All Stories

  1. Emerging Ornamental Plant Invaders in Urban Areas—Centranthus ruber in Cape Town, South Africa as a Case Study

    Article • Invasive Plant Science and Management, December 2017, Cambridge University Press

    Dr Sjirk Geerts

  2. Invasive alien trees reduce bird species richness and abundance of mutualistic frugivores and nectarivores; a bird’s eye view on a conflict of interest species in riparian habitats

    Article • Ecological Research, July 2017, Springer Science + Business Media

    Dr Sjirk Geerts

  3. Lack of human-assisted dispersal means Pueraria montana var. lobata (kudzu vine) could still be eradicated from South Africa

    Article • Biological Invasions, July 2016, Springer Science + Business Media

    Dr Sjirk Geerts

  4. Can short-billed nectar thieving sunbirds replace long-billed sunbird pollinators in transformed landscapes?

    Article • Plant Biology, June 2016, Wiley

    Dr Sjirk Geerts

  5. Site-specific conditions influence plant naturalization: The case of alien Proteaceae in South Africa

    Article • Acta Oecologica, August 2014, Elsevier

    Dr Sjirk Geerts

  6. Pink flower preference in sunbirds does not translate into plant fitness differences in a polymorphic Erica species

    Article • Evolutionary Ecology, February 2014, Springer Science + Business Media

    Dr Sjirk Geerts

  7. Different Traits Determine Introduction, Naturalization and Invasion Success In Woody Plants: Proteaceae as a Test Case

    Article • PLoS ONE, September 2013, PLOS

    Dr Sjirk Geerts

  8. Montpellier broom (Genista monspessulana) and Spanish broom (Spartium junceum) in South Africa: An assessment of invasiveness and options for management

    Article • South African Journal of Botany, July 2013, Elsevier

    Dr Sjirk Geerts

  9. Lag phase in plant invasions in Mediterranean systems can be explained by fire.

    Article • Austral Ecology, May 2013, Wiley

    Dr Sjirk Geerts

  10. Flower colour preference of sunbird pollinators

    Article • South African Journal of Botany, May 2013, Elsevier

    Dr Sjirk Geerts

  11. Reduced flower visitation by nectar-feeding birds in response to fire in Cape fynbos vegetation, South Africa

    Article • Journal of Ornithology, August 2011, Springer Science + Business Media

    Dr Sjirk Geerts

  12. Easy technique for assessing pollination rates in the genus Erica reveals road impact on bird pollination in the Cape fynbos, South Africa

    Article • Austral Ecology, October 2010, Wiley

    Dr Sjirk Geerts

  13. Farming with native bees (Apis mellifera subsp. capensis Esch.) has varied effects on nectar-feeding bird communities in South African fynbos vegetation

    Article • Population Ecology, September 2010, Springer Science + Business Media

    Dr Sjirk Geerts

  14. African sunbirds hover to pollinate an invasive hummingbird-pollinated plant

    Article • Oikos, April 2009, Wiley

    Dr Sjirk Geerts

  15. African sunbirds hover to pollinate an invasive hummingbird-pollinated plant

    Article • Oikos, April 2009, Wiley

    Dr Sjirk Geerts

  16. A malachite sunbird pollination guild in the Cape flora, with implications for the endangered Brunsvigia litoralis

    Article • South African Journal of Botany, April 2007, Elsevier

    Dr Sjirk Geerts