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Reinhard Pienitz


Regular member

Department of geography, Université Laval

Abitibi-Price Building
2405 rue de la Terrasse
Université Laval
Quebec, Canada
G1V 0A6

418.656.2131 extension 407006




Research Themes

  • Lakes bio-optics and paleo-optics in northern ecotones.
  • Late Pleistocene paleoclimate of eastern Beringia.
  • Paleoecology and biogeography of diatoms and invertebrates in Quebec-Labrador.
  • Paleoenvironmental study of sediments from the St. Lawrence Gulf.
  • Paleolimnological study of the eutrophication history of Lake Saint-Charles, Quebec.
  • Paleoproductivity of Late Holocene diatoms and silicoflagellates at Effingham Inlet, Canadian west coast.
  • Present and Holocene dynamics of lacustrine ecosystems in Quebec-Labrador.

CEN Students / Postdoctoral fellows

Alibert, Marie (Doctorate). Impacts of climate change and human activity on the lakes of northern Quebec: limnological evidence.

Bourget, Sébastien (Doctorate - Codirector). Development of models based on biological indicators for the reconstruction of environmental change in South-West Nunavik, Québec.

Gnjato, Slobodan (Doctorate - Codirector). Paleolimnological comparison of two postglacial regions: the eastern Canadian Arctic and the northern Mediterranean.

Latourelle-Vigeant, Camille (Master). Paleolimnological reconstruction of postglacial coastal subarctic paleoenvironments and paleoclimates, Dog Island, Labrador .

Narancic, Biljana (Post-Doctorate fellow - Codirector). Millennial study climate change in the Eastern Canadian Arctic using diatom assemblages and oxygen stable isotopes .

Nayebzadeh, Farrin (Doctorate - Codirector). Analysis of the ecological footprint of the cities of Quebec and Lévis on the health of the St. Lawrence River.


Recent CEN theses

Cyr-Parent, Isabelle , 2020 (Master - Codirection). Dynamic of peatlands in relation to climate change and human occupation: The case of Svalbard glacial valley in Northeastern Iceland .

El Haddaoui, Ismail , 2020 (Master). Paleoenvironmental reconstruction of the Foxe Basin area (Nunavut).

Adaïmé, Marc-Élie , 2019 (Master). Paleolimnological reconstruction of postglacial paleoclimate and landscape evolution of the Fury and Hecla Strait region, Nunavut .

Jacques, Olivier , 2018 (Master). Paleolimnological reconstruction of the trophic history of Lake Carheil, Fermont (Quebec, Canada) .

Narancic, Biljana , 2017 (Doctorate). Chemical and biological indicators of environmental change in the lakes of the Eastern Canadian Arctic.


Scientific communications

Adaïmé, M.-É., Pienitz, R., Legendre, P., Antoniades, D., 2021. Postglacial paleoenvironmental reconstruction of the Fury and Hecla Strait region (Nunavut) inferred from microfossils and geochemical proxies. Journal of Quaternary Science(published online 2021-03-09). DOI: 10.1002/jqs.3287.

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. DOI: 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. DOI: 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.J., 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., Płóciennik, M., Porinchu, D., Potito, A., Rees, A., Reinemann, S., Roberts, S., Rolland, N., Salonen, S., Self, A., Seppä, H., Shala, S., St-Jacques, J.-M., Stenni, B., Syrykh, L., Tarrats, P., Taylor, K., van den Bos, V., Velle, G., Wahl, E., Walker, I.R., Wilmshurst, J., Zhang, E., Zhilich, S., 2020. A global database of Holocene paleotemperature records. Scientific Data, 7, 115. DOI: 10.1038/s41597-020-0445-3.

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. DOI: 10.1111/gcb.15016.

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. DOI: 10.1007/s10533-019-00599-w.

Bouchard, F., Proult, V., Pienitz, R., Antoniades, D., Tremblay, R., Vincent, W.F., 2018. Periphytic diatom community structure in thermokarst ecosystems of Nunavik (Québec, Canada). Arctic Science, 4(1): 110-129. DOI: 10.1139/AS-2016-0020.

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. DOI: 10.1111/bor.12287.

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

MacDonald, L.A., Wolfe, B.B., Turner, K.W., Anderson, L., Arp, C.D., Birks, S.J., Medeiros, A.S., Bouchard, F., Edwards, T.W.D., Farquharson, N., Hall, R., 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. DOI: 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. DOI: 10.1016/j.jhydrol.2016.11.028.

Normandeau, A., Lajeunesse, P., Trottier, A.-P., Gagnon-Poiré, A., 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. DOI: 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. DOI: 10.1007/s10933-016-9932-0.

Viehberg, F., 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. DOI: 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. DOI: 10.1139/cjfas-2016-0449.

