Research Interests

Professor in the Department of Geography, Dr. Reinhard Pienitz leads the Aquatic Paleoecology Laboratory http://www2.ffgg.ulaval.ca/paleoecologie/ at Centre d'Études Nordiques (CEN).The paleolimnologic research in his laboratory focuses on the use of fossil freshwater algae (diatoms), insects (chironomid larvae) and invertebrates (cladocera, ostracods) preserved in the sediments of arctic lakes and ponds (Labrador, Nunavik, Nunavut, Northwest Territories and Yukon/Alaska) to reconstruct changes in climate and the environment during post-glacial times. The remains of marine diatoms and dinocysts in sedimentary deposits of coastal regions serve as indicators of changes in paleo-currents, paleoproductivity and sea-level fluctuations in paleoceanographic studies along the Canadian West Coast, the Beaufort Sea coast (southern Arctic Ocean) and the Canadian East Coast (Labrador fjords). His research also focusses on the recovery and study of long-term climate archives from crater lake ecosystems in Nunavik (Pingualuit Crater Lake project) and southern Patagonia (PASADO project). In addition, research projects are underway that determine, using multiple freshwater proxies, the water quality of drinking water reservoirs impacted by animal populations (snow geese, caribous) in the Arctic, by urban and agricultural pollution in the Québec City region, as well as by mining activities in Nunavik and Nunavut. His lab administers the Circumpolar Diatom Database (CDD) since 1997.

Education

1993 - 1994
Postdoctoral fellowship in Limnology/Paleolimnology
Queen's University, Canada

1990 - 1993
Ph.D. Biology
Queen's University, Canada

1985 - 1990
Diplom in Biogeography, Geomorphology, Limnology
Universitat des Saarlandes, Germany

1988 - 1989
M.Sc. Physical Geography
Université Laval, Canada

1982 - 1985
B.Sc. in Biogeography
Universitat des Saarlandes, Germany

Research Experience

Director of the M.Sc. in environmental biogeosciences (2016 - present)
Departement of geographie
Université Laval, Canada

Professor (2003 - present)
Aquatic Paleoecology Laboratory
Université Laval, Canada

Adjunct professor (2006 - 2019)
INRS-ETE / Centre Eau, Terre, Environnement
Québec, Canada
http://www.ete.inrs.ca/ete

Visiting Professor (2016/05 - 2016/07)
Stable Isotope Laboratory
Alfred Wegener Inst. for Polar & Marine Res., Germany

Visiting Professor (2016/02 - 2016/04)
Institute of Geology and Mineralogy
University of Cologne, Germany

Vice-dean of research (2009 - 2012)
Faculty of Forestry, Geography and Geomatics
Université Laval, Canada

Visiting Professor (2009/04 - 2009/06)
Oeschger Institute
Universität Bern, Switzerland

Adjunct Professor (2002 - 2006)
Earth Sciences
Carleton University, Canada

Associate Professor (1999 - 2003)
Departement of geographie
Université Laval, Canada

Assistant Professor (1994 - 1999)
Departement of geographie
Université Laval, Canada

Visiting Professor (1998/03 - 1998/04)
Limnological Institute
Universitat Innsbruck, Austria

Postdoctoral fellowship (1993 - 1994)
Limnology/Paleolimnology
Queen's University, Canada

Scientific Leadership

Leader (2017 - present)
GROBEC - Projet de reconstitution paléolimnologique de l'évolution des lacs du bassin de la rivière Bécancour
Université Laval, Canada

Leader (2017 - present)
NSERC - Lake studies for the paleolimnological assessment of climate change impacts in the Canadian Arctic
Université Laval, Canada

Leader (2017 - present)
NSERC - Evolution of postglacial landscapes and hydrological gateways in the Foxe Basin - Nettilling Lake region
Université Laval, Canada

Co-Leader (2015 - present)
FRQNT - Centre d'études nordiques
Université Laval, Canada

Co-Leader (2018 - 2019)
Institut Kenauk - La pirogue du lac Papineau (Outaouais)
Université Laval, Canada

Co-Leader (2016 - 2019)
AQUABIO - Biosurveillance aquatique communautaire sur la rivière George, Nunavik (Community-based monitoring of the George River water quality as an empowerment tool in Kangiqsualujjuaq, Nunavik)
Université Laval, Canada

Awards

2013
10 most significant scientific contributions in Quebec selected by independent panel

2011
10 most significant scientific contributions in Quebec selected by independent panel

2011
Diatom species named for Dr Reinhard Pienitz and published in Lange-Bertalot, H., Bak, M. & Witkowski, A. (2011). Eunotia and some related genera, vol. 6. Diatoms of Europe. Diatoms of the European inland waters and comparable habitats.

2008 - 2011
NSERC Award for Science Promotion - Title: Découvrez les sciences naturelles et le génie par l'environnement, le plein air et les technologies de pointe!

2008 - 2011
NSERC - Discovery Accelerator Supplement (DAS) - Title: Impacts of climatic change and environmental stress on aquatic ecosystems

2001
10 most significant scientific contributions in Quebec selected by independent panel

Publications

2023

Adaïmé, M., Pienitz, R., Legendre, P., & Antoniades, D. (2022). Postglacial palaeoenvironmental reconstruction of the Fury and Hecla Strait region (Nunavut) inferred from microfossils and geochemical proxies. Journal of Quaternary Science, 37(5), 944–958. https://doi.org/10.1002/jqs.3287

Jacques, O., & Pienitz, R. (2023). Limnological history of three lakes from the former asbestos mining region of Thetford Mines (southern Quebec, Canada). Aquatic Sciences, 85(4), 89. https://doi.org/10.1007/s00027-023-00985-5

Latourelle-Vigeant, C., Pienitz, R., & Bhiry, N. (2023). Evolution of Coastal Subarctic Lakes in the Context of Climatic and Geological Changes and Human Occupation (North-Central Labrador, Canada). Geosciences, 13(4), 97. https://doi.org/10.3390/geosciences13040097

