, Volume 14, Issue 1–2, pp 223–240 | Cite as

Mercury Concentrations in Bicknell’s Thrush and Other Insectivorous Passerines in Montane Forests of Northeastern North America

  • Christopher C. RimmerEmail author
  • Kent P. McFarland
  • David C. Evers
  • Eric K. Miller
  • Yves Aubry
  • Daniel Busby
  • Robert J. Taylor


Anthropogenic input of mercury (Hg) into the environment has elevated risk to fish and wildlife, particularly in northeastern North America. Investigations into the transfer and fate of Hg have focused on inhabitants of freshwater aquatic ecosystems, as these are the habitats at greatest risk for methylmercury (MeHg) biomagnification. Deviating from such an approach, we documented MeHg availability in a terrestrial montane ecosystem using a suite of insectivorous passerines. Intensive and extensive sampling of Bicknell’s thrush (Catharus bicknelli) indicated significant heterogeneity in MeHg availability across 21 mountaintops in northeastern North America. Southern parts of the breeding range tended to be at greater risk than northern parts. Mean blood Hg concentrations for Bicknell’s thrush at 21 distinct breeding sites ranged from 0.08 to 0.38 ug/g (ww) and at seven Greater Antillean wintering sites ranged from 0.03 to 0.42 ug/g (ww). Overall concentrations were significantly greater in wintering than in breeding areas. Mercury exposure profiles for four passerine species on Mt. Mansfield, Vermont indicated greatest MeHg uptake in Bicknell’s thrush and yellow-rumped warbler (Dendroica coronata) and lowest in blackpoll warbler (Dendroica striata) and white-throated sparrow (Zonotrichia albicollis). The MeHg and total Hg ratio in blood in these four species was nearly 1:1. There was no correlation between blood and feather Hg concentrations in breeding Bicknell’s thrush, in part because of apparent retention of winter Hg body burdens, within-season variation of MeHg availability, and confounding factors such as influences from age. Adult thrushes had significantly higher concentrations of feather Hg than did young-of-the-year. Although individual patterns of inter-year feather Hg concentrations were disordered, some individuals exhibited bioaccumulation of MeHg. Female blood Hg concentrations were significantly lower than males’, in part because females have additional depurating mechanisms through eggs. Older male Bicknell’s thrushes that breed in New England are therefore likely at greatest risk. Mechanisms for Hg methylation in montane areas without standing water are not yet fully understood. However, recent studies indicate that MeHg is present in forest tree leaves and leaf detritus; saturated soils and other moist microhabitats may also contribute to MeHg availability. Our finding of a correlation between regional litterfall Hg flux patterns and Bicknell’s thrush blood Hg concentrations demonstrates on-site availability of MeHg. Further investigations into MeHg availability in montane environments are recommended to assess risk to insectivorous passerines, particularly the Bicknell’s thrush.


Songbirds Catharus bicknelli Nearctic-neotropical migratory birds methylmercury 


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  1. Adair, B.M., Reynolds, K.D., McMurry, S.T., Cobb, G.P. 2003Mercury occurrence in prothonotary warblers (Protonotaria citrea) inhabiting a national priorities list site and reference areas in southern AlabamaArch. Environ. Contam. Toxicol.44265271Google Scholar
  2. Atwood, J.L., Rimmer, C.C., McFarland, K.P., Tsai, S.H., Nagy, L.R. 1996Distribution of Bicknell’s Thrush in New England and New YorkWilson Bull.108650661Google Scholar
  3. Bank, M.S., Loftin, C.S. and Jung, R.E. (2005). Mercury bioaccumulation in two-lined salamanders from streams in the northeastern United States. Ecotoxicology 14, 181–192Google Scholar
