Exposure of an endangered seabird species to persistent organic pollutants: Assessing levels in blood and link with reproductive parameters

被引:2
|
作者
Campioni, Letizia [1 ]
Oro-Nolla, Bernat [2 ]
Granadeiro, Jose P. [3 ]
Silva, Monica C. [4 ]
Madeiros, Jeremy [5 ]
Gjerdrum, Carina [6 ]
Lacorte, Silvia [2 ]
机构
[1] Ispa Inst Univ, ARNET Aquat Res Network, MARE Marine & Environm Sci Ctr, P-1149041 Lisbon, Portugal
[2] CSIC, IDAEA, Dept Environm Chem, Jordi Girona 18, Barcelona 08034, Spain
[3] Univ Lisbon, Fac Ciencias, CESAM Ctr Environm & Marine Studies, Dept Biol Anim, P-1749016 Lisbon, Portugal
[4] Univ Lisbon, CHANGE Global Change & Sustainabil Inst, Fac Ciencias, CE3C Ctr Ecol Evolut & Environm Changes, P-1749016 Lisbon, Portugal
[5] Minist Environm, Dept Environm & Nat Resources, POB FL588,FL BX, Flatts, Bermuda
[6] Canadian Wildlife Serv, Dartmouth, NS B2Y 2N6, Canada
关键词
Bioaccumulation; Hatching success; Organochlorines; Pesticide; Pterodroma; PCB; AROMATIC-HYDROCARBONS PAHS; EGGSHELL THICKNESS; OFFSHORE OIL; ATLANTIC; BIRDS; NORTH; DDT; PCB; EGG; ORGANOCHLORINES;
D O I
10.1016/j.scitotenv.2024.172814
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Ocean contamination, particularly from persistent organic pollutants (POPs), remains a significant threat to marine predators that occupy high trophic positions. Long-lived procellariform seabirds are apex predators in marine ecosystems and tend to accumulate contaminants. Prolonged exposure to pollutants negatively affects their fitness including reproductive success. Low breeding success may represent a hurdle for the restoration of small and endangered seabird populations, including several highly threatened gadfly petrels. Here we investigated the annual variation (2019 and 2022) in organochlorine pesticide (OCP), polychlorinated biphenyl ether (PCB), polybrominated diphenyl ether (PBDE), and polycyclic aromatic hydrocarbon (PAH) exposure in the endangered Bermuda petrel (Pterodroma cahow), and the relationship between female contaminant burden and breeding parameters. We found that petrels were exposed to a wide range of pollutants (33 out of 55 showed measurable levels) with PCBs dominating the blood contaminant profiles in both years. Only 9 compounds were detected in >50 % of the birds. Specifically, among OCPs, p, p'-DDE and hexaclorobenzene were the most frequently detected while fluorene and acenaphthene were the most common PAH. The concentrations of & sum;(5)PCBs and & sum;(7)POPs were higher in older birds. Furthermore, females with greater contaminant burdens laid eggs with a lower probability of hatching. However, female investment in egg production (size and volume) was unrelated to their blood contaminant load. Overall, this study highlights the presence of a wide range of contaminants in the petrel's food web, and it sheds light on the potential impact of chronic exposure to sub-lethal levels of PCBs on the breeding success of seabirds. We claim that toxicological testing should be a practice integrated in the management of seabirds, particularly of endangered species to monitor how past and present anthropogenic activities impact their conservation status.
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页数:10
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