Food web controls on mercury fluxes and fate in the Colorado River, Grand Canyon.
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ABSTRACT:
SUBMITTER: Walters DM
PROVIDER: S-EPMC7228746 | biostudies-literature | 2020 May
REPOSITORIES: biostudies-literature
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Food web controls on mercury fluxes and fate in the Colorado River, Grand Canyon.
Walters D M DM Cross W F WF Kennedy T A TA Baxter C V CV Hall R O RO Rosi E J EJ
Science advances 20200515 20
Mercury (Hg) biomagnification in aquatic food webs is a global concern; yet, the ways species traits and interactions mediate these fluxes remain poorly understood. Few pathways dominated Hg flux in the Colorado River despite large spatial differences in food web complexity, and fluxes were mediated by one functional trait, predation resistance. New Zealand mudsnails are predator resistant and a trophic dead end for Hg in food webs we studied. Fishes preferred blackflies, which accounted for 56 ...[more]
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