2022

Coulombe, S., Fortier, D., Bouchard, F., Paquette, M., Charbonneau, S., Lacelle, D., Laurion, I., & Pienitz, R. (2022). Contrasted geomorphological and limnological properties of thermokarst lakes formed in buried glacier ice and ice-wedge polygon terrain. The Cryosphere, 16(7), 2837-2857. https://doi.org/10.5194/tc-16-2837-2022

Gnjato, S., Narancic, B., Antoniades, D., Pienitz, R., Biskaborn, B., Gnjato, R., & Dekic, R. (2022). Surface sediment diatom assemblages from four alpine lakes in the Zelengora Mountains (Bosnia and Herzegovina): A pilot study. Botanica Serbica, 46(1), 61-70. https://doi.org/10.2298/BOTSERB2201061G

Jacques, O., & Pienitz, R. (2022a). Impacts of asbestos mining activities on the evolution of Lac a la Truite d'Irlande, Thetford Mines region (Quebec, Canada). Canadian Water Resources Journal / Revue Canadienne Des Ressources Hydriques, 47(1), 40-60. https://doi.org/10.1080/07011784.2021.2004930

Jacques, O., & Pienitz, R. (2022b). Asbestos mining waste impacts on the sedimentological evolution of the Bécancour chain of lakes, southern Quebec (Canada). Science of The Total Environment, 807, 151079. https://doi.org/10.1016/j.scitotenv.2021.151079

Jacques, O., & Pienitz, R. (2022c). Assessment of asbestos fiber contamination in lake sediment cores of the Thetford Mines region, southern Quebec (Canada). Environmental Advances, 8, 100232. https://doi.org/10.1016/j.envadv.2022.100232

Narancic, B., Saulnier‐Talbot, É., Meyer, H., & Pienitz, R. (2023). A 5000‐year paleoclimate record from Nettilling Lake (Baffin Island) based on diatom assemblages and oxygen isotope composition. Journal of Quaternary Science, 37(5), 959–966. https://doi.org/10.1002/jqs.3366

2021

Adaïmé, M.-É., Pienitz, R., Legendre, P., & Antoniades, D. (2021). Postglacial palaeoenvironmental reconstruction of the Fury and Hecla Strait region (Nunavut) inferred from microfossils and geochemical proxies. Journal of Quaternary Science, n/a(n/a). https://doi.org/10.1002/jqs.3287

Jacques, O., & Pienitz, R. (2021). Impacts des activités minières d'amiante sur l'évolution du lac à la Truite d'Irlande, région de Thetford Mines (Québec, Canada) Impacts of asbestos mining activities on the evolution of Lac à la Truite d'Irlande, Thetford Mines region (Quebec, Canada). Canadian Water Resources Journal/Revue Canadienne Des Ressources Hydriques, 1-21. https://doi.org/10.1080/07011784.2021.2004930

Narancic, B., Saulnier-Talbot, É., Meyer, H., & Pienitz, R. (2021). A 5000-year paleoclimate record from Nettilling Lake (Baffin Island) based on diatom assemblages and oxygen isotope composition. Journal of Quaternary Science, n/a(n/a). https://doi.org/10.1002/jqs.3366

Narancic, B., Saulnier-Talbot, É., St-Onge, G., & Pienitz, R. (2021). Diatom sedimentary assemblages and Holocene pH reconstruction from the Canadian Arctic Archipelago's largest lake. Écoscience, 28(3-4), 347-360. https://doi.org/10.1080/11956860.2021.1926642

Viehberg, F. A., Medeiros, A. S., Plessen, B., Wang, X., Muir, D., & Pienitz, R. (2021). The influence of a lost society, the Sadlermiut, on the environment in the Canadian Arctic. Scientific Reports, 11(1), 18504. https://doi.org/10.1038/s41598-021-97631-7

2020

Bouchard, F., Fortier, D., Paquette, M., Boucher, V., Pienitz, R., & Laurion, I. (2020). Thermokarst lake inception and development in syngenetic ice-wedge polygon terrain during a cooling climatic trend, Bylot Island (Nunavut), eastern Canadian Arctic. The Cryosphere, 14(8), 2607-2627. https://doi.org/10.5194/tc-14-2607-2020

Jacques, O., Pienitz, R., & Ibrahim, G. (2020). Paleolimnological assessment of long-term changes in a boreal recreational lake of the Fermont mining region (subarctic Quebec, Canada). Lake and Reservoir Management, 36(3), 314-334. https://doi.org/10.1080/10402381.2019.1711470

Kaufman, D., McKay, N., Routson, C., Erb, M., Davis, B., Heiri, O., Jaccard, S., Tierney, J., Dätwyler, C., Axford, Y., Brussel, T., Cartapanis, O., Chase, B., Dawson, A., de Vernal, A., Engels, S., Jonkers, L., Marsicek, J., Moffa-Sánchez, P., Morrill, C., Orsi, A., Rehfeld, K., Saunders, K., Sommer, P.-S., Thomas, E., Tonello, M., Tóth, M., Vachula, R., Andreev, A., Bertrand, S., Biskaborn, B., Bringué, M., Brooks, S., Caniupán, M., Chevalier, M., Cwynar, L., Emile-Geay, J., Fegyveresi, J., Feurdean, A., Finsinger, W., Fortin, M.-C., Foster, L., Fox, M., Gajewski, K., Grosjean, M., Hausmann, S., Heinrichs, M., Holmes, N., Ilyashuk, B., Ilyashuk, E., Juggins, S., Khider, D., Koinig, K., Langdon, P., Larocque-Tobler, I., Li, J., Lotter, A., Luoto, T., Mackay, A., Magyari, E., Malevich, S., Mark, B., Massaferro, J., Montade, V., Nazarova, L., Novenko, E., Pařil, P., Pearson, E., Peros, M., Pienitz, R., ... Zhilich, S. (2020). A global database of Holocene paleotemperature records, Scientific Data, 7(1), 115. https://doi.org/10.1038/s41597-020-0445-3

Pienitz, R., & Jacques, O. (2020). Sedimentological and limnological evolution of recreational lakes in a former asbestos mining region (Québec, Canada): Insights from paleolimnology. 3741. https://ui.adsabs.harvard.edu/abs/2020EGUGA..22.3741P