  4. Bishop, C.A., Koster, M.D., Chek, A.A., Hussell, D.J.T., Jock, K. 1995Chlorinated hydrocarbons and mercury in sediments, red-winged blackbirds (Agelaius phoeniceus) and tree swallows (Tachycineta bicolor) from wetlands in the Great Lakes-St. Lawrence River basinEnviron. Toxicol. Chem.14491501Google Scholar
  5. Bowerman, W.W., Roe, A.S., Gilbertson, M.J., Best, D.A., Sikarskie, J.G., Mitchell, R.S., Summer, C.L. 2002Using bald eagles to indicate the health of the Great Lakes’ environmentLakes Reserv. Res. Manage.7183187Google Scholar
  6. Burger, J. 1993Metals in avian feathers: bioindicators of environmental pollutionRev. Envrion. Toxicol.5203311Google Scholar
  7. Burger, J., Gochfeld, M. 1991Lead, mercury, and cadmium in feathers of tropical terns in Puerto Rico and AustraliaArch. Environ. Contam. Toxicol.21311315Google Scholar
  8. Burger, J., Cooper, K., Saliva, J., Gochfeld, D., Lipsky, D., Gochfeld, M. 1992Mercury bioaccumulation in organisms from three Puerto Rican estuariesEnviron. Monit. Assess.22181197Google Scholar
  9. Chen, C.Y., Stemberger, R.S., Kamman, N.C., Mayes, B. and Folt, C. (2005). Patterns of Hg bioaccumulation and transfer in aquatic food webs across multi-lake studies in the Northeast US. Ecotoxicology 14, 135–148Google Scholar
  10. Ericksen, J., Gustin, M.S., Schorran, D., Johnson, D., Lindberg, S., Coleman, J. 2003Accumulation of atmospheric mercury in forest foliageAtmos. Environ.3716131622Google Scholar
  11. Evers, D.C., Lane, O.P., Savoy, L. and Goodale, W. (2004). Assessing the impacts of methylmercury on piscivorous wildlife using a wildlife criterion value based on the Common Loon, 1998–2003. Report BRI-2004–2005 submitted to the Maine Department of Environmental Protection. Biodiversity Research Institute, Gorham, MEGoogle Scholar
  12. Evers, D.C., Taylor, K.M., Major, A., Taylor, R.J., Poppenga, R.H., Scheuhammer, A.M. 2003Common Loon eggs as indicators of methylmercury availability in North AmericaEcotoxicology126981Google Scholar
  13. Evers, D.C., Burgess, N.M., Champoux, L., Hoskins, B., Major, A., Goodale, W., Taylor, R.J., Poppenga, R. and Daigle, T. (2005). Patterns and interpretation of mercury exposure in freshwater avian communities in northeastern North America. Ecotoxicology 14, 193–222Google Scholar
  14. Evers, D.C., Kaplan, J.D., Meyer, M.W., Reaman, P.S., Brasleton, W.E., Major, A., Burgess, N., Schuehammer, A.M. 1998A geographic trend in mercury measured in common Lon feathers and bloodEnviron. Toxicol. Chem.17173183Google Scholar
  15. Falls, J.B., Kopachena, J.G. 1994White-throated Sparrow (Zonotrichia albicollis)Poole, A.Gill, F. eds. The Birds of North America, No. 128The Birds of North America, IncPhiladelphia, PAGoogle Scholar
  16. Fournier, F., Karasov, W.H., Kenow, K.P., Meyer, M.W., Hines, R.K. 2002The oral bioavailability and toxicokinetics of methylmercury in common loon (Gavia immer) chicksComp. Biochem. Physiol. Part A133 703–714Google Scholar
  17. Furness, R.W., Greenwood, J.J.D. 1993Birds as monitors of environmental changeChapman and HallNYGoogle Scholar
  18. Gerrard, P.M., St. Louis, V.L. 2001The effects of experimental reservoir creation on the bioaccumulation of methylmercury and reproductive success of tree swallows (Tachycineta biciolor)Environ. Sci. Technol.3513291338Google Scholar
  19. Grigal, D.F. 2002Inputs and outputs of mercury from terrestrial watersheds: a reviewEnviron. Rev.10139Google Scholar
  20. Hames, R.S., Rosenberg, K.V., Lowe, J.D., Barker, S.E., Dhondt, A.A. 2002Adverse effects of acid rain on the distribution of the wood thrush Hylocichla mustelina in North AmericaProc. Nat. Acad. Sci.991123511240Google Scholar
