{ "@context":{"@vocab":"https://schema.org/"}, "@type":"ItemList", "itemListElement": [ { "@type":"ListItem", "position":1, "item":{ "@type":"Dataset", "name":"Long-term automated monitoring of year-round climatic parameters on Bylot Island, Nunavut", "datePublished": "2008-01-18", "dateModified": "2025-01-24", "description":"Climate has a strong impact on arctic wildlife species, either in the short term (e.g. due to strong annual variation in weather conditions) or in the long-term (e.g. due to global warming). In order to better understand theses impacts on wildlife and plants, we recommend the monitoring of a few basic weather variables. In many areas, climatic stations operated by Environment Canada can provide long-term data on weather but these stations are often located at some distance from our field sites. Therefore, it is recommended that some weather parameters are also monitored at the field site itself, at least during the field season, to have a record of local weather. The two most important weather variables to monitor are air temperatures and precipitations. Moreover, other climatic variables important to biological processes such as thawing degree-days, growing degree-days, and the number of frost-free days can be derived from air temperature data. In addition, snow depth and snow cover in spring should also be monitored because the timing of snow-melt in spring can have a considerable impact on the annual phenology of species.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=622", "keywords": [ "Geographic locations -> Bylot Island", "Natural sciences -> Air temperature", "Natural sciences -> Precipitation", "Natural sciences -> Relative humidity", "Natural sciences -> Snow cover", "Natural sciences -> Snow depth", "Natural sciences -> Soil temperature", "Natural sciences -> Solar radiation", "Natural sciences -> Winds" ], "creator":{ "@type":"Person", "name":"Gilles Gauthier", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-1-418-656-5507", "email":"gilles.gauthier@bio.ulaval.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"1993-Aug-9/Not Defined", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"73.2 -80.0 73.2 -80.0" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":2, "item":{ "@type":"Dataset", "name":"Mesozooplankton abundance, distribution and composition in the northern Baffin Bay: ArcticNet 2005-2018", "datePublished": "2011-01-28", "dateModified": "2025-04-28", "description":"Zooplankton herbivorous species play an important role in the channeling of energy and organic matter from the primary producers to higher trophic levels occupied by marine vertebrates. Various other processes involved in the biogeochemical flux of carbon in the ocean are mediated by zooplankton. Moreover, in the context of climatic change, a poleward displacement of southern and temperate zooplankton species from the northeast Atlantic and north Pacific is expected. This will bring the unique cold and ice covered Arctic specialized zooplankton assemblages under stronger competitive pressure, possibly resulting in species extinction and major disruptions of the Arctic marine ecosystems that need to be investigated. In these perspectives, knowledge of Arctic zooplankton community structure and diversity in different sectors of the Arctic Ocean needs to be improved in order to start monitoring the evolution of these communities over time. This dataset was produced to describe the zooplankton assemblages and their distribution in the northern Baffin Bay, with a strong emphasis on the North Water polynya region from 2005 to 2018.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=10508", "keywords": [ "Geographic locations -> Baffin Bay", "Geographic locations -> North Water Polynya", "Natural sciences -> Abundance", "Natural sciences -> Biodiversity", "Natural sciences -> Marine ecology", "Natural sciences -> Zooplankton" ], "creator":{ "@type":"Person", "name":"Maxime Geoffroy", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-(709)-778-0499", "email":"maxime.geoffroy@mi.mun.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2005-Aug-12/2021-Oct-31", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"79.0 -79.0 70.0 -69.0" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":3, "item":{ "@type":"Dataset", "name":"Mesozooplankton abundance, distribution and composition in the Canadian Arctic Archipelago: ArcticNet 2005-2018", "datePublished": "2011-01-28", "dateModified": "2025-04-28", "description":"Zooplankton herbivorous species play an important role in the channeling of energy and organic matter from the primary producers to higher trophic levels occupied by marine vertebrates and birds. Various other processes involved in the biogeochemical flux of carbon in the ocean are mediated by zooplankton. Moreover, in the context of climatic change, a poleward displacement of southern and temperate zooplankton species from the northeast Atlantic and north Pacific is expected. This will bring the unique cold and ice covered Arctic specialized zooplankton assemblages under stronger competitive pressure, possibly resulting in species extinction and major disruptions of the Arctic marine ecosystems that need to be investigated. In these perspectives, knowledge of Arctic zooplankton community structure and diversity in different sectors of the Arctic Ocean needs to be improved in order to start monitoring the evolution of these communities over time. This dataset was produced to describe the zooplankton assemblages and their distribution in the Canadian Arctic Archipelago from 2005 to 2018.