Saulnier-Talbot, É., Antoniades, D., Pienitz, R. (2020). Hotspots of biotic compositional change in lakes along vast latitudinal transects in northern Canada, Global Change Biology, 26(4), 2270-2279. https://doi.org/10.1111/gcb.15016

2019

Bouchard, F., Fortier, D., Paquette, M., Boucher, V., Pienitz, R., Laurion, I. (2019). Thermokarst lake development in syngenetic ice-wedge polygon terrain in the Eastern Canadian Arctic (Bylot Island, Nunavut), The Cryosphere Discussions. https://doi.org/10.5194/tc-2019-248

Lanceleur, L., Tessier, E., Bueno, M., Pienitz, R., Bouchard, F., Cloquet, C., Amouroux, D. (2019). Cycling and atmospheric exchanges of selenium in Canadian subarctic thermokarst ponds, Biogeochemistry, 145(1-2), 193-211. https://doi.org/10.1007/s10533-019-00599-w

2018

Roy, N., Woollett, J., Bhiry, N., Haemmerli, G., Forbes, V., Pienitz, R. (2018). Perspective of landscape change following early settlement (landnám) in Svalbarðstunga, northeastern Iceland, Boreas, 47(2), 671-686. https://doi.org/10.1111/bor.12287

2017

Bouchard, F., MacDonald, L.-A., Turner, K.-W., Thienpont, J.-R., Medeiros, A.-S., Biskaborn, B.-K., Korosi, J., Hall, R.-I., Pienitz, R., Wolfe, B.-B. (2017). Paleolimnology of thermokarst lakes: a window into permafrost landscape evolution, Arctic Science, 3(2), 91-117. https://doi.org/10.1139/as-2016-0022

Bouchard, F., Proult, V., Pienitz, R., Antoniades, D., Tremblay, R., Vincent, W.-F. (2017). Periphytic diatom community structure in thermokarst ecosystems of Nunavik (Québec, Canada), Arctic Science AS-2016-0020. https://doi.org/10.1139/AS-2016-0020

MacDonald, L.-A., Wolfe, B.-B., Turner, K.-W., Anderson, L., Arp, C.-D., Birks, S.-J., Bouchard, F., Edwards, T.-W., Farquharson, N., Hall, R.-I., McDonald, I., Narancic, B., Ouimet, C., Pienitz, R., Tondu, J., White, H. (2017). A synthesis of thermokarst lake water balance in high-latitude regions of North America from isotope tracers, Arctic Science, 3(2), 118-149. https://doi.org/10.1139/as-2016-0019

Narancic, B., Wolfe, B.-B., Pienitz, R., Meyer, H., Lamhonwah, D. (2017). Landscape-gradient assessment of thermokarst lake hydrology using water isotope tracers, Journal of Hydrology, 545, 327-338. https://doi.org/10.1016/j.jhydrol.2016.11.028

Normandeau, A., Lajeunesse, P., Trottier, A.-P., Poiré, A.-G., Pienitz, R. (2017). Sedimentation in isolated glaciomarine embayments during glacio-isostatically induced relative sea level fall (northern Champlain Sea basin), Canadian Journal of Earth Sciences, 54(10), 1049-1062. https://doi.org/10.1139/cjes-2017-0002

Pienitz, R., Cournoyer, L. (2017). Circumpolar Diatom Database (CDD): a new database for use in paleolimnology and limnology, Journal of Paleolimnology, 57(2), 213-219. https://doi.org/10.1007/s10933-016-9932-0

Viehberg, F.-A., Pienitz, R. (2017). Trends in Ostracoda and Cladocera distribution and water chemistry in subarctic Canada: Churchill (Manitoba) lakes and ponds revisited, Journal of Limnology, 76(3), 451-468. https://doi.org/10.4081/jlimnol.2017.1578

Winegardner, A.-K., Salter, N., Aebischer, S., Pienitz, R., Derry, A.-M., Wing, B., Beisner, B.-E., Gregory-Eaves, I. (2017). Cladoceran diversity dynamics in lakes from a northern mining region: responses to multiple stressors characterized by alpha and beta diversity, Canadian Journal of Fisheries and Aquatic Sciences, 74(10), 1654-1667. https://doi.org/10.1139/cjfas-2016-0449

2016

Beaudoin, A., Pienitz, R., Francus, P., Zdanowicz, C., St-Onge, G. (2016). Palaeoenvironmental history of the last six centuries in the Nettilling Lake area (Baffin Island, Canada): A multi-proxy analysis, The Holocene, 26(11), 1835-1846. https://doi.org/10.1177/0959683616645937

Chapligin, B., Narancic, B., Meyer, H., Pienitz, R. (2016). Paleo-environmental gateways in the eastern Canadian arctic - Recent isotope hydrology and diatom oxygen isotopes from Nettilling Lake, Baffin Island, Canada, Quaternary Science Reviews, 147, 379-390. https://doi.org/10.1016/j.quascirev.2016.03.028

Coulombe, O., Bouchard, F., Pienitz, R. (2016). Coupling of sedimentological and limnological dynamics in subarctic thermokarst ponds in Northern Québec (Canada) on an interannual basis, Sedimentary Geology, 340, 15-24. https://doi.org/10.1016/j.sedgeo.2016.01.012

Jacques, O., Bouchard, F., MacDonald, L.-A., Hall, R.-I., Wolfe, B.-B., Pienitz, R. (2016). Distribution and diversity of diatom assemblages in surficial sediments of shallow lakes in Wapusk National Park (Manitoba, Canada) region of the Hudson Bay Lowlands, Ecology and Evolution, 6(13), 4526-4540. https://doi.org/10.1002/ece3.2179

Narancic, B., Pienitz, R., Chapligin, B., Meyer, H., Francus, P., Guilbault, J.-P. (2016). Postglacial environmental succession of Nettilling Lake (Baffin Island, Canadian Arctic) inferred from biogeochemical and microfossil proxies, Quaternary Science Reviews, 147, 391-405. https://doi.org/10.1016/j.quascirev.2015.12.022

