@article{fdi:010071349,
  title = {{M}ercury contamination level and speciation inventory in {L}akes {T}iticaca and {U}ru-{U}ru ({B}olivia) : current status and future trends},
  author = {{G}u{\'e}dron, {S}t{\'e}phane and {P}oint, {D}avid and {A}cha, {D}. and {B}ouchet, {S}. and {B}aya, {P}. {A}. and {T}essier, {E}. and {M}onperrus, {M}. and {M}olina, {C}. {I}. and {G}roleau, {A}. and {C}hauvaud, {L}. and {T}hebault, {J}. and {A}mice, {E}. and {A}lanoca, {L}. and {D}uwig, {C}{\'e}line and {U}zu, {G}a{\¨e}lle and {L}azarro, {X}. and {B}ertrand, {A}rnaud and {B}ertrand, {S}ophie and {B}arbraud, {C}. and {D}elord, {K}. and {G}ibon, {F}ran{\c{c}}ois-{M}arie and {I}banez, {C}. and {F}lores, {M}. and {S}aavedra, {P}. {F}. and {E}zpinoza, {M}. {E}. and {H}eredia, {C}. and {R}ocha, {F}. and {Z}epita, {C}. and {A}mouroux, {D}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}quatic ecosystems of the {B}olivian {A}ltiplano (similar to 3800 m a.s.l.) are characterized by extreme hydro-climatic constrains (e.g., high {UV}-radiations and low oxygen) and are under the pressure of increasing anthropogenic activities, unregulated mining, agricultural and urban development. {W}e report here a complete inventory of mercury ({H}g) levels and speciation in the water column, atmosphere, sediment and key sentinel organisms (i.e., plankton, fish and birds) of two endorheic {L}akes of the same watershed differing with respect to their size, eutrophication and contamination levels. {T}otal {H}g ({TH}g) and mono-methylmercury ({MMH}g) concentrations in filtered water and sediment of {L}ake {T}iticaca are in the lowest range of reported levels in other large lakes worldwide. {D}ownstream, {H}g levels are 3-10 times higher in the shallow eutrophic {L}ake {U}ru-{U}ru than in {L}ake {T}iticaca due to high {H}g inputs from the surrounding mining region. {H}igh percentages of {MMH}g were found in the filtered and unfiltered water rising up from <1 to similar to 50% {TH}g from the oligoihetero-trophic {L}ake {T}iticaca to the eutrophic {L}ake {U}ru-{U}ru. {S}uch high % {MMH}g is explained by a high in situ {MMH}g production in relation to the sulfate rich substrate, the low oxygen levels of the water column, and the stabilization of {MMH}g due to abundant ligands present in these alkaline waters. {D}ifferences in {MMH}g concentrations in water and sediments compartments between {L}ake {T}iticaca and {U}ru-{U}ru were found to mirror the offset in {MMH}g levels that also exist in their respective food webs. {T}his suggests that in situ {MMH}g baseline production is likely the main factor controlling {MMH}g levels in fish species consumed by the local population. {F}inally, the increase of anthropogenic pressure in {L}ake {T}iticaca may probably enhance eutrophication processes which favor {MMH}g production and thus accumulation in water and biota.},
  keywords = {{M}ercury ; {W}ater ; {S}ediment ; {B}iota ; {T}iticaca ; {BOLIVIE} ; {ANDES} ; {TITICACA} {LAC} ; {URU} {URU} {LAC} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{E}nvironmental {P}ollution},
  volume = {231},
  numero = {1},
  pages = {262--270},
  ISSN = {0269-7491},
  year = {2017},
  DOI = {10.1016/j.envpol.2017.08.009},
  URL = {https://www.documentation.ird.fr/hor/fdi:010071349},
}