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=10510", "keywords": [ "Geographic locations -> Barrow Strait", "Geographic locations -> Canadian Arctic Archipelago", "Natural sciences -> Abundance", "Natural sciences -> Biodiversity", "Natural sciences -> Marine ecology", "Natural sciences -> Zooplankton" ], "creator":{ "@type":"Person", "name":"Maxime Geoffroy", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-(709)-778-0499", "email":"maxime.geoffroy@mi.mun.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2005-Aug-20/2021-Nov-2", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"75.0 -120.0 65.0 -80.0" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":4, "item":{ "@type":"Dataset", "name":"Biological data of Arctic cod larvae and juveniles in the Canadian Arctic: ArcticNet 2005-2021", "datePublished": "2011-01-28", "dateModified": "2025-04-21", "description":"Arctic cod (Boreogadus saida) is a widely-distributed and abundant fish in the Arctic Ocean that mediate carbon directly from metazoan zooplankton to vertebrate predators of the marine food web. Survival, growth dynamic and feeding success during early stages of this key species are closely related to environmental factors such as surface temperature and Arctic sea ice concentration. This study explores the links between spatial and interannual differences in biological data of young stages Arctic cod and their changing habitat. The ultimate objective is to participate in developing models of the impacts of the on-going reduction of sea-ice on the trophic web of the High Arctic.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=10512", "keywords": [ "Geographic locations -> Beaufort Sea", "Geographic locations -> Canadian Arctic Archipelago", "Geographic locations -> Hudson Bay", "Natural sciences -> Arctic cod", "Natural sciences -> Feeding success", "Natural sciences -> Fish larvae", "Natural sciences -> Fishes", "Natural sciences -> Growth rate", "Natural sciences -> Morphology", "Natural sciences -> Otolith" ], "creator":{ "@type":"Person", "name":"Maxime Geoffroy", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-(709)-778-0499", "email":"maxime.geoffroy@mi.mun.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2005-Aug-10/2021-Oct-30", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"80.0 -140.0 56.0 -66.0" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":5, "item":{ "@type":"Dataset", "name":"Sedimentation and organic carbon data from Lake Melville, Labrador", "datePublished": "2015-01-21", "dateModified": "2025-02-27", "description":"Our main objectives were to investigate the sediment and organic matter deposition to Lake Melville and to quantify inputs and outputs through the system by developing contemporary budgets of sediment and particulate organic matter. Through the analysis of both natural (Pb-210, δ13C, organic carbon (OC) content) and anthropogenically derived Cs-137 in sediment cores, an understanding of previous environmental conditions can be achieved. Knowledge of these processes is essential to identify fundamental processes involved in the transfer of material from the watershed to the open ocean and to interpret the most sensitive processes that are likely to change in the future as a result of hydrological or climatic changes. Particulate matter collected from major tributaries and throughout Lake Melville and coastal waters in June 2013 and October 2014 were analysed for OC content and δ13C. This data contributes to the understanding and quantification of terrigenous and marine derived organic matter to the system.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=12053", "keywords": [ "Geographic locations -> Labrador", "Geographic locations -> Lake Melville", "Natural sciences -> 137-Cs", "Natural sciences -> 210-Pb", "Natural sciences -> Nutrients", "Natural sciences -> Organic carbon", "Natural sciences -> Radiochronology", "Natural sciences -> Sediment accumulation rate", "Natural sciences -> Sediment cores" ], "creator":{ "@type":"Person", "name":"Zou Zou Kuzyk", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-204-272-1535", "email":"zouzou.kuzyk@umanitoba.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2013-Jun-9/2014-Oct-23", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"54.3 -60.33 53.38 -58.07" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":6, "item":{ "@type":"Dataset", "name":"Moving Vessel Profiling (MVP) data collected by the CCGS Amundsen in the Canadian Arctic", "datePublished": "2015-11-03", "dateModified": "2025-07-15", "description":"The Moving Vessel Profiler (MVP) records temperature, salinity, sound velocity, fluorescence, dissolved oxygen, and transmittance in the water column. Vertical profiles provide information on prevailing physical oceanic conditions during CCGS Amundsen expeditions, aiding in biological, chemical, and physical samplings. They also record parameters for studying physical oceanographic processes in the Canadian Arctic Ocean, including water column structure, water mass characteristics, and oceanic circulation. While data collection extends beyond the Canadian Arctic border, the primary focus is on the Canadian Arctic Ocean.