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Padayachee K, Reynolds C, Mateo R, Amar A. A global review of the temporal and spatial patterns of DDT and dieldrin monitoring in raptors. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159734. [PMID: 36349626 DOI: 10.1016/j.scitotenv.2022.159734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 10/17/2022] [Accepted: 10/22/2022] [Indexed: 06/16/2023]
Abstract
Concentrations of organochlorine pesticides have been extensively monitored in birds, particularly from higher trophic guilds such as raptors. While monitoring of raptors has been ongoing for decades, patterns from monitoring activities have never been summarised on a global scale. In this study, we undertake a review to better describe the monitoring of two widespread organochlorine pesticides monitored globally in raptors, DDT and dieldrin. We provide a historical retrospective on the monitoring effort of a global environmental issue. Sampling was heavily biased geographically to the global north, with more than 90 % of studies conducted in this socio-geographic region, most from Europe and North America. Although monitoring occurred from at least 114 species, most samples came from relatively few species, with three species (Eurasian Sparrowhawk Accipiter nisus, Bald Eagle Haliaeetus leucocephalus, and Peregrine Falcon Falco peregrinus) comprising 50 % of samples. The types of raptors sampled have changed over time, with avian and mammal specialists dominating samples until the 1970s, but more diverse dietary guilds monitored in later decades, and greater proportions of samples coming from generalist species. The three most sampled tissues (egg, liver, and plasma) comprised 84 % of all samples. Eggs were the earliest tissue examined and the only tissue sampled in all decades. The geographical bias in monitoring effort and relatively narrow species focus, suggests that patterns in these pesticides are unlikely to be fully representative of all global environments occupied by raptors. While DDT has been banned throughout most of the global north, it remains in use in the global south, yet monitoring effort in the south, does not match that of the north. While monitoring remains prevalent in the global north, contemporary monitoring is limited in the global south with less than 10 % of raptors sampled in Asia, Africa, and South America, over the last 3 decades.
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Affiliation(s)
- Kailen Padayachee
- The Fitzpatrick Institute of African Ornithology, University of Cape Town, South Africa, Private Bag X3, Rondebosch 7701, Cape Town, South Africa.
| | - Chevonne Reynolds
- School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, Johannesburg South Africa, Private Bag 3 Wits, 2050 Johannesburg, South Africa.
| | - Rafael Mateo
- Instituto de Investigación en Recursos Cinegéticos (IREC-CSIC, UCLM, JCCM), Ronda de Toledo, 12, 13005 Ciudad Real, Spain.
| | - Arjun Amar
- The Fitzpatrick Institute of African Ornithology, University of Cape Town, South Africa, Private Bag X3, Rondebosch 7701, Cape Town, South Africa.
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de Solla SR, King LE, Gilroy ÈAM. Environmental exposure to non-steroidal anti-inflammatory drugs and potential contribution to eggshell thinning in birds. ENVIRONMENT INTERNATIONAL 2023; 171:107638. [PMID: 36542999 DOI: 10.1016/j.envint.2022.107638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 10/17/2022] [Accepted: 11/14/2022] [Indexed: 06/17/2023]
Abstract
Abnormally thin eggshells can reduce avian reproductive success, and have caused rapid population declines. The best known examples of this phenomenon are the widespread population crashes in birds, mostly raptors, fish eating birds, and scavengers, caused by the pesticide DDT and its isomers in the 1960s. A variety of other chemicals have been reported to cause eggshell thinning. Non-steroidal anti-inflammatory drugs (NSAIDs), which are extensively and increasingly used in human and veterinary medicine, may be one particularly concerning group of chemicals that demonstrate an ability to impair eggshell development, based both on laboratory studies and on their known mechanism of action. In this review, we outline environmental and wildlife exposure to NSAIDs, describe the process of eggshell formation, and discuss pathways affected by NSAIDs. We list pharmaceuticals, including NSAIDs, and other compounds demonstrated to reduce eggshell thickness, and highlight their main mechanisms of action. Dosing studies empirically demonstrated that NSAIDs reduce eggshell thickness through cyclooxygenase inhibition, which suppresses prostaglandin synthesis and reduces the calcium available for the mineralization of eggshell. Using the US EPA's CompTox Chemicals Dashboard, we show that NSAIDs are predicted to strongly inhibit cyclooxygenases. NSAIDs have been observed both in the putative diet of scavenging birds, and we report examples of NSAIDs detected in eggs or tissues of wild and captive Old World vultures. We suggest that NSAIDs in the environment represent a hazard that could impair reproduction in wild birds.
