Temporal and spatial trends of perfluoroalkyl substances in liver of roe deer (Capreolus capreolus)
Abstract
For more than 50 years perfluoroalkyl substances (PFASs) have found worldwide industrial and household uses. Some PFASs are presumed to be persistent and bioaccumulative. Roe deer (Capreolus capreolus) are thought to be a suitable bioindicator for the accumulation of organic xenobiotics. Due to the ubiquitous nature of PFASs in the environment a retrospective study on temporal trends was carried out. A total of 110 deer liver pools collected from 1989 to 2010 in Germany were analyzed for their levels of PFASs. The highest concentrations were measured for perfluorooctane sulfonate (PFOS) (median 6.3 μg/kg). Perfluorooctanoic acid (PFOA), perfluorononanoic acid (PFNA) and perfluorodecanoic acid (PFDA) were detected with median concentrations of 0.5 μg/kg, 1.2 μg/kg and 0.3 μg/kg, respectively, while concentrations of the other PFASs were below the limit of quantification. PFOS concentrations decreased significantly (r(s) = -0.741; p = <0.0001) from 9.2 μg/kg in 2000 to 1.8 μg/kg in 2010.
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As there were only three data sets with truly terrestrial organisms, it was not possible to make any comparisons of temporal trends for any PFASs between terrestrial and aquatic/marine species.
“As there were only three data sets with truly terrestrial organisms (roe deer [79], peregrine falcon [12], tawny owl [11]), it was not possible to make any comparisons of temporal trends for any PFASs between terrestrial and aquatic/marine species.”
Cites
Anastassiades, M., Lehotay, S. J., Štajnbaher, D., & Schenck, F. J. (2003) · Journal of AOAC INTERNATIONAL · doi:10.1093/jaoac/86.2.412 · Cited by 5,670 · see citing works
Biological Monitoring of Polyfluoroalkyl Substances: A Review
Houde, M., Martin, J. W., Letcher, R. J., Solomon, K. R., & Muir, D. C. G. (2006) · Environmental Science & Technology · doi:10.1021/es052580b · Cited by 1,259 · see citing works
A first global production, emission, and environmental inventory for perfluorooctane sulfonate
Paul, A. G., Jones, K. C., & Sweetman, A. J. (2009) · Environmental Science & Technology · doi:10.1021/es802216n · Cited by 1,096 · see citing works
Monitoring of Perfluorinated Compounds in Aquatic Biota: An Updated Review: PFCs in Aquatic Biota
Houde, M., De Silva, A. O., Muir, D. C. G., & Letcher, R. J. (2011) · Environmental Science & Technology · doi:10.1021/es104326w · Cited by 847 · see citing works
Clarke, B. O., & Smith, S. R. (2010) · Environment International · doi:10.1016/j.envint.2010.06.004 · Cited by 813 · see citing works
Perfluoroalkyl Contaminants in a Food Web from Lake Ontario
Martin, J. W., Whittle, D. M., Muir, D. C. G., & Mabury, S. A. (2004) · Environmental Science & Technology · doi:10.1021/es049331s · Cited by 514 · see citing works
Perfluorinated Surfactants in Surface and Drinking Waters (9 pp)
Exner, M., & Färber, H. (2006) · Environmental Science and Pollution Research - International · doi:10.1065/espr2006.07.326 · Cited by 507 · see citing works
Levels and trends of poly- and perfluorinated compounds in the arctic environment
Butt, C. M., Berger, U., Bossi, R., & Tomy, G. T. (2010) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2010.03.015 · Cited by 488 · see citing works
Toxicology of perfluorinated compounds
