Spatial patterns and temporal trends in mercury concentrations in common loons (Gavia immer) from 1998 to 2016 in New York’s Adirondack Park: has this top predator benefitted from mercury emission controls?
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Mercury (Hg), a neurotoxic pollutant, can be transported long distances through the atmosphere and deposited in remote areas, threatening aquatic wildlife through methylation and bioaccumulation. Over the last two decades, air quality management has resulted in decreases in Hg emissions from waste incinerators and coal-fired power plants across North America. The common loon (Gavia immer) is an apex predator of the aquatic food web. Long-term monitoring of Hg in loons can help track biological recovery in response to the declines in atmospheric Hg that have been documented in the northeastern USA. To assess spatial patterns and temporal trends in Hg exposure of the common loon in the Adirondack Park of New York State, we analyzed Hg concentrations in loon blood and egg samples from 116 lakes between 1998 and 2016. We found spatially variable Hg concentrations in adult loon blood and feathers across the Park. Loon Hg concentrations (converted to female loon units) increased 5.7% yr−1 from 1998 to 2010 (p = 0.04), and then stabilized at 1.70 mg kg−1 from 2010 to 2016 (p = 0.91), based on 760 observations. Concentrations of Hg in juvenile loons also increased in the early part of the record, stabilizing 2 years before Hg concentrations stabilized in adults. For 52 individual lakes with samples from at least 4 different years, loon Hg increased in 34 lakes and decreased in 18 lakes. Overall, we found a delayed recovery of Hg concentrations in loons, despite recent declines in atmospheric Hg.
KeywordsCommon loon Adirondack Park Spatial pattern Temporal trends Mercury New York
We greatly appreciate the many hours the Adirondack field staff have devoted each summer to capturing, color-banding, and sampling loons. The Adirondack Watershed Institute of Paul Smiths College and the Adirondack Ecological Center of SUNY ESF generously provided students annually to assist with monitoring loons on some of our study lakes. The New York State Department of Environmental Conservation, the Wildlife Conservation Society’s Zoological Health Program, and Calvin College have provided in-kind support, staff, and equipment for the loon capture and sampling fieldwork each year.
Financial support was provided by the New York State Energy Research and Development Authority, the Wildlife Conservation Society, The Wild Center, the Raquette River Advisory Council, and numerous private foundations and donors.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All applicable international, national, and institutional guidelines for the care and use of animals were followed. All procedures performed in studies involving animals were in accordance with the ethical standards of the institution or practice at which the studies were conducted.
- Barkay T, Gillman M, Turner RR (1997) Effects of dissolved organic carbon and salinity on bioavailability of mercury. Appl Environ Microbiol 63:4267–4271Google Scholar
- Branch UC (2008) The global atmospheric mercury assessment: sources, emissions and transport. UNEP-Chemicals, GenevaGoogle Scholar
- Desorbo CR, Burgess NM, Nye P, Loukmas JJ, Brant HA, Burton M, Persico CP, Evers DC (2019) Mercury exposure differences in nestling bald eagles in New York, USA. EcotoxicologyGoogle Scholar
- Driscoll CT, Driscoll KM, Fakhraei H, Civerolo K (2016) Long-term temporal trends and spatial patterns in the acid-base chemistry of lakes in the Adirondack region of New York in response to decreases in acidic deposition. Atmos Environ 146:5–14. https://doi.org/10.1016/j.atmosenv.2016.08.034 CrossRefGoogle Scholar