Richerol, T., Fréchette, B., Rochon, A., Pienitz, R. (2016). Holocene climate history of the Nunatsiavut (northern Labrador, Canada) established from pollen and dinoflagellate cyst assemblages covering the past 7000 years, The Holocene, 26(1), 44-60. https://doi.org/10.1177/0959683615596823

2015

Aebischer, S., Cloquet, C., Carignan, J., Maurice, C., Pienitz, R. (2015). Disruption of the geochemical metal cycle during mining: Multiple isotope studies of lake sediments from Schefferville, subarctic Québec, Chemical Geology, 412, 167-178. https://doi.org/10.1016/j.chemgeo.2015.07.028

Desiage, P.-A., Lajeunesse, P., St-Onge, G., Normandeau, A., Ledoux, G., Guyard, H., Pienitz, R. (2015). Deglacial and postglacial evolution of the Pingualuit Crater Lake basin, northern Québec (Canada), Geomorphology, 248, 327-343. https://doi.org/10.1016/j.geomorph.2015.07.023

Saulnier-Talbot, É., Larocque-Tobler, I., Gregory-Eaves, I., Pienitz, R. (2015). Response of lacustrine biota to late holocene climate and environmental conditions in northernmost ungava (canada), ARCTIC, 68(2), 153. https://doi.org/10.14430/arctic4487

Tremblay, R., Pienitz, R. (2015). Caractéristiques limnologiques de 56 lacs du Québec méridional en lien avec l'état trophique, Revue des sciences de l'eau, 28(2), 139-162. https://doi.org/10.7202/1032295ar

Zimmermann, C., Jouve, G., Pienitz, R., Francus, P., Maidana, N.-I. (2015). Late Glacial and Early Holocene cyclic changes in paleowind conditions and lake levels inferred from diatom assemblage shifts in Laguna Potrok Aike sediments (southern Patagonia, Argentina), Palaeogeography, Palaeoclimatology, Palaeoecology, 427, 20-31. https://doi.org/10.1016/j.palaeo.2015.03.006

2014

Bouchard, F., Francus, P., Pienitz, R., Laurion, I., Feyte, S. (2014). Subarctic thermokarst ponds: Investigating recent landscape evolution and sediment dynamics in thawed permafrost of northern québec (canada), Arctic, Antarctic, and Alpine Research, 46(1), 251-271. https://doi.org/10.1657/1938-4246-46.1.251

Deshpande, B.-N., Tremblay, R., Pienitz, R., Vincent, W.-F. (2014). Sedimentary pigments as indicators of cyanobacterial dynamics in a hypereutrophic lake, Journal of Paleolimnology, 52(3), 171-184. https://doi.org/10.1007/s10933-014-9785-3

Guyard, H., Francus, P., St-Onge, G., Hausmann, S., Pienitz, R. (2014). Microfacies and microstructures of subglacial and deglacial sediments from the Pingualuit Crater Lake (Ungava Peninsula, Canada), Canadian Journal of Earth Sciences, 51(12), 1084-1096. https://doi.org/10.1139/cjes-2014-0041

Richerol, T., Pienitz, R., Rochon, A. (2014). Recent anthropogenic and climatic history of Nunatsiavut fjords (Labrador, Canada), Paleoceanography, 29(9), 869-892. https://doi.org/10.1002/2014PA002624

Tremblay, R., Pienitz, R., Legendre, P. (2014). Reconstructing phosphorus levels using models based on the modern diatom assemblages of 55 lakes in southern Quebec, Canadian Journal of Fisheries and Aquatic Sciences, 71(6), 887-914. https://doi.org/10.1139/cjfas-2013-0469

Voit, A.-C., Hebda, R.-J., Racca, J.-M., Pienitz, R., Walker, I.-R., Raeder, U., Heinrichs, M.-L. (2014). Post-glacial diatom-inferred aquatic changes in sicamous creek lake, british columbia, canada, Revue des sciences de l'eau, 27(3), 233-256. https://doi.org/10.7202/1027808ar

2013

Bouchard, F., Pienitz, R., Ortiz, J.-D., Francus, P., Laurion, I. (2013). Palaeolimnological conditions inferred from fossil diatom assemblages and derivative spectral properties of sediments in thermokarst ponds of subarctic Quebec, Canada, Boreas, 42(3), 575-595. https://doi.org/10.1111/bor.12000

Luoto, T.-P., Salonen, V.-P., Larocque-Tobler, I., Pienitz, R., Hausmann, S., Guyard, H., St-Onge, G. (2013). Pro- and postglacial invertebrate communities of Pingualuit Crater Lake, Nunavik (Canada), and their paleoenvironmental implications, Freshwater Science, 32(3), 951-963. https://doi.org/10.1899/12-178.1

2012

Black, J.-L., Edlund, M.-B., Hausmann, S., Pienitz, R. (2012). Small freshwater thalassiosiroid diatoms from Pleistocene sediments of Pingualuit Crater Lake, northern Québec (Canada), including description of Cyclotella pingualuitii sp. nov., Diatom Research, 27(1), 53-63. https://doi.org/10.1080/0269249X.2012.654825

Gantner, N., Veillette, J., Michaud, W.-K., Bajno, R., Muir, D., Vincent, W.-C., Power, M., Dixon, B., Reist, J.-D., Hausmann, S., Pienitz, R. (2012). Physical and biological factors affecting mercury and perfluorinated contaminants in arctic char (Salvelinus alpinus) of pingualuit crater lake (nunavik, canada) + supplementary appendices (see article tools), ARCTIC, 65(2),. https://doi.org/10.14430/arctic4200

Labrecque, V., Nürnberg, G., Tremblay, R., Pienitz, R. (2012). Caractérisation de la charge interne de phosphore du lac Nairne, Charlevoix (Québec), Revue des sciences de l'eau, 25(1), 77-93. https://doi.org/10.7202/1008537ar

Richerol, T., Pienitz, R., Rochon, A. (2012). Modern dinoflagellate cyst assemblages in surface sediments of Nunatsiavut fjords (Labrador, Canada), Marine Micropaleontology, 88-89, 54-64. https://doi.org/10.1016/j.marmicro.2012.03.002