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=12519", "keywords": [ "Geographic locations -> Arctic Ocean", "Geographic locations -> Baffin Bay", "Geographic locations -> Beaufort Sea", "Geographic locations -> Canadian Arctic Archipelago", "Geographic locations -> Chukchi Sea", "Geographic locations -> Greenland", "Geographic locations -> Gulf of St. Lawrence", "Geographic locations -> Hudson Bay", "Geographic locations -> Hudson Strait", "Geographic locations -> Labrador", "Geographic locations -> Nares Strait", "Geographic locations -> Northwest Passage", "Natural sciences -> CTD (Conductivity, Temperature, Depth)", "Natural sciences -> Fluorescence", "Natural sciences -> Transmittance", "Natural sciences -> Water column" ], "creator":{ "@type":"Organization", "url":"http://doi.org/10.5884/12519", "name":"ArcticNet", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-418-656-2411", "email":"pdc@arcticnet.ulaval.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2004-Jun-20/2024-Oct-23", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"81.23 -167.49 48.19 -55.86" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":7, "item":{ "@type":"Dataset", "name":"CTD data collected by the CCGS Amundsen in the Canadian Arctic", "datePublished": "2016-10-20", "dateModified": "2025-04-16", "description":"This research aims to collect and provide core physical and chemical oceanographic data for all Arctic research teams onboard CCGS Amundsen and other interested scientists.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=12713", "keywords": [ "Geographic locations -> Arctic Ocean", "Geographic locations -> Baffin Bay", "Geographic locations -> Northwest Passage", "Natural sciences -> Conductivity", "Natural sciences -> CTD (Conductivity, Temperature, Depth)", "Natural sciences -> CTD profiles", "Natural sciences -> Fluorescence", "Natural sciences -> Nitrates", "Natural sciences -> Oxygen", "Natural sciences -> Photosynthesis", "Natural sciences -> Photosynthetically available radiation (PAR)", "Natural sciences -> Pressure", "Natural sciences -> Salinity", "Natural sciences -> Temperature", "Natural sciences -> Transmittance" ], "creator":{ "@type":"Organization", "url":"http://doi.org/10.5884/12713", "name":"ArcticNet", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-418-656-2411", "email":"pdc@arcticnet.ulaval.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2014-Jul-15/2024-Oct-26", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"81.2 -172.5 47.4 -48.4589" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":8, "item":{ "@type":"Dataset", "name":"ThermoSalinoGraph (TSG) data collected by the CCGS Amundsen in the Canadian Arctic", "datePublished": "2016-10-20", "dateModified": "2025-07-15", "description":"Provide core physical oceanographic data for all arctic research teams onboard CCGS Amundsen and other interested scientists. The underway ThermoSalinoGraph (TSG) system records data on surface seawater temperature, salinity, fluorescence and sound velocity along the transit route. These data constitute ancillary data for all other data recorded during the CCGS Amundsen scientific expeditions by providing information on the prevailing physical oceanic conditions in which biological, chemical and physical samplings were conducted. They also provide long-term records of the basic parameters central to the study of physical oceanographic processes, more specifically water column structure, water masses characteristics and oceanic circulation, in the Canadian Arctic Ocean.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=12715", "keywords": [ "Geographic locations -> Arctic Ocean", "Natural sciences -> Fluorescence", "Natural sciences -> Salinity", "Natural sciences -> Velocity", "Natural sciences -> Water temperature" ], "creator":{ "@type":"Organization", "url":"http://doi.org/10.5884/12715", "name":"ArcticNet", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-418-656-2411", "email":"pdc@arcticnet.ulaval.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2005-Aug-22/2024-Oct-29", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"81.48 -172.58 46.38 -50.75" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":9, "item":{ "@type":"Dataset", "name":"The effect of retrogressive thaw slumps on the delivery of high loads of toxic methylmercury to downstream freshwater systems in the Peel Plateau region, Northwest Territories", "datePublished": "2017-03-30", "dateModified": "2025-03-24", "description":"The objectives of this research are as follows:(1)Quantify THg and MeHg delivery from retrogressive thaw slumps (RTS) features to Peel Plateau streams, and explore how this delivery varies with slump morphology;(2)Determine how THg and MeHg concentrations downstream of slumps change with increasing distance from the site of disturbance, to better understand how slumping might affect streamwater Hg at the landscape scale;(3)Quantify biogeochemical controls on within-stream THg and MeHg concentrations across slump sites and throughout the thaw season, to better understand drivers of THg and MeHg on the Peel Plateau; and(4)Generate information about the relationship between slumping and Hg that is useful to local communities that use the Peel Plateau landscape, to enable community members to apply their land use decisions more confidently.