Stahl, T., Mattern, D., & Brunn, H. (2011) · Environmental Sciences Europe · doi:10.1186/2190-4715-23-38 · Cited by 432 · see citing works
Self-citationCui, L., Zhou, Q.-F., Liao, C.-Y., Fu, J.-J., & Jiang, G.-B. (2009) · Archives of Environmental Contamination and Toxicology · doi:10.1007/s00244-008-9194-6 · Cited by 368 · see citing works
Carryover of Perfluorooctanoic Acid (PFOA) and Perfluorooctane Sulfonate (PFOS) from Soil to Plants
Stahl, T., Heyn, J., Thiele, H.-U., Hüther, J., Failing, K., Georgii, S., & Brunn, H. E. (2008) · Archives of Environmental Contamination and Toxicology · doi:10.1007/s00244-008-9272-9 · Cited by 328 · see citing works
Self-citationPerfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in sewage treatment plants
Yu, J., Hu, J., Tanaka, S., & Fujii, S. (2009) · Water Research · doi:10.1016/j.watres.2009.03.009 · Cited by 317 · see citing works
Olsen, G., Butenhoff, J., & Zobel, L. R. (2009) · Reproductive Toxicology · doi:10.1016/j.reprotox.2009.02.001 · Cited by 296 · see citing works
Suja, F. B., Pramanik, B. K., & Zain, S. M. (2009) · Water Science & Technology · doi:10.2166/wst.2009.504 · Cited by 264 · see citing works
Naile, J. E., Khim, J. S., Wang, T., Chen, C., Luo, W., Kwon, B.-O., Park, J., Koh, C., Jones, P. D., Lü, Y., et al. (2010) · Environmental Pollution · doi:10.1016/j.envpol.2010.01.023 · Cited by 260 · see citing works
Levels in food and beverages and daily intake of perfluorinated compounds in Norway
Haug, L. S., Salihović, S., Jogsten, I. E., Thomsen, C., van Bavel, B., Lindström, G., & Becher, G. (2010) · Chemosphere · doi:10.1016/j.chemosphere.2010.06.023 · Cited by 209 · see citing works
Temporal Trends of PFOS and PFOA in Guillemot Eggs from the Baltic Sea, 1968−2003
Holmström, K. E., Järnberg, U., & Bignert, A. (2004) · Environmental Science & Technology · doi:10.1021/es049257d · Cited by 191 · see citing works
Smithwick, M., Norstrom, R. J., Mabury, S. A., Solomon, K. R., Evans, T. J., Stirling, I., Taylor, M. K., & Muir, D. C. G. (2006) · Environmental Science & Technology · doi:10.1021/es051750h · Cited by 150 · see citing works
Fair, P. A., Adams, J., Mitchum, G., Hulsey, T. C., Reif, J. S., Houde, M., Muir, D. C. G., Wirth, E., Wetzel, D. L., Zolman, E. S., et al. (2010) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2009.12.021 · Cited by 146 · see citing works
Bossi, R., Rigét, F. F., & Dietz, R. (2005) · Environmental Science & Technology · doi:10.1021/es0508469 · Cited by 139 · see citing works
Halogenated Contaminants in Farmed Salmon, Trout, Tilapia, Pangasius, and Shrimp
van Leeuwen, S. P. J., van Velzen, M. J. M., Swart, C., van der Veen, I., Traag, W. A., & de Boer, J. (2009) · Environmental Science & Technology · doi:10.1021/es803558r · Cited by 129 · see citing works
Verreault, J., Berger, U., & Gabrielsen, G. W. (2007) · Environmental Science & Technology · doi:10.1021/es070723j · Cited by 120 · see citing works
Herzke, D., Nygård, T., Berger, U., Huber, S., & Røv, N. (2009) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2009.08.048 · Cited by 101 · see citing works
Occurrence and assessment of perfluorinated chemicals in wild fish from Northern Germany
Schuetze, A., Heberer, T., Effkemann, S., & Juergensen, S. (2009) · Chemosphere · doi:10.1016/j.chemosphere.2009.12.015 · Cited by 98 · see citing works
