In the project MICROSNOW the ecological role of the small copepod Microsetella norvegica in the sub-Arctic Balsfjorden, Norway, was investigated. Since M. norvegica is often undersampled in net hauls with a standard WP-2 net (180 µm mesh size), this project collected zooplankton water samples with a 30 L GoFlow bottle at distinct depths (0, 10, 20, 50, 90, 120 m). From the collected water, 20 L were concentrated onto a 20 µm mesh sieve, the collected zooplankton was preserved with buffered formaldehyde and later different developmental stages of M. norvegica were enumerated (adult male, adult female, copepodite stage CIV- CV, copepodite stage CI-CIII, nauplius). Under the projectID "Microsnow_2017_2018_Balsfjord" there is also an an additional data set on the zooplankton community composition at the same station (WP-2 net, 64 µm mesh size) available on GBIF.
The data in this sampling event resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 24 records.
1 extension data tables also exist. An extension record supplies extra information about a core record. The number of records in each extension data table is illustrated below.
This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.
The table below shows only published versions of the resource that are publicly accessible.
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The publisher and rights holder of this work is UiT The Arctic University of Norway. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC 4.0) License.
This resource has been registered with GBIF, and assigned the following GBIF UUID: 5d37bb8b-4108-45b5-b3da-e648c95e5d5c. UiT The Arctic University of Norway publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Norway.
Svartnes, Balsfjorden, Norway (190 m bottom depth)
|Bounding Coordinates||South West [69.363, 19.117], North East [69.363, 19.117]|
No Description available
Vertical export of organic carbon from pelagic to benthic ecosystems consists mainly of copepod faecal pellets and detrital aggregates (marine snow). However, it is estimated that 20-70 % of the aggregate-associated carbon is degraded by grazing organisms within the euphotic zone. One copepod species believed to play a vital role in particle flux reduction is Microsetella norvegica, but little is known about its ecology and biology. In the first year (2017) of MICROSNOW, we successfully completed high-resolution field-investigations focusing on the role of M. norvegica for regulating the pelagic-benthic coupling in Balsfjord. More specifically, we investigated the zooplankton community composition, aggregate distribution, hydrographical and chemical properties of the water column and vertical carbon fluxes. Experiments on M. norvegica egg hatching and respiration rates at 4 different temperatures, grazing experiments and behavioural studies were successfully completed and data are now being processed. In the second year of the project we will continue building a strong data-set by including new complementary investigations. We will also focus on dissemination of results through outreach and publication. Novelties within the project are: 1) high-resolution in situ mapping of marine snow and copepods, 2) identifying interactions between sinking particles and copepods through in situ video-observations and experiments and 3) increased knowledge on M. norvegica biology and its role for pelagic-benthic coupling. This is a timely approach in the context of the future role of coastal marine ecosystems as a sink or source for atmospheric CO2, and for building knowledge on the resources available for harvestable species.
|Funding||Financially supported by fram center flagship “Climate Change in Fjord and Coast” grant nr. 2019147470 292018|
|Study Area Description||Svartnes, Balsfjord, Northern Norway|
|Design Description||Field sampling and analysis of field data in combination with experiments in the laboratory|
The personnel involved in the project:
To enumerate different developmental stages of Microsetella norvegica in June 2017 and June 2018, a 30 L GoFlow bottle was in each year successively deployed to 6 water depth (surface, 10, 20, 50, 90, 120 m) on two different days. The collected water was brought on board. From each GoFlow bottle cast, 20 L water were gently emptied via a silicone tube. The water sample was concentrated onto a 20 μm meshed sieve and transferred to a PVC bottle for later counts of Microsetella norvegica. These zooplankton samples were preserved with buffered formaldehyde at 4 % final concentration.
|Study Extent||All samples were collected at the same station. Both in 2017 and 2018, the station was sampled twice and during each of the in total 4 sampling days, zooplankton water samples were collected at 6 depths (0, 10, 20, 50, 90, 120 m).|
Method step description:
- Zooplankton enumeration was generally done according to the procedures described in Postel et al. (2000., Biomass and abundance, p. 83-192. In R. Harris, J. Lenz, M. Huntley, P. Wiebe and H. R. Skjoldal (eds.), ICES Zooplankton Methodology Manual. Academic Press.) and Kwasniewski et al. (2010, doi: 10.1016/j.pocean.2010.06.004).
- Only a sub-sample was identified and counted. A box splitter was used to divide the GoFlo samples into two halves, and then only 1 half was examined in its entirety due to the low zooplankton concentrations. Copepodite life stages CI-CV of M. norvegica were identified at higher magnification using the Olympus light microscope model BX50, the other indentification was mostly done in a Olympus model SZX7 stereomicroscope.