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Author |
Michelle G. Nerentorp Mastromonaco, Katarina Gårdfeldt, Sarka Langer, Aurélien Dommergue |
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Title |
Seasonal Study of Mercury Species in the Antarctic Sea Ice Environment |
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Journal |
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Year |
2016 |
Publication |
Environmental science & technology |
Abbreviated Journal |
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Volume |
50 |
Issue |
23 |
Pages |
12705-12712 |
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Abstract |
Limited studies have been conducted on mercury concentrations in the polar cryosphere and the factors affecting the distribution of mercury within sea ice and snow are poorly understood. Here we present the first comprehensive seasonal study of elemental and total mercury concentrations in the Antarctic sea ice environment covering data from measurements in air, sea ice, seawater, snow, frost flowers, and brine. The average concentration of total mercury in sea ice decreased from winter (9.7 ng L–1) to spring (4.7 ng L–1) while the average elemental mercury concentration increased from winter (0.07 ng L–1) to summer (0.105 ng L–1). The opposite trends suggest potential photo- or dark oxidation/reduction processes within the ice and an eventual loss of mercury via brine drainage or gas evasion of elemental mercury. Our results indicate a seasonal variation of mercury species in the polar sea ice environment probably due to varying factors such as solar radiation, temperature, brine volume, and atmospheric deposition. This study shows that the sea ice environment is a significant interphase between the polar ocean and the atmosphere and should be accounted for when studying how climate change may affect the mercury cycle in polar regions. |
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1028 |
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0013-936X |
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0013-936X |
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yes |
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6595 |
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Author |
Marina Renedo, David Amouroux, Bastien Duval, Alice Carravieri, Emmanuel Tessier, Julien Barre, Sylvain Bérail, Zoyne Pedrero, Yves Cherel, Paco Bustamante |
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Title |
Seabird Tissues As Efficient Biomonitoring Tools for Hg Isotopic Investigations: Implications of Using Blood and Feathers from Chicks and Adults |
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Journal |
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Year |
2018 |
Publication |
Environmental Science & Technology |
Abbreviated Journal |
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Volume |
52 |
Issue |
7 |
Pages |
4227-4234 |
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Abstract |
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. |
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109 |
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0013-936X |
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0013-936X |
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yes |
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7507 |
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Author |
Khouloud El Hanafi, Zoyne Pedrero, Laurent Ouerdane, Claudia Marchán Moreno, Silvia Queipo-Abad, Maite Bueno, Florence Pannier, Warren T. Corns, Yves Cherel, Paco Bustamante, David Amouroux |
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Title |
First Time Identification of Selenoneine in Seabirds and Its Potential Role in Mercury Detoxification |
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Year |
2022 |
Publication |
Environmental Science & Technology |
Abbreviated Journal |
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Volume |
56 |
Issue |
5 |
Pages |
3288-3298 |
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Abstract |
Birds are principally exposed to selenium (Se) through their diet. In long-lived and top predator seabirds, such as the giant petrel, extremely high concentrations of Se are found. Selenium speciation in biota has aroused great interest in recent years; however, there is a lack of information about the chemical form of Se in (sea)birds. The majority of publications focus on the growth performance and antioxidant status in broilers in relation to Se dietary supplementation. The present work combines elemental and molecular mass spectrometry for the characterization of Se species in wild (sea)birds. A set of eight giant petrels (Macronectes sp.) with a broad age range from the Southern Ocean were studied. Selenoneine, a Se-analogue of ergothioneine, was identified for the first time in wild avian species. This novel Se-compound, previously reported in fish, constitutes the major Se species in the water-soluble fraction of all of the internal tissues and blood samples analyzed. The levels of selenoneine found in giant petrels are the highest reported in animal tissues until now, supporting the trophic transfer in the marine food web. The characterization of selenoneine in the brain, representing between 78 and 88% of the total Se, suggests a crucial role in the nervous system. The dramatic decrease of selenoneine (from 68 to 3%) with an increase of Hg concentrations in the liver strongly supports the hypothesis of its key role in Hg detoxification. |
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109 |
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0013-936X |
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0013-936X |
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yes |
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Call Number |
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Serial |
7730 |
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Author |
Pierre Blévin, Sabrina Tartu, Hugh I. Ellis, Olivier Chastel, Paco Bustamante, Charline Parenteau, Dorte Herzke, Frédéric Angelier, Geir W. Gabrielsen |
