Present distribution
| This weed is not known to be naturalised in Victoria | ||||
Habitat: Native to South America. In it’s native range it has been stated to occur on rocky outcrops, reported as a pest of pastures in Hawaii, and in Brigalow and Belah woodland in Queensland. |
Map Overlays Used Land Use: Pasture dryland Broad vegetation types Coastal scrubs and grassland; coastal grassy woodland; heathy woodland; lowland forest; heath; box ironbark forest; inland slopes and plains; sedge rich woodland; grassland; plains grassy woodland; rainshadow woodland; mallee; boinka-raak; mallee woodland; Wimmera / mallee woodland In the non-coloured areas the plant is unlikely to establish as the climate, soil or landuse is not presently suitable. |
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QUESTION | COMMENTS | RATING | CONFIDENCE |
Social | |||
1. Restrict human access? | Has been recommended for use as a living hedge (Mishra, Dash & Sahu 2000). Once established in a thicket, the thorns, the height of the plant and its sheer bulk would require machinery for any large-scale movement. | mh | m |
2. Reduce tourism? | Not specified, may cause arid areas to appear more like their American counterparts. | ml | l |
3. Injurious to people? | Does have spines (Cullmann, Goetz & Groner 1987), fruit edible (Ninio etal 2003). | mh | mh |
4. Damage to cultural sites? | No structural damage reported, may be a negative for aesthetics | ml | l |
Abiotic | |||
5. Impact flow? | Terrestrial species | l | m |
6. Impact water quality? | Terrestrial species | l | m |
7. Increase soil erosion? | I has been reported a spiny cactus species can prevent up to 50% of the herbage cover immediately surrounding it being removed by grazing pressure (Mueller, Shoop & Laycock 1994), therefore limiting over grazing, therefore maintaining ground cover and reducing soil exposure. | l | m |
8. Reduce biomass? | A competitive species of up to 7m tall (Benson 1982), when invading a grassland, a significant increase in biomass, also may maintain a level of ground cover by preventing over grazing (Mueller, Shoop & Laycock 1994). | l | mh |
9. Change fire regime? | Due to high water content cacti species do not easily burn themselves, however if the presence of C.peruvianus does maintain a higher grass biomass by restricting grazing (Mueller, Shoop & Laycock 1994), this would increase the fuel load of the area. | m | ml |
Community Habitat | |||
10. Impact on composition (a) high value EVC | EVC= Riverine Chenopod Woodland (E); CMA= Mallee; Bioreg= Wimmera; VH CLIMATE potential. Creates and then dominates the shrub layer when invading grassland, may impact on the grass/herb layer by altering grazing and burning patterns. Major displacement of dominant sp. within a layer. | h | m |
(b) medium value EVC | EVC= Riverine Grassy Woodland (D); CMA= Mallee; Bioreg= Lowan Mallee; VH CLIMATE potential. Creates and then dominates the shrub layer when invading grassland, may impact on the grass/herb layer by altering grazing and burning patterns. Major displacement of dominant sp. within a layer. | h | m |
(c) low value EVC | EVC= Heathy Mallee (LC); CMA= Mallee; Bioreg= Lowan Mallee; VH CLIMATE potential. Creates and then dominates the shrub layer when invading grassland, may impact on the grass/herb layer by altering grazing and burning patterns. Major displacement of dominant sp. within a layer. | h | m |
11. Impact on structure? | Creates and then dominates the shrub layer when invading grassland, may impact on the grass/herb layer by altering grazing and burning patterns. | ml | m |
12. Effect on threatened flora? | No specific data. May protect species sensitive to grazing. | mh | l |
Fauna | |||
13. Effect on threatened fauna? | No specific data. | mh | l |
14. Effect on non-threatened fauna? | Does have spines (Cullmann, Goetz & Groner 1987). | ml | m |
