Broadway Arboretum

Species Information Page

Allocasuarina campestris Tamma

   

Male

Female

Location in Arboretum: Mallee Heath
No on Map: MH01

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  • Stark difference between male and female plants. See wind pollination for more information as to why they are different.
  • Rainfall utilization by vegetation is a complex function of the timing and magnitude of rain events, soil properties, evaporative demand and aboveground and belowground plant functioning. Understanding these interactions is highly relevant to a number of ecological problems, including salinization of cleared agricultural land in southern Australia. Revegetation efforts to fix problems such as salinization require information on plant water-use strategies. Sap-flow recordings were used to screen a range of species and identify four types of response to a large summer rainfall event: (a) no response, (b) delayed response, (c) small, rapid response and (d) large, rapid response. Proteaceous shrub species (e.g. Isopogon gardneri) rapidly increased transpiration up to five-fold. Shrubs such as Allocausarina campestris only increased transpiration two-fold due to partial summer dormancy. Deep-rooted Eucalyptus species (Myrtaceae, e.g. Wandoo E. wandoo) were sufficiently reliant on soil water that they did not respond to summer rainfall. One hemi-parasite species, the Christmass Tree Nuytsia floribunda required over 2 weeks to fully respond to rainfall (1).
  • The Western Australian termite, Drepanotermes tamminensis harvests various plant materials according to biomass availability. In shrubland dominated byAllocasuarina campestris, shoots of this species are taken. Harvesting mainly occurs during the autumn (April–May) and spring (September–October) seasons. (2)