476da10b-99c3-472d-8f40-2180241ff013 eng; CAN Polar Data Catalogue Canadian Cryospheric Information Network (519) 888-4567 x32689 200 University Avenue West, University of Waterloo Waterloo Ontario N2L 3G1 Canada pdc@uwaterloo.ca 2022-04-08T13:00:24 North American Profile of ISO 19115:2003 2009-01-01 https://www.polardata.ca/pdcsearch/PDCSearchDOI.jsp?doi_id=928 Paleoceanographic studies of the impacts of natural and anthropogenic perturbations in three Labrador fjord ecosystems (Nachvak, Saglek and Anaktalak). 2010-01-26 Reinhard Pienitz Thomas Richerol Unpublished data In November 2006 3 shorts sediment cores from 3 fjord ecosystems located along Labrador's East coast, have been sampled from CCGS Amundsen. In August 2008 4 lakes in Saglek fjord area have been sampled. Data about the properties of the water column and short sediment cores have been taken. In November 2009, a ~8m long piston-core and a ~80cm long gravity-core have been taken in the Nachvak fjord from the CCGS Amundsen. In addition, surface sediment samples were taken through box-cores in the Nachvak, Saglek, Okak and Anaktalak fjords.The cores have been analyzed for various physical and chemical properties, such as sediment density, magnetic susceptibility and contaminant levels. The biostratigraphic analyses involved sediment sub-sampling at 1-2 cm intervals to determine changes in the composition and concentration of fossil diatoms and dinocysts throughout the marine cores, only diatoms for the lacustrine cores. The chronology of each core has been established based on AMS-14C dates on marine shells preserved within the sediments and on the radioactive decay of the 210Pb in the sediments. The surface sediment sampled in the fjord will be used to document the modern dinocyst assemblages in the area to allow more precise past climatic reconstructions. Sediment cores from 3 fjord ecosystems located along Labrador's East coast have been sampled in November 2006 from CCGS Amundsen. There is concern about the ecological integrity of the marine environment of northern Labrador, especially with respect to the impacts of climate change, industrialization and contamination on the local food web. The fossil diatoms and the cysts of dinoflagellates are two important proxy indicator organisms in marine environments that allow for reconstructions of past climatic and environmental conditions in both pelagic and benthic habitats. Sediments from Nachvak Fjord, next to the Torngat Mountains National Park Reserve, will be used to study the natural variability of environmental conditions in Labrador fjord ecosystems, while serving as a reference for the assessment of human-induced perturbations in the 2 other southern fjords (Saglek and Anaktalak). Saglek fjord sediments have been contaminated with PCBs (PolyChloroBiphenyl) due to erosional inputs from a former military site. We will try to track the ecosystem response to this kind of contamination. Since the beginning of mining activities by the Voisey¿s Bay Nickel Company (VBNC), the fjord¿s Anaktalak Bay has received mining effluents and wastes from shipping and housing. This project aims at determining the impacts of these activities, as well as developing appropriate indicators for the long-term monitoring of the environmental and ecological conditions within this fjord ecosystem. Polar Data Catalogue Canadian Cryospheric Information Network (519) 888-4567 x32689 200 University Avenue West, University of Waterloo Waterloo Ontario N2L 3G1 Canada pdc@uwaterloo.ca polardata.ca http https://metadata.arice-h2020.eu/geonetwork/srv/api/records/476da10b-99c3-472d-8f40-2180241ff013/attachments/map.png Anaktalak Bay Climate Contaminants Diatoms Dinoflagellate cyst Labrador Nachvak Fiord PCBs Saglek Bay Polar Data Catalogue Thesaurus (Canada) 2021-06-02 Canadian Cryospheric Information Network (519) 888-4567 x32689 200 University Avenue West, University of Waterloo Waterloo Ontario N2L 3G1 Canada pdc@uwaterloo.ca polardata.ca http https://www.polardata.ca/pdcinput/public/keywordlibrary Labrador fjords: Nachvak, Saglek, Anaktalak Bay Terms of Use of the Polar Data Catalogue: https://www.polardata.ca/pdcinput/public/termsofuse eng; CAN environment -63.862 -62.0695 56.422 59.057 Time period can be either covered by the content of the dataset or the date when the data has been collected. 2006-12-01 2011-12-01 Summary: Not Applicable Research Program(s): ArcticNet. For further information: reinhard.pienitz@cen.ulaval.ca false Digital file 1.0 Polar Data Catalogue Canadian Cryospheric Information Network (519) 888-4567 x32689 200 University Avenue West, University of Waterloo Waterloo Ontario N2L 3G1 Canada pdc@uwaterloo.ca This metadata was generated from the PDC metadata database at 2021-06-02 Polar Data Catalogue Canadian Cryospheric Information Network (519) 888-4567 x32689 200 University Avenue West, University of Waterloo Waterloo Ontario N2L 3G1 Canada pdc@uwaterloo.ca