Ice Covered Ecosystems - CAMbridge Bay Process Studies
***Ice Covered Ecosystems - CAMbridge bay Process Studies (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...
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Online Access: | https://search.dataone.org/view/sha256:774f36ba71a7e19d81f8dae3c41f34c6c627e817e992f795351b322d57b31b1d |
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dataone:sha256:774f36ba71a7e19d81f8dae3c41f34c6c627e817e992f795351b322d57b31b1d 2024-06-03T18:46:39+00:00 Ice Covered Ecosystems - CAMbridge Bay Process Studies BEGINDATE: 2016-05-06T00:00:00Z ENDDATE: 2022-01-01T00:00:00Z https://search.dataone.org/view/sha256:774f36ba71a7e19d81f8dae3c41f34c6c627e817e992f795351b322d57b31b1d unknown Ice cores Ice algae Diatoms Lipid Photosynthetically available radiation Biomass Arctic Nutrients Upwelling Taxonomy Chlorophyll Particulate organic carbon Dataset 2022 dataone:urn:node:CANWIN 2024-06-03T18:18:35Z ***Ice Covered Ecosystems - CAMbridge bay Process Studies (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 land-fast, 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”. Dataset Arctic Cambridge Bay ice algae Nunavut Sea ice Unknown Arctic Cambridge Bay ENVELOPE(-105.130,-105.130,69.037,69.037) Dease Strait ENVELOPE(-107.502,-107.502,68.834,68.834) Nunavut |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
dataone:urn:node:CANWIN |
language |
unknown |
topic |
Ice cores Ice algae Diatoms Lipid Photosynthetically available radiation Biomass Arctic Nutrients Upwelling Taxonomy Chlorophyll Particulate organic carbon |
spellingShingle |
Ice cores Ice algae Diatoms Lipid Photosynthetically available radiation Biomass Arctic Nutrients Upwelling Taxonomy Chlorophyll Particulate organic carbon Ice Covered Ecosystems - CAMbridge Bay Process Studies |
topic_facet |
Ice cores Ice algae Diatoms Lipid Photosynthetically available radiation Biomass Arctic Nutrients Upwelling Taxonomy Chlorophyll Particulate organic carbon |
description |
***Ice Covered Ecosystems - CAMbridge bay Process Studies (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 land-fast, 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”. |
format |
Dataset |
title |
Ice Covered Ecosystems - CAMbridge Bay Process Studies |
title_short |
Ice Covered Ecosystems - CAMbridge Bay Process Studies |
title_full |
Ice Covered Ecosystems - CAMbridge Bay Process Studies |
title_fullStr |
Ice Covered Ecosystems - CAMbridge Bay Process Studies |
title_full_unstemmed |
Ice Covered Ecosystems - CAMbridge Bay Process Studies |
title_sort |
ice covered ecosystems - cambridge bay process studies |
publishDate |
2022 |
url |
https://search.dataone.org/view/sha256:774f36ba71a7e19d81f8dae3c41f34c6c627e817e992f795351b322d57b31b1d |
op_coverage |
BEGINDATE: 2016-05-06T00:00:00Z ENDDATE: |
long_lat |
ENVELOPE(-105.130,-105.130,69.037,69.037) ENVELOPE(-107.502,-107.502,68.834,68.834) |
geographic |
Arctic Cambridge Bay Dease Strait Nunavut |
geographic_facet |
Arctic Cambridge Bay Dease Strait Nunavut |
genre |
Arctic Cambridge Bay ice algae Nunavut Sea ice |
genre_facet |
Arctic Cambridge Bay ice algae Nunavut Sea ice |
_version_ |
1800869204214153216 |