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. DOI: 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. DOI: 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. DOI: 10.1016/j.sedgeo.2016.01.012.

Jacques, O., Bouchard, F., MacDonald, L.A., Hall, R., 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. DOI: 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(Special Issue: PAST Gateways): 391-405. DOI: 10.1016/j.quascirev.2015.12.022.

Pienitz, R., Zimmermann, C. (Editors), 2016. Program & Abstracts, 24th International Diatom Symposium, Québec, Canada, 21-26 August 2016. Université Laval. 271 pages.

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. DOI: 10.1177/0959683615596823.

Tremblay, R., Pienitz, R., 2016. Interroger les diatomées pour mieux comprendre la santé des lacs du Québec. In Vivo, 36(2): 9-11.

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. DOI: 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. DOI: 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): 153-168. DOI: 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 / Journal of Water Science, 28(2): 139-162. DOI: 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. DOI: 10.1016/j.palaeo.2015.03.006.

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, 40(1): 259-280. DOI: 10.1657/1938-4246-46.1.259.

Deshpande, B., 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. DOI: 10.1007/s10933-014-9785-3.

Guyard, H., St-Onge, G., Francus, P., Pienitz, R., Hausmann, S., 2014. Microfacies and microstructures of subglacial and deglacial sediments from the Pingualuit Crater Lake (Ungava Peninsula, Canada). Canadian Journal of Earth Sciences, 51: 1084-1096. DOI: 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. DOI: 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 Québec. Canadian Journal of Fisheries and Aquatic Sciences, 71: 887–914. DOI: 10.1139/cjfas-2013-0469.

Voit, A.C., Hebda, R.J., Racca, J.M.J., 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 / Journal of Water Science, 27(3): 233-256. DOI: 10.7202/1027808ar.

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: 575-595. DOI: 10.1111/bor.12000.

Bouchard, F., Turner, K.W., MacDonald, L.A., Deakin, C., White, H., Farquharson, N., Medeiros, A.S., Wolfe, B.B., Hall, R., Pienitz, R., Edwards, T.W.D., 2013. Vulnerability of shallow subarctic lakes to evaporate and desiccate when snowmelt runoff is low. Geophysical Research Letters, 40(23): 6112-6117. DOI: 10.1002/2013GL058635.

Luoto, T.P., Salonen, V.-P., Francus, 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. DOI: 10.1899/12-178.1.

Vincent, W.F., Laurion, I., Pienitz, R., Walter Anthony, K.M., 2013. Climate Impacts on Arctic Lake Ecosystems. Pages 27-42 in Goldman, C.R., Kumagai, M., Robarts, R.D. (Editors). Climatic Change and Global Warming of Inland Waters: Impacts and Mitigation for Ecosystems and Societies. Wiley-Blackwell.

Black, J., 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. DOI: 10.1080/0269249X.2012.654825.

Brown, T., Reimer, K., Sheldon, T., Bell, T., Bentley, S., Pienitz, R., Gosselin, M., Blais, M., Carpenter, M., Estrada, E., Richerol, T., Kahlmeyer, E., Luque, S., Sjare, B., Fisk, A., Iverson, S., 2012. A first look at Nunatsiavut Kangidualuk ('fjord') ecosystems. Pages 271-301 in Allard, M., Lemay, M. (Editors). Nunavik and Nunatsiavut: From science to policy. An Integrated Regional Impact Study (IRIS) of climate change and modernization. ArcticNet Inc. Quebec, Canada.

Gantner, N., Michaud, W.K., Veillette, J., Bajno, R., Muir, D., Vincent, W.F., 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). Arctic, 65(2): 195-206.

Labrecque, V., Nürnberg, G., Tremblay, R., Pienitz, R., 2012. Caractérisation de la charge interne de phosphore du Lac Nairne, Charlevoix (Quebéc). Revue des Sciences de l’Eau / Journal of Water Science, 25(1): 77-93.

Pienitz, R., Lemay, M., Michaud, J., Blasco, K., Veillette, J. (Editors), 2012. Impacts of Environmental Change in the Canadian Coastal Arctic: A Compendium of Research Conducted during ArcticNet Phase I (2004-2008). Volume 2. ArcticNet Inc., 256 pages. Quebec, Canada.

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. DOI: 10.1016/j.marmicro.2012.03.002.

Vincent, W.F., Martin, D., Pienitz, R., Laurion, I., Muir, D., Young, K.L., Bégin, Y., 2012. Freshwater resources in a changing environment. Pages 137-155 in Allard, M., Lemay, M. (Editors). Nunavik and Nunatsiavut: From science to policy. An Integrated Regional Impact Study (IRIS) of climate change and modernization. ArcticNet Inc. Quebec, Canada.

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