Projects per year
Personal profile
Biography
I joined Macquarie University’s Department of Biological Sciences in July 2018. I am an evolutionary biologist and molecular ecologist. My background is in botany, microbiology, population genetics, and phylogeography. My research is focused under three broad themes: the population dynamics of invasive species, plant evolutionary biology and biogeography, and plant-microbial interactions. I am specifically interested in understanding aspects related to the phylogeography and population genetic structure and diversity of invasive plants, extreme long-distance dispersal in explaining historically disjunct distributions, the dynamics of plant-bacterial interaction networks, soil microbial community diversity and functional responses to plant community compositional changes, and plant evolutionary biology.
Education/Academic qualification
Botany, PhD, Phylogeography and population genetics of invasive plants in the Hawaiian Islands., University of Hawaii at Manoa
Award Date: 7 Dec 2007
Microbiology, MSc, Diversity of root-nodule symbionts of the genus Lotononis, University of Pretoria
Award Date: 5 Dec 2003
Microbiology, BSc(Hons), Root-nodule symbionts of soybean in South Africa, University of Pretoria
Award Date: 7 Dec 2001
Microbiology, BSc, University of Pretoria
Award Date: 3 Dec 1999
External positions
Extraordinary Associate Professor, Stellenbosch University
1 Jul 2018 → …
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Collaborations and top research areas from the last five years
Recent external collaboration on country/territory level. Dive into details by clicking on the dots or
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DP24: A network perspective for ecosystem responses to plant invasion
Le Roux, J., Richardson, D. M., Valverde, A. & Novoa, A.
15/05/24 → 14/05/28
Project: Research
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Mycorrhizal fungal diversity associated with small mammals in response to anthropogenic disturbance
Le Roux, J. (Primary Chief Investigator), Gil Fernández, M. (Student CI) & Carthey, A. (Partner Investigator)
14/06/23 → 31/12/23
Project: Research
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MQRAS 21 R2: Linking microbial with nutritional diversity in the invasive bumblebee (Bombus terrestris) across Tasmania
Dudaniec, R. (Primary Chief Investigator), Ponton, F. (Chief Investigator), Le Roux, J. (Chief Investigator) & Encinas-Viso, F. (Associate Investigator)
25/01/22 → 31/12/22
Project: Research
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Themeda triandra ploidy and provenance project
Hancock, N. (Other), Leishman, M. (Associate Investigator) & Le Roux, J. (Chief Investigator)
3/08/20 → 30/06/22
Project: Research
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Below- and above-ground mutualisms impact two alien brooms in South Africa differently
Geerts, S. & Le Roux, J. J., Apr 2025, In: Biological Invasions. 27, 4, p. 1-15 15 p., 109.Research output: Contribution to journal › Article › peer-review
Open AccessFile1 Citation (Scopus)19 Downloads (Pure) -
Fitness and morphology support genetic differentiation across different geographic scales in a native insect utilising native vs. invasive host plants
Le Roux, J. J., Brown, L., Carroll, S. P., O'Hare, J. A., Herbert, J. M., Delamotte, N. M., Bersee, N., Iredell, S., Clarke, R. M., Kosak, S., Dudaniec, R. Y. & Geraghty, D. M., May 2025, In: Ecology and Evolution. 15, 5, p. 1-12 12 p., e71373.Research output: Contribution to journal › Article › peer-review
Open AccessFile32 Downloads (Pure) -
Global patterns and drivers of soil extracellular enzyme activities in response to plant invasion: a meta-analysis
Chen, X., Chen, J., Le Roux, J. J., van Kleunen, M., van Groenigen, K. J., Fang, L., Hu, D., Fan, T., Liu, Y., Su, L., Luo, Y., Cao, J., Zhou, Y., Sinsabaugh, R. L. & Luo, M., Jul 2025, In: Global Ecology and Biogeography. 34, 7, p. 1-13 13 p., e70084.Research output: Contribution to journal › Review article › peer-review
Open Access -
iEcology reveals the importance of geography and genetic makeup in the flowering phenology of invasive Carpobrotus taxa
Canavan, S., Rodríguez, J., Gervazoni, P., Pipek, P., Le Roux, J. J., Castillo, M. L., Lieurance, D., Maříková-Moodley, D., Pyšek, P. & Novoa, A., Oct 2025, In: Ecological Solutions and Evidence. 6, 4, p. 1-13 13 p., e70122.Research output: Contribution to journal › Article › peer-review
Open AccessFile -
Legacy effects of an invasive legume more strongly impact bacterial than plant communities in a Mediterranean-type ecosystem
Yannelli, F. A., Keet, J. H., Kritzinger-Klopper, S. & Le Roux, J. J., Jan 2025, In: Journal of Environmental Management. 373, p. 1-11 11 p., 123802.Research output: Contribution to journal › Article › peer-review
Open AccessFile16 Downloads (Pure)
Datasets
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Genetic insights into the globally invasive and taxonomically problematic tree genus Prosopis
Le Roux, J. (Contributor), Macquarie University, 10 Jun 2022
Dataset
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Prosopis trait data for reciprocal transplant and glasshouse experiments
Le Roux, J. (Contributor), Macquarie University, 10 Jun 2022
Dataset
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Microsatellite matrix of Poa annua
Mairal, M. (Contributor), Le Roux, J. (Contributor), Chown, S. (Contributor), Shaw, J. (Contributor), Chala, D. (Contributor), Chau, J. (Contributor), van Vuuren, B. (Contributor), Hui, C. (Contributor) & Münzbergová, Z. (Contributor), Macquarie University, 10 Jun 2022
Dataset
Press/Media
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Plants are going extinct up to 350 times faster than the historical norm
23/08/19
1 Media contribution
Press/Media: Research