Geerts S, Pauw A (2009) African sunbirds hover to pollinate an invasive hummingbird-pollinated
plant. Oikos 118:573–579. https://doi.org/10.1111/j.1600-0706.2008.17167.x
Geerts S, Botha PW, Visser V et al (2013) Montpellier broom (Genista monspessulana) and
Spanish broom (Spartium junceum) in South Africa: an assessment of invasiveness and options
for management. S Afr J Bot 87:134–145. https://doi.org/10.1016/j.sajb.2013.03.019
Geerts S, Mashele BV, Visser V et al (2016) Lack of human-assisted dispersal means Pueraria
montana var. lobata (kudzu vine) could still be eradicated from South Africa. Biol Invasions
18:3119–3126. https://doi.org/10.1007/s10530-016-1226-y
Geerts S, Rossenrode T, Irlich UM et al (2017) Emerging ornamental plant invaders in urban
areas—Centranthus ruber in Cape Town, South Africa as a case study. Invasive Plant Sci
Manag 10:322–331. https://doi.org/10.1017/inp.2017.35
Gibson MR, Richardson DM, Marchante E et al (2011) Reproductive biology of Australian acacias:
important mediator of invasiveness? Divers Distrib 17:911–933. https://doi.org/10.1111/j.14724642.2011.00808.x
Gibson MR, Pauw A, Richardson DM (2013) Decreased insect visitation to a native species caused
by an invasive tree in the Cape Floristic Region. Biol Conserv 157:196–203. https://doi.org/10.
1016/j.biocon.2012.07.011
Giliomee JH (2010) Recent establishment of many alien insects in South Africa – a cause for
concern. Afr Entomol 19:151–155. https://doi.org/10.4001/003.019.0105
Glen M, Alfenas AC, Zauza EAV et al (2007) Puccinia psidii: a threat to the Australian environment and economy – a review. Australas Plant Pathol 36(1):16. https://doi.org/10.1071/
AP06088
Glyphis PJ, Milton JS, Siegfried RW (1981) Dispersal of Acacia cyclops by birds. Oecologia
48:138–141. https://doi.org/10.1007/BF00347002
Gosper C, Vivian-Smith G (2010) Fruit traits of vertebrate-dispersed alien plants: smaller seeds and
more pulp sugar than indigenous species. Biol Invasions 12:2153–2163. https://doi.org/10.
1007/s10530-009-9617-y
Grant WS, Cherry MI (1985) Mytilus galloprovincialis Lmk. in southern Africa. J Exp Mar Bio
Ecol 90:179–191. https://doi.org/10.1016/0022-0981(85)90119-4
Greve M, Eric C, von der Meden O et al (2020) Biological invasions in South Africa’s offshore
sub-Antarctic territories. In: van Wilgen BW, Measey J, Richardson DM, Wilson JR, Zengeya
TA (eds) Biological invasions in South Africa. Springer, Berlin, pp 205–226. https://doi.org/10.
1007/978-3-030-32394-3_8
Griffiths CL, Hockey PAR, van Erkom Schurink C et al (1992) Marine invasive aliens on
South African shores: implications for community structure and tropillc functioning. Afr J
Mar Sci 12:713–722. https://doi.org/10.2989/02577619209504736
Haelewaters D, Minnaar I, Clusella-Trullas S (2016) First finding of the parasitic fungus
Hesperomyces virescens (Laboulbeniales) on native and invasive ladybirds (Coleoptera,
Coccinellidae) in South Africa. Parasite 23:5. https://doi.org/10.1051/parasite/2016005
Hansen S, Roets F, Seymour CL et al (2018) Alien plants have greater impact than habitat
fragmentation on native insect flower visitation networks. Divers Distrib 24:58–68. https://
doi.org/10.1111/ddi.12656
Hargrove J, Weyl OLF, Austin J (2017) Reconstructing the introduction history of an invasive fish
predator in South Africa. Biol Invasions 19:2261–2276. https://doi.org/10.1007/s10530-0171437-x
Harris JM, Branch GM, Elliot BL et al (1998) Spatial and temporal variability in recruitment of
intertidal mussels around the coast of southern Africa. Afr Zool 33:1–11. https://doi.org/10.
