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Narancic B, Saulnier-Talbot É, St-Onge G, Pienitz R. Diatom sedimentary assemblages and Holocene pH reconstruction from the Canadian Arctic Archipelago’s largest lake. ECOSCIENCE 2021. [DOI: 10.1080/11956860.2021.1926642] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Biljana Narancic
- Laboratoire de Paléoécologie Aquatique, Centre d’études Nordiques (CEN) & Département de Géographie, Université Laval, Québec, Canada
- Alfred Wegener Institute (AWI) Helmholtz Centre for Polar and Marine Research, Research Unit Potsdam, Potsdam, Germany
| | - Émilie Saulnier-Talbot
- Laboratoire de Paléoécologie Aquatique, Centre d’études Nordiques (CEN) & Département de Géographie, Université Laval, Québec, Canada
- Département de Biologie & Québec-Océan, Université Laval, Québec, Canada
| | - Guillaume St-Onge
- Institut des Sciences de la mer de Rimouski (ISMER), Canada Research Chair in Marine Geology, Université du Québec À Rimouski & GEOTOP, Rimouski, QC, Canada
| | - Reinhard Pienitz
- Laboratoire de Paléoécologie Aquatique, Centre d’études Nordiques (CEN) & Département de Géographie, Université Laval, Québec, Canada
- TAKUVIK Joint Laboratory UL/CNRS (France), Université Laval, Québec, QC, Canada
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Alter SE, Meyer M, Post K, Czechowski P, Gravlund P, Gaines C, Rosenbaum HC, Kaschner K, Turvey ST, van der Plicht J, Shapiro B, Hofreiter M. Climate impacts on transocean dispersal and habitat in gray whales from the Pleistocene to 2100. Mol Ecol 2015; 24:1510-22. [DOI: 10.1111/mec.13121] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Revised: 02/10/2015] [Accepted: 02/17/2015] [Indexed: 11/28/2022]
Affiliation(s)
- S. Elizabeth Alter
- Department of Biology; York College; City University of New York; 94-20 Guy R. Brewer Blvd Jamaica NY 11415 USA
- CUNY Graduate Center; 365 Fifth Avenue New York NY 10016 USA
- American Museum of Natural History; Sackler Institute for Comparative Genomics; 79th St and Central Park West New York NY 10024 USA
| | - Matthias Meyer
- Max Planck Institute for Evolutionary Anthropology; Deutscher Platz 6 Leipzig D-04103 Germany
| | - Klaas Post
- Natural History Museum Rotterdam; Westzeedijk 345 Rotterdam 3015 AA the Netherlands
| | - Paul Czechowski
- American Museum of Natural History; Sackler Institute for Comparative Genomics; 79th St and Central Park West New York NY 10024 USA
- School of Earth and Environmental Sciences; The University of Adelaide; North Terrace Adelaide SA 5000 Australia
| | - Peter Gravlund
- Den Blå Planet; National Aquarium Denmark; Jacob Fortlingsvej 1 Kastrup 2770 Denmark
| | - Cork Gaines
- American Museum of Natural History; Sackler Institute for Comparative Genomics; 79th St and Central Park West New York NY 10024 USA
| | - Howard C. Rosenbaum
- American Museum of Natural History; Sackler Institute for Comparative Genomics; 79th St and Central Park West New York NY 10024 USA
- Wildlife Conservation Society; Global Conservation Program-Ocean Giants Program; 185th St and Southern Blvd Bronx NY 10460 USA
| | - Kristin Kaschner
- Department of Biometry & Environmental Systems Analysis; Albert-Ludwigs-University of Freiburg; Tennenbacher Str. 4 Freiburg 79106 Germany
| | - Samuel T. Turvey
- Institute of Zoology; Zoological Society of London; Regent's Park London NW1 4RY UK
| | - Johannes van der Plicht
- Center for Isotope Research; Groningen University; Nijenborgh 4 Groningen 9747 AG the Netherlands
- Faculty of Archaeology; Leiden University; PO Box 9515 Leiden 2300 RA the Netherlands
| | - Beth Shapiro
- Department of Ecology and Evolutionary Biology; University of California Santa Cruz; Santa Cruz CA 95064 USA
| | - Michael Hofreiter
- Max Planck Institute for Evolutionary Anthropology; Deutscher Platz 6 Leipzig D-04103 Germany
- Department of Biology; University of York; Wentworth Way Heslington York YO10 5DD UK
- Faculty for Mathematics and Natural Sciences; Institute of Biochemistry and Biology; University of Potsdam; Karl-Liebknecht-Str. 24-25 Potsdam 14476 Germany
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Jetté H. A Canadian Contribution to the Paleoclimate Model Intercomparison Project (PMIP). ACTA ACUST UNITED AC 2007. [DOI: 10.7202/033025ar] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
ABSTRACT
PMIP (Paleoclimate Model lntercomparison Project) is designed to compare and improve the ability of General Circulation Models (GCMs) to simulate a wide range of climatic conditions including known features of past climatic states that are significantly different from present conditions. One of the first simulations of past climate conducted under this project targets the 6000 yr BP period for the following reasons: 1) deglaciation was complete and the last remnants of the Laurentide Ice Sheet had essentially disappeared by this time, 2) sea surface temperatures approached modern values, 3) the orbital insolation regime was the only major boundary condition significantly different from present, and 4) a number of study sites can already be used to provide preliminary paleoenvironmental reconstructions for this period. Contributions from the Canadian scientific community towards this experiment are presented, following a brief overview of Canadian modern environmental conditions which places the regional contributions into a broader perspective.
