a96c4ddc-02a7-4c16-b4c8-6a95a2b45ad3 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 2022-04-08T13:00:08 North American Profile of ISO 19115:2003 2009-01-01 https://www.polardata.ca/pdcsearch/PDCSearchDOI.jsp?doi_id=10310 Dinoflagellate cysts from Hudson Bay sediment, 2005 2015-01-09 Gary Stern Maija Heikkilä David Barber Klaus Hoccheim Robie Macdonald Vera Pospelova Zou Zou Kuzyk Heikkilä, M., Pospelova, V., Hochheim, K.P., Kuzyk, Z.Z.A., Stern, G.A., Barber, D.G., and Macdonald, R.W. 2014. Surface sediment dinoflagellate cysts from the Hudson Bay system and their relation to freshwater and nutrient cycling. Marine Micropaleontology 106: 79-109. Sediment cores were collected onboard the CCGS Amundsen during ArcticNet cruise 0502 (2005) using a box corer, penetrating the seafloor to a maximum of 50 cm. Samples were stored in a freezer (- 20 °C) onboard the Amundsen until the end of the cruise, then shipped to the Freshwater Institute (FWI), where they were maintained in storage at - 20 °C. Subsamples were processed at the University of Victoria Marine Micropaleontology Laboratory in October-November 2010. A gentle version of the standard palynological protocol was applied to oven-dried samples of known volume. Steps are as follows: (1) add 10 % hydrochloric acid in room temperature; (2) sieve with distilled water through a 120 micrometre and a 15 micrometre nitex mesh, retaining the fraction in between; (3) add 48% hydrofluoric acid in room temperature for 2-4 days followed by 20 minutes in 10 % hydrochloric acid; (4) sieve through precise 15 micrometre mesh with gentle sonication for 10-60 seconds. The final residue of samples was placed in sealed storage vials and stored in + 4 °C. Aliquots of residue were mounted in glycerine jelly on microscopic slides with cover slips. Dinoflagellate cysts are studied primarily with Zeiss Standard 20 microscope under bright-field oil-immersion and 500X and 1000X magnifications. At least 300 dinoflagellate cysts species and cyst types will be identified on each slide together with pollen, freshwater algae and other palynomorphs. Data was collected in order to study present and past communities of dinoflagellates (single-celled organisms that play a central role in marine planktic food webs), nutrient cycling and freshwater-marine coupling. These factors play a role in determining the extent of primary production in the marine ecosystem, which provides a food base for higher trophic levels such as zooplankton, fish and marine mammals. 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/a96c4ddc-02a7-4c16-b4c8-6a95a2b45ad3/attachments/map.png Dinoflagellate cyst Hudson Bay Hudson Strait Primary production Sediment cores Sediments 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 Hudson Bay, Hudson Strait, Canada Terms of Use of the Polar Data Catalogue: https://www.polardata.ca/pdcinput/public/termsofuse eng; CAN environment -92.5 -72.8 54.6 65.5 Time period can be either covered by the content of the dataset or the date when the data has been collected. 2005-09-15 2005-10-26 Summary: Not Applicable Research Program(s): ArcticNet. For further information: Gary.Stern@dfo-mpo.gc.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