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Tran TT, Nguyen MY, Quang NX, Hoai PN, Veettil BK. Ecological impact assessment of irrigation dam in the Mekong Delta using intertidal nematode communities as bioindicators. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:90752-90767. [PMID: 35876992 DOI: 10.1007/s11356-022-22135-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 07/17/2022] [Indexed: 06/15/2023]
Abstract
The ecological response of nematode communities to dam construction has limited attention. In this study, the response of intertidal nematode communities in the Ba Lai River (Mekong Delta, Vietnam) to the construction of an irrigation dam was investigated. Nematode communities and environmental parameters were investigated during the rainy season of 2015. The obtained results showed that the Ba Lai dam had caused negative impacts on the local environment by disrupting longitudinal connectivity, the accumulation of nutrients (total organic carbon, total nitrogen, total phosphorus), and heavy metals (copper, iron, arsenic, lead) in the upstream and the lateral sides of the dam, consequently leading to changes in the nematode communities. The response of nematode communities to the dam's presence was clear based on their abundance, diversity, dominant genera, and community composition. Furthermore, changes in the abundance and diversity of nematodes in the Ba Lai River appeared to be controlled primarily by acidity (pH), total suspended solids (TSS), iron (Fe), clay, and salinity most responsible for changes to nematode communities. Because the nematode communities are well adapted to the physicochemical disturbances caused by dam construction, they are a potential tool for ecological monitoring and understanding the influence of dams on aquatic ecosystems.
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Affiliation(s)
- Thanh Thai Tran
- Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85 Tran Quoc Toan Str., Dist. 3, Ho Chi Minh City, Vietnam
| | - My Yen Nguyen
- Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85 Tran Quoc Toan Str., Dist. 3, Ho Chi Minh City, Vietnam
- Marine Biology Research Group, Biology Department, Ghent University, Krijgslaan 281, S8, B-9000, Ghent, Belgium
| | - Ngo Xuan Quang
- Institute of Tropical Biology, Vietnam Academy of Science and Technology, 85 Tran Quoc Toan Str., Dist. 3, Ho Chi Minh City, Vietnam.
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Str., Cau Giay Dist., Ha Noi, Vietnam.
| | - Pham Ngoc Hoai
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Str., Cau Giay Dist., Ha Noi, Vietnam
- Institute of Applied Technology, Thu Dau Mot University, 06 Tran Van On Str., Phu Hoa Ward, Thu Dau Mot City, Binh Duong Province, Vietnam
| | - Bijeesh Kozhikkodan Veettil
- Institute of Fundamental and Applied Sciences, Duy Tan University, 10C Tran Nhat Duat Str., Dist. 1, Ho Chi Minh City, Vietnam
- Faculty of Information Technology, Duy Tan University, 254 Nguyen Van Linh Str., Thanh Khe Dist, Da Nang, Vietnam
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Traunspurger W, Threis I, Majdi N. Vertical and temporal distribution of free-living nematodes dwelling in two sandy-bed streams fed by helocrene springs. NEMATOLOGY 2015. [DOI: 10.1163/15685411-00002914] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We monitored for 1 year the sediment nematofauna of two headwater streams located near water resurgence from typical helocrene springs. Nematode community composition, benthic organic matter (BOM) and chlorophylla(BChl a) were assessed in two sediment layers (0-5 and 5-10 cm depth), providing insights into nematode vertical distribution. Globally, the density, diversity and functional richness of nematodes were lower in the upper sediments, although important amounts of BChl awere available there. The assemblages differed markedly between springs, with only 41 shared species from a total of 120 species, suggesting stochastic horizontal distribution even at small geographical scales (<5 km). Bacterial-feeding nematodes dominated in the upper sediments, whereas omnivorous, fungal- and plant-feeding nematodes thrived in the deeper sediments. Reproduction by the dominant algal-feeding species,Prodesmodora arctica, was detected in August. The substantial presence of juveniles throughout the year highlighted the importance of parthenogenetic reproduction.
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Affiliation(s)
- Walter Traunspurger
- University of Bielefeld, Animal Ecology, Konsequenz 45, 33615 Bielefeld, Germany
| | - Ilka Threis
- University of Bielefeld, Animal Ecology, Konsequenz 45, 33615 Bielefeld, Germany
| | - Nabil Majdi
- University of Bielefeld, Animal Ecology, Konsequenz 45, 33615 Bielefeld, Germany
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