PD Dr. Stef Weijers

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PD Dr. Stef Weijers

0.021, U.022 (143, 009)

Meckenheimer Allee 166

+49 228 73-2093

  • Privatdozent, Assistant Professor
  • Habilitation (Professorial Dissertation): Arctic and Alpine Ecosystems: Past, Present, and Future Response to Climate Change (University of Bonn)
  • PhD Dissertation: Climate Reconstruction in the High Arctic: Development and Validation of a New Tree-Ring-Like Climate Proxy (Free University of Amsterdam)
  • Dendrochronology, Dendroecology, Ecology, Paleoecology, Biogeography, Shrubs, Arctic and Alpine Ecosystems
    Spitsbergen, Scandinavia, Canada, Greenland, Mongolia, Russia, South Africa


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Articles in peer-reviewed journals


WEIJERS, S. (2022) Declining Temperature and Increasing Moisture Sensitivity of Shrub Growth in the Low-Arctic Erect Dwarf-Shrub Tundra of Western Greenland. Ecology and Evolution, 12:e9419. DOI: 10.1002/ece3.9419.


HEIN, N., MERKELBACH, J., ZECH, K. & WEIJERS, S. (2021) Drought Sensitivity of Empetrum nigrum Shrub Growth at the Species' Southern Lowland Distribution Range Margin. Plant Ecology, 222, 305–321. https://doi.org/10.1007/s11258-020-01107-z


WEIJERS, S. & LÖFFLER, J. (2020) Auswirkungen des Klimawandels auf das Wachstum von Zwergsträuchern in Hochgebirgen. In: LOZÁN J. L., S.-W. BRECKLE, H. ESCHER-VETTER, H. GRASSL, D. KASANG, F. PAUL & U. SCHICKHOFF (eds.) Warnsignal Klima—Hochgebirge im Wandel, 246–251.

SANDHAGE-HOFMANN, A., LÖFFLER, J., KOTZE, E., WEIJERS, S., WINGATE, V., WUNDRAM, D., WEIHERMÜLLER, L., PAPE, R., DU PREEZ, C. C. & AMELUNG, W. (2020) Woody Encroachment and Related Soil Properties in Different Tenure-Based Management Systems of Semiarid Rangelands. Geoderma, 372, 114399. https://doi.org/10.1016/j.geoderma.2020.114399


BUCHWAL, A., WEIJERS, S., BLOK, D. & ELBERLING, B. (2019) Temperature Sensitivity of Willow Dwarf Shrub Growth from Two Distinct High Arctic Sites. International Journal of Biometeorology, 63, 167–181. https://doi.org/10.1007/s00484-018-1648-6

OYUNMUNKH, B., WEIJERS, S., LÖFFLER, J., BYAMBAGEREL, S., SONINKHISHIG, N., BÜRKERT, A., GÖNSTER-JORDAN, S. & SIMMER, C. (2019) Climate Variations over the Southern Altai and Dzungarian Basin Region, Central Asia, since 1580 CE. International Journal of Climatology, 39. https://doi.org/10.1002/joc.6097


THOMAS, H. J. D., MYERS-SMITH, I. H., BJORKMAN, A. D., ELMENDORF, S. C., BLOK, D., CORNELISSEN, J. H. C., FORBES, B. C., HOLLISTER, R. D., NORMAND, S., PREVÉY, J. S., ..., WEIJERS, S. et al. (2018) Traditional Plant Functional Groups Explain Variation in Economic but not Size-Related Traits Across the Tundra Biome. Global Ecology and Biogeography. https://doi.org/10.1111/geb.12783

BJORKMAN, A. D., MYERS-SMITH, I. H., ELMENDORF, S. C., NORMAND, S., THOMAS, H. J. D., ALATALO, J. M., ALEXANDER, H., ANADON-ROSELL, A., ANGERS-BLONDIN, S., BAI, Y., ..., WEIJERS, S., ... et al. (2018) Tundra Trait Team: A Database of Plant Traits Spanning the Tundra Biome. Global Ecology and Biogeography, 27, 1402–1411. https://doi.org/10.1111/geb.12821

BJORKMAN, A. D., MYERS-SMITH, I. H., ELMENDORF, S. C., NORMAND, S., RÜGER, N., BECK, P. S. A., BLACH-OVERGAARD, A., BLOK, D., CORNELISSEN, J. H. C., FORBES, B. C., ..., WEIJERS, S., ... et al. (2018): Plant Functional Trait Change Across a Warming Tundra Biome. Nature. https://doi.org/10.1038/s41586-018-0563-7

