Tropical Grasslands (1997) Volume 31, 337343
Tropical pasture plants as weeds
Chapel Hill, Brisbane, Queensland, Australia
Introduced pasture plants are a serious threat to Australia's ecosystems. Five of Australia's worst environmental weeds are tropical pasture grasses and 2 are shrubs introduced for shade and fodder. The paper documents cases where exotic tropical grasses and legumes introduced for sowing pastures have invaded national parks and natural ecosystems. The effects of vigorous exotic grasses in altering the fire regime, thus adversely affecting biodiversity, are discussed. Exotic grasses used in ponded pastures eliminate habitat for native fish. Woody legumes and twining legumes also pose a grave threat.