Impact of a dam construction on the intertidal environment and free-living nematodes in the Ba Lai, Mekong Estuaries, Vietnam.

Autor: Quang NX; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18, Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam. ngoxuanq@gmail.com.; Department of Environmental Management and Technology, Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85, Tran Quoc Toan, Dist.3, Ho Chi Minh city, Vietnam. ngoxuanq@gmail.com., Yen NTM; Department of Environmental Management and Technology, Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85, Tran Quoc Toan, Dist.3, Ho Chi Minh city, Vietnam., Thai TT; Department of Environmental Management and Technology, Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85, Tran Quoc Toan, Dist.3, Ho Chi Minh city, Vietnam., Yen NTH; Thai Nguyen University, University of Sciences, Thai Nguyen, Vietnam., Van Dong N; Faculty of Chemistry, Ho Chi Minh City University of Science, Vietnam National University, Nguyen Van Cu Str., Dist. 5, Ho Chi Minh City, Vietnam., Hoai PN; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18, Hoang Quoc Viet, Cau Giay, Ha Noi, Vietnam.; Thu Dau Mot University, Binh Duong, Vietnam., Lins L; Marine Biology Research Group, Biology Department, Ghent University, Krijgslaan 281, S8, B-9000, Ghent, Belgium., Vanreusel A; Marine Biology Research Group, Biology Department, Ghent University, Krijgslaan 281, S8, B-9000, Ghent, Belgium., Veettil BK; Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, 700000, Vietnam.; Faculty of Information Technology, Duy Tan University, Da Nang, 550000, Vietnam., Hiep ND; Environmental Quality, Atmospheric Science and Climate Change Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam., Bang HQ; Institute for Environment and Resources, National University, Ho Chi Minh City, Vietnam., Quan NH; Institute for Circular Economy Development, National University, Ho Chi Minh City, Vietnam., Prozorova L; Far Eastern Branch of Russian Academy of Sciences, Federal Scientific Center of the East Asia Terrestrial Biodiversity, Vladivostok, Russia.
Jazyk: angličtina
Zdroj: Environmental monitoring and assessment [Environ Monit Assess] 2022 Oct 18; Vol. 194 (Suppl 2), pp. 770. Date of Electronic Publication: 2022 Oct 18.
DOI: 10.1007/s10661-022-10187-5
Abstrakt: The impact of high siltation and accumulation of organic and waste material in the intertidal of the dammed Ba Lai River in Vietnam as part of the Mekong estuarine system was investigated by means of marine free-living nematodes. Nutrients content (nitrate, ammonium, total phosphorus, total nitrogen), total suspended solids, total organic carbon, coliform, bacteria E. coli, pH, dissolved oxygen, total dissolved solids, methane and hydrogen sulfide concentration, and the nematode communities were characterized in sediment at selected stations along the river above and below the dam. Our results found elevated methane concentrations at the upstream side of the dam while hydrogen sulfide concentrations found to be highest in the downstream side of the dam. Furthermore, methane and hydrogen sulfide concentrations were correlated to nematode community characteristics such as trophic composition densities and genera composition. There was a clear difference between the communities above and below the dam. The discontinuous nematode community distribution indicated that the Ba Lai River is impacted by dam construction. Potentially the high deposition and eutrophication could turn the area into a methane-rich area related to predicted impact on nematodes.
(© 2022. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
Databáze: MEDLINE
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