Prof. Tiffany Marie Knight




Biological invasions are considered one of the largest threats to biodiversity, and research on the causes of invasions has exploded in the past two decades.  Despite over 1,000 publications in the field of invasion biology, Ecologists have still not reached consensus on which mechanisms cause some non-native species to dominate and alter community structure and ecosystems functions, while other non-native species fail to do so.  At sDiv, I will examine how spatial scale, multivariate functional traits and phylogenetic relationships between non-native plants and resident communities influence invasiveness. To accomplish this, I will use databases containing spatially-explicit information on plant communities, phylogenies and functional traits.  Fortunately, databases of local plant communities are becoming widely available, functional trait databases such as the TRY initiative provide unprecedented availability of plant traits, and genomic data for developing community-level phylogenies are available in GenBank.



Bennett, J. M., Thompson, A., Goia, I., Feldmann, R., Ştefan, V., Bogdan, A., Rakosy, D., Beloiu, M., Biro, I.-B., Bluemel, S., Filip, M., Madaj, A.-M., Martin, A., Passonneau, S., Kalisch, D. P., Scherer, G., Knight, T. M.

A review of European studies on pollination networks and pollen limitation, and a case study designed to fill in a gap AoB PLANTS (in press),

Bernardo, H. L., Vitt, P., Goad, R., Masi, S., Knight, T. M.

Count population viability analysis finds that interacting local and regional threats affect the viability of a rare plant Ecological Indicators 93, 822-29

Chase, J. M., McGill, B. J., McGlinn, D. J., May, F., Blowes, S. A., Xiao, X., Knight, T. M., Purschke, O., Gotelli, N. J.

Embracing scale-dependence to achieve a deeper understanding of biodiversity and its change across communities Ecology Letters 21(11), 1737-51

Craven, D., Knight, T. M., Barton, K. E., Bialic-Murphy, L., Cordell, S., Giardina, C. P., Gillespie, T. W., Ostertag, R., Sack, L., Chase, J. M.

OpenNahele: the open Hawaiian forest plot database Biodiversity Data Journal 6(e28406),

Knight, T. M., Ashman, T.-L., Bennett, J. M., Burns, J. H., Passonneau, S., Steets, J. A.

Reflections on, and visions for, the changing field of pollination ecology Ecology Letters 21(8), 1282-95

McGlinn, D. J., Xiao, X., May, F., Gotelli, N. J., Blowes, S., Knight, T., Purschke, O., Chase, J., McGill, B.

MoB (Measurement of Biodiversity): a method to separate the scale-dependent effects of species abundance distribution, density, and aggregation on diversity change bioRxiv 244103,

Thompson, A. H., Knight, T. M.

Exotic plant species receive adequate pollinator service despite variable integration into plant–pollinator networks Oecologia 187(1), 135-42

Crawford, K. M., Knight, T. M.

Competition overwhelms the positive plant–soil feedback generated by an invasive plant Oecologia 183(1), 211-20

Pardini, E. A., Patten, M. V., Knight, T. M.

Effects of seed density and proximity to refuge habitat on seed predation rates for a rare and a common Lupinus species American Journal of Botany 104(3), 389-98

Schuler, M. S., Chase, J. M., Knight, T. M.

Habitat patch size alters the importance of dispersal for species diversity in an experimental freshwater community Ecology and Evolution 7(15), 5774-83

Schuler, M. S., Chase, J. M., Knight, T. M.

Habitat size modulates the influence of heterogeneity on species richness patterns in a model zooplankton community Ecology 98(6), 1651-59

Vitt, P., Knight, T. M., Schutzenhofer, M., Kleiman, W., Havens, K., Bittner, T.

Experimental Grazing and Grass-Specific Herbicide Application Benefit Rare Forb Recruitment Natural Areas Journal 37(2), 161-69

Bernardo, H. L., Albrecht, M. A., Knight, T. M.

Increased drought frequency alters the optimal management strategy of an endangered plant Biological Conservation 203, 243-51

Guthrie, S. G., Crandall, R. M., Knight, T. M.

Fire indirectly benefits fitness in two invasive species Biological Invasions 18(5), 1265-73

Crandall, R., Knight, T. M.

Positive frequency dependence undermines the success of restoration using historical disturbance regimes Ecology Letters 18(9), 883-91
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Deutscher Platz 5e
04103 Leipzig

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+49 341 9733158
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Alexander von Humboldt Professur

Martin-Luther Universität Halle-Wittenberg

Helmholtz-Zentrum für Umweltforschung – UFZ

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