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Auflistung nach Autor:in "Hoang, Thach Mai"

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  • Konferenzbeitrag
    Study on the distribution of Francois’s Langur (Trachypithecus francoisi) in Northern of Vietnam under climate change scenario
    (EnviroInfo Dessau 2012, Part 1: Core Application Areas, 2012) Manh, Vu Van; Hoang, Thach Mai; Mai, Le Thi Tuyet; Van, Pham Thanh
    Environmental niche modeling has been demonstrating to be a useful tool in conservation planning and be used widely in recent years. Therefore, many models have been developed for different purposes as well as different species so far. This paper presents an application of two of them (i.e. BIOCLIM and DOMAIN models) to study the distribution of Francoi’s langur in Northeastern Vietnam. Surface climate data and distribution data from the previous surveys were used as model input. The model results represented potential distribution areas of Trachypithecus francoisi in current climatic condition and predictive areas in some future climatic conditions according to IPCC climate change scenario. The results also pointed out that the distribution of Francoi’s langur might be moving to the North and the West under climate change influence. The authors also implemented a comparison whether BIOCLIM or DOMAIN model is more suitable for modeling the distribution of this specific species. This study is a continuing effort to apply environmental niche modeling for primate species. The results are meaningful in supporting scientists and managers to organize field study planning in order to conserve this species.
  • Konferenzbeitrag
    Using environmental niche model to study the distribution of Tonkin snub-nosed monkey (Rhinopithecus avunculus) in the Nordeastern Vietnam under some climate change scenarios
    (Integration of Environmental Information in Europe, 2010) Manh, Vu Van; Hoang, Thach Mai; Van, Pham Thanh
    Environmental niche modeling is a very effective tool for discovery species distribution with only limited observed data. It is used to generate a potential distribution of species in environmental space, which can helps the managers to define the distribution area, make decision for field study and conservation. In this paper, we made effort to apply environmental niche modeling for Tonkin snub-nosed monkey (Rhinopithecus avunculus) - an endemic primate animals of Vietnam. We used the BIOCLIM model which is embeded in DIVA-GIS. The research is implemented in the Northeastern Vietnam, which is considered habitat of Rhinopithecus avunculus. The result was displayed in potential distribution maps by DIVA-GIS. We have generated three distribution maps with two climate conditions (i.e. current climate and future climate with climate change scenario). According to the output of model, the potential distribution of Tonkin snub-nosed is mostly covered the Northeastern of Vietnam , classified into 6 levels. The suitable area is narrow (36,806 km2) and will smaller under the climate change scenario (decrease to about 29,000 km2). The model also shows that, the distribution area of Tonkin snub-nosed monkey is moving to the North in the future climate condition.