As in much of northern Australia, floodplain communities are
especially at risk from weeds. Large areas of wetlands exhibit
rapid species turnover and are thus readily colonised by invasive
species. As well as mimosa, the introduced pasture species para
grass (Brachiaria mutica) is present and has the potential
to degrade large areas of wetland.
The bauxite mine and associated township of Nhulunbuy are
perhaps responsible for most of the disturbed areas in the region.
The town area is infested with all major classes of weeds. The main
species targeted for control are coffee bush (Leucaena
leucocephala) and candle bush (Senna alata), with
control work also on African tulip tree (Spathodia
campanulata), Singapore daisy (Wedelia trilobata),
rubber bush (Calotropis procera) and bellyache bush
(Jatropha gossypifolia). In the town lagoon area there are
large and expanding populations of Ardisia hujilis, windmill
sedge (Cyperus involucratus) and blue pea (Clitorea
ternatea), as well as an infestation of salvinia (Salvinia
molesta ) in the lagoon itself.
15th Australian Weeds Conference
Weeds rampant: from hungry geese to scorching fires THE main reasons for the global weed explosion are global trade the atmospheric increase in CO 2 human interference in the nitrogen cycle and climate change—says US scientist… [read more...
Gamba grass management guide
The introduced pasture gamba grass ( Andropogon gayanus) is now the subject of a new management guide from the Northern Territory The NT Department of Natural Resources Environment and the Arts (NRETA) has developed the guide as… [read more...
Introduced grasses: poor master, but useful servant
Agricultural consultant Trevor Howard looks at some strategies the grazing industry and government are implementing to help contain exotics while reaping the benefits. Discusses the impact of exotic grasses on fire hazard. From Savanna Links, Issue 16, Oct - Dec 2000 [read more...
Introduced grasses: triumph or Trojan horse?
David Bowman of the Northern Territory University argues that one of the most profound threats to the tropical savannas is developing under our noses yet little research is being carried out on the issue Over the past… [read more...
Managing weeds for wildlife conservation - Gamba Grass Andropogon gayanus
Managing weeds for wildlife conservation Gamba Grass Introduction | Impact | Classification | Control | References Photo: Jeremy Garnett NT… [read more...
The Impact of fire on Gamba Grass
Outlines the potential impact of the spread of Gamba Grass in the Northern Territory, also contains links for further information about identification, control and management of the species. [read more...