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Title |
Contaminants and energy expenditure in an Arctic seabird: Organochlorine pesticides and perfluoroalkyl substances are associated with metabolic rate in a contrasted manner |
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Journal |
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Year |
2017 |
Publication |
Environmental Research |
Abbreviated Journal |
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Volume |
157 |
Issue |
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Pages |
118-126 |
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Keywords |
Black-legged kittiwake BMR Mercury Organic contaminants Thyroid hormones |
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Abstract |
Basal metabolic rate (BMR), the minimal energetic cost of living in endotherms, is known to be influenced by thyroid hormones (THs) which are known to stimulate in vitro oxygen consumption of tissues in birds and mammals. Several environmental contaminants may act on energy expenditure through their thyroid hormone-disrupting properties. However, the effect of contaminants on BMR is still poorly documented for wildlife. Here, we investigated the relationships between three groups of contaminants (organochlorines (OCs), perfluoroalkyl substances (PFASs), and mercury) with metabolic rate (MR), considered here as a proxy of BMR and also with circulating total THs (thyroxine (TT4) and triiodothyronine (TT3)) in Arctic breeding adult black-legged kittiwakes (Rissa tridactyla) from Svalbard, during the chick rearing period. Our results indicate a negative relationship between the sum of all detected chlordanes (∑CHLs) and MR in both sexes whereas perfluorotridecanoate (PFTrA) and MR were positively related in females only. MR was not associated with mercury. Additionally, levels of TT3 were negatively related to ∑CHLs but not to PFTrA. The findings from the present study indicate that some OCs (in both sexes) and some PFASs (only in females) could disrupt fine adjustment of BMR during reproduction in adult kittiwakes. Importantly, highly lipophilic OCs and highly proteinophilic PFASs appear, at least in females, to have the ability to disrupt the metabolic rate in an opposite way. Therefore, our study highlights the need for ecotoxicological studies to include a large variety of contaminants which can act in an antagonistic manner. |
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330 |
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ISSN |
0013-9351 |
ISBN |
0013-9351 |
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yes |
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Call Number |
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Serial |
6980 |
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Author |
David Costantini, Pierre Blévin, Dorte Herzke, Børge Moe, Geir Wing Gabrielsen, Jan Ove Bustnes, Olivier Chastel |
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Title |
Higher plasma oxidative damage and lower plasma antioxidant defences in an Arctic seabird exposed to longer perfluoroalkyl acids |
Type |
Journal |
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Year |
2018 |
Publication |
Environmental Research |
Abbreviated Journal |
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Volume |
168 |
Issue |
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Pages |
278-285 |
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Keywords |
Antioxidants Birds Kittiwake PFASs Svalbard |
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Abstract |
Perfluoroalkyl and polyfluoroalkyl substances (PFASs) may cause detrimental effects on physiological function and reproduction of Arctic animals. However, there is a paucity of information on the link between PFASs and oxidative stress, which can have potential detrimental effects on key fitness traits, such as cellular homeostasis or reproduction. We have examined the correlations between multiple blood-based markers of oxidative status and several perfluoroalkyl acids (i.e., with 8 or more carbons) in male Arctic black-legged kittiwakes (Rissa tridactyla) during the pre-laying period. Higher protein oxidative damage was found in those birds having higher concentrations of perfluorododecanoic acid (PFDoA), perfluorotridecanoic acid (PFTriA) and perfluorotetradecanoic acid (PFTeA). Lower plasmatic non-enzymatic micro-molecular antioxidants were found in those birds having higher concentrations of perfluoroundecanoic acid (PFUnA), PFDoA and PFTeA. Effect size estimates showed that the significant correlations between PFASs and oxidative status markers were intermediate to strong. The non-enzymatic antioxidant capacity (including antioxidants of protein origin) was significantly lower in those birds having higher plasma concentration of linear perfluorooctanesulfonic acid (PFOSlin). In contrast, the activity of the antioxidant enzyme glutathione peroxidase in erythrocytes was not associated with any PFAS compounds. Our results suggest that increased oxidative stress might be one consequence of long-chain PFAS exposure. Experimental work will be needed to demonstrate whether PFASs cause toxic effects on free-living vertebrates through increased oxidative stress. |
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Programme |
330 |
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ISSN |
0013-9351 |
ISBN |
0013-9351 |
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Approved |
yes |
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Call Number |
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Serial |
7480 |
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Author |
Fay Rémi, Barbraud Christophe, Delord Karine, Weimerskirch Henri |
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Title |
Variation in the age of first reproduction: different strategies or individual quality? |
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Journal |
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Year |
2016 |
Publication |
Ecology |
Abbreviated Journal |
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Volume |
97 |
Issue |
7 |
Pages |
