Details of this species in Tram Chim National Park Status: Alien
Invasiveness: Invasive
Occurrence: Established and expanding
Source: Triet et al. Undated Arrival Date: 1984
Introduction: Species Notes for this Location:
In May 2000, the area of Tram Chim National Park infested with Mimosa pigra was 490 hectares. This in increased to 1846 hectares in May 2002. Between 2000 and 2002, mimosa doubled its area annually. Management Notes for this Location:
Despite warnings from weed experts, very little has been done in Tram Chim to control mimosa, and now the infestation has gone beyond easy management (Triet et al. 2001, Storrs et al. 2002, in Triet et al Undated). At the current rate of spread, and if there is no improvement in weed control effort, mimosa is expected to invade all grassland areas of Tram Chim in less than five years, seriously jeopardising the life of native plants and animals that depend on the native grassland habitat (Triet et al Undated). Recommended control methods include the cutting and removing of flowers/seed pods; the cutting and removing of stem material before flooding; the hand-removal of seedlings (eg: after draw-down or low level flooding); the application of herbicides (eg: foliar or basal bark application in association with above methods); and the establishment of competitive plant species after physical removal of mimosa (Walden et al. 1999). Location Notes:
Tram Chim National Park includes some of the last remnants of the Plain of Reeds wetland ecosystem, which previously covered 700,000 ha of the Mekong Delta in Vietnam. The vegetation of the site includes large areas of seasonally inundated grassland, regenerating Melaleuca cajuputi forest and open swampland, as well as permenant water holes and streams. Large populations of waterbirds are found at the site, particularly in the dry season, when thousands of waterfowl visit. This "protected" area faces a multitude of threats imposed by humans, including: the intensification of agriculture, the construction of dams, dredging and canalization, hunting, infrastructure development and the introduciton of exotic species (ie: M. pigra) (Tram Chim Undated). Last Modified: 31/05/2006 3:42:06 p.m.
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