1080/02541858.1998.11448447
Heath RN, Gryzenhout M, Roux J et al (2006) Discovery of the canker pathogen Chrysoporthe
austroafricana on native Syzygium spp. in South Africa. Plant Dis 90:433–438. https://doi.org/
10.1094/PD-90-0433
Heleno RH, Olesen JM, Nogales M et al (2012) Seed dispersal networks in the Galápagos and the
consequences of alien plant invasions. Proc R Soc Lond B Biol 280:2012–2112. https://doi.org/
10.1098/rspb.2012.2112
14 Biotic Interactions as Mediators of Biological Invasions
419
plant. Oikos 118:573–579. https://doi.org/10.1111/j.1600-0706.2008.17167.x
Geerts S, Botha PW, Visser V et al (2013) Montpellier broom (Genista monspessulana) and
Spanish broom (Spartium junceum) in South Africa: an assessment of invasiveness and options
for management. S Afr J Bot 87:134–145. https://doi.org/10.1016/j.sajb.2013.03.019
Geerts S, Mashele BV, Visser V et al (2016) Lack of human-assisted dispersal means Pueraria
montana var. lobata (kudzu vine) could still be eradicated from South Africa. Biol Invasions
18:3119–3126. https://doi.org/10.1007/s10530-016-1226-y
Geerts S, Rossenrode T, Irlich UM et al (2017) Emerging ornamental plant invaders in urban
areas—Centranthus ruber in Cape Town, South Africa as a case study. Invasive Plant Sci
Manag 10:322–331. https://doi.org/10.1017/inp.2017.35
Gibson MR, Richardson DM, Marchante E et al (2011) Reproductive biology of Australian acacias:
important mediator of invasiveness? Divers Distrib 17:911–933. https://doi.org/10.1111/j.14724642.2011.00808.x
Gibson MR, Pauw A, Richardson DM (2013) Decreased insect visitation to a native species caused
by an invasive tree in the Cape Floristic Region. Biol Conserv 157:196–203. https://doi.org/10.
1016/j.biocon.2012.07.011
Giliomee JH (2010) Recent establishment of many alien insects in South Africa – a cause for
concern. Afr Entomol 19:151–155. https://doi.org/10.4001/003.019.0105
Glen M, Alfenas AC, Zauza EAV et al (2007) Puccinia psidii: a threat to the Australian environment and economy – a review. Australas Plant Pathol 36(1):16. https://doi.org/10.1071/
AP06088
Glyphis PJ, Milton JS, Siegfried RW (1981) Dispersal of Acacia cyclops by birds. Oecologia
48:138–141. https://doi.org/10.1007/BF00347002
Gosper C, Vivian-Smith G (2010) Fruit traits of vertebrate-dispersed alien plants: smaller seeds and
more pulp sugar than indigenous species. Biol Invasions 12:2153–2163. https://doi.org/10.
1007/s10530-009-9617-y
Grant WS, Cherry MI (1985) Mytilus galloprovincialis Lmk. in southern Africa. J Exp Mar Bio
Ecol 90:179–191. https://doi.org/10.1016/0022-0981(85)90119-4
Greve M, Eric C, von der Meden O et al (2020) Biological invasions in South Africa’s offshore
sub-Antarctic territories. In: van Wilgen BW, Measey J, Richardson DM, Wilson JR, Zengeya
TA (eds) Biological invasions in South Africa. Springer, Berlin, pp 205–226. https://doi.org/10.
1007/978-3-030-32394-3_8
Griffiths CL, Hockey PAR, van Erkom Schurink C et al (1992) Marine invasive aliens on
South African shores: implications for community structure and tropillc functioning. Afr J
Mar Sci 12:713–722. https://doi.org/10.2989/02577619209504736
Haelewaters D, Minnaar I, Clusella-Trullas S (2016) First finding of the parasitic fungus
Hesperomyces virescens (Laboulbeniales) on native and invasive ladybirds (Coleoptera,
Coccinellidae) in South Africa. Parasite 23:5. https://doi.org/10.1051/parasite/2016005
Hansen S, Roets F, Seymour CL et al (2018) Alien plants have greater impact than habitat
fragmentation on native insect flower visitation networks. Divers Distrib 24:58–68. https://
doi.org/10.1111/ddi.12656
Hargrove J, Weyl OLF, Austin J (2017) Reconstructing the introduction history of an invasive fish
predator in South Africa. Biol Invasions 19:2261–2276. https://doi.org/10.1007/s10530-0171437-x
Harris JM, Branch GM, Elliot BL et al (1998) Spatial and temporal variability in recruitment of
intertidal mussels around the coast of southern Africa. Afr Zool 33:1–11. https://doi.org/10.
1080/02541858.1998.11448447
Heath RN, Gryzenhout M, Roux J et al (2006) Discovery of the canker pathogen Chrysoporthe
austroafricana on native Syzygium spp. in South Africa. Plant Dis 90:433–438. https://doi.org/
10.1094/PD-90-0433
Heleno RH, Olesen JM, Nogales M et al (2012) Seed dispersal networks in the Galápagos and the
consequences of alien plant invasions. Proc R Soc Lond B Biol 280:2012–2112. https://doi.org/
10.1098/rspb.2012.2112
14 Biotic Interactions as Mediators of Biological Invasions
419