15. Benefits fauna? | Fruits and flesh edible if spines can be avoided (Cullmann, Goetz & Groner 1987, Goldman etal 2005 and Ninio etal 2003), unsure of use by Australian species. | m | m |
16. Injurious to fauna? | Does have spines (Cullmann, Goetz & Groner 1987). | mh | m |
Pest Animal | |||
17. Food source to pests? | Fruit and flesh edible if spines can be avoided, no specific data on this species, deer and goats have been reported consuming other cacti species (Arnold & Drawe 1979 and Ramirez, Haenlein & Nunez-Gonzalez 2001). | ml | m |
18. Provides harbour? | A large arborecesent cacti could provide more structural complexity in a grassland habitat. | m | m |
Agriculture | |||
19. Impact yield? | Can invade pasture, and other cactus species have been noted for restricting grazing in their immediate vicinity (Mueller, Shoop & Laycock 1994). Produces a fruit crop itself (Goldman etal 2005). | ml | m |
20. Impact quality? | No specific data, other cactus species have been used, as an additional food source may be beneficial (Mueller, Shoop & Laycock 1994). | l | m |
21. Affect land value? | If control measures are viewed as necessary may have some negative influence. | m | l |
22. Change land use? | Cacti are most commonly present in rangeland situations, unless completely preventing grazing of an area would not significantly alter rangeland practise. | l | ml |
23. Increase harvest costs? | If restrict movement through an area may increase mustering time. | mh | m |
24. Disease host/vector? | No specific data | l | m |
QUESTION | COMMENTS | RATING | CONFIDENCE |
Establishment | |||
1. Germination requirements? | Seeds germinate well at 15-25 degrees, recorded from cultivation of the species optimum germination within temp variables and suitably irrigated (Zimmer 1996). Grows quickly from vegetative material (Cullmann, Goetz & Groner 1987). | mh | m |
2. Establishment requirements? | Recorded established in woodland (Forster & Schmeider 2000). | mh | mh |
3. How much disturbance is required? | Can establish in undisturbed woodland and pastures (Forster & Schmeider 2000). | mh | mh |
Growth/Competitive | |||
4. Life form? | Clumping cactus (other) | l | m |
5. Allelopathic properties? | None described, can however produce alkaloids (Rocha etal 2005). | l | m |
6. Tolerates herb pressure? | Can be a pest in pastures (Benson 1982) Can regrow vegetatively from broken segments (Cullmann, Goetz & Groner 1987), therefore light to medium grazing may help its spread. Does have thorns probably not preferred. | m | m |
7. Normal growth rate? | Biomass production similar to that of Opuntia ficus-indica and faster than a number of other cactus species (Mishra, Dash & Sahu 2000 and Nerd, Raveh & Mizahi 1993). | mh | mh |
8. Stress tolerance to frost, drought, w/logg, sal. etc? | Frost has been reported causing 50% necrosis of the plant but not fatal (Nerd, Raveh & Mizahi 1993). Stunted growth reported when exposed to saline water (Nerd, Raveh & Mizahi 1993). Cactus species tolerant of drought. | mh | mh |
Reproduction | |||
9. Reproductive system | Self-incompatible but can also reproduce vegetatively (Ninio etal 2003). | h | mh |
10. Number of propagules produced? | Able to produce a commercial quantity of fruit of which the pulp contains numerous fruit (Ninio etal 2003). | h | mh |
11. Propagule longevity? | Not reported. | m | l |
12. Reproductive period? | Not specifically stated however it has been grow under orchard conditions for 6 years and was still increasing fruit yields (Nerd, Raveh & Mizahi 1993). | mh | m |
13. Time to reproductive maturity? | Grows quicker when struck vegetatively than from seed (Nerd, Raveh & Mizahi 1993), could spread further vegetatively within one season. | h | m |
Dispersal | |||
14. Number of mechanisms? | Produces red fruits that are eaten by animals (Forster & Schmeider 2000 and Ninio etal 2003). | mh | mh |
15. How far do they disperse? | If eaten by a large animal seed may be transported 1km+ | h | m |