2011

Antoniades, D., Michelutti, N., Quinlan, R., Blais, J.-M., Bonilla, S., Douglas, M.-S.-V., Pienitz, R., Smol, J.-P., Vincent, W.-F. (2011). Cultural eutrophication, anoxia, and ecosystem recovery in meretta lake, high arctic canada, Limnology and Oceanography, 56(2), 639-650. https://doi.org/10.4319/lo.2011.56.2.0639

Bhiry, N., Delwaide, A., Allard, M., Bégin, Y., Filion, L., Lavoie, M., Nozais, C., Payette, S., Pienitz, R., Saulnier-Talbot, É., Vincent, W.-F. (2011). Environmental change in the great whale river region, hudson bay: Five decades of multidisciplinary research by centre d'études nordiques (CEN), Écoscience, 18(3), 182-203. https://doi.org/10.2980/18-3-3469

Bouchard, F., Francus, P., Pienitz, R., Laurion, I. (2011). Sedimentology and geochemistry of thermokarst ponds in discontinuous permafrost, subarctic Quebec, Canada, Journal of Geophysical Research, 116, G00M04. https://doi.org/10.1029/2011JG001675

Hausmann, S., Larocque-Tobler, I., Richard, P.-J., Pienitz, R., St-Onge, G., Fye, F. (2011). Diatom-inferred wind activity at Lac du Sommet, southern Québec, Canada: A multiproxy paleoclimate reconstruction based on diatoms, chironomids and pollen for the past 9500 years, The Holocene, 21(6), 925-938. https://doi.org/10.1177/0959683611400199

Kirk, J.-L., Muir, D.-C.-M., Antoniades, D., Douglas, M.-S.-V., Evans, M.-S., Jackson, T.-A., Kling, H., Lamoureux, S., Lim, D.-S.-S., Pienitz, R., Smol, J.-P., Stewart, K., Wang, X., Yang, F. (2011). Climate change and mercury accumulation in canadian high and subarctic lakes, Environmental Science & Technology, 45(3), 964-970. https://doi.org/10.1021/es102840u

Prowse, T., Alfredsen, K., Beltaos, S., Bonsal, B., Duguay, C., Korhola, A., McNamara, J., Pienitz, R., Vincent, W.-F., Vuglinsky, V., Weyhenmeyer, G.-A. (2011). Past and future changes in arctic lake and river ice, AMBIO, 40(S1), 53-62. https://doi.org/10.1007/s13280-011-0216-7

Rosén, P., Vogel, H., Cunningham, L., Hahn, A., Hausmann, S., Pienitz, R., Zolitschka, B., Wagner, B., Persson, P. (2011). Universally applicable model for the quantitative determination of lake sediment composition using fourier transform infrared spectroscopy, Environmental Science & Technology, 45(20), 8858-8865. https://doi.org/10.1021/es200203z

Rouillard, A., Rosén, P., Douglas, M.-S.-V., Pienitz, R., Smol, J.-P. (2011). A model for inferring dissolved organic carbon (DOC) in lakewater from visible-near-infrared spectroscopy (VNIRS) measures in lake sediment, Journal of Paleolimnology, 46(2), 187-202. https://doi.org/10.1007/s10933-011-9527-8

Watanabe, S., Laurion, I., Chokmani, K., Pienitz, R., Vincent, W.-F. (2011). Optical diversity of thaw ponds in discontinuous permafrost: A model system for water color analysis, Journal of Geophysical Research, 116(G2), G02003. https://doi.org/10.1029/2010JG001380

2010

Côté, G., Pienitz, R., Velle, G., Wang, X. (2010). Impact of geese on the limnology of lakes and ponds from bylot island (nunavut, canada), International Review of Hydrobiology, 95(2), 105-129. https://doi.org/10.1002/iroh.200911151

Laurion, I., Vincent, W.-F., MacIntyre, S., Retamal, L., Dupont, C., Francus, P., Pienitz, R. (2010). Variability in greenhouse gas emissions from permafrost thaw ponds, Limnology and Oceanography, 55(1), 115-133. https://doi.org/10.4319/lo.2010.55.1.0115

Saulnier-Talbot, É., Pienitz, R. (2010). Postglacial chironomid assemblage succession in northernmost Ungava Peninsula, Canada, Journal of Quaternary Science, 25(2), 203-213. https://doi.org/10.1002/jqs.1296

2009

Antoniades, D., Veillette, J., Martineau, M.-J., Belzile, C., Tomkins, J., Pienitz, R., Lamoureux, S., Vincent, W.-F. (2009). Bacterial dominance of phototrophic communities in a High Arctic lake and its implications for paleoclimate analysis, Polar Science, 3(3), 147-161. https://doi.org/10.1016/j.polar.2009.05.002

Hausmann, S., Pienitz, R. (2009). Seasonal water chemistry and diatom changes in six boreal lakes of the Laurentian Mountains (Québec, Canada): impacts of climate and timber harvesting, Hydrobiologia, 635(1), 1-14. https://doi.org/10.1007/s10750-009-9855-0

Hay, M.-B., Calvert, S.-E., Pienitz, R., Dallimore, A., Thomson, R.-E., Baumgartner, T.-R. (2009). Geochemical and diatom signatures of bottom water renewal events in Effingham Inlet, British Columbia (Canada), Marine Geology, 262(1-4), 50-61. https://doi.org/10.1016/j.margeo.2009.03.004

Pienitz, R., Lotter, A.-F. (2009). Editorial: Advances in paleolimnology, PAGES news, 17(3), 92-93. https://doi.org/10.22498/pages.17.3.92

Pienitz, R., Melles, M., Zolitschka, B. (2009). Results of recent sediment drilling activities in deep crater lakes, PAGES news, 17(3), 117-118. https://doi.org/10.22498/pages.17.3.117

Rolland, N., Larocque, I., Francus, P., Pienitz, R., Laperrière, L. (2009). Evidence for a warmer period during the 12th and 13th centuries AD from chironomid assemblages in Southampton Island, Nunavut, Canada, Quaternary Research, 72(1), 27-37. https://doi.org/10.1016/j.yqres.2009.03.001

