Dataset extent

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ICE-CAMPS

Sea ice algae are an important contributor of primary production in the Arctic ecosystem. Within the bottom-ice environment, access to nutrients from the underlying ocean is a major factor controlling production, phenology, and taxonomic composition of ice algae. Previous studies have demonstrated that tides and currents play an important role in driving the flux of nutrients to bottom-ice algal communities when biological demand during the spring bloom is high. In this study we investigate how surface currents under landfast first-year ice influence nutrient supply based on stoichiometric composition, algal chlorophyll a biomass and species composition during spring 2016, in Dease Strait, Nunavut. Stronger water dynamics over a shoaled and constricted strait dominated by tidal currents (tidal strait) supported turbulent flow more than 85% of the deployment duration in comparison to outside the tidal strait in an embayment where turbulent flow was only evidenced a small percentage (< 15%) of the time. The system appeared to be nitrate-depleted with surface water concentrations averaging 1.3 mol L–1. Increased currents were correlated significantly with a decrease in ice thickness and an increase in ice algal chlorophyll a. Furthermore, pennate diatoms dominated the ice algal community abundance with greater contribution within the strait where currents were greatest. These observations all support the existence of a greater nutrient flux to the ice bottom where currents increased towards the center of the tidal strait, resulting in an increase of bottom ice chlorophyll a biomass by 5–7 times relative to that outside of the strait. Therefore, expanding beyond the long identified biological hotspots of open water polynyas, this paper presents the argument for newly identified hotspots in regions of strong sub-ice currents but persistent ice covers, so called “invisible polynyas”.

Cite project as: Mundy, C.J., Pogorzelec, Nicole, Dalman, Laura, 2016, "Ice Camps", https://doi.org/10.5203/pb1d-a512, Canadian Watershed Information Network, V1

Data Resources

Additional Info

Field Value
Abstract These datasets are from Dease Strait, Nunavut collected between 6 to 12 May, 2016 and in spring 2017.
Cite Project Mundy, C.J., Pogorzelec, Nicole, Dalman, Laura, 2016, "Ice Camps", 10.5203/pb1d-a512, Canadian Watershed Information Network, V1
Research Program Name Ice-Camps
Project website

Project Keywords

Keywords
Keyword Vocabulary
Keyword Vocabulary URL https://www.polardata.ca/pdcinput/public/keywordlibrary
Project Status Inactive
Project DOI 10.5203/pb1d-a512

Project License

License Name Creative Commons Attribution Share-Alike 4.0
License URL https://spdx.org/licenses/
Terms of use
License Scheme Name SPDX

Principal Investigators

Name Mundy, C.J
Type of Name Personal
Email cj.mundyfoo(at) umanitoba.ca
ORCID ID
Name Identifier Scheme URI https://orcid.org/
Name Identifier Scheme ORCID

Co-Investigators

Name
Role
Affiliation (e.g Environment Canada)
ORCID ID
Name Identifier Scheme URI https://orcid.org/
Name Identifier Scheme ORCID

Data Curator

Name Laura Dalman
Type DataCurator
Data Curator Email laura.dalmanfoo(at) umanitoba.ca
Affiliation (e.g Environment Canada)

Funding References

Project Start
Project End
Project Metadata Creation Date
Publisher Canadian Watershed Information Network (CanWIN), University of Manitoba
Resource Sub-Type Online resource
Resource Category Collection
Spatial Extent (GeoJSON)
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