@article{fdi:010072831,
  title = {{F}low alterations by dams shaped fish assemblage dynamics in the complex {M}ekong-3{S} river system},
  author = {{N}gor, {P}. {B}. and {L}egendre, {P}. and {O}berdorff, {T}hierry and {L}ek, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {M}ekong, {S}ekong, {S}esan, and {S}repok ({M}ekong-3{S}) river system, a {R}amsar wetlands of international importance and critical fish migration routes, is altered by dams that distort the seasonal flow dynamics, structuring dispersal and reproduction success of fishes. {H}ere, we investigate the temporal responses of local fish beta diversity to hydrologic modification by the upstream functioning dams in five sites of the {M}ekong-3{S} system. {T}he sampling design adopted (two sites on the {M}ekong {R}iver displaying relatively undisturbed flow and three sites in the 3{S} displaying a gradient in flow perturbation) allows us to focus on the effect of flow alteration on local fish assemblage compositions. {B}y analysing 7-year daily fish monitoring data (06/2007-05/2014), we found that there have been overall declining trends in local species richness and abundance, with strong temporal variability in local beta diversity. {U}ndisturbed sites are characterized by seasonal assemblage variability, while disturbed sites are characterized by aseasonal assemblage changes. {T}emporal shifts in assemblage composition suggest that dams alter seasonal flow patterns and favour generalist species. {T}his study contributes to a better understanding of the temporal changes of tropical freshwater fish beta diversity in regulated and unregulated rivers. {I}t is thus relevant for fisheries planning and conservation.},
  keywords = {{D}am effects ; {F}ish abundance ; {F}ish richness ; {T}emporal beta diversity ; {E}nvironmental filtering ; {L}ower {M}ekong {B}asin ; {MEKONG} {BASSIN}},
  booktitle = {},
  journal = {{E}cological {I}ndicators},
  volume = {88},
  numero = {},
  pages = {103--114},
  ISSN = {1470-160{X}},
  year = {2018},
  DOI = {10.1016/j.ecolind.2018.01.023},
  URL = {https://www.documentation.ird.fr/hor/fdi:010072831},
}