Saulnier-Talbot, É., Pienitz, R., Stafford Jr., T.-W. (2009). Establishing Holocene sediment core chronologies for northern Ungava lakes, Canada, using humic acids (AMS 14C) and 210Pb, Quaternary Geochronology, 4(4), 278-287. https://doi.org/10.1016/j.quageo.2009.02.018

2008

Antoniades, D., Crawley, C., Douglas, M.-S.-V., Pienitz, R., Andersen, D., Doran, P.-T., Hawes, I., Pollard, W., Vincent, W.-F. (2008). Reply to comment by K. Gajewski on "Abrupt environmental change in Canada's northernmost lake”, Geophysical Research Letters, 35(8), L08702. https://doi.org/10.1029/2007GL032889

Dallimore, A., Enkin, R.-J., Pienitz, R., Southon, J.-R., Baker, J., Wright, C.-A., Pedersen, T.-F., Calvert, S.-E., Ivanochko, T., Thomson, R.-E. (2008). Postglacial evolution of a Pacific coastal fjord in British Columbia, Canada: interactions of sea-level change, crustal response, and environmental fluctuations — results from MONA core MD02-2494This article is one of a series of papers published in this, Canadian Journal of Earth Sciences, 45(11), 1345-1362. https://doi.org/10.1139/E08-042

Laperrière, L., Fallu, M.-A., Hausmann, S., Pienitz, R., Muir, D. (2008). Paleolimnological evidence of mining and demographic impacts on Lac Dauriat, Schefferville (subarctic Québec, Canada), Journal of Paleolimnology, 40(1), 309-324. https://doi.org/10.1007/s10933-007-9162-6

Rolland, N., Larocque, I., Francus, P., Pienitz, R., Laperrière, L. (2008). Holocene climate inferred from biological (diptera: Chironomidae) analyses in a southampton island (nunavut, canada) lake, The Holocene, 18(2), 229-241. https://doi.org/10.1177/0959683607086761

2007

Antoniades, D., Crawley, C., Douglas, M.-S.-V., Pienitz, R., Andersen, D., Doran, P.-T., Hawes, I., Pollard, W., Vincent, W.-F. (2007). Abrupt environmental change in Canada's northernmost lake inferred from fossil diatom and pigment stratigraphy, Geophysical Research Letters, 34(18), L18708. https://doi.org/10.1029/2007GL030947

Hausmann, S., Pienitz, R. (2007). Seasonal climate inferences from high-resolution modern diatom data along a climate gradient: a case study, Journal of Paleolimnology, 38(1), 73-96. https://doi.org/10.1007/s10933-006-9061-2

Hay, M.-B., Dallimore, A., Thomson, R.-E., Calvert, S.-E., Pienitz, R. (2007). Siliceous microfossil record of late Holocene oceanography and climate along the west coast of Vancouver Island, British Columbia (Canada), Quaternary Research, 67(1), 33-49. https://doi.org/10.1016/j.yqres.2006.08.002

Racca, J.-M.-J., Racca, R., Pienitz, R., Prairie, Y.-T. (2007). PaleoNet: new software for building, evaluating and applying neural network based transfer functions in paleoecology, Journal of Paleolimnology, 38(3), 467-472. https://doi.org/10.1007/s10933-006-9082-x

Saulnier-Talbot, É., Leng, M.-J., Pienitz, R. (2007). Recent climate and stable isotopes in modern surface waters of northernmost Ungava Peninsula, Canada, Canadian Journal of Earth Sciences, 44(2), 171-180. https://doi.org/10.1139/e06-089

2006

Kdster, D., Pienitz, R. (2006). Late-Holocene environmental history of two New England ponds: natural dynamics versus human impacts, The Holocene, 16(4), 519-532. https://doi.org/10.1191/0959683606hl947rp

Köster, D., Pienitz, R. (2006). Seasonal diatom variability and paleolimnological inferences - a case study, Journal of Paleolimnology, 35(2), 395-416. https://doi.org/10.1007/s10933-005-1334-7

Larocque, I., Pienitz, R., Rolland, N. (2006). Factors influencing the distribution of chironomids in lakes distributed along a latitudinal gradient in northwestern Quebec, Canada, Canadian Journal of Fisheries and Aquatic Sciences, 63(6), 1286-1297. https://doi.org/10.1139/f06-020

Lavoie, C., Pienitz, R., Allard, M. (2006). Diatom flora of the Nastapoka River delta: an emerging coastal system on the eastern shore of Hudson Bay, subarctic Québec, Nova Hedwigia, 83(1), 31-51. https://doi.org/10.1127/0029-5035/2006/0083-0031

Pienitz, R., Roberge, K., Vincent, W.-F. (2006). Three hundred years of human-induced change in an urban lake: paleolimnological analysis of Lac Saint-Augustin, Québec City, Canada, Canadian Journal of Botany, 84(2), 303-320. https://doi.org/10.1139/b05-152

2005

Fallu, M.-A., Pienitz, R., Walker, I.-R., Lavoie, M. (2005). Paleolimnology of a shrub-tundra lake and response of aquatic and terrestrial indicators to climatic change in arctic Québec, Canada, Palaeogeography, Palaeoclimatology, Palaeoecology, 215(3-4), 183-203. https://doi.org/10.1016/j.palaeo.2004.07.006

Köster, D., Pienitz, R., Wolfe, B.-B., Barry, S., Foster, D.-R., Dixit, S.-S. (2005). Paleolimnological assessment of human-induced impacts on Walden Pond (Massachusetts, USA) using diatoms and stable isotopes, Aquatic Ecosystem Health & Management, 8(2), 117-131. https://doi.org/10.1080/14634980590953743

Smol, J.-P., Wolfe, A.-P., Birks, H.-J.-B., Douglas, M.-S.-V., Jones, V.-J., Korhola, A., Pienitz, R., Ruhland, K., Sorvari, S., Antoniades, D., Brooks, S.-J., Fallu, M.-A., Hughes, M., Keatley, B.-E., Laing, T.-E., Michelutti, N., Nazarova, L., Nyman, M., Paterson, A.-M., Perren, B., Quinlan, R., Rautio, M., Saulnier-Talbot, E., Siitonen, S., Solovieva, N., Weckstrom, J. (2005). Climate-driven regime shifts in the biological communities of arctic lakes, Proceedings of the National Academy of Sciences, 102(12), 4397-4402. https://doi.org/10.1073/pnas.0500245102

