tailieunhanh - Biodiversity and distribution patterns of free-living nematode communities in Ba Lai river, Ben Tre province

The results showed that the nematode communities have characterized by high density and biodiversity, providing useful information of nematode assemblages in freshwater habitas, in particular inland river. Also the results indicated that the distribution of nematode communities in Ba Lai river was strongly discriminated between in and outside of dam with two groups. | Vietnam Journal of Science and Technology 56 (2) (2018) 224-235 DOI: BIODIVERSITY AND DISTRIBUTION PATTERNS OF FREE-LIVING NEMATODE COMMUNITIES IN BA LAI RIVER, BEN TRE PROVINCE Tran Thanh Thai1, *, Nguyen Le Que Lam1, Nguyen Thi My Yen2, Ann Vanreusel2, Ngo Xuan Quang1 1 Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85 Tran Quoc Toan Street, District 3, Ho Chi Minh City, Viet Nam 2 Ghent University, Krijgslaan 281, S8, B-9000 Ghent, Belgium * Email: Received: 13 September 2017; Accepted for publication: 11 January 2018 Abstract. Nematode communities in Ba Lai river, Ben Tre province were investigated in September of 2015 (eight stations from estuary to upstream). The results showed that the nematode communities have characterized by high density and biodiversity, providing useful information of nematode assemblages in freshwater habitas, in particular inland river. Also the results indicated that the distribution of nematode communities in Ba Lai river was strongly discriminated between in and outside of dam with two groups. The Ba Lai dam may be reasons for cause the nematodes distribution discontinuity. Present study is a pioneering attempt to record the impact of the dam on benthic - invertebrate in Viet Nam. Keywords: Ba Lai dam, Ben Tre province, biodiversity, dam effect, distribution, nematode communities. Classification numbers: ; 1. INTRODUCTION Currently, Mekong river is internationally recognised as the second most biodiversity river in the world (after the Amazon river) [1, 2]. There are current estimated at least 1,200 species of fish, possibly reaching 1,700 and high diversity is also exhibited by other aquatic animal and plant communities [3]. While studies and reviews on fish species diversity in Mekong river are increasingly common, to date, accuracy of other aquatic animal and plant groups diversity in the Mekong river estimation have not yet .