Yeung, L. W. Y., Miyake, Y., Wang, Y., Taniyasu, S., Yamashita, N., & Lam, P. K. S. (2008) · Environmental Pollution · doi:10.1016/j.envpol.2008.08.005 · Cited by 96 · see citing works
Holmström, K. E., Johansson, A.-K., Bignert, A., Lindberg, P., & Berger, U. (2010) · Environmental Science & Technology · doi:10.1021/es100028f · Cited by 89 · see citing works
Perfluorinated Compounds in Infiltrated River Rhine Water and Infiltrated Rainwater in Coastal Dunes
Eschauzier, C., Haftka, J. J. H., Stuyfzand, P. J., & de Voogt, P. (2010) · Environmental Science & Technology · doi:10.1021/es100471z · Cited by 89 · see citing works
Long-chain perfluorinated chemicals in digested sewage sludges in Switzerland
Sun, H., Gerecke, A. C., Giger, W., & Alder, A. C. (2010) · Environmental Pollution · doi:10.1016/j.envpol.2010.09.020 · Cited by 88 · see citing works
Meyer, J., Jaspers, V. L. B., Eens, M., & Coen, W. D. (2009) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2009.07.032 · Cited by 80 · see citing works
Hart, K., Gill, V. A., & Kannan, K. (2008) · Archives of Environmental Contamination and Toxicology · doi:10.1007/s00244-008-9242-2 · Cited by 76 · see citing works
Geographical Distribution of Perfluorinated Compounds in Fish from Minnesota Lakes and Rivers
Delinsky, A. D., Strynar, M. J., McCann, P. J., Varns, J. L., McMillan, L., Nakayama, S. F., & Lindstrom, A. B. (2010) · Environmental Science & Technology · doi:10.1021/es903777s · Cited by 75 · see citing works
Rüdel, H., Müller, J., Jürling, H., Bartel-Steinbach, M., & Koschorreck, J. (2011) · Environmental Science and Pollution Research · doi:10.1007/s11356-011-0501-9 · Cited by 62 · see citing works
O’Connell, S. G., Arendt, M. D., Segars, A. L., Kimmel, T., Braun‐McNeill, J., Avens, L., Schroeder, B. A., Ngai, L., Kucklick, J. R., & Keller, J. M. (2010) · Environmental Science & Technology · doi:10.1021/es9036447 · Cited by 55 · see citing works
Fliedner, A., Rüdel, H., Jürling, H., Müller, J., Neugebauer, F., & Schröter‐Kermani, C. (2012) · Environmental Sciences Europe · doi:10.1186/2190-4715-24-7 · Cited by 50 · see citing works
Self-citationStahl, T., Falk, S. R. N., Failing, K., Berger, J., Georgii, S., & Brunn, H. E. (2011) · Archives of Environmental Contamination and Toxicology · doi:10.1007/s00244-011-9726-3 · Cited by 46 · see citing works
Self-citationWatanabe, M. X., Kunisue, T., Tao, L., Kannan, K., Subramanian, A., Tanabe, S., & Iwata, H. (2010) · Environmental Toxicology and Chemistry · doi:10.1002/etc.189 · Cited by 33 · see citing works
Flagged first, then by citations
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Sorted by citations
Per- and polyfluoroalkyl substances (PFAS) in livestock and game species: A review
Death, C. E., Bell, C., Champness, D., Milne, C. M., Reichman, S. M., & Hagen, T. G. (2021) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2020.144795 · Cited by 244 · see citing works
Land, M., de Wit, C. A., Bignert, A., Cousins, I. T., Herzke, D., Johansson, J. H., & Martin, J. W. (2018) · Environmental Evidence · doi:10.1186/s13750-017-0114-y · Cited by 219 · see citing works
“Within the group of 13 studies exhibiting change points, seven studies showed decreasing concentrations after the change point (roe deer [79], polar bear liver [134], herring gull eggs (Trischen) [80], northern sea otter [42], beluga whale [123], eelpout [128], and herring [139]).”
