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Département de Biologie /
Pavillon Alexandre-Vachon
1045, av. de la Médecine, local 2064
Université Laval
Québec (Québec) G1V 0A6
Phone : +1 418 656 2131 ext. 404880


Reinhard Pienitz

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Professor (ULaval)
Director of the M.Sc. in environmental biogeosciences / Paleolimnology

Phone : 418-656-2131 ext. 407006

Research Interests

Professor in the Department of Geography, Dr. Reinhard Pienitz leads the Aquatic Paleoecology Laboratory 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.


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

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)
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


10 most significant scientific contributions in Quebec selected by independent panel

10 most significant scientific contributions in Quebec selected by independent panel

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

10 most significant scientific contributions in Quebec selected by independent panel



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.

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.

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.

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.

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.


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).

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.

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).

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.

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.


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.

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.

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.

Pienitz, R., & Jacques, O. (2020). Sedimentological and limnological evolution of recreational lakes in a former asbestos mining region (Québec, Canada): Insights from paleolimnology. 3741.

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.


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.

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.


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.


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.

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.

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.

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.

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.

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.

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.

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.


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.

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.

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.

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.

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.

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.


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.

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.

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.

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.

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.


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.

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.

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.

Richerol, T., Pienitz, R., Rochon, A. (2014). Recent anthropogenic and climatic history of Nunatsiavut fjords (Labrador, Canada), Paleoceanography, 29(9), 869-892.

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.

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.


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.

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.


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.

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),.

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.

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.


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.

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.

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.

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.

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.

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.

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.

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.

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.


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.

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.

Saulnier-Talbot, É., Pienitz, R. (2010). Postglacial chironomid assemblage succession in northernmost Ungava Peninsula, Canada, Journal of Quaternary Science, 25(2), 203-213.


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.

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.

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.

Pienitz, R., Lotter, A.-F. (2009). Editorial: Advances in paleolimnology, PAGES news, 17(3), 92-93.

Pienitz, R., Melles, M., Zolitschka, B. (2009). Results of recent sediment drilling activities in deep crater lakes, PAGES news, 17(3), 117-118.

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.

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.


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.

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.

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.

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.


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.

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.

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.

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.

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.


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.

Köster, D., Pienitz, R. (2006). Seasonal diatom variability and paleolimnological inferences - a case study, Journal of Paleolimnology, 35(2), 395-416.

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.

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.

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.


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.

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.

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.

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.


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.

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.

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.

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.


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.

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.

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.

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.


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.

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.

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.


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.

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),.

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.

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.

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.


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.

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.

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.

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.


Vincent, W.-F., Laurion, I., Pienitz, R. (1998). Arctic and Antarctic lakes as optical indicators of global change, Annals of Glaciology, 27, 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.


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.

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.

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.


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

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.

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.

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.

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.

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.

Lotter, A.-F., Pienitz, R., Schmidt, R. (2010). Diatoms as indicators of environmental change near arctic and alpine treeline, The diatoms 205-226.

Lotter, A.-F., Pienitz, R., Schmidt, R. (2010). Diatoms as indicators of environmental change in subarctic and alpine regions, The diatoms 231-248.

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

Pienitz, R., Doran, P.-T., Lamoureux, S.-F. (2008). Origin and geomorphology of lakes in the polar regions, Polar lakes and rivers 25-42.

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.

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.

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.

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.

Pienitz, R., Vincent, W.-F. (2003). Generic approaches towards water quality monitoring based on paleolimnology, Freshwater management: global versus local perspectives 61-82.

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.