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Nematode's morphometric shifts related to changing environmental conditions in the Mekong estuaries Ba Lai and Ham Luong, Vietnam

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Abstract
Damming has been reported to give many short-term benefits for local people but also to result in long-term negative impacts on the aquatic ecosystem. The ecological impact of the Ba Lai dam was studied by investigating environmental differences and the response of associated aquatic nematode communities (structure and morphometric characteristics) in both downstream and upstream sections of its estuary in comparison to an adjacent dam-free estuary Ham Luong, both belonging to the Mekong delta in Vietnam. Depleted dissolved oxygen, elevated methane and sulfide concentrations and increased accumulation of contaminants, including total suspended solid, heavy metals, and nutrients in the dammed estuary and its upstream section, indicated an impact of the dam on the environment. The dammed estuary showed differences in the nematode communities inhabiting the subtidal sediments from the reference estuary such as a higher nematode individual biomass with smaller length/width ratio as a consequence of the larger body width. The absence of long/thin nematodes in the dammed estuary, but high abundance of a slender nematode morphotype, a group with a higher efficiency of obtaining dissolved oxygen as a consequence of their comparatively large surface/volume ratio, might represent an adaptation of those communities to live in poor oxygen condition. In the dammed estuary, the small L/W ratio of nematode communities was potentially driven by the interaction effects of enrichment of both total suspended solid and ammonium linked to dissolved oxygen depletion. These findings support the potential use of nematode communities as bioindicators in ecological quality assessment although plausible; it is not possible to ascertain if only the dam causes the changes in the nematode communities.
Keywords
Biomass, Body size, Dam effect, Mekong, Morphotypes, Nematodes, TOTAL SUSPENDED-SOLIDS, BIOMASS, DIVERSITY, SIZE, COMMUNITIES, INDICATORS, ATTRIBUTES, MEIOFAUNA, SPECTRA, DELTA

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MLA
Nguyen, My Yen, et al. “Nematode’s Morphometric Shifts Related to Changing Environmental Conditions in the Mekong Estuaries Ba Lai and Ham Luong, Vietnam.” ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, vol. 30, no. 272, 2023, pp. 70974–84, doi:10.1007/s11356-023-27399-y.
APA
Nguyen, M. Y., Vanreusel, A., Lins Pereira, L., Tran Thanh, T., Campinas Bezerra, T., Hoang Nghia, S., & Ngo Xuan, Q. (2023). Nematode’s morphometric shifts related to changing environmental conditions in the Mekong estuaries Ba Lai and Ham Luong, Vietnam. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 30(272), 70974–70984. https://doi.org/10.1007/s11356-023-27399-y
Chicago author-date
Nguyen, My Yen, Ann Vanreusel, Lidia Lins Pereira, Thai Tran Thanh, Tânia Campinas Bezerra, Son Hoang Nghia, and Quang Ngo Xuan. 2023. “Nematode’s Morphometric Shifts Related to Changing Environmental Conditions in the Mekong Estuaries Ba Lai and Ham Luong, Vietnam.” ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 30 (272): 70974–84. https://doi.org/10.1007/s11356-023-27399-y.
Chicago author-date (all authors)
Nguyen, My Yen, Ann Vanreusel, Lidia Lins Pereira, Thai Tran Thanh, Tânia Campinas Bezerra, Son Hoang Nghia, and Quang Ngo Xuan. 2023. “Nematode’s Morphometric Shifts Related to Changing Environmental Conditions in the Mekong Estuaries Ba Lai and Ham Luong, Vietnam.” ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 30 (272): 70974–70984. doi:10.1007/s11356-023-27399-y.
Vancouver
1.
Nguyen MY, Vanreusel A, Lins Pereira L, Tran Thanh T, Campinas Bezerra T, Hoang Nghia S, et al. Nematode’s morphometric shifts related to changing environmental conditions in the Mekong estuaries Ba Lai and Ham Luong, Vietnam. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH. 2023;30(272):70974–84.
IEEE
[1]
M. Y. Nguyen et al., “Nematode’s morphometric shifts related to changing environmental conditions in the Mekong estuaries Ba Lai and Ham Luong, Vietnam,” ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, vol. 30, no. 272, pp. 70974–70984, 2023.
@article{01H20Y4X370TG4Y6K55QQ1RXDC,
  abstract     = {{Damming has been reported to give many short-term benefits for local people but also to result in long-term negative impacts on the aquatic ecosystem. The ecological impact of the Ba Lai dam was studied by investigating environmental differences and the response of associated aquatic nematode communities (structure and morphometric characteristics) in both downstream and upstream sections of its estuary in comparison to an adjacent dam-free estuary Ham Luong, both belonging to the Mekong delta in Vietnam. Depleted dissolved oxygen, elevated methane and sulfide concentrations and increased accumulation of contaminants, including total suspended solid, heavy metals, and nutrients in the dammed estuary and its upstream section, indicated an impact of the dam on the environment. The dammed estuary showed differences in the nematode communities inhabiting the subtidal sediments from the reference estuary such as a higher nematode individual biomass with smaller length/width ratio as a consequence of the larger body width. The absence of long/thin nematodes in the dammed estuary, but high abundance of a slender nematode morphotype, a group with a higher efficiency of obtaining dissolved oxygen as a consequence of their comparatively large surface/volume ratio, might represent an adaptation of those communities to live in poor oxygen condition. In the dammed estuary, the small L/W ratio of nematode communities was potentially driven by the interaction effects of enrichment of both total suspended solid and ammonium linked to dissolved oxygen depletion. These findings support the potential use of nematode communities as bioindicators in ecological quality assessment although plausible; it is not possible to ascertain if only the dam causes the changes in the nematode communities.}},
  author       = {{Nguyen, My Yen and Vanreusel, Ann and Lins Pereira, Lidia and Tran Thanh, Thai and Campinas Bezerra, Tânia and Hoang Nghia, Son and Ngo Xuan, Quang}},
  issn         = {{0944-1344}},
  journal      = {{ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH}},
  keywords     = {{Biomass,Body size,Dam effect,Mekong,Morphotypes,Nematodes,TOTAL SUSPENDED-SOLIDS,BIOMASS,DIVERSITY,SIZE,COMMUNITIES,INDICATORS,ATTRIBUTES,MEIOFAUNA,SPECTRA,DELTA}},
  language     = {{eng}},
  number       = {{272}},
  pages        = {{70974--70984}},
  title        = {{Nematode's morphometric shifts related to changing environmental conditions in the Mekong estuaries Ba Lai and Ham Luong, Vietnam}},
  url          = {{http://doi.org/10.1007/s11356-023-27399-y}},
  volume       = {{30}},
  year         = {{2023}},
}

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