Swadling, K.-M., Gibson, J.-A.-E., Pienitz, R., Vincent, W.-F. (2005). Biogeography of copepods in lakes and ponds of subarctic Québec, Canada, Copepoda: Developments in Ecology, Biology and Systematics, 453, 341-350. https://doi.org/10.1023/A:1013125632217

2004

Fallu, M.-A., Pienitz, R., Walker, I.-R., Overpeck, J. (2004) AMS 14 C dating of tundra lake sediments using chironomid head capsules, Journal of Paleolimnology, 31(1), 11-22. https://doi.org/10.1023/B:JOPL.0000013271.66605.68

Köster, D., Racca, J.-M.-J., Pienitz, R. (2004) Diatom-based inference models and reconstructions revisited: methods and transformations, Journal of Paleolimnology, 32(3), 233-246. https://doi.org/10.1023/B:JOPL.0000042907.90500.5a

Lavoie, I., Vincent, W.-F., Pienitz, R., Painchaud, J. (2004) Benthic algae as bioindicators of agricultural pollution in the streams and rivers of southern Québec (Canada), Aquatic Ecosystem Health & Management, 7(1), 43-58. https://doi.org/10.1080/14634980490281236

Racca, J.-M., Gregory-Eaves, I., Pienitz, R., Prairie, Y.-T. (2004) Tailoring palaeolimnological diatom-based transfer functions, Canadian Journal of Fisheries and Aquatic Sciences, 61(12), 2440-2454. https://doi.org/10.1139/f04-162

2003

Hay, M.-B., Pienitz, R., Thomson, R.-E. (2003). Distribution of diatom surface sediment assemblages within Effingham Inlet, a temperate fjord on the west coast of Vancouver Island (Canada), Marine Micropaleontology, 48(3-4), 291-320. https://doi.org/10.1016/S0377-8398(03)00025-2

Rühland, K.-M., Smol, J.-P., Pienitz, R. (2003). Ecology and spatial distributions of surface-sediment diatoms from 77 lakes in the subarctic Canadian treeline region, Canadian Journal of Botany, 81(1), 57-73. https://doi.org/10.1139/b03-005

Saulnier-Talbot, É., Pienitz, R., Vincent, W.-F. (2003). Holocene lake succession and palaeo-optics of a Subarctic lake, northern Québec, Canada, The Holocene, 13(4), 517-526. https://doi.org/10.1191/0959683603hl641rp

Walker, I.-R., Levesque, A., Pienitz, R., Smol, J.-P. (2003). Freshwater midges of the Yukon and adjacent Northwest Territories: a new tool for reconstructing Beringian paleoenvironments?, Journal of the North American Benthological Society, 22(2), 323-337. https://doi.org/10.2307/1468001

2002

Fallu, M.-A., Allaire, N., Pienitz, R. (2002). Distribution of freshwater diatoms in 64 Labrador (Canada) lakes: speciesenvironment relationships along latitudinal gradients and reconstruction models for water colour and alkalinity, Canadian Journal of Fisheries and Aquatic Sciences, 59(2), 329-349. https://doi.org/10.1139/f01-211

Laing, T.-E., Pienitz, R., Payette, S. (2002). Evaluation of limnological responses to recent environmental change and caribou activity in the rivière george region, northern québec, canada, Arctic, Antarctic, and Alpine Research, 34(4), 454-464. https://doi.org/10.1080/15230430.2002.12003517

Ponader, K., Pienitz, R., Vincent, W., Gajewski, K. (2002). Limnological conditions in a subarctic lake (northern Québec, Canada) during the late Holocene: Analyses based on fossil diatoms, Journal of Paleolimnology, 27, 353-366. https://doi.org/10.1023/A:1016033028144

2000

Campeau, S., Héquette, A., Pienitz, R. (2000). Late Holocene diatom biostratigraphy and sea-level changes in the southeastern Beaufort Sea, Canadian Journal of Earth Sciences, 37(1), 63-80. https://doi.org/10.1139/e99-107

Gibson, J.-A., Vincent, W.-F., Nieke, B., Pienitz, R. (2000). Control of biological exposure to UV radiation in the arctic ocean: Comparison of the roles of ozone and riverine dissolved organic matter, ARCTIC, 53(4),. https://doi.org/10.14430/arctic868

Pienitz, R., Smol, J.-P., Last, W.-M., Leavitt, P.-R., Cumming, B.-F. (2000). Multi-proxy Holocene palaeoclimatic record from a saline lake in the Canadian Subarctic, The Holocene, 10(6), 673-686. https://doi.org/10.1191/09596830094935

Pienitz, R., Vincent, W.-F. (2000). Effect of climate change relative to ozone depletion on UV exposure in subarctic lakes, Nature, 404(6777), 484-487. https://doi.org/10.1038/35006616

Swadling, K.-M., Pienitz, R., Nogrady, T. (2000). Zooplankton community composition of lakes in the Yukon and Northwest territories (Canada): Relationship to physical and chemical limnology, Hydrobiologia, 431, 211-224. https://doi.org/10.1023/A:1004056715976

1999

Campeau, S., Pienitz, R., Héquette, A. (1999). Diatoms as quantitative paleodepth indicators in coastal areas of the southeastern Beaufort Sea, Arctic Ocean, Palaeogeography, Palaeoclimatology, Palaeoecology, 146(1-4), 67-97. https://doi.org/10.1016/S0031-0182(98)00143-6

Fallu, M.-A., Pienitz, R. (1999). Diatomées lacustres de Jamésie-Hudsonie (Québec) et modèle de reconstitution des concentrations de carbone organique dissous, Écoscience, 6(4), 603-620. https://doi.org/10.1080/11956860.1999.11682553

Laing, T.-E., Pienitz, R., Smol, J.-P. (1999). Freshwater diatom assemblages from 23 lakes located near Norilsk, Siberia: A comparision with assemblages from other circumpolar treeline regions, Diatom Research, 14(2), 285-305. https://doi.org/10.1080/0269249X.1999.9705471

