@article{fdi:010064923,
  title = {{H}g stable isotope time trend in ringed seals registers decreasing sea ice cover in the {A}laskan arctic},
  author = {{M}asbou, {J}. and {P}oint, {D}avid and {S}onke, {J}. {E}. and {F}rappart, {F}. and {P}errot, {V}. and {A}mouroux, {D}. and {R}ichard, {P}. and {B}ecker, {P}. {R}.},
  editor = {},
  language = {{ENG}},
  abstract = {{D}ecadal time trends of mercury ({H}g) concentrations in {A}rctic biota suggest that anthropogenic {H}g is not the single dominant factor modulating {H}g exposure to {A}rctic wildlife. {H}ere, we present {H}g speciation (monomethyl-{H}g) and stable isotopic composition ({C}, {N}, {H}g) of 53 {A}laskan ringed seal liver samples covering a period of 14 years (1988-2002). {I}n vivo metabolic effects and foraging ecology explain most of the observed 1.6 parts per thousand variation in liver delta {H}g-202, but not {D}elta {H}g-199. {R}inged seal habitat use and migration were the most likely factors explaining {D}elta {H}g-199 variations. {A}verage {D}elta {H}g-199 in ringed seal liver samples from {B}arrow increased significantly from +0.38 +/- 0.08%0 (+/- {SE}, n = 5) in 1988 to +0.59 +/- 0.07 parts per thousand (+/- {SE}, n = 7) in 2002 (4.1 +/- 1.2% per year, p < 0.001). {D}elta {H}g-199 in marine biological tissues is thought to reflect marine {H}g photochemistry before biouptake and bioaccumulation. {A} spatiotemporal analysis of sea ice cover that accounts for the habitat of ringed seals suggests that the observed increase in {D}elta {H}g-199 may have been caused by the progressive summer sea ice disappearance between 1988 and 2002. {W}hile changes in seal liver {D}elta {H}g-199 values suggests a mild sea ice control on marine {MMH}g breakdown, the effect is not large enough to induce measurable {H}g{T} changes in biota. {T}his suggests that {H}g trends in biota in the context of a warming {A}rctic are likely controlled by other processes.},
  keywords = {{ETATS} {UNIS} ; {ALASKA} ; {ARCTIQUE}},
  booktitle = {},
  journal = {{E}nvironmental {S}cience and {T}echnology},
  volume = {49},
  numero = {15},
  pages = {8977--8985},
  ISSN = {0013-936{X}},
  year = {2015},
  DOI = {10.1021/es5048446},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064923},
}