{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,10]],"date-time":"2026-10-10T00:15:35Z","timestamp":1791591335211,"version":"4.3.4"},"reference-count":61,"publisher":"National Academy of Sciences","issue":"18","license":[{"start":{"date-parts":[[2007,10,24]],"date-time":"2007-10-24T00:00:00Z","timestamp":1193184000000},"content-version":"vor","delay-in-days":176,"URL":"http:\/\/www.pnas.org\/site\/misc\/userlicense.xhtml"}],"content-domain":{"domain":["www.pnas.org"],"crossmark-restriction":true},"short-container-title":["Proc. Natl. Acad. Sci. U.S.A."],"published-print":{"date-parts":[[2007,5]]},"abstract":"<jats:p>\n                    Rapid growth could significantly reduce methylmercury (MeHg) concentrations in aquatic organisms by causing a greater than proportional gain in biomass relative to MeHg (somatic growth dilution). We hypothesized that rapid growth from the consumption of high-quality algae, defined by algal nutrient stoichiometry, reduces MeHg concentrations in zooplankton, a major source of MeHg for lake fish. Using a MeHg radiotracer, we measured changes in MeHg concentrations, growth and ingestion rates in juvenile\n                    <jats:italic>Daphnia pulex<\/jats:italic>\n                    fed either high (C:P = 139) or low-quality (C:P = 1317) algae (\n                    <jats:italic>Ankistrodesmus falcatus<\/jats:italic>\n                    ) for 5 d. We estimated\n                    <jats:italic>Daphnia<\/jats:italic>\n                    steady-state MeHg concentrations, using a biokinetic model parameterized with experimental rates.\n                    <jats:italic>Daphnia<\/jats:italic>\n                    MeHg assimilation efficiencies (\u224895%) and release rates (0.04 d\n                    <jats:sup>\u22121<\/jats:sup>\n                    ) were unaffected by algal nutrient quality. However,\n                    <jats:italic>Daphnia<\/jats:italic>\n                    growth rate was 3.5 times greater when fed high-quality algae, resulting in pronounced somatic growth dilution. Steady-state MeHg concentrations in\n                    <jats:italic>Daphnia<\/jats:italic>\n                    that consumed high-quality algae were one-third those of\n                    <jats:italic>Daphnia<\/jats:italic>\n                    that consumed low-quality algae due to higher growth and slightly lower ingestion rates. Our findings show that rapid growth from high-quality food consumption can significantly reduce the accumulation and trophic transfer of MeHg in freshwater food webs.\n                  <\/jats:p>","DOI":"10.1073\/pnas.0611261104","type":"journal-article","created":{"date-parts":[[2007,4,24]],"date-time":"2007-04-24T22:19:26Z","timestamp":1177453166000},"page":"7477-7482","update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":214,"title":["Stoichiometric controls of mercury dilution by growth"],"prefix":"10.1073","volume":"104","author":[{"given":"Roxanne","family":"Karimi","sequence":"first","affiliation":[{"name":"*Department of Biological Sciences, Dartmouth College, Hanover, NH 03755; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Celia Y.","family":"Chen","sequence":"additional","affiliation":[{"name":"*Department of Biological Sciences, Dartmouth College, Hanover, NH 03755; 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