- Evers DC (2001) Common loon population studies: Continental mercury patterns and breeding territory philopatry. Ph.D. dissertation, University of Minnesota, St. Paul, MNGoogle Scholar
- Evers DC, Han YJ, Driscoll CT, Kamman NC, Goodale MW, Lambert KF, Holsen TM, Chen CY, Clair TA, Butler T (2007) Biological mercury hotspots in the northeastern United States and southeastern Canada. AIBS Bull 57:29–43Google Scholar
- Meyer MW, Evers DC, Daulton T, Braselton WE (1995) Common loons (Gavia immer) nesting on low pH lakes in northern Wisconsin have elevated blood mercury content. In: Mercury as a global pollutant. Springer, Netherlands. pp 871–880Google Scholar
- Millard GD, Driscoll CT, Montesdeoca M, Yang Y, Taylor MS, Boucher S, Shaw AL, Paul EA, Parker C, Yokota K (2019) Patterns and trends of fish mercury in New York State. EcotoxicologyGoogle Scholar
- Salmi T (2002) Detecting trends of annual values of atmospheric pollutants by the Mann–Kendall test and Sen’s slope estimates-the Excel template application MAKESENS. Publ. Air Qual., 31, Finn. Meteorol. Inst., HelsinkiGoogle Scholar
- SAS Institute Inc. (2013) SAS 9.4 guide to software. Updates. SAS Institute Inc, Raleigh, North CarolinaGoogle Scholar
- Schoch N, Glennon M, Evers D, Duron M, Jackson A, Driscoll C, Yu X, Simonin H (2011) Long-term monitoring and assessment of mercury based on integrated sampling efforts using the common loon, prey fish, water, and sediment. NYSERDA Report No. 12–06:116. https://www.nyserda.ny.gov/About/Publications/Research-and-Development-Technical-Reports/Environmental-Research-and-Development-Technical-Reports#eco. Accessed 25 Jan 2017
- Selin NE, Jacob DJ, Park RJ, Yantosca RM, Strode S, Jaeglé L, Jaffe D et al. (2007) Chemical cycling and deposition of atmospheric mercury: global constraints from observations. J Geophys Res Atmos 112(D2):1–14Google Scholar
- Steffan RJ, Korthals ET, Winfrey MR (1988) Effects of acidification on mercury methylation, demethylation, and volatilization in sediments from an acid-susceptible lake. Appl Environ Microbiol 54:2003–2009Google Scholar
- U.S. EPA (1994) Method 245.1: determination of mercury in water by cold vapor atomic absorption spectrometry. Revision 3.0. U.S. EPA, Cincinnati, OHGoogle Scholar
- U.S. EPA (2007) Mercury in solids and solutions by thermal decomposition, amalgamation, and atomic absorption spectrophotometry. EPA-7473. U.S. EPA. p 17Google Scholar
- U.S. EPA (2012) Mercury and air toxics standards for power plants. 40 CFR parts 60 and 63. U.S. EPA. https://www.gpo.gov/fdsys/pkg/FR-2012-02-16/pdf/2012-806.pdf
- USGCRP (2018) In: Reidmiller, DR, CW Avery, DR Easterling, KE Kunkel, KLM Lewis, TK Maycock, and BC Stewart (eds) Impacts, risks, and adaptation in the United States: Fourth National Climate Assessment, Volume II: Report-in-Brief. U.S. Global Change Research Program, Washington, DC, USA, p 186Google Scholar
- Wolfe MF, Atkeson T, Bowerman W, Burger J, Evers DC, Murray MW, Zillioux E (2007) Wildlife indicators. In: Harris R, Murray MW, Saltman T, Mason R, Krabbenhoft DP, Reash R (eds) Ecosystem responses to mercury contamination: indicators of change. CRC Press, New York, NY, pp 123–189CrossRefGoogle Scholar
- Yang Y, Yanai RD, Schoch N, Buxton VL, Gonzales KE, Evers DC, Lampman GG (2019) Determining optimum sampling strategies for monitoring mercury and reproductive success in common loons in the Adirondacks of New York. EcotoxicologyGoogle Scholar
- Zhou H, Zhou C, Lynam MM, Dvonch JT, Barres JA, Hopke PK, Cohen M, Holsen TM (2017) Atmospheric mercury temporal trends in the northeastern United States from 1992 to 2014: are measured concentrations responding to decreasing regional emissions? Environ Sci Technol Lett 4(3):91–97CrossRefGoogle Scholar