WEIJERS, S., BECKERS, N. & LÖFFLER, J. (2018) Recent Spring Warming Limits Near-Treeline Deciduous and Evergreen Alpine Dwarf Shrub Growth. Ecosphere, 9 (6), e02328. https://doi.org/10.1002/ecs2.2328

WEIJERS, S., MYERS-SMITH, I. H. & LÖFFLER, J. (2018) A Warmer and Greener Cold World: Summer Warming Increases Shrub Growth in the Alpine and High Arctic Tundra. Erdkunde, 72, 63–85. https://doi.org/10.3112/erdkunde.2018.01.04

WEIJERS, S., PAPE, R., LÖFFLER, J. & MYERS-SMITH, I. H. (2018) Contrasting Shrub Species Respond to Early Summer Temperatures Leading to Correspondence of Shrub Growth Patterns. Environmental Research Letters, 13, 034005. https://doi.org/10.1088/1748-9326/aaa5b8


ZACHARIAS, M., WEIJERS, S. & LÖFFLER, J. (2017) Growth Rings in Bush Species of the South African Savanna. African Journal of Ecology, 56, 399–403. https://doi.org/10.1111/aje.12440

WEIJERS, S, BUCHWAL, A., BLOK, D., LÖFFLER, J. & ELBERLING, B. (2017) High Arctic Summer Warming Tracked by Increased Cassiope tetragona Growth in the World’s Northernmost Polar Desert. Global Change Biology, 23, 5006–5020. https://doi.org/10.1111/gcb.1374


MYERS-SMITH, I. H., ELMENDORF, S. C., BECK, P. S. A., WILMKING, M., HALLINGER, M., BLOK, D., TAPE, K. D., RAYBACK, S. A., MACIAS-FAURIA, M., FORBES, B. C., SPEED, J. D. M., BOULANGER-LAPOINTE, N., RIXEN, C., LÉVESQUE, E., SCHMIDT, N. M., BAITTINGER, C., TRANT, A. J., HERMANUTZ, L., COLLIER, L. S., DAWES, M. A., LANTZ, T., WEIJERS, S., JØRGENSEN, R. H., BUCHWAL, A., BURAS, A., NAITO, A. T., RAVOLAINEN, V., SCHAEPMAN-STRUB, G., WHEELER, J., WIPF, S., GUAY, K., HIK, D. S., & VELLEND, M. (2015) Climate Sensitivity of Shrub Growth Across the Tundra Biome. Nature Climate Change, 5, 887–891. https://doi.org/10.1038/nclimate2697

BLOK, D., WEIJERS, S., WELKER, J.M., COOPER, E.J., MICHELSEN, A., LÖFFLER, J. & ELBERLING, B. (2015) Deepened Winter Snow Increases Stem Growth and Alters Stem δ13C and δ15N in Evergreen Dwarf Shrub Cassiope tetragona in High-Arctic Svalbard Tundra. Environmental Research Letters, 10 (4), 044008. https://doi.org/10.1088/1748-9326/10/4/044008

MYERS-SMITH, I., HALLINGER, M., BLOK, D., SASS-KLAASSEN, U., RAYBACK, S.A., WEIJERS, S., TRANT, A., TAPE, K.D., NAITO, A.,WIPF, S., RIXEN, C., DAWES, M., WHEELER, J., BUCHWAL, A., BAITTINGER, C., MACIAS-FAURIA, M., FORBES, B.C., LÉVESQUE, E., BOULANGER-LAPOINTE, N., BEIL, I., RAVOLAINEN, V. & WILMKING, M. (2015) Methods for measuring arctic and alpine shrub growth: a review. Earth-Science Reviews, 140, 1–13.  https://doi.org/10.1016/j.earscirev.2014.10.004


WEIJERS, S., WAGNER-CREMER, F., SASS-KLAASSEN, U., BROEKMAN, R. & ROZEMA, J. (2013) Reconstructing high arctic growing season intensity from shoot length growth of a dwarf shrub. The Holocene, 23, 719–729. https://doi.org/10.1177/0959683612470178

WEIJERS, S., AULIAHERLIATY, L., VAN LOGTESTIJN, R. & ROZEMA, J. (2013) Effects of manipulated precipitation and shading on Cassiope tetragona growth and carbon isotope discrimination: a high arctic field study. Arctic, Antarctic, and Alpine Research, 45, 132–142. https://doi.org/01.1657/1938-4246-45.1.132


WEIJERS, S., GREVE ALSOS, I., BRONKEN EIDESEN, P., BROEKMAN, R., LOONEN, M.J.J.E. & ROZEMA, J. (2012) No divergence in Cassiope tetragona: persistence of growth response along a latitudinal temperature gradient and under multi-year experimental warming. Annals of Botany, 110, 653–665. https://doi.org/10.1093/aob/mcs123