  21. Heinz, G.H., Hoffman, D.J. 2004Mercury accumulation and loss in mallard eggsEnviron. Toxicol. Chem.23222224Google Scholar
  22. Hunt, P.D., Eliason, B.C. 1999Blackpoll Warbler (Dendroica striata)Poole, A.Gill, F. eds. The Birds of North America, No. 431.The Birds of North America, IncPhiladelphia, PAGoogle Scholar
  23. Hunt, P.D., Flaspohler, D.J. 1998Yellow-rumped Warbler (Dendroica coronota)Poole, A.Gill, F. eds. The Birds of North America, No. 376.The Birds of North America, IncPhiladelphia, PAGoogle Scholar
  24. Kambamandi-Dimou, A., Kamarianos, A., Kilikidis, S. 1991Transfer of methylmercury to hens’ eggs after oral administrationBull. Environ. Contam. Toxicol.46128133Google Scholar
  25. Kamman, N.C., Burgess, N.M., Driscoll, C.T., Simonin, H.A., Linehan, J., Estabrook, R., Hutcheson, M., Major, A. and Scheuhammer, A.M. (2005). Mercury in freshwater fish of northeast North America – a geographic perspective based on fish tissue monitoring databases. Ecotoxicology 14, 163–180Google Scholar
  26. Lawson, S.T. 1999Cloud water chemistry and mercury deposition in a high elevation spruce-fir forestUniv. VermontBurlington, Vermont M.S. thesisGoogle Scholar
  27. Lee, Y.H., Bishop, K.H., Munthe, J. 2000Do concepts about catchment cycling of methylmercury and mercury in boreal catchments stand the test of time? Six years of atmospheric inputs and runoff export at Svartberget, northern SweedenSci. Total Environ.2601120Google Scholar
  28. Mason, R.P., Abbot, M., Bodaly, D., Bullock, O.R., Driscoll, C., Evers, D., Lindberg, S., Murray, M. and Swain, E. (2005). Monitoring the environmental response to changes in mercury contamination from the atmosphere: a multi-media challenge. Environ. Sci. Technol. 39, 15A–22AGoogle Scholar
  29. Miller, E.K., VanArsdale, A., Keeler, J.G., Chalmers, A., Poissant, L., Kamman, N. and Brulotte, R. (2005). Estimation and mapping of wet and dry mercury deposition across northeastern North America. Ecotoxicology 14, 53–70Google Scholar
  30. Monteiro, L.R., Furness, R.W. 2001Kinetics, dose-response, and excretion of methylmercury in free-living adult Cory’s shearwatersEnviron. Sci. Technol.35739746Google Scholar
  31. Ouellet, H. 1993Bicknell’s Thrush: taxonomic status and distributionWilson Bull.105545572Google Scholar
  32. Pashley, D.N., Beardmore, C.J., Fitzgerald, J.A., Ford, R.P., Hunter, W.C., Morrison, M.S., Rosenberg, K.V. 2000Partners in Flight: Conservation of the land birds of the United StatesAmerican Bird ConservancyThe Plains, VAGoogle Scholar
  33. Pennuto, C.M., Lane, O., Evers, D.C., Taylor, R.J. and Loukmas, J. (2005). Mercury in the northern crayfish, Orconectes virilis (Hagen), in New England. Ecotoxicology 14, 149–162Google Scholar
  34. Reynolds, K.D., Rainwater, T.R., Scollon, E.J., Sathe, S.S., Adair, B.M., Dixon, K.R.,  et al. 2001Accumulation of DDT and mercury in prothonotary warblers (Protonotaria citrea) foraging in a heterogeneously contaminated environmentEnviron. Toxicol. Chem.1229032909Google Scholar
  35. Rimmer, C.C., McFarland, K.P. 2000Migrant stopover and postfledging dispersal at a montane forest site in VermontWilson Bull.112124136Google Scholar
  36. Rimmer, C.C., McFarland, K.P., Ellison, W.G., Goetz, J.E. 2001Bicknell’s Thrush (Catharus bicknelli)Poole, A.Gill, F. eds. The Birds of North America, No. 592.The Birds of North America, IncPhiladelphia, PAGoogle Scholar
  37. Rosenberg, K.V. and Wells, J.V. (2000). Global perspectives on Neotropical migratory bird conservation in the Northeast: long-term responsibility versus immediate concern. In Bonney, R., Pashley, D.N., Cooper, R.J. and Niles, L. (eds), Strategies for Bird Conservation: the Partners in Flight Planning Process. pp. 32–43. Proceedings of the 3rd Partners in Flight Workshop; 1995 October 1–5; Cape May, NJ. Proceedings RMRS-P-16. Ogden, UT. US Department of Agriculture, Forest Service, Rocky Mountain Research StationGoogle Scholar
