive the biogeochemistry and microbial ecology in a sub-Arctic fjord over the Polar night |
Identification Number: |
doi:10.18710/WG4Y4J |
Distributor: |
DataverseNO |
Date of Distribution: |
2022-02-28 |
Version: |
1 |
Bibliographic Citation: |
Klausen, Line; Vonnahme, Tobias R.; Bank, Rose M.; Michellod, Dolma; Dietrich, Ulrikke; Gradinger, Rolf, 2022, "Replication Data for: Light and freshwater discharge drive the biogeochemistry and microbial ecology in a sub-Arctic fjord over the Polar night", https://doi.org/10.18710/WG4Y4J, DataverseNO, V1 |
Citation |
|
Title: |
Replication Data for: Light and freshwater discharge drive the biogeochemistry and microbial ecology in a sub-Arctic fjord over the Polar night |
Identification Number: |
doi:10.18710/WG4Y4J |
Authoring Entity: |
Klausen, Line (UiT The Arctic University of Norway) |
Vonnahme, Tobias R. (UiT The Arctic University of Norway) |
|
Bank, Rose M. (University of Southern Denmark) |
|
Michellod, Dolma (Max Planck Institute for Marine Microbiology) |
|
Dietrich, Ulrikke (UiT The Arctic University of Norway) |
|
Gradinger, Rolf (UiT The Arctic University of Norway) |
|
Other identifications and acknowledgements: |
RV Hyas |
Other identifications and acknowledgements: |
Larvik, Gaute |
Other identifications and acknowledgements: |
Gerhardsen, Frode |
Other identifications and acknowledgements: |
Kunuk, Lennart |
Other identifications and acknowledgements: |
Tatone, Ivan |
Other identifications and acknowledgements: |
Nordli, Evald |
Other identifications and acknowledgements: |
Dubourg, Paul |
Producer: |
UiT The Arctic University of Norway |
Grant Number: |
01vm/h15 |
Grant Number: |
869154 |
Grant Number: |
869154 |
Grant Number: |
869154 |
Distributor: |
DataverseNO |
Distributor: |
UiT The Arctic University of Norway |
Access Authority: |
Klausen, Line |
Access Authority: |
Vonnahme, Tobias R. |
Depositor: |
Klausen, Line |
Date of Deposit: |
2022-01-13 |
Holdings Information: |
https://doi.org/10.18710/WG4Y4J |
Study Scope |
|
Keywords: |
Earth and Environmental Sciences, polar night, marine bacteria, phytoplankton bloom, microalgae, fjord, community structure, land-fjord interactions, microbial ecology, Ramfjorden, Norway |
Abstract: |
This dataset contains data files to the winter microbial ecology in a sub-Arctic fjord in northern Norway. The polar night has recently received increased attention as a surprisingly active biological season. Yet, polar night microbial ecology is a vastly understudied field. To identify the physical and biogeochemical parameters driving microbial activity over the dark season, we studied a sub-Arctic fjord system in northern Norway from autumn to early spring with detailed monthly sampling. We focused on the impact that mixing, terrestrial organic matter input and light have on the dynamics of the microbial ecosystem. Our study highlights strong seasonal differences in the key drivers during spring, autumn, and winter. The spring bloom starts while the water column is still fully mixed, opposing the traditional critical depth hypothesis. We identified incident solar radiation as the key driver for a spring bloom starting in March. However, it takes until April before the bloom reaches substantial chlorophyll biomass. The autumn bloom is controlled by vertical mixing, driving nutrient upwelling and dilution of zooplankton grazers, which had their highest biomass during this time. We suggest that the dilution-recoupling hypothesis stating that dilution of zooplankton by vertical mixing is crucial to reduce grazing stress and allow a bloom formation is crucial for the autumn bloom. We found that even a short period with a lack of terrestrial runoff due to subzero temperatures in combination with strong winds was able to mix the water column, triggering an October/November autumn bloom. During the light-limited polar night primary production was extremely low, but bacteria continued growing on decaying algae and their exudates, but also allochthonous organic matter. We suggest that a melting event in January could fuel a mid-winter bacteria bloom. In conclusion, polar night biogeochemistry and microbial ecology is not only driven by light availability, but strongly affected by freshwater discharge and land-ocean coupling. With climate change freshwater discharge is increasing in the Arctic, leading to an increasing importance of the dynamics described in this study. |
Date of Collection: |
2018-10-10-2019-05-14 |
Country: |
Norway, Norway |
Geographic Coverage: |
Troms, Balsfjorden, Troms, Ramfjorden |
Geographic Bounding Box: |
|
Kind of Data: |
Oceanographic data |
Kind of Data: |
Biochemical data |
Kind of Data: |
Community structure |
Methodology and Processing |
|
Sources Statement |
|
Data Access |
|
Other Study Description Materials |
|
Related Publications |
|
Citation |
|
Title: |
Vonnahme, T. R., Klausen, L., Bank, R. M., Michellod, D., Lavik, G, Dietrich, U., and Gradinger, R. (2022). Light and freshwater discharge drive the biogeochemistry and microbial ecology in a sub-Arctic fjord over the Polar night, Frontiers in Marine Science, 30 September 2022, Sec. Marine Biogeochemistry, Volume 9. |
Identification Number: |
10.3389/fmars.2022.915192 |
Bibliographic Citation: |
Vonnahme, T. R., Klausen, L., Bank, R. M., Michellod, D., Lavik, G, Dietrich, U., and Gradinger, R. (2022). Light and freshwater discharge drive the biogeochemistry and microbial ecology in a sub-Arctic fjord over the Polar night, Frontiers in Marine Science, 30 September 2022, Sec. Marine Biogeochemistry, Volume 9. |
Label: |
00_README_RF_v3.txt |
Notes: |
text/plain |
Label: |
Rampro_14C_in-situ_processed.txt |
Notes: |
text/plain |
Label: |
Rampro_14C_in-situ_raw.txt |
Notes: |
text/plain |
Label: |
Rampro_Biogeochemistry.txt |
Notes: |
text/plain |
Label: |
Rampro_CTD.txt |
Notes: |
text/plain |
Label: |
Rampro_PAR_Olavsvern.txt |
Notes: |
text/plain |
Label: |
Rampro_production_summary.txt |
Notes: |
text/plain |
Label: |
Rampro_Protist_cells.txt |
Notes: |
text/plain |
Label: |
Rampro_Sampling_log.txt |
Notes: |
text/plain |
Label: |
Rampro_SIP_incubations.txt |
Notes: |
text/plain |