BUIZER, B., WEIJERS, S., VAN BOGEDOM, P.M., GREVE ALSOS, I., BRONKEN EIDESEN, P., VAN RIJCKESVORSEL, J., VAN BREDA, J., DE KORTE, M. & ROZEMA, J. (2012) Range shifts and global warming: ecological responses of Empetrum nigrum L. to experimental warming at the northern (high arctic) and southern (atlantic) geographical range margin. Environmental Research Letters, 7, 025501. https://doi.org/10.1088/17489326/7/2/025501


MYERS-SMITH, I., FORBES, B.C., WILMKING, M., HALLINGER, M., LANTZ, T., BLOK, D., TAPE, K.D., MACIAS FAURIA, M., SASS-KLAASSEN, U., LÉVESQUE, E., BOUDREAU, S., ROPARS, P., HERMANUTZ, L., TRANT, A., SIEGWART COLLIER, L., WEIJERS, S., ROZEMA, J., RAYBACK, S.A., SCHMIDT, N.M., SCHAEPMAN-STRUB, G., WIPF, S., RIXEN, C., MÉNARD, C., VENN, S., GOETZ, S., ANDREU-HAYLES, L., ELMENDORF, S., EPSTEIN, H.E., WELKER, J., GROGAN, P. & HIK, D. (2011) Shrub expansion in tundra ecosystems: Dynamics, impacts and research priorities. Environmental Research Letters, 6, 045509. https://doi.org/10.1088/1748-9326/6/4/045509


WEIJERS, S., BROEKMAN, R. & ROZEMA, J. (2010) Dendrochronology in the High Arctic: July air temperatures reconstructed from annual shoot length growth of the circumarctic dwarf shrub Cassiope tetragona. Quarternary Science Reviews, 29, 3831–3842. https://doi.org/10.1016/j.quascirev.2010.09.003


ROZEMA, J., WEIJERS, S., BROEKMAN, R., BLOKKER, P., BUIZER, B., WERLEMAN, C., EL YAQINE, H., HOOGEDOORN, H., FUERTES, M.M. & COOPER, E. (2009) Annual growth of Cassiope tetragona as a proxy for Arctic climate: developing correlative and experimental transfer functions to reconstruct past summer temperature on a millennial time scale. Global Change Biology, 15, 1703–1715. https://doi.org/10.1111/j.1365-2486.2009.01858


Other publications


WEIJERS, S. (2015) Dendrology in the Arctic. Invited presentation at CENPERM - Center for Permafrost, University of Copenhagen, 29 October 2015.


WEIJERS, S. & LÖFFLER, J. (2014) Growth responses of one evergreen and one deciduous dwarf shrub to the alpine micro-climate in the Norwegian mountains. In Accepted Abstracts of the 9th International Conference on Dendrochronology, 13-17 January 2014, Melbourne, Australia. pp. 125-126.


WEIJERS, S. & ROZEMA, J. (2013) Dendroecology in the Arctic. In IASC workshop on Arctic data rescue, citizen-science and collaborative research; Icelandic Meteorological Office, Reykjavik, Iceland - 11 & 12 November 2013.

BECKERS, N., RHEINHEIMER, L.H., LÖFFLER, J. & WEIJERS, S. (2013) Growth response ofEmpetrum nigrum ssp. hermaphroditum to the alpine micro-climate in the Norwegian mountains. InHochgebirge in Globalen Wandel – 22. Jahrestagung des AK Hochgebirge - Tagungsband. p. 44.

WEIJERS, S. (2013) Dwarf shrubs: The trees of the arctic and alpine tundra biome. In Hochgebirge im Globalen Wandel - 22. Jahrestagung des AK Hochgebirge - Tagungsband. p. 9.

WILMKING, M, HALLINGER, M., MYERS-SMITH, I., BAITTINGER, C., BECK, P., BEIL, I., BLOK, D., BOULANGER-LAPOINTE, N., BUCHWAL, A., BURAS, A., DAWES, M., FORBES, B.C., HIK, D., DE JONG, R., JØRGENSEN, R.H., LANTZ, T., LÉVESQUE, E., MACIAS-FAURIA, M., NATIO, A.T., RAVOLAINEN, V., RAYBACK, S.A., RIXEN, C., SCHAEPMAN-STRUB, G., SCHMIDT, N.M., SPEED, J., TAPE, K.D., TRANT, A., VELLEND, M., WEIJERS, S., WHEELER, J., WIPF, S. & ZIMOWSKI, M. (2013) Shrubs - Expanding opportunities for dendrochronologists. In Second American Dendrochronology Conference - Book of abstracts. p. 22.

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