Dr.  Jesse Machiel Kalwij

Dr. Jesse Machiel Kalwij

Biogeography, plant ecology, road verge ecology, spatial ecology


  • Spatial-temporal dynamics of exotic plant species
  • Island biogeography of the sub-Antarctic
  • Plant-animal interaction in savanna ecosystems
  • Application of unmanned aerial vehicles in vegetation ecology


Curriculum vitae

Since 2019 Research assistant (Postdoctoral fellow), Research Group Vegetation Science and Biogeography, Karlsruhe Institute of Technology (KIT)
Since 2018 Visiting research fellow, Kiel Pharmacognosy Group, Kiel University, Germany
Since 2013 Visiting research fellow, Centre for Ecological Genomics & Wildlife Conservation, University of Johannesburg, South Africa
2015-2018 Research assistant (Postdoctoral fellow), Institute of Ecosystem Research, Kiel University
2014-2015 Researcher, Institute of Botany, Brno, Czech Republic
2009-2013 Senior researcher, Institute of Ecology and Earth Sciences, University of Tartu, Estonia
2007-2009 Postdoctoral fellow, Department of Botany and Zoology, Stellenbosch University, South Africa
2005-2007 Postdoctoral fellow, Centre of Excellence for Invasion Biology, Stellenbosch University
2002-2005 PhD candidate, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf ZH, Switzerland
2001 Vegetation ecologist, Wageningen University, The Netherlands
2000-2001 Botanist, Tau Consultants (Pty) Ltd., Okavango Delta, Botswana
1994-2000 BSc and MSc degree in Biology, Wageningen University, The Netherlands


Other activities

  • Editorial boards: BioInvasion Records (2015 - 2019), Koedoe (2019 - present), Plant Ecology (2015 - present)
  • Memberships: International Association for Vegetation Science (IAVS), Nederlands-Vlaamse vereniging voor ecologie (NecoV)



  • Makroökologie (MSc Geoökologie, WiSe, LV-Nr. 6111205)
  • Vegetationskundliche Geländeübung (BSc Geoökologie, SoSe, LV-Nr. 6111056)
  • Verfahrenskurs GIS (BSc Geoökologie, WiSe & SoSe, LV-Nr. 6111087)
  • Forschungsprojekt Ökologie (MSc Geoökologie, SoSe, LV-Nr. 6111209)


