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  • Article


  • Authors: Lê, Trần Chấn (2002)

  • Đa dạng sinh học có vai trò quan trọng trong việc duy trì các chu trình tự nhiên, giữ vững cân bằng sinh thái và cuộc sống loài người. Các kết quả điều tra cho thấy, nước ta có khoảng 12.000 loài thực vật bậc cao có mạch, hiện nay đã thống kê và mô tả được 10.500 loài, trong đó đã phân tích và xác định được 21,6% số loài là đặc hữu của Việt Nam. Về động vật, đã thống kê được 275 loài thú, 800 loài chim, 180 loài bò sát, 80 loài lưỡng cư, 5.500 loài côn trùng … đã xác định được hơn 100 loài và phân loài chim, 78 loài và phân loài thú là đặc hữu của Việt Nam.

  • Article


  • Authors: Trần, Hồng Thái; Hoàng, Anh Huy; Mai, Kim Liên (2009)

  • Climate change is a topical issue because of the large-scale global impact it is expected to have on economic life and human society. According to estimates of the Intergovernmental Committee on Climate Change (IPCC), by 2080 approximately 332 million people living in coastal and low-lying land will have lost homes due to flooding and sea level rise, including 32 million in Vietnam. Vietnam ranked five of the countries most heavily affected by climate change (Waibel, 2008). According to the Ministry of Natural Resources and Environment, over the last 50 years (1958-2007) in Vietnam, the average temperature has increased about 0.5-0.7oC and the sea level has risen about 20 cm (Bộ Tài nguyên và Môi trường, 2009). Recognizing the risks of climate change to the sustainable devel...

  • Article


  • Authors: Tùng, Nguyễn Xuân; Tấn, Đào Văn; Tuấn, Lê Xuân; Hùng, Vũ Mạnh (2009)

  • The mangroves in Hung Hoa commune, about 8 km from Vinh City to the east. The commune is in the suburb of Vinh City, Nghe An Province. The survey by our study group has help identify 145 plant species of 64 families. True mangroves include 12 species of 9 families. Angiospermae has 11 species belonging to 8 families; no species belongs to Monocotyledoneae class; only one representative species of Polypodiophyta is found. Despite the smallest number of the 3 main tree groups found here, the true mangrove group plays a vital role, accounting for a large area in the Lam river mouth. The most common species observed in the mangrove ecosytem here are Sonneratia caseolaris followed by Acanthus eberacteatis, A. Ilicifolius. A. Corniculatum growing dispersely mixed with the communi...

  • Article


  • Authors: Tuấn, Lê Xuân; Tùng, Nguyễn Xuân; Tuấn, Nguyễn Đức; Tuấn, Mai Sỹ; Tấn, Đào Văn (2009)

  • The biologically high-yielding mangrove ecosystem, which is characteristic in tropical and subtropical waters, not only brings economic benefits, but also plays a major role in regulating climate. It does this by saving and decomposing pollutants, thereby cleaning the marine environment, by acting as a bulwark against wind and storms, by limiting erosion and maintaining silt, thereby mitigating the effects of rising sea levels or even creating conditions for land encroachment into the sea. Like in many other coastal localities of Vietnam, mangrove vegetation in the area of Long Son commune, Vung Tau City, is strongly affected by the pressure of population, economic activities, industrial waste and, above all, the uncontrolled development of shrimp ponds. Lying in the region are m...

  • Article


  • Authors: Tuấn, Lê Xuân; Lam, Dương Minh; Tuấn, Nguyễn Đức; Liên, Nguyễn Thị Hồng; Tùng, Nguyễn Xuân; Tấn, Đào Văn; Hằng, Mai Thị; Hồng, Phan Nguyên; Tuấn, Nguyễn Hoàng (2009)

  • The mangrove ecosystem contains a rich and diversity source of genes. This gene source has created a biological system in which there are many species with special components of features and unique shapes to adapt to conditions of sea-flood and sea tide in coastal areas, to help carry on their ecological and economical functions. However, in the past decade, the biological genes in mangrove forest around the world and Vietnam are seriously threatened by excessive exploitation for immediate economic purposes such as agriculture, construction of infrastructure, migration, timber cutting, and, in particular, clearing mangrove forest for shrimp and crab ponds. These activities have reduced massive areas of mangrove forest, so it threats perishing many rare and precious species i...