Impact of urban pollution from the Hanoi area on benthic diatom communities collected from the red, Nhue and Tolich rivers (Vietnam)

被引:59
作者
Duong, Thi Thuy
Coste, Michel [1 ]
Feurtet-Mazel, Agnes
Dang, Dinh Kim
Gold, Caroline
Park, Young Seuk
Boudou, Alain
机构
[1] Cemagref UR Qual Eaux F, F-33610 Cestas, France
[2] Vietnam Acad Sci & Technol, Inst Environm Technol, Hanoi, Vietnam
[3] Univ Bordeaux 1, LEESA, UMR CNRS EPOC 5805, F-33120 Arcachon, France
[4] Kyung Hee Univ, Dept Biol, Seoul 130701, South Korea
关键词
benthic diatoms; biological assessment; water pollution; Vietnam;
D O I
10.1007/s10750-005-0005-z
中图分类号
Q17 [水生生物学];
学科分类号
071004 ;
摘要
The effects of urban pollution from Hanoi city on the benthic diatom communities of the Nhue-Tolich river system were studied during the 2003 dry season. Benthic diatoms were allowed to grow on glass slides suspended in the water flow for 4 weeks. To reveal the relationship between water quality and diatom communities, Canonical correspondence analysis (CCA) was used on data concerning relative abundances of diatom species and environmental variables. Two diatom indices, IPS and DAIpo, were applied to evaluate water quality in the three rivers. A total of 291 diatom taxa were found in the Red, Nhue and Tolich Rivers. These were mainly cosmopolitan taxa, with some tropical, subtropical and endemic taxa. The most abundant taxa at the Red site were Aulacoseira granulata, Achnanthidium minutissimum, Encyonema minutum, Navicula recens and other halophilous taxa such as Nitzschia kurzii, Seminavis strigosa, Entomoneis paludosa, Bacillaria paradoxa. Diatom assemblages at the Tolich site consisted mainly of Nitzschia umbonata, Nitzschia palea and Eolimna minima. Diatom density ranged from 660 to 30,000 cells/cm(2). Environmental variables and diatom assemblage composition at all sites were significantly correlated. Two diatom indices gave similar results and indicate the Tolich River with the lowest values as a highly polluted site.
引用
收藏
页码:201 / 216
页数:16
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