Mairal, M.; Chown, S. L.; Shaw, J.; Chala, D.; Chau, J. H.; Hui, C.; Kalwij, J. M.; Münzbergová, Z.; Jansen van Vuuren, B.; Le Roux, J. J. (2021). Human activity strongly influences genetic dynamics of the most widespread invasive plant in the sub-Antarctic. Molecular Ecology. doi:10.1111/mec.16045
Kalwij, J. M.; Medan, D.; Kellermann, J.; Greve, M.; Chown, S. L. (2019). Vagrant birds as a dispersal vector in transoceanic range expansion of vascular plants. Scientific reports, 9 (1), Article no: 4655. doi:10.1038/s41598-019-41081-9Full textFull text of the publication as PDF document
Tay, J. Y. L.; Erfmeier, A.; Kalwij, J. M. (2018). Reaching new heights: can drones replace current methods to study plant population dynamics?. Plant ecology, 219, 1139–1150. doi:10.1007/s11258-018-0865-8
Kalwij, J. M.; Steyn, C.; Robertson, M. P.; Le Roux, P. C. (2017). Alien plant species that invade high elevations are generalists: support for the directional ecological filtering hypothesis. Journal of vegetation science, 28 (2), 337–346. doi:10.1111/jvs.12477
Haussmann, N. S.; Kalwij, J. M.; Bezuidenhout, S. (2016). Some ecological side-effects of chemical and physical bush clearing in a southern African rangeland ecosystem. South African journal of botany, 102, 234–239. doi:10.1016/j.sajb.2015.07.012
Kalwij, J. M.; Robertson, M. P.; Van Rensburg, B. J. (2015). Annual monitoring reveals rapid upward movement of exotic plants in a montane ecosystem. Biological invasions, 17 (12), 3517–3529. doi:10.1007/s10530-015-0975-3
Vild, O.; Kalwij, J. M.; Hédl, R. (2015). Effects of simulated historical tree litter raking on the understorey vegetation in a central European forest. Applied vegetation science, 18 (4), 569–578. doi:10.1111/avsc.12180
Barnaud, A.; Kalwij, J. M.; Berthouly-Salazar, C.; McGeoch, M. A.; Van Vuuren, B. J. (2013). Are road verges corridors for weed invasion? Insights from the fine-scale spatial genetic structure of Raphanus raphanistrum. Weed research, 53 (5), 362–369. doi:10.1111/wre.12033
Chown, S. L.; Le Roux, P. C.; Ramaswiela, T.; Kalwij, J. M.; Shaw, J. D.; McGeoch, M. A. (2013). Climate change and elevational diversity capacity : do weedy species take up the slack?. Biology letters, 9 (1), Article no: 20120806. doi:10.1098/rsbl.2012.0806
Haussmann, N. S.; Rudolph, E. M.; Kalwij, J. M.; McIntyre, T. (2013). Fur seal populations facilitate establishment of exotic vascular plants. Biological conservation, 162, 33–40. doi:10.1016/j.biocon.2013.03.024
Kalwij, J. M.; McGeoch, M. A.; Barnaud, A.; Van Vuuren, B. J. (2013). Patterns of weed invasion: evidence from the spatial genetic structure of Raphanus raphanistrum. Biological invasions, 15, 2455–2465. doi:10.1007/s10530-013-0465-4
Kalwij, J. M.; Smit, C. (2013). How authors can maximise the chance of manuscript acceptance and article visibility. Learned publishing, 26 (1), 28–31. doi:10.1087/20130106
Kalwij, J. M.; Zobel, M.; Öpik, M.; Cantero, J. J.; Davison, J.; Facelli, J. M.; Hiiesalu, I.; Jairus, T.; Koorem, K.; Leal, M. E.; Liira, J.; Metsis, M.; Neshataeva, V.; Paal, J.; Phosri, C.; Põlme, S.; Reier, Ü.; Saks, Ü.; Schimann, H.; Thiéry, O.; Vasar, M.; Moora, M. (2013). Global sampling of plant roots expands the described molecular diversity of arbuscular mycorrhizal fungi. Mycorrhiza, 23, 411–430. doi:10.1007/s00572-013-0482-2
Kasari, L.; Gazol, A.; Kalwij, J. M.; Helm, A. (2013). Low shrub cover in alvar grasslands increases small-scale diversity by promoting the occurrence of generalist species. Tuexenia, 33 (1), 293–308.
Le Roux, P. C.; Ramaswiela, T.; Kalwij, J. M.; Shaw, J. D.; Ryan, P. G.; Treasure, A. M.; McClelland, G. T. W.; McGeoch, M. A.; Chown, S. L. (2013). Human activities, propagule pressure and the alien plants in the sub-Antarctic : evidence in support of management. Biological conservation, 161, 18–27. doi:10.1016/j.biocon.2013.02.005