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=12806", "keywords": [ "Geographic locations -> Northwest Territories", "Health sciences and contaminants -> Mercury", "Natural sciences -> Biogeochemistry", "Natural sciences -> Permafrost", "Natural sciences -> Stream" ], "creator":{ "@type":"Person", "name":"Suzanne Tank", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-780-248-1152", "email":"suzanne.tank@ualberta.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2016-Jul-1/2016-Aug-25", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"67.415 -135.97 67.142 -135.08" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":10, "item":{ "@type":"Dataset", "name":"Understanding and Predicting Mercury in Dehcho Lakes, Northwest Territories", "datePublished": "2019-04-29", "dateModified": "2025-03-06", "description":"In this project, we are aiming to understand how landscape, lake, and fish ecology explain variation in fish mercury (Hg levels). Our results are identifying critical variables for future cumulative impact monitoring, and will enable more informed predictions of how fish Hg levels in the Dehcho region will respond to continued environmental change. Decision-makers will use our results to develop long-term monitoring strategies, identify lakes that are most vulnerable to future increases in fish Hg levels, refine consumption advisories, and identify lakes with the safest and healthiest sources of food fish. This data set is collected to support several projects supported by Northern Contaminants Program, CIMP 154 (GNWT), and the project titled Northern Water Futures, Objective 2'. Northern Water Futures is a Pillar 3 project under the Global Water Futures Program funded by Canada First Research Excellence Fund", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=13080", "keywords": [ "Geographic locations -> Northwest Territories", "Health sciences and contaminants -> Mercury", "Health sciences and contaminants -> Methylmercury", "Health sciences and contaminants -> Safety", "Natural sciences -> Carbon", "Natural sciences -> Community-based monitoring", "Natural sciences -> Contaminants", "Natural sciences -> Ecology", "Natural sciences -> Environmental impacts", "Natural sciences -> Fisheries", "Natural sciences -> Hydrology", "Natural sciences -> Invertebrates", "Natural sciences -> Lakes", "Natural sciences -> Map layers", "Natural sciences -> Monitoring", "Natural sciences -> Nitrogen", "Natural sciences -> Sediments", "Natural sciences -> Stable isotope analyses", "Natural sciences -> Stream", "Natural sciences -> Water chemistry", "Natural sciences -> Wetland", "Social sciences, economics and policy -> Strategies" ], "creator":{ "@type":"Person", "name":"Heidi Swanson", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-2267896855", "email":"hswanson@uwaterloo.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2018-Aug-1/2027-Sep-30", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"63.413929 -123.084138 60.185535 -117.492097" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":11, "item":{ "@type":"Dataset", "name":"Kitikmeot Marine Ecosystems Study - Oceanographic Mooring Dataset", "datePublished": "2019-10-11", "dateModified": "2025-03-12", "description":"The main purpose of the WF1 and WF2 moorings was to investigate the oceanographic conditions affecting the shipwreck Erebus in the Queen Maud Gulf.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=13108", "keywords": [ "Natural sciences -> Carbon fluxes", "Natural sciences -> CTD (Conductivity, Temperature, Depth)", "Natural sciences -> Fluorescence", "Natural sciences -> Marine sediments", "Natural sciences -> Mooring", "Natural sciences -> Ocean currents", "Natural sciences -> Oceanography", "Natural sciences -> Sedimentation rates", "Natural sciences -> Turbidity" ], "creator":{ "@type":"Person", "name":"Amundsen Science Core Data Collection DATA Coordinator : Tahiana Ratsimbazafy", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-418-656-2411", "email":"pdc@arcticnet.ulaval.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2015-Sep-20/2018-Sep-6", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"81.0 -150.0 46.0 -48.0" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":12, "item":{ "@type":"Dataset", "name":"Long-term oceanic observatories moorings data in the Beaufort Sea during ArcticNet study 2004-2010, reprocessed.", "datePublished": "2019-10-11", "dateModified": "2024-10-25", "description":"To monitor changes in physical, biological and geochemical properties of the Canadian Arctic waters, ocean observatories (moorings) were deployed in the Beaufort Sea, Hudson Bay, Lancaster Sound, and Melville Sound as part of the ArcticNet field program. These moorings are the oceanic equivalent of atmospheric meteorological stations. The data are used to describe the seasonal and annual variations in the Arctic environment and its local ecosystems. This, in turn, enables us to understand how, and how quickly, global warming is affecting the Arctic", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=13109", "keywords": [ "Geographic locations -> Amundsen Gulf", "Geographic locations -> Beaufort Sea", "Geographic locations -> Mackenzie Shelf", "Natural sciences -> Density", "Natural sciences -> Fluxes", "Natural sciences -> Monitoring", "Natural sciences -> Ocean currents", "Natural sciences -> Salinity", "Natural sciences -> Temperature", "Natural sciences -> Water column" ], "creator":{ "@type":"Person", "name":"Amundsen Science Core Data Collection DATA Coordinator : Tahiana Ratsimbazafy", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-418-656-2411", "email":"pdc@arcticnet.ulaval.