InfluentialLand, M., de Wit, C. A., Cousins, I. T., Herzke, D., Johansson, J. H., & Martin, J. W. (2015) · Environmental Evidence · doi:10.1186/2047-2382-4-3 · Cited by 105 · see citing works
Barrett, H., Du, X., Houde, M., Lair, S., Verreault, J., & Peng, H. (2021) · Environmental Science & Technology · doi:10.1021/acs.est.0c05957 · Cited by 96 · see citing works
Falk, S. R. N., Failing, K., Georgii, S., Brunn, H. E., & Stahl, T. (2014) · Chemosphere · doi:10.1016/j.chemosphere.2014.06.061 · Cited by 72 · see citing works
Self-citationYeung, L. W. Y., Guruge, K. S., Taniyasu, S., Yamashita, N., Angus, P., & Herath, C. B. (2013) · Ecotoxicology and Environmental Safety · doi:10.1016/j.ecoenv.2013.06.006 · Cited by 61 · see citing works
Herzke, D., Nikiforov, V., Yeung, L. W. Y., Moe, B., Routti, H., Nygård, T., Gabrielsen, G., & Hanssen, L. (2022) · Environment International · doi:10.1016/j.envint.2022.107640 · Cited by 53 · see citing works
Falk, S. R. N., Stahl, T., Fliedner, A., Rüdel, H., Tarricone, K., Brunn, H. E., & Koschorreck, J. (2019) · Environmental Pollution · doi:10.1016/j.envpol.2018.12.095 · Cited by 54 · see citing works
Self-citationTemporal trends (1999–2010) of perfluoroalkyl acids in commonly consumed food items
Johansson, J. H., Berger, U., Vestergren, R., Cousins, I. T., Bignert, A., Glynn, A. W., & Darnerud, P. O. (2014) · Environmental Pollution · doi:10.1016/j.envpol.2014.01.026 · Cited by 53 · see citing works
D’Hollander, W., Bruyn, L. D., Hagenaars, A., de Voogt, P., & Bervoets, L. (2014) · Environmental Science and Pollution Research · doi:10.1007/s11356-013-2449-4 · Cited by 50 · see citing works
Stahl, T., Falk, S. R. N., Failing, K., Berger, J., Georgii, S., & Brunn, H. E. (2011) · Archives of Environmental Contamination and Toxicology · doi:10.1007/s00244-011-9726-3 · Cited by 46 · see citing works
Self-citationFang, S., Zhang, Y., Zhao, S., Qiang, L., Chen, M., & Zhu, L. Y. (2016) · Environmental Toxicology and Chemistry · doi:10.1002/etc.3483 · Cited by 44 · see citing works
Stahl, T., Gaßmann, M., Falk, S. R. N., & Brunn, H. E. (2018) · Journal of Agricultural and Food Chemistry · doi:10.1021/acs.jafc.8b03063 · Cited by 45 · see citing works
Self-citationRoos, A. M., Berger, U., Järnberg, U., van Dijk, J., & Bignert, A. (2013) · Environmental Science & Technology · doi:10.1021/es401485t · Cited by 41 · see citing works
Kowalczyk, J., Numata, J., Zimmermann, B., Klinger, R. J., Habedank, F., Just, P., Schafft, H. A., & Lahrssen‐Wiederholt, M. (2018) · Archives of Environmental Contamination and Toxicology · doi:10.1007/s00244-018-0552-8 · Cited by 40 · see citing works
Guckert, M., Rupp, J., Nürenberg, G., Nödler, K., Koschorreck, J., Berger, U., Drost, W., Siebert, U., Wibbelt, G., & Reemtsma, T. (2023) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2023.162361 · Cited by 38 · see citing works
Wang, Y., Yao, J., Dai, J., Ma, L., Liu, D., Xu, H., Cui, Q., Ma, J., & Zhang, H. (2020) · Environmental Pollution · doi:10.1016/j.envpol.2020.114805 · Cited by 37 · see citing works
Impact of environmental pollution on PCDD/F and PCB bioaccumulation in game animals