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Affiliation(s)
- Shane R de Solla
- Ecotoxicology and Wildlife Health Division, Environment and Climate Change Canada, 867 Lakeshore Road, Burlington, ON L7S 1A1, Canada.
| | - Laura E King
- Ecotoxicology and Wildlife Health Division, Environment and Climate Change Canada, 867 Lakeshore Road, Burlington, ON L7S 1A1, Canada
| | - Ève A M Gilroy
- Aquatic Contaminants Research Division, Environment and Climate Change Canada, 867 Lakeshore Road, Burlington, ON L7S 1A1, Canada
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Monclús L, Løseth ME, Dahlberg Persson MJ, Eulaers I, Kleven O, Covaci A, Benskin JP, Awad R, Zubrod JP, Schulz R, Wabakken P, Heggøy O, Øien IJ, Steinsvåg MJ, Jaspers VLB, Nygård T. Legacy and emerging organohalogenated compounds in feathers of Eurasian eagle-owls (Bubo bubo) in Norway: Spatiotemporal variations and associations with dietary proxies (δ 13C and δ 15N). ENVIRONMENTAL RESEARCH 2022; 204:112372. [PMID: 34774833 DOI: 10.1016/j.envres.2021.112372] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 11/05/2021] [Accepted: 11/08/2021] [Indexed: 06/13/2023]
Abstract
The occurrence of organohalogenated compounds (OHCs) in wildlife has received considerable attention over the last decades. Among the matrices used for OHCs biomonitoring, feathers are particularly useful as they can be collected in a minimally or non-invasive manner. In this study, concentrations of various legacy OHCs -polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs) and polybrominated diphenyl ethers (PBDEs)-, as well as emerging OHCs -per- and polyfluoroalkyl substances (PFAS) and organophosphate ester flame retardants (OPEs)- were determined in feathers of 72 Eurasian eagle-owls (Bubo bubo) from Norway, with the goal of studying spatiotemporal variation using a non-invasive approach. Molted feathers were collected at nest sites from northern, central and southern Norway across four summers (2013-2016). Additionally, two museum-archived feathers from 1979 to 1989 were included. Stable carbon (δ13C) and nitrogen isotopes (δ15N) were used as dietary proxies. In total, 11 PFAS (sum range 8.25-215.90 ng g-1), 15 PCBs (4.19-430.01 ng g-1), 6 OCPs (1.48-220.94 ng g-1), 5 PBDEs (0.21-5.32 ng g-1) and 3 OPEs (4.49-222.21 ng g-1) were quantified. While we observed large variation in the values of both stable isotopes, suggesting a diverse diet of the eagle-owls, only δ13C seemed to explain variation in PFAS concentrations. Geographic area and year were influential factors for δ15N and δ13C. Considerable spatial variation was observed in PFAS levels, with the southern area showing higher levels compared to northern and central Norway. For the rest of OHCs, we observed between-year variations; sum concentrations of PCBs, OCPs, PBDEs and OPEs reached a maximum in 2015 and 2016. Concentrations from 1979 to 1989 were within the ranges observed between 2013 and 2016. Overall, our data indicate high levels of legacy and emerging OHCs in a top predator in Norway, further highlighting the risk posed by OHCs to wildlife.
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Affiliation(s)
- Laura Monclús
- Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, 7491, Trondheim, Norway.
| | - Mari Engvig Løseth
- Norwegian Geotechnical Institute (NGI), Sognsveien 72, 0855, Oslo, Norway
| | - Marie J Dahlberg Persson
- Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, 7491, Trondheim, Norway
| | - Igor Eulaers
- Norwegian Polar Institute, FRAM Centre, 9296, Tromsø, Norway
| | - Oddmund Kleven
- Norwegian Institute for Nature Research (NINA), Høgskoleringen 9, 7034, Trondheim, Norway
| | - Adrian Covaci
- Toxicological Centre, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium
| | - Jonathan P Benskin
- Stockholm University, Department of Environmental Science, SE-106 91, Stockholm, Sweden
| | - Raed Awad
- Stockholm University, Department of Environmental Science, SE-106 91, Stockholm, Sweden; IVL Swedish Environmental Research Institute, 10031, Stockholm, Sweden
| | - Jochen P Zubrod
- University of Koblenz-Landau, IES Landau, Fortstrasse 7, 76829, Landau, Germany; Zubrod Environmental Data Science, Friesenstrasse 20, 76829, Landau, Germany
| | - Ralf Schulz
- University of Koblenz-Landau, IES Landau, Fortstrasse 7, 76829, Landau, Germany
| | - Petter Wabakken
- Faculty of Applied Ecology, Agricultural Sciences and Biochemistry, Inland Norway University of Applied Sciences, Evenstad, 2480, Koppang, Norway
| | - Oddvar Heggøy
- BirdLife Norway, Sandgata 30b, 7012, Trondheim, Norway; University Museum of Bergen, University of Bergen, 5020, Bergen, Norway
| | | | - Magnus Johan Steinsvåg
- Department of Environmental Affairs, County Governor of Vestland, 6863, Leikanger, Norway
| | - Veerle L B Jaspers
- Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, 7491, Trondheim, Norway
| | - Torgeir Nygård
- Norwegian Institute for Nature Research (NINA), Høgskoleringen 9, 7034, Trondheim, Norway
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