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2004-Oct-12/2010-Sep-21", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"71.7981 -138.6737 69.9551 -123.10067" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":13, "item":{ "@type":"Dataset", "name":"Ontogenetic profiles of stable isotopes (15N and 13C) in dentine growth layer groups (GLGs) of narwhal embedded teeth", "datePublished": "2021-04-20", "dateModified": "2025-04-14", "description":"Narwhal embedded canines were collected by Inuit during subsistence hunts near Pond Inlet and provided to Fisheries and Oceans Canada through a voluntary collaborative sampling program with the Pond Inlet Hunters and Trappers Association. These harvested narwhals belonged to the Baffin Bay narwhal population, which is monitored by DFO for stock assessment. Stable isotope analysis (SIA) of sequential dentine growth layer groups from narwhal embedded canine teeth can be used to estimate the lifetime diet of individuals and infer major ontogenetic shifts such as the completion of nursing. We used SIA of dentine to investigate ontogenetic dietary patterns, with a focus on nursing duration. We also determined whether nursing duration differed between sexes and between 2 periods during which narwhals may have undergone dietary shifts due to warming. Embedded teeth from both sexes were collected near Pond Inlet, Nunavut, Canada, in 1982 and 1983 (n = 17) and 2015 and 2017 (n = 14). Nursing duration ranged from ~2 to ~6 yr, with 60% of narwhals being nursed beyond the previously published estimate of <2 yr. The proportion of individuals nursed <2 yr versus >2 yr did not differ between sexes or periods. This study not only revealed that narwhals vary extensively in their nursing duration, but also indicated that extended nursing (>2 yr) with gradual introduction of solid food over this period was common. These findings provide insights into narwhal life history strategies, as extended nursing may be another feature of a long-lived, slow-reproducing mammal adapted to unique polar conditions that are threatened by global warming.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=13235", "keywords": [ "Natural sciences -> Carbon", "Natural sciences -> Ecology", "Natural sciences -> Narwhals", "Natural sciences -> Nitrogen", "Natural sciences -> Stable isotope analyses", "Natural sciences -> Wildlife" ], "creator":{ "@type":"Person", "name":"Shu-Ting Zhao", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-2048075986", "email":"shuting.zhaost@gmail.com" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"1982-Jun-2/2017-Aug-16", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"72.35633 -81.1066 65.421509 -70.965424" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":14, "item":{ "@type":"Dataset", "name":"Stomach content of 339 age-0 Arctic cod collected in the Canadian Arctic between 2009 and 2018.", "datePublished": "2022-02-21", "dateModified": "2025-03-20", "description":"Gut content of age-0 Boreogadus saida collected in August and September between 2009 and 2018 in the Canadian Arctic were analyzed to study the impact of Arctic warming on feeding success and diet, for inclusion in the following scientific article: Pascale Caissy, Caroline Bouchard, Jennifer L. Herbig, Maxime Geoffroy & Frdric Maps (in preparation). Impacts of changing environmental conditions on age-0 Arctic cod (Boreogadus saida) feeding success in the Canadian Arctic and Greenland Sea. The main goal was to determine whether age-0 Arctic cod could benefit from the rapid warming of the Arctic and identify tipping points where diet could potentially shift.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=13264", "keywords": [ "Geographic locations -> Arctic Ocean", "Geographic locations -> Canada", "Natural sciences -> Arctic cod", "Natural sciences -> Fish larvae", "Natural sciences -> Gut content analyses" ], "creator":{ "@type":"Person", "name":"Caroline Bouchard", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-418-634-0590 6228", "email":"caroline.bouchard@bio.ulaval.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2009-Aug-5/2018-Aug-27", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"77.320666 -135.9955 68.29519 -67.00695" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":15, "item":{ "@type":"Dataset", "name":"Nunatsiavut Plastics Pollution Data-NG-CLEAR", "datePublished": "2023-01-26", "dateModified": "2025-05-06", "description":"This study uses Inuit hunter and fisher-based sampling design for researching plastic ingestion by species important to community members as sources of wild food in Nunatsiavut. Community-based monitoring is important to Inuit and Northern communities. It gives us the power, knowledge, and control over what research we want to do and see in the North. While plastic pollution is a global issue, plastic profiles can differ significantly from place to place and specific concerns about plastics and approaches to plastic research in Inuit Nunangat are a community affair.Nunatsiavummuit already know there is plastic in the environment and are concerned about its presence--Nain was one of the first places in Canada to create a plastic bag ban in 2009. We are now building a bird's eye view of the different types of plastics, especially microplastics; how they are distributed in our foodways, lands, and waters place by place; how their concentrations and ingestion rates by wild food change by season; and which sources of plastics are most significant and available to change in our communities.