Warenik-Bany, M., Maszewski, S., Mikołajczyk, S., & Piskorska-Pliszczyńska, J. (2019) · Environmental Pollution · doi:10.1016/j.envpol.2019.113159 · Cited by 32 · see citing works
Cui, Q., Shi, F., Pan, Y., Zhang, H., & Dai, J. (2019) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2019.04.118 · Cited by 32 · see citing works
Arioli, F., Ceriani, F., Nobile, M., Vigano', R., Besozzi, M., Panseri, S., & Chiesa, L. M. (2019) · Food Additives & Contaminants Part A · doi:10.1080/19440049.2019.1627003 · Cited by 29 · see citing works
Perfluorinated Alkyl Acids in Wildlife
Reiner, J. L., & Place, B. J. (2015) · Molecular and integrative toxicology · doi:10.1007/978-3-319-15518-0_5 · Cited by 29 · see citing works
Perfluoroalkyl substances in circum-ArcticRangifer: caribou and reindeer
Roos, A. M., Gamberg, M., Muir, D. C. G., Kärrman, A., Carlsson, P., Cuyler, C., Lind, Y. S., Bossi, R., & Rigét, F. F. (2021) · Environmental Science and Pollution Research · doi:10.1007/s11356-021-16729-7 · Cited by 21 · see citing works
Riebe, R. A., Falk, S. R. N., Georgii, S., Brunn, H. E., Failing, K., & Stahl, T. (2015) · Archives of Environmental Contamination and Toxicology · doi:10.1007/s00244-015-0250-8 · Cited by 21 · see citing works
Self-citationSpatio-temporal variation of metals and organic contaminants in bank voles (Myodes glareolus)
Ecke, F., Benskin, J. P., Berglund, Å. M. M., de Wit, C. A., Engström, E., Plassmann, M. M., Rodushkin, I., Sörlin, D., & Hörnfeldt, B. (2020) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2019.136353 · Cited by 22 · see citing works
Feng, Q.-J., Luo, X., Ye, M., Hu, K., Zeng, Y., & Mai, B. (2023) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2023.167008 · Cited by 19 · see citing works
Ecke, F., Ytrehus, B., Evander, M., Hörnfeldt, B., Leijon, A., Malmsten, J., Skrobonja, A., & Ahrens, L. (2025) · Scientific Reports · doi:10.1038/s41598-025-16395-6 · Cited by 16 · see citing works
Tavoloni, T., Stramenga, A., Stecconi, T., Gavaudan, S., Moscati, L., Sagratini, G., Siracusa, M., Ciriaci, M., Dubbini, A., & Piersanti, A. (2022) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2022.159745 · Cited by 14 · see citing works
Draghi, S., Curone, G., Risoluti, R., Materazzi, S., Gullifa, G., Amoresano, A., Spinelli, M., Fontanarosa, C., Pavlović, R., Pellegrini, A., et al. (2024) · Frontiers in Veterinary Science · doi:10.3389/fvets.2024.1500651 · Cited by 10 · see citing works
Draghi, S., Curone, G., Pavlović, R., Cesare, F. D., Cagnardi, P., Silva, C. F., Pellegrini, A., Riva, F., Arioli, F., & Fidani, M. (2024) · Animals · doi:10.3390/ani14040529 · Cited by 7 · see citing works
LaSharr, K., Scher, D. P., Streets, S. S., Carstensen, M., Keller, B., & Kelly, J. (2025) · Chemosphere · doi:10.1016/j.chemosphere.2025.144642 · Cited by 4 · see citing works
Mateus-Vargas, R. H., Numata, J., Mader, A., Knapp, H., Georgii, S., Falk, S. R. N., Habedank, F., Pieper, R., Steinhoff‐Wagner, J., & Kowalczyk, J. (2025) · Journal of Consumer Protection and Food Safety · doi:10.1007/s00003-025-01550-y · Cited by 3 · see citing works
Self-citationDifferential prevalence of PFAS, PCBs and pesticides in liver of hunted game
