EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/24/2018 | 10:00 AM - 10:15 AM | ENVIRONMENTAL MONITORING IN A WARMING ARCTIC: SPATIAL AND TEMPORAL PATTERNS OF DIATOM ASSEMBLAGES FROM CIRCUMPOLAR LAKES AND STREAMS | 420 B
ENVIRONMENTAL MONITORING IN A WARMING ARCTIC: SPATIAL AND TEMPORAL PATTERNS OF DIATOM ASSEMBLAGES FROM CIRCUMPOLAR LAKES AND STREAMS
Better data harmonization is required to improve environmental monitoring programs. Here, a large dataset of circum-Arctic contemporary and paleolimnological diatom assemblages was harmonized and used to establish current (point-in-time reference) and pre-industrial environmental conditions, and to explore spatio-temporal trends in diatom assemblages in a warming Arctic.
Spatial trends from contemporary samples suggest that certain diatom assemblage clusters are specific to the high Arctic zone, and that these differ taxonomically between lakes and streams. Paleolimnological records show spatially and temporally heterogeneous and highly variable magnitudes of diatom compositional change across the study region. Areas where the least amount of change occurred include northernmost Québec, Baffin Island, and the Central Canadian Archipelago. Sites in Northeastern NWT showed moderate change, whereas the greatest changes were recorded in the northernmost sites (Ellesmere Island), the southernmost sites (southern Hudson Bay), and near the Beaufort Sea coast. Many lakes that register striking assemblage compositional shifts can clearly be linked to trajectories of recent Arctic warming.
The results from this study will be key to establishing the foundation for future assessments of global and regional trends across the Arctic.
- Climate Change
- Arctic
- Bioassessment
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Presenters/Authors
Maria Kahlert
(), Department of Aquatic Sciences and Assessment, SLU, Uppsala, Sweden, Maria.Kahlert@slu.se;
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Isabelle Lavoie
(), Institut National de la Recherche Scientifique, Centre Eau Terre Environnement, isabelle.lavoie@ete.inrs.ca;
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Kathleen Rühland
(), Queen's University, ruhlandk@queensu.ca;
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Francois Keck
(), Swedish University of Agricultural Sciences, francois.keck@slu.se;
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Emilie Saulnier-Talbot
(), Université Laval, Québec, emiliest@hotmail.com;
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Daniel Bogan
(), Alaska Center for Conservation Science at University of Alaska Anchorage, dlbogan@alaska.edu;
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Robert Brua
(), Environment Canada, bob.brua@ec.gc.ca;
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Stephane Campeau
(), University of Quebec at Trois Rivieres, stephane.campeau@uqtr.ca;
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Joseph M. Culp
(), Environment Canada , joseph.culp@ec.gc.ca ;
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Kirsten Seestern Christoffersen
(), Freshwater Biological Laboratory, University of Copenhagen, Depth of Arctic Biology, University Center in Svalbard, Norway, kchristoffersen@bio.ku.dk;
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Arni Einarsson
(), University of Iceland, arnie@hi.is;
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Jennifer Lento
(), Canadian Rivers Institute, Department of Biology, University of New Brunswick, jlento@gmail.com;
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Satu-Maaria Karjalainen
(), Norwegian Institute for Water Research, Satu.Maaria.Karjalainen@ymparisto.fi;
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Susanne Schneider
(), Finnish Environment Institute (SYKE), susi.schneider@niva.no;
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Rebecca Shaftel
(), Alaska Center for Conservation Science at University of Alaska Anchorage, rsshaftel@alaska.edu;
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John Smol
(), Queen's University, smolj@queensu.ca;
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