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=13295", "keywords": [ "Natural sciences -> Microplastics", "Natural sciences -> Plastics", "Northern communities -> Hopedale", "Northern communities -> Makkovik", "Northern communities -> Nain", "Northern communities -> Rigolet", "Social sciences, economics and policy -> Environment surveillance" ], "creator":{ "@type":"Person", "name":"Max Liboiron", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-7096935928", "email":"mliboiron@mun.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2017-Jul-3/2026-Mar-30", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"56.54 -61.69 56.54 -61.69" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":16, "item":{ "@type":"Dataset", "name":"Water salinity, oxygen isotope, and nutrient data from southeast Hudson Bay and James Bay", "datePublished": "2023-10-04", "dateModified": "2025-02-19", "description":"The purpose of this research was to study the influence of altered freshwater discharge on the seasonality of nutrient distributions near La Grande River, northeastern James Bay. In subarctic marine environments, winter is a time when nutrient stocks are replenished through physical and biogeochemical processes, largely setting an upper limit on new primary production for the next growing season. In spring, freshwater-associated nutrient additions from sea ice melt and river inflow modify marine nutrient stocks and influence primary production, especially in coastal areas. In northeastern James Bay (NEJB), Qubec, hydroelectric development of the La Grande River (LGR) has shifted the timing of peak freshwater discharge from spring into winter, producing ten times the natural winter flows. In situ observations of coastal water properties in this area are limited to a handful of studies, none of which simultaneously included nutrients and freshwater tracers to distinguish the influence of river water from sea-ice melt. In this study, we used salinity, oxygen isotope ratio (18O), and nutrient (nitrate, phosphate) data collected from NEJB coastal waters during six campaigns spanning 2016 and 2017 to quantify sea-ice melt and river water content and their influence on nutrient distributions within the LGR plume. Our results show that the LGR is the dominant source of freshwater to coastal waters in both winter and summer and an important source of nitrogen to nitrogen-limited coastal waters. Regulation of the LGR has shifted fluvial nitrate inputs from spring (pre-development) to winter (post-development) producing a mismatch between high surface nitrate stocks available to support primary production now occurring in winter and the growing season, which can begin only after the return of light. In NEJB, the timing and magnitude of primary production, dependent on nutrients in the water column, is expected to have been impacted by altered freshwater input, reducing overall production in local areas and potentially increasing production further downstream with cascading effects on the marine ecosystem.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=13318", "keywords": [ "Geographic locations -> Canada", "Geographic locations -> Hudson Bay", "Geographic locations -> James Bay", "Natural sciences -> Biogeochemistry", "Natural sciences -> Biological productivity", "Natural sciences -> Isotopes", "Natural sciences -> Water chemistry" ], "creator":{ "@type":"Person", "name":"Zou Zou Kuzyk", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-204-272-1535", "email":"zouzou.kuzyk@umanitoba.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2016-Jan-26/2017-Sep-28", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"55.0 -80.0 53.0 -78.0" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":17, "item":{ "@type":"Dataset", "name":"Dynamic microbial populations in Canadas Arctic Ocean are poised to respond to environmental change", "datePublished": "2023-10-05", "dateModified": "2025-02-24", "description":"The Arctic Ocean is warming at twice the rate of other marine ecosystems. Marine microbiomes drive primary productivity and sustain Arctic food webs, are an important indicator of ecosystem health and function, and provide early indications of environmental change. Water, sediment, ice, and brine samples were collected onboard CCGS Amundsen from over 80 locations spanning 8 years to provide a broad geographic sampling of locations throughout the Canadian Arctic. These samples will be analyzed via 16S and shotgun metagenomic sequencing to provide essential baseline information about the microbial communities in the Canadian Arctic. Results will characterize and quantify the Arctic marine microbiome in space and time, integrating results with other ArcticNet oceanographic data. This will be the first-ever large-scale genomic assessment of Canadas Arctic marine ecosystem. Microorganisms are also natures first responders to environmental perturbations, including hydrocarbon-degrading bacteria which can break down oil in this sensitive ecosystem. This is of great interest to the scientific community, policymakers and decision-makers as rapid changes in Arctic ecosystems and accelerating industrial activity pose a greater risk of accidental oil spills. Highlighting the response of the Arctic marine microbiome to oil spills and identifying unique Arctic-specific genes and genomes will guide mitigation efforts in different high-latitude spill scenarios.