Esther, A., Peter, M., Ritz, V., Esther, D., Gabriel, D., Trommler, R., Schenke, D., Polaczek, K., Fisch, K., & Müller, C. R. (2026) · Environmental Science and Pollution Research · doi:10.1007/s11356-026-37805-w · Cited by 2 · see citing works
Accumulation of per- and polyfluoroalkyl substances (PFAS) in a terrestrial food web
Ecke, F., Skrobonja, A., Malmsten, J., & Ahrens, L. (2023) · doi:10.1101/2023.12.12.571392 · Cited by 2 · see citing works
Tracking the impact of PFAS regulations: Long-Term analysis of roe deer livers from 1998 until 2022
Müller, V., Preihs, M., Caldeira, T. I., Göckener, B., Mesko, M. F., Koschorreck, J., & Feldmann, J. (2026) · Environmental Pollution · doi:10.1016/j.envpol.2026.127685 · Cited by 1 · see citing works
Stramenga, A., Tavoloni, T., Lucidi, E., Griffoni, F., Ciriaci, M., Gobbi, M., Ranucci, A., Siracusa, M., Bacchiocchi, S., & Piersanti, A. (2026) · Chemosphere · doi:10.1016/j.chemosphere.2026.144873 · Cited by 1 · see citing works
Korzekwa, A. J., Kowalik, M. K., Boztepe, G., Gogola-Mruk, J., & Ptak, A. (2026) · Polish Journal of Veterinary Sciences · doi:10.24425/pjvs.2026.1282 · Cited by 1 · see citing works
Stark, M. L., Wagner, B., Kowalczyk, J., Spolders, M., Schafft, H. A., & Lahrssen‐Wiederholt, M. (2016) · Journal of Consumer Protection and Food Safety · doi:10.1007/s00003-015-1010-4 · Cited by 1 · see citing works
Spatial Modeling for Elucidation of Perfluorinated Compound Sources and Fate in a Watershed
Zushi, Y., & Masunaga, S. (2014) · Wiley eBooks · doi:10.1002/9781118339558.ch26
Luo, X., Feng, Q.-J., Ye, M., Hu, K., Zeng, Y., & Mai, B. (2023) · SSRN Electronic Journal · doi:10.2139/ssrn.4500465
Pulster, E. L., Kolpin, D. W., Givens, C. E., Hladik, M. L., Keele, L. M., Meppelink, S. M., Rodriguez, M. D., Alvarez, D. A., Williams, B. M., Gordon, S. E., et al. (2026) · Environmental Research · doi:10.1016/j.envres.2026.125817
- Authors
- Falk, S., Brunn, H., Schröter-Kermani, C., Failing, K., Georgii, S., Tarricone, K., & Stahl, T.
- Affiliations
- Justus-Liebig-Universität Gießen (DE)
- Universität Trier (DE)
- Corresponding author
- Stahl, Thorsten
- Venue
- Environmental Pollution
- Publisher
- Elsevier BV
- Published
- 2012-12
- Volume
- 171
- Pages
- 1-8
- ISSN
- 0269-7491 (ISSN-L)
- OpenAlex
- W2062042491
- Cited by
- 41
- References
- 36
- Citations by year
- 2026: 5 · 2025: 3 · 2024: 2 · 2023: 4 · 2022: 2 · 2021: 3 · 2020: 3 · 2019: 4 · 2018: 3 · 2016: 2 · 2015: 3 · 2014: 4 · 2013: 2
- FWCI
- 2.30
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Environmental Pollution (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Bundesministerium für Umwelt, Naturschutz, nukleare Sicherheit und Verbraucherschutz
- Topics
- Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
- Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmaceutical Science › Fluorine in Organic Chemistry
- Keywords
- perfluorinated compounds, PFAS, roe deer, liver, temporal trends, spatial trends, bioindicators, PFOS, perfluorooctanoic acid, perfluorononanoic acid, perfluorodecanoic acid, bioaccumulation, xenobiotics
- MeSH terms
- Animals, Deer, Environmental Monitoring, Environmental Pollutants, Environmental Pollution, Fluorocarbons, Germany, Liver
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