Pienitz, R., Smol, J.-P., MacDonald, G.-M. (1999). Paleolimnological reconstruction of holocene climatic trends from two boreal treeline lakes, northwest territories, canada, Arctic, Antarctic, and Alpine Research, 31(1), 82. https://doi.org/10.2307/1552625

1998

Vincent, W.-F., Laurion, I., Pienitz, R. (1998). Arctic and Antarctic lakes as optical indicators of global change, Annals of Glaciology, 27, 691-696. https://doi.org/10.3189/1998AoG27-1-691-696

Villeneuve, V., Pienitz, R. (1998). Composition diatomifère de quatre sources thermales au Canada, en Islande et au Japon, Diatom Research, 13(1), 149-175. https://doi.org/10.1080/0269249X.1998.9705440

1997

Josenhans, H., Fedje, D., Pienitz, R., Southon, J. (1997). Early humans and rapidly changing holocene sea levels in the queen charlotte islands-hecate strait, british columbia, canada, Science, 277(5322), 71-74. https://doi.org/10.1126/science.277.5322.71

Pienitz, R., Smol, J.-P., Lean, D.-R. (1997). Physical and chemical limnology of 24 lakes located between Yellowknife and Contwoyto Lake, Northwest Territories (Canada), Canadian Journal of Fisheries and Aquatic Sciences, 54(2), 347-358. https://doi.org/10.1139/cjfas-54-2-347

Pienitz, R., Smol, J.-P., Lean, D.-R. (1997). Physical and chemical limnology of 59 lakes located between the southern Yukon and the Tuktoyaktuk Peninsula, Northwest Territories (Canada), Canadian Journal of Fisheries and Aquatic Sciences, 54(2), 330-346. https://doi.org/10.1139/f96-274

1996

Vincent, W.-F., Pienitz, R. (1996). Sensitivity of high-latitude freshwater ecosystems to global change: Temperature and solar ultraviolet radiation, Geoscience Canada, 23(4),. https://doi.org/

1995 and before

Pienitz, R., Douglas, M.-S.-V., Smol, J.-P., Huttunen, P., Merilainen, J. (1995). Diatom, chrysophyte and protozoan distributions along a latitudinal transect in Fennoscandia, Ecography, 18(4), 429-439. https://doi.org/10.1111/j.1600-0587.1995.tb00146.x

Pienitz, R., Smol, J.-P., Birks, H.-J.-B. (1995). Assessment of freshwater diatoms as quantitative indicators of past climatic change in the Yukon and Northwest Territories, Canada, Journal of Paleolimnology, 13(1), 21-49. https://doi.org/10.1007/BF00678109

MacDonald, G.-M., Edwards, T.-W.-D., Moser, K.-A., Pienitz, R., Smol, J.-P. (1993). Rapid response of treeline vegetation and lakes to past climate warming, Nature, 361(6409), 243-246. https://doi.org/10.1038/361243a0

Pienitz, R., Smol, J.-P. (1993). Diatom assemblages and their relationship to environmental variables in lakes from the boreal forest-tundra ecotone near Yellowknife, Northwest Territories, Canada, Hydrobiologia, 269-270(1), 391-404. https://doi.org/10.1007/BF00028037

Book chapters:

Vincent, W.-F., Laurion, I., Pienitz, R., Walter Anthony, K.-M. (2012). Climate impacts on arctic lake ecosystems, Climatic change and global warming of inland waters 27-42. http://www.cen.ulaval.ca/warwickvincent/PDFfiles/296.pdf

Lotter, A.-F., Pienitz, R., Schmidt, R. (2010). Diatoms as indicators of environmental change near arctic and alpine treeline, The diatoms 205-226. https://doi.org/10.1017/CBO9780511613005.010

Lotter, A.-F., Pienitz, R., Schmidt, R. (2010). Diatoms as indicators of environmental change in subarctic and alpine regions, The diatoms 231-248. https://doi.org/10.1017/CBO9780511763175.013

Bahls, L., Potapova, M., Fallu, M.-A., Pienitz, R. (2009). Aulacoseira canadensis and aulacoseira crassipunctata (bacillariophyta) in north america, Nova hedwigia 167-184. https://doi.org/

Pienitz, R., Doran, P.-T., Lamoureux, S.-F. (2008). Origin and geomorphology of lakes in the polar regions, Polar lakes and rivers 25-42. https://doi.org/10.1093/acprof:oso/9780199213887.003.0002

Leavitt, P.-R., Hodgson, D.-A., Pienitz, R. (2007). Past UVR environments and impacts on lakes, UV effects in aquatic organisms and ecosystems 509-546. https://doi.org/10.1039/9781847552266-00509

Pienitz, R., Douglas, M.-S.-V., Smol, J.-P. (2007). Epilogue: Paleolimnological research from arctic and antarctic regions, Long-term environmental change in arctic and antarctic lakes 509-540. https://doi.org/10.1007/978-1-4020-2126-8_16

Pienitz, R., Douglas, M.-S.-V., Smol, J.-P. (2007). Paleolimnological research in polar regions: An introduction, Long-term environmental change in arctic and antarctic lakes 1-17. https://doi.org/10.1007/978-1-4020-2126-8_1

Vincent, W.-F., Rautio, M., Pienitz, R. (2007). Climate control of biological UV exposure in polar and alpine aquatic ecosystems, Arctic alpine ecosystems and people in a changing environment 227-249. https://doi.org/10.1007/978-3-540-48514-8_14

Pienitz, R., Vincent, W.-F. (2003). Generic approaches towards water quality monitoring based on paleolimnology, Freshwater management: global versus local perspectives 61-82. http://www.cen.ulaval.ca/warwickvincent/PDFfiles/171.pdf

Robarts, R.-D., Fraser, A.-S., Hodgson, K.-M., Paquette, G.-M., Frenette, J.-J., Vincent, W.-F., Pienitz, R. (2003). Perspectives on environmental monitoring, Freshwater management 23-82. https://doi.org/10.1007/978-4-431-68436-7_2