Description
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.
Enregistrements de données
Les données de cette ressource données d'échantillonnage ont été publiées sous forme d'une Archive Darwin Core (Darwin Core Archive ou DwC-A), le format standard pour partager des données de biodiversité en tant qu'ensemble d'un ou plusieurs tableurs de données. Le tableur de données du cœur de standard (core) contient 24 enregistrements.
1 tableurs de données d'extension existent également. Un enregistrement d'extension fournit des informations supplémentaires sur un enregistrement du cœur de standard (core). Le nombre d'enregistrements dans chaque tableur de données d'extension est illustré ci-dessous.
Cet IPT archive les données et sert donc de dépôt de données. Les données et métadonnées de la ressource sont disponibles pour téléchargement dans la section téléchargements. Le tableau des versions liste les autres versions de chaque ressource rendues disponibles de façon publique et permet de tracer les modifications apportées à la ressource au fil du temps.
Versions
Le tableau ci-dessous n'affiche que les versions publiées de la ressource accessibles publiquement.
Droits
Les chercheurs doivent respecter la déclaration de droits suivante:
L’éditeur et détenteur des droits de cette ressource est UiT The Arctic University of Norway. Ce travail est sous licence Creative Commons Attribution Non Commercial (CC-BY-NC) 4.0.
Enregistrement GBIF
Cette ressource a été enregistrée sur le portail GBIF, et possède l'UUID GBIF suivante : 5d37bb8b-4108-45b5-b3da-e648c95e5d5c. UiT The Arctic University of Norway publie cette ressource, et est enregistré dans le GBIF comme éditeur de données avec l'approbation du GBIF Norway.
Mots-clé
Samplingevent
Contacts
- Créateur ●
- Personne De Contact ●
- Chercheur Principal
https://orcid.org/0000-0001-9577-3935
- Processeur
- Processeur
- Processeur
Couverture géographique
Svartnes, Balsfjorden, Norway (190 m bottom depth)
| Enveloppe géographique | Sud Ouest [69,363, 19,117], Nord Est [69,363, 19,117] |
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Couverture taxonomique
Pas de description disponible
| Species | Microsetella norvegica |
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Couverture temporelle
| Date de début | 2017-06-19 |
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| Date de début | 2017-06-21 |
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| Date de début | 2018-06-11 |
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| Date de début | 2018-06-13 |
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Données sur le projet
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.
| Titre | MICROSNOW |
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| Identifiant | Microsnow_2017_2018_Balsfjord |
| Financement | Financially supported by fram center flagship “Climate Change in Fjord and Coast” grant nr. 2019147470 292018 |
| Description du domaine d'étude / de recherche | Svartnes, Balsfjord, Northern Norway |
| Description du design | Field sampling and analysis of field data in combination with experiments in the laboratory |
Les personnes impliquées dans le projet:
Méthodes d'échantillonnage
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.
| Etendue de l'étude | 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). |
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Description des étapes de la méthode:
- 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.
Métadonnées additionnelles
| Identifiants alternatifs | https://ipt.gbif.no/resource?r=microsnow_microsetella |
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