  38. Scheuhammer, A.M. 1991Effects of acidification on the availability of toxic metals and calcium to wild birds and mammalsEnviron. Pollut.71329375Google Scholar
  39. Schwesig, D., Matzner, E. 2000Pools and fluxes of mercury and methylmercury in two forested catchments in GermanySci. Total Environ.260213223Google Scholar
  40. Shriver, W.G., Evers, D.C. and Hodgman, T.P. (2002). Mercury exposure profile for Sharp-tailed Sparrows breeding in coastal Maine salt marshes. Report BRI 2002–2011 submitted to the Maine Department of Environmental Protection. Biodiversity Research Institute, Falmouth, MEGoogle Scholar
  41. St. Louis, V.L., Rudd, J.W.M., Kelly, C.A., Hall, B.D., Rolfus, K.R., Scott, K.J., Lindberg, S.E., Dong, W. 2001Importance of the forest canopy to fluxes of methyl mercury and total mercury to boreal ecosystemsEnviron. Sci. Technol.3530893098Google Scholar
  42. SYSTAT2002SYSTAT 10.2SYSTAT Software, IncRichmond, CAGoogle Scholar
  43. Thompson, D.R. 1996Mercury in birds and terrestrial mammalsBeyer, W.H.Heinz, G.H.Redmond-Norwood, A.W. eds. Environmental Contaminants in Wildlife: Interpreting Tissue ConcentrationsLewis PublishersBoca Raton, FL341356Google Scholar
  44. Tremblay, A., Lucotte, M. 1997Accumulation of total and methyl mercury in insect larvae of hydroelectric reservoirsCan. J. Fish. Aquat. Sci.54832841Google Scholar
  45. Tremblay, A., Lucotte, M., Rheault, I. 1996Methylmercury in benthic food web of two hydroelectric reservoirs and a natural lake of northern Quebec (Canada)Water Air Soil Pollut.91255269Google Scholar
  46. U. S. EPA. 1997. Mercury study report to Congress, Volume VII: Characterization of human health and wildlife risks from mercury exposure in the United States. U.S, Environ. Protection Agency, EPA-452/R-97-009Google Scholar
  47. VanArsdale, A., Weiss, J., Keeler, G., Miller, E., Boulet, G., Brulotte, R., Poissant, L. and Pucket, K. (2005). Patterns of mercury deposition and concentration in northeastern North America (1996–2002). Ecotoxicology 14, 37–52Google Scholar
  48. Welch, L. 1994Contaminant burdens and reproductive rates of bald eagles breeding in MaineUniv. MaineOrono, Maine M.S. thesisGoogle Scholar
  49. Wiener, J.G., Spry, D.J. 1996Toxicological significance of mercury in freshwater fishBeyer, W.N.Heinz, G.H.Redon, A.W. eds. Environmental contaminants in wildlife – interpreting tissue concentrationsLewis PublBoca Raton, Florida299343Google Scholar
  50. Wiener, J.G., Krabbenhoft, D.P., Heinz, G.H., Scheuhammer, A.M. 2003Ecotoxicology of mercuryHoffman, D.J.Rattner, B.A.Burton, G.A.,JrCairns, J.,Jr eds. Handbook of ecotoxicologyLewis PublBoca Raton, FL409463Google Scholar
  51. Wolfe, M., Norman, D. 1998Effects of waterborne mercury on terrestrial wildlife at Clear Lake: evaluation and testing of a predictive modelEnviron. Toxicol. Chem.17214227Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • Christopher C. Rimmer
    • 1
    Email author
  • Kent P. McFarland
    • 1
  • David C. Evers
    • 2
  • Eric K. Miller
    • 3
  • Yves Aubry
    • 4
  • Daniel Busby
    • 5
  • Robert J. Taylor
    • 6
  1. 1.Vermont Institute of Natural ScienceWoodstock
  2. 2.BioDiversity Research InstituteGorham
  3. 3.Ecosystems Research Group, Ltd.Norwich
  4. 4.Canadian Wildlife Service, Environment CanadaP.O. Box 10100Sainte-FoyCanada
  5. 5.Canadian Wildlife Service, Environment CanadaSackvilleCanada
  6. 6.Trace Element Research LaboratoryTexas A & M UniversityCollege Station

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