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=13322", "keywords": [ "Geographic locations -> Arctic", "Geographic locations -> Baffin Bay", "Geographic locations -> Beaufort Sea", "Geographic locations -> Canada", "Geographic locations -> Canadian Arctic Archipelago", "Geographic locations -> Hudson Bay", "Geographic locations -> Hudson Strait", "Geographic locations -> Labrador Sea", "Geographic locations -> Nunatsiavut", "Natural sciences -> Archaea", "Natural sciences -> Bacteria", "Natural sciences -> Marine sediments", "Natural sciences -> Microorganisms" ], "creator":{ "@type":"Person", "name":"Whitney England", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-403-461-6522", "email":"whitney.england@ucalgary.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2013-Aug-14/2019-Sep-11", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"76.383533 -133.638667 53.789833 -54.693817" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":18, "item":{ "@type":"Dataset", "name":"Ice core characteristics from the Belcher Islands and Sanikiluaq, NU", "datePublished": "2023-10-05", "dateModified": "2025-02-26", "description":"The objective of this study is to gather landfast ice data in collaboration with a community-based monitoring program based out of Sanikiluaq, NU. Community members observed differences in the thickness and properties of the ice during some years that they considered possibly related to changes in the properties of the water underlying the ice or changes in currents and circulation. Previous studies have found that the area south and east of the Belcher Islands has shallow stratification throughout winter because of accumulation of river water originating in James Bay. A shallow subsurface water mass at a depth of ~ 30 m also contains remnant heat from the previous summer, which may affect ice properties at sites of upwelling. The landfast ice data and observations collected at the Belcher Islands comprise part of the PhD thesis research of University of Manitoba student Aura Diaz. Among her research interests is the response of sea ice to changes in high-latitude climate- and marine systems, and the role of sea ice in providing feedbacks to these processes. Her observations of ice and auxiliary parameters (snow, winds, air temperatures, surface water temperature and salinity, etc.) seek to improve understanding of how the environmental factors of the atmosphere (temperature, wind, etc.) and ocean (salinity, circulation, etc.) control sea ice growth and melt, and how the structure and properties of the sea ice are affected. This research helps address major gaps in our understanding of atmosphere-ice-ocean interactions and how changing sea ice feedback processes, in turn, modify these atmospheric and oceanic environmental factors. A more complete understanding of the processes connecting the atmosphere, sea ice and ocean will help improve how landfast ice, especially in areas with significant river water presence in winter, is represented in Earth System models.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=13323", "keywords": [ "Geographic locations -> Hudson Bay", "Natural sciences -> Ice", "Natural sciences -> Ice cores", "Natural sciences -> Landfast ice", "Natural sciences -> Sea ice", "Northern communities -> Sanikiluaq" ], "creator":{ "@type":"Person", "name":"Zou Zou Kuzyk", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-204-272-1535", "email":"zouzou.kuzyk@umanitoba.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2019-Mar-12/2022-May-30", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"56.5 -79.4 56.2 -78.8" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":19, "item":{ "@type":"Dataset", "name":"Oceanography data for James Bay from the James Bay Expedition of the R/V William Kennedy 2021-2022", "datePublished": "2023-10-06", "dateModified": "2024-12-13", "description":"Over three years, 2021-2023, various oceanographic data were collected in James Bay and southern Hudson Bay, Canada, from onboard the research vessel William Kennedy, to help update understanding of the oceanography of the region. The expeditions were led by University of Manitoba researchers (Mundy, Ehn, Kuzyk) and involved collaborators from the Freshwater Institute, Fisheries and Oceans Canada, University of Sherbrooke (QC), L'Universit du Qubec Rimouski (UQAR), and Universit Laval. Funding support was provided by NSERC, Parks Canada, and Oceans North. The Cree Marine Research Needs Working Group chaired by Oceans North provided regional support and advice, and consultations with Chiefs and Councils of coastal communities helped plan the cruise. The research program was multidisciplinary and included sampling in support of physical oceanography, chemical oceanography, biogeochemistry (both organic and inorganic), biological oceanography (primary production), invertebrates and fish, environmentalDNA (eDNA), and sediment