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Dyke AS, Dale JE, McNeely RN. Marine Molluscs as Indicators of Environmental Change in Glaciated North America and Greenland During the Last 18 000 Years. ACTA ACUST UNITED AC 2007. [DOI: 10.7202/033087ar] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
ABSTRACTDated mollusc collections are classified in assemblages to map paleo-faunistic zones. Hiatella arctica and Mya truncata account for almost half the records and comprise a restricted arctic assemblage. Arctic assemblages comprise 70% and arctic-dominated assemblages 80% of the database. Fifteen species dominate but 170 taxa are recorded. At last glacial maximum, the arctic zone extended from the Arctic Ocean to the Grand Banks. The boreal zone in the western Atlantic was compressed. The subarctic zone, which today dominates eastern Canada, was small. The boreal zone was extensive in the eastern Pacific where subarctic and arctic zones were compressed. Zones shifted northward during deglaciation and the arctic zone diversified when Bering Strait submerged 10.5-10.3 ka BP. Western Arctic molluscs during Younger Dryas time indicate shallow waters warmer than present. Major North Atlantic currents were established 9.5-9.0 ka BP. The subarctic zone extended to the head of Baffin Bay and a boreal zone became established in West Greenland 9-8 ka BP, with intensive changes about 8.5 ka BP. We relate the latter to the reduction of Mackenzie River discharge and in sea ice export to the North Atlantic as Laurentide ice withdrew from Mackenzie headwaters. The extended subarctic zone in Baffin Bay persisted until 3 ka BP and then retreated about 1000 km on the Canadian side. Boreal-subarctic molluscs in the Gulf of St. Lawrence before 9.5 ka BP derived from the glacial refugium. High boreal-subarctic molluscs farther north probably migrated from Europe. We postulate that the Labrador Current acts as a one-way valve for mollusc migrations at glacial-interglacial scales.
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Dyke AS. Late Quaternary Vegetation History of Northern North America Based on Pollen, Macrofossil, and Faunal Remains*. ACTA ACUST UNITED AC 2007. [DOI: 10.7202/014755ar] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
AbstractBiome maps spanning the interval from the last glacial maximum to modern times are presented. The biome distributions at 18 ka BP were probably as nearly in equilibrium with climate as are the modern distributions, but deglacial biomes were probably in disequilibrium. Ice sheet configuration was a strong control of climate until 7 ka BP. Regional climate trends can be inferred from changing biome distributions, but during periods of disequilibrium, biome distributions under-represent summer warming. Because of summer cooling by 2-4 °C during the Holocene, largely in the last 3-5 ka, middle and certain early Holocene biome distributions and species compositions are reasonable analogues of future equilibrium displacements due to equivalent warming, at least in areas that were long-since deglaciated. Past biome migration rates in response to rapid regional warming during deglaciation were mainly in the range of 100-200 m per year. If these rates pertain in the future, biomes may shift 10-20 km in most regions over the next century. A major impediment to using former Holocene conditions as a guide to future conditions is that warmer Holocene summers were accompanied by colder winters, whereas warmer future summers will be accompanied by warmer winters.
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Affiliation(s)
- Arthur S. Dyke
- Geological Survey of Canada, Natural Resouces Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada
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Syvitski JPM, Lewis CFM, Piper DJW, Syvitski JPM. Palaeoceanographic information derived from acoustic surveys of glaciated continental margins: examples from eastern Canada. ACTA ACUST UNITED AC 1996. [DOI: 10.1144/gsl.sp.1996.111.01.05] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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