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Seabird Tissues As Efficient Biomonitoring Tools for Hg Isotopic Investigations: Implications of Using Blood and Feathers from Chicks and Adults
- Source :
- Environmental Science & Technology, Environmental Science & Technology, American Chemical Society, 2018, 52 (7), pp.4227-4234. ⟨10.1021/acs.est.8b00422⟩, Environmental Science and Technology, Environmental Science and Technology, American Chemical Society, 2018, 52 (7), pp.4227-4234. ⟨10.1021/acs.est.8b00422⟩, Environmental Science & Technology, American Chemical Society, 2018, 52 (7), pp.4227-4234. 〈10.1021/acs.est.8b00422〉
- Publication Year :
- 2018
- Publisher :
- HAL CCSD, 2018.
-
Abstract
- International audience; Blood and feathers are the two most targeted avian tissues for environmental biomonitoring studies, with mercury (Hg) concentration in blood and body feathers reflecting short and long-term Hg exposure, respectively. In this work, we investigated how Hg isotopic composition (e.g., δ202Hg and Δ199Hg) of blood and feathers from either seabird chicks (skuas, n = 40) or adults (penguins, n = 62) can accurately provide information on exposure to Hg in marine ecosystems. Our results indicate a strong correlation between blood and feather Hg isotopic values for skua chicks, with similar δ202Hg and Δ199Hg values in the two tissues (mean difference: −0.01 ± 0.25 ‰ and −0.05 ± 0.12 ‰, respectively). Since blood and body feathers of chicks integrate the same temporal window of Hg exposure, this suggests that δ202Hg and Δ199Hg values can be directly compared without any correction factors within and between avian groups. Conversely, penguin adults show higher δ202Hg and Δ199Hg values in feathers than in blood (mean differences: 0.28 ± 0.19‰ and 0.25 ± 0.13‰), most likely due to tissue-specific Hg temporal integration. Since feathers integrate long-term (i.e., the intermoult period) Hg accumulation, whereas blood reflects short-term (i.e., seasonal) Hg exposure in adult birds, the two tissues provide complementary information on trophic ecology at different time scales.
- Subjects :
- Food Chain
animal structures
010504 meteorology & atmospheric sciences
Zoology
chemistry.chemical_element
010501 environmental sciences
01 natural sciences
Skua
[ SDE ] Environmental Sciences
biology.animal
Biomonitoring
Environmental Chemistry
Animals
14. Life underwater
marine ecosystems
Ecosystem
0105 earth and related environmental sciences
Trophic level
biology
IF : 6.198
General Chemistry
Mercury
skua
Feathers
biology.organism_classification
Mercury (element)
penguins
bioaccumulation
chemistry
Feather
visual_art
Bioaccumulation
bioindicators
visual_art.visual_art_medium
[SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology
Seabird
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Bioindicator
Hg isotopes
Environmental Monitoring
Subjects
Details
- Language :
- English
- ISSN :
- 0013936X and 15205851
- Database :
- OpenAIRE
- Journal :
- Environmental Science & Technology, Environmental Science & Technology, American Chemical Society, 2018, 52 (7), pp.4227-4234. ⟨10.1021/acs.est.8b00422⟩, Environmental Science and Technology, Environmental Science and Technology, American Chemical Society, 2018, 52 (7), pp.4227-4234. ⟨10.1021/acs.est.8b00422⟩, Environmental Science & Technology, American Chemical Society, 2018, 52 (7), pp.4227-4234. 〈10.1021/acs.est.8b00422〉
- Accession number :
- edsair.doi.dedup.....9b1e226d3ae86d33a76b077f89938c1b