geochemistry (box coring). Accomplishments include deployment and recovery of oceanographic moorings for annual periods. The moorings carried sensors for temperature, salinity, and current profiles, and selected moorings carried instruments for measuring ecological properties (light, fluorescence of dissolved organic matter and chlorophyll, pH) and collecting settling particulate matter (i.e., sediment traps). Hydrographic sections were completed that included several hundred conductivity-temperature-depth (CTD) casts to profile the water column. Near-continuous measurements of salinity and temperature were obtained from a flow-through system connected to the ships thermosalinograph. The ships zodiacs were used to extend sampling sections towards the coast and various river mouths.An Algae Online Analyser implemented on the flow-through system provided estimates of phytoplankton community abundance. Additionally, several hundred water and sediment samples were obtained and brought back to university labs for analysis.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=13332", "keywords": [ "Geographic locations -> Canada", "Geographic locations -> Hudson Bay", "Geographic locations -> James Bay", "Natural sciences -> Biogeochemistry", "Natural sciences -> Biological productivity", "Natural sciences -> Carbon fluxes", "Natural sciences -> Circulation", "Natural sciences -> CTD (Conductivity, Temperature, Depth)", "Natural sciences -> Mooring", "Natural sciences -> pH", "Natural sciences -> Salinity", "Natural sciences -> Water temperature" ], "creator":{ "@type":"Person", "name":"Zou Zou Kuzyk", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-204-272-1535", "email":"zouzou.kuzyk@umanitoba.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2021-Aug-2/2023-Sep-5", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"60.0 -95.0 51.0 -78.0" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } }, { "@type":"ListItem", "position":20, "item":{ "@type":"Dataset", "name":"Observations of diatoms, dinoflagellate cysts and highly branched isoprenoid lipids within the sea ice, water column, sediment traps, and sediment surface in the Belcher Islands Archipelago, Hudson Bay throughout spring 2019", "datePublished": "2023-10-06", "dateModified": "2024-12-13", "description":"This project sought to obtain direct observations of the seasonal distribution and habitat of algal species widely used as sedimentary sea-ice proxies. The ongoing rapid reductions of sea-ice area, persistence and thickness have motivated increasing efforts to resolve past sea-icechanges and their climatic causes. This study was done to address a major challenge with sea-ice reconstructions, namely deficient knowledge of the habitats, environmental controls, and vertical transport of many protist species and biomarkers commonly associated with sea ice. In this study, we focused on the three groups of biogenic sea-ice proxies: diatoms, dinoflagellate cysts and highly branched isoprenoid lipids (HBIs), which are biomarkers selectively synthesized by some diatom species. We collected and analyzed samples from the landfast sea ice, the under-ice water column, an automated sequencing sediment trap suspended about 40m beneath the ice cover, and the surface sediment. We chose to conduct the study near Sanikiluaq, on the Belcher Islands in southeastern Hudson Bay, where University of Manitoba researchers Jens Ehn and Zou Zou Kuzyk have been working in partnership with the Arctic Eider Society and Inuit since 2014. The baseline knowledge of the oceanography around the Belcher Islands developed through this research partnership and knowledge shared by Inuit partners informed the design of the study and enabled its successful execution. The study was conducted by the team over spring-summer 2019, and included deploying a Baker-style sequential sediment trap through a hole cut in the landfast ice cover. Valuable insights into sea-ice proxies were gained from the study. We demonstrated previously unstudied species-specific temporal and habitat sources for diatoms, dinoflagellate cysts and HBIs. The results support the notion that these sedimentary proxies are particularly valuable when used jointly. We also showed that sediment core diatom and dinoflagellate cyst assemblages from seasonally ice-covered environments can be dominated by species not directly affiliated with sea ice.", "url":"https://www.polardata.ca/pdcsearch/PDCSearch.jsp?doi_id=13333", "keywords": [ "Geographic locations -> Canada", "Geographic locations -> Hudson Bay", "Natural sciences -> Algae", "Natural sciences -> Climate change", "Natural sciences -> CTD profiles", "Natural sciences -> Dinoflagellate cyst", "Natural sciences -> Ice", "Natural sciences -> Ice algae", "Natural sciences -> Seawater", "Natural sciences -> Sediment cores", "Natural sciences -> Sediments", "Northern communities -> Sanikiluaq" ], "creator":{ "@type":"Person", "name":"Zou Zou Kuzyk", "contactPoint":{ "@type":"ContactPoint", "contactType":"technical support", "telephone":"+1-204-272-1535", "email":"zouzou.kuzyk@umanitoba.ca" } }, "includedInDataCatalog":{ "@type":"DataCatalog", "name":"polardata.ca" }, "temporalCoverage":"2019-Mar-1/2019-Aug-14", "spatialCoverage":{ "@type":"Place", "geo":{ "@type":"GeoShape", "box":"57.0 -80.0 56.0 -78.0" } }, "license":"https://www.polardata.ca/pdcinput/public/termsofuse" } } ] }