Kalwij, J. M. (2012). Review of ’The Plant List, a working list of all plant species’. Journal of vegetation science, 23 (5), 998–1002. doi:10.1111/j.1654-1103.2012.01407.x
Metsoja, J.-A.; Neuenkamp, L.; Pihu, S.; Vellak, K.; Kalwij, J. M.; Zobel, M. (2012). Restoration of flooded meadows in Estonia - vegetation changes and management indicators. Applied vegetation science, 15 (2), 231–244. doi:10.1111/j.1654-109X.2011.01171.x
Kalwij, J. M.; Boer, W. F. de; Mucina, L.; Prins, H. H. T.; Skarpe, C.; Winterbach, C. (2010). Tree cover and biomass increase in a southern African savanna despite growing elephant population. Ecological applications, 20 (1), 222–233. doi:10.1890/09-0541.1
Öpik, M.; Vanatoa, A.; Vanatoa, E.; Moora, M.; Davison, J.; Kalwij, J. M.; Reier, Ü.; Zobel, M. (2010). The online database MaarjAM reveals global and ecosystemic distribution patterns in arbuscular mycorrhizal fungi (Glomeromycota). The new phytologist, 188 (1), 223–241. doi:10.1111/j.1469-8137.2010.03334.x
Kalwij, J. M.; McGeoch, M. A.; Rhodes, J. I. (2009). A spatial assessment of Brassica napus gene flow potential to wild and weedy relatives in the Fynbos Biome. South African journal of science, 105 (3-4), 109–115.
Bolli, J. C.; Wagner, H. H.; Kalwij, J. M.; Werth, S.; Cherubini, P.; Scheidegger, C.; Rigling, A. (2008). Growth dynamics after historic disturbance in a montane forest and its implications for an endangered epiphytic lichen. Botanica Helvetica, 118, 111–127. doi:10.1007/s00035-008-0834-2
Kalwij, J. M.; Milton, S. J.; McGeoch, M. A. (2008). Road verges as invasion corridors? A spatial hierarchical test in an arid ecosystem. Landscape ecology, 23, 439–451. doi:10.1007/s10980-008-9201-3
Kalwij, J. M.; Robertson, M. P.; Rensburg, B. J. van. (2008). Human activity facilitates altitudinal expansion of exotic plants along a road in montane grassland, South Africa. Applied vegetation science, 11 (4), 491–498. doi:10.3170/2008-7-18555
McGeoch, M. A.; Chown, S. L.; Kalwij, J. M. (2006). A global indicator for biological invasion. Conservation biology, 20 (6), 1635–1646. doi:10.1111/j.1523-1739.2006.00579.x
Wagner, H. H.; Werth, S.; Kalwij, J. M.; Bolli, J. C.; Scheidegger, C. (2006). Modelling forest recolonization by an epiphytic lichen using a landscape genetic approach. Landscape ecology, 21, 849–865. doi:10.1007/s10980-005-5567-7
Werth, S.; Wagner, H. H.; Gugerli, F.; Holderegger, R.; Csencsics, D.; Kalwij, J. M.; Scheidegger, C. (2006). Quantifying dispersal and establishment limitation in a population of an epiphytic lichen. Ecology, 87 (8), 2037–2046. doi:10.1890/0012-9658(2006)87[2037:QDAELI]2.0.CO;2
Werth, S.; Wagner, H. H.; Holderegger, R.; Kalwij, J. M.; Scheidegger, C. (2006). Effect of disturbances on the genetic diversity of an old-forest associated lichen. Molecular ecology, 15, 911–921. doi:10.1111/j.1365-294X.2006.02838.x
Kalwij, J. M.; Wagner, H. H.; Scheidegger, C. (2005). Effects of stand-level disturbance events on the spatial distribution of a lichen indicator of forest conservation value. Ecological applications, 15 (6), 2015–2024. doi:10.1890/04-1912
Proches, S.; Wilson, J. R. U.; Veldtman, R.; Kalwij, J. M.; Richardson, D. M.; Chown, S. L.; Levey, D. J.; Bolker, B. M.; Tewksbury, J. J.; Sargent, S. (2005). Landscape corridors: Possible dangers?. Science, 310 (5749), 779–783. doi:10.1126/science.310.5749.779
Kalwij, J. M.; Sykora, K. V.; Keizer, P.-J. (2004). Een botanische evaluatie van 15 jaar rijkswegbermbeheer. De Levende natuur, 105 (3), 104–108.
Sykora, K. V.; Kalwij, J. M.; Keizer, P.-J. (2004). Phytosociological and floristic evaluation of a 15-year ecological management of roadside verges in the Netherlands. Preslia, 74 (4), 421–436.