Legacy and emerging contaminants in flamingos' chicks’ blood from the Ebro Delta Natural Park

Dulsat-Masvidal, Maria; Bertolero, Albert; Mateo, Rafael; Lacorte, Sı́lvia

doi:10.1016/j.chemosphere.2022.137205

Cited by 10 publications

(9 citation statements)

References 71 publications

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“…In comparison, we found a median concentration of 1.15 ng/g in adipose tissue across both of our sites (Table 3). A recent paper from Spain (Dulsat‐Masvidal et al, 2023) quantified six PAHs in the blood of greater flamingos ( Phoenicopterus roseus ): naphthalene (range 1.29–50.3 ng/ml), pyrene (0.18–333 ng/ml), fluoranthene (0.13–41.1 ng/ml), acenaphthylene (0.66–23.7 ng/ml), benz[ a ]anthracene (1.95–2.27 ng/ml), and benzo[ ghi ]perylene (2.24–2.24 ng/ml). These studies assessed blood levels, which typically show lower concentrations of POPs when compared to concentrations found in adipose tissues, because of the lipophilic nature of these chemicals, resulting in their tendency to accumulate in the fatty tissues of organisms (Jackson et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Exposure to Persistent Organic Pollutants in Australian Waterbirds

Nzabanita,

Shen,

Grist

et al. 2024

Enviro Toxic and Chemistry

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There is growing worldwide recognition of the threat posed by persistent organic pollutants (POPs) to wildlife populations. We aimed to measure exposure levels to POPs in a Southern Hemisphere aquatic waterbird species, the nomadic grey teal (Anas gracilis), which is found across Australia. We collected wings from 39 ducks harvested by recreational hunters at two sites (one coastal, one inland) in Victoria, south‐eastern Australia, in 2021. We examined three groups of POPs: nine congeners of polychlorinated bi‐phenyls (PCBs), 13 organochlorine pesticides (OCPs), and 12 polycyclic aromatic hydrocarbons (PAHs). PCBs, OCPs and PAHs were detected at quantifiable levels in 13%, 72%, and 100% of birds, respectively. Of the congeners we tested for in PCBs, OCPs, and PAHs, 33%, 38%, and 100% were detected at quantifiable levels, respectively. The highest levels of exposure to POPs that we found was to the PAH, benzo[b]fluoranthene, occurring at a concentration range of 1.78–161.05 ng/g ww. There were some trends detected relating to differences between geographical sites, with higher levels of several PAHs at the coastal versus inland site. There were several strong, positive associations among PAHs found. We discuss potential sources for the POPs detected, including industrial and agricultural sources, and the likely role of large‐scale forest fires in PAH levels. Our results confirm that while Australian waterbirds are exposed to a variety of POPs, exposure levels are currently relatively low. Additional future investigations are required to further characterize POPs within Australian waterbird species.

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Section: Discussionmentioning

confidence: 99%

Exposure to Persistent Organic Pollutants in Australian Waterbirds

Nzabanita,

Shen,

Grist

et al. 2024

Enviro Toxic and Chemistry

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“…The analytical methodology developed to analyze contaminants in blood (Dulsat‐Masvidal et al, 2023) was adapted for the analysis of liver samples. Three different extraction and analytical methods were used: Method A for the determination of OCPs, PCBs, and PAHs; Method B for PFAS; and Method C for the determination of pharmaceuticals, in‐use pesticides, and OPEs.…”

Section: Methodsmentioning

confidence: 99%

“…Samples were analyzed by gas chromatography (GC) coupled to a triple quadrupole mass spectrometer (Agilent 7890A chromatograph and 7000A MS analyzer; Agilent Technologies) with electron ionization at 70 eV. An HP-5MS Agilent column of 30 m length × 0.25 mm inner diameter × 0.25 µm film thickness (Agilent Technologies) was used for the separation of compounds according to a previous method (Dulsat-Masvidal et al, 2023). The initial temperature was set at 70 °C and kept for 1 min, then increased to 175 °C for 4 min, from 175 °C to 235 °C for 20 min, and to 305 °C for 8 min.…”

Section: Sample Extraction and Analysismentioning

confidence: 99%

Assessing Contamination Profiles in Livers from Road‐Killed Owls

Dulsat‐Masvidal,

Lourenço,

Mateo

et al. 2024

Enviro Toxic and Chemistry

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Raptors are recognised as valuable sentinel species for monitoring environmental contaminants owing to their foraging behaviour across terrestrial and aquatic food webs and their high trophic position. This study monitored environmental contaminants in livers from road‐killed owls to evaluate differences in the exposure patterns due to factors as species, age, and sex of individuals. Carcasses of road‐killed individuals of eagle owl (Bubo bubo), long‐eared owl (Asio otus), little owl (Athene noctua), tawny owl (Strix aluco), and barn owl (Tyto alba) were collected in Alentejo (Portugal). Eighty one organic contaminants were analyzed, including organochlorine pesticides (OCPs), perfluoroalkyl substances (PFAS), polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), pharmaceuticals, in‐use pesticides, and organophosphate esters flame retardants (OPEs). Overall, 21 contaminants were detected. ∑OCPs were prevalent in all species at concentrations from 3.24 to 4480 ng/g ww, followed by PFOS, the only PFASs detected (from 2.88 to 848 ng/g ww) and ∑PCBs (1.98 to 2010 ng/g ww). ∑PAHs were ubiquitous but detected at the lowest concentrations (from 7.35 to 123 ng/g ww). Differences among species were observed according to Principal Component Analysis. Eagle owl and long‐eared owl presented the highest levels of ∑OCPs, ∑PCBs, and PFOS, consistently with its higher trophic position while ∑PAHs prevailed in tawny owl, barn owl and little owl, related with their frequent use of urban areas for nesting and roadsides for hunting. Adults presented higher concentrations of ∑OCPs and ∑PCBs than juveniles, while no differences were observed for PFOS and ∑PAHs. Pharmaceuticals, in‐use pesticides and OPEs were not detected. Overall, this study shows specific contamination patterns in 5 species with similar diet but with differences in habitat preferences.

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“…None of the samples from the present study exceeded this threshold. PFOS has been found to be widespread in biota due to its bioaccumulation potential, and its presence has been reported in several bird species, such as gulls and flamingos breeding in the Ebro Delta, one of the most important IBAs in Spain for waterbird conservation [68,69], exemplifying the impact of OMPs exposure on biodiversity and birds. Overall, the water monitoring scheme procedure based on the analysis of in-use chemicals allowed us to determine the IBAs having the highest risk due to chemical pollutants and permitted to prioritize main hazardous compounds and their contamination sources.…”

Section: Geographical Distribution and Environmental Risk Of Chemical...mentioning

confidence: 99%