TY JOUR TI Trace element concentration in Antarctic krill reflecting their distribution in the Weddell Sea KW Antarctica KW krill Euphausia superba KW heavy metals KW trace elements KW bioaccumulation JO Russian Journal of Earth Sciences AU Solomatina, A.S. AU Demina, L.L. AU Spiridonov, V.A. PY 2021 IS 21 PB Geophysical Center of the Russian Academy of Sciences