1842-1851 |
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Keywords |
capture–mark–recapture individual heterogeneity life‐history plasticity reaction norm trade‐off Wandering Albatross |
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Abstract |
Abstract Although age at first reproduction is a key demographic parameter that is probably under high selective pressure, it is highly variable and the cause of this variability is not well understood. Two non?exclusive hypotheses may explain such variability. It could be the expression of different individual strategies, i.e., different allocation strategies in fitness components, or the consequences of individual difference in intrinsic quality, i.e., some individuals always doing better than others in all fitness components. We tested these hypotheses in the Wandering Albatross investigating relationships between the age at first reproduction and subsequent adult demographic traits. Using finite mixture capture recapture modeling, we demonstrate that the age at first reproduction is negatively related to both reproductive performances and adult survival, suggesting that individual quality was an important factor explaining variation in the age at first reproduction. Our results suggest that age at first breeding is a good predictor of quality in this long?lived seabird species. |
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Programme |
109 |
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ISSN |
0012-9658 |
ISBN |
0012-9658 |
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yes |
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Serial |
6603 |
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Author |
Youngflesh Casey, Jenouvrier Stephanie, Li Yun, Ji Rubao, Ainley David G., Ballard Grant, Barbraud Christophe, Delord Karine, Dugger Katie M., Emmerson Louise M., Fraser William R., Hinke Jefferson T., Lyver Phil O’B., Olmastroni Silvia, Southwell Colin J., Trivelpiece Susan G., Trivelpiece Wayne Z., Lynch Heather J. |
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Title |
Circumpolar analysis of the Adélie Penguin reveals the importance of environmental variability in phenological mismatch |
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Journal |
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Year |
2017 |
Publication |
Ecology |
Abbreviated Journal |
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Volume |
98 |
Issue |
4 |
Pages |
940-951 |
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Programme |
109 |
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ISSN |
0012-9658 |
ISBN |
0012-9658 |
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Approved |
yes |
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Call Number |
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Serial |
6652 |
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Author |
Fay Rémi, Barbraud Christophe, Delord Karine, Weimerskirch Henri |
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Title |
From early life to senescence: individual heterogeneity in a long‐lived seabird |
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Journal |
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Year |
2017 |
Publication |
Ecological Monographs |
Abbreviated Journal |
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Volume |
88 |
Issue |
1 |
Pages |
60-73 |
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Programme |
109 |
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ISSN |
0012-9615 |
ISBN |
0012-9615 |
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yes |
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Call Number |
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Serial |
6661 |
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Author |
Camille Bréant, Christophe Leroy Dos Santos, Cécile Agosta, Mathieu Casado, Elise Fourré, Sentia Goursaud, Valérie Masson-Delmotte, Vincent Favier, Olivier Cattani, Frédéric Prié, Benjamin Golly, Anaïs Orsi, Patricia Martinerie, Amaëlle Landais |
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Title |
Coastal water vapor isotopic composition driven by katabatic wind variability in summer at Dumont d'Urville, coastal East Antarctica |
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Journal |
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Year |
2019 |
Publication |
Earth and Planetary Science Letters |
Abbreviated Journal |
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Volume |
514 |
Issue |
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Pages |
37-47 |
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Keywords |
Antarctica katabatic wind water isotopes |
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Abstract |
Dumont d'Urville station, located on the East coast of Antarctica in Adélie Land, is in one of the windiest coastal region on Earth, due to katabatic winds downslope from the East Antarctic ice sheet. In summer, the season of interest in this study, coastal weather is characterized by well-marked diel cycles in temperature and wind patterns. Our study aims at exploring the added value of water vapor stable isotopes in coastal Adélie Land to provide new information on the local atmospheric water cycle and climate. An important application is the interpretation of water isotopic profiles in snow and ice cores recently drilled in Adélie Land. We present the first continuous measurements of δ18O and d-excess in water vapor over Adélie Land. During our measurements period (26/12/2016 to 03/02/2017), we observed clear diel cycles in terms of temperature, humidity and isotopic composition. The cycles in isotopic composition are particularly large given the muted variations in temperature when compared to other Antarctic sites where similar monitoring have been performed. Based on data analyses and simulations obtained with the regional MAR model on the coastal Adélie Land, we suggest that the driver for δ18O and d-excess diel variability in summer at Dumont d'Urville is the variation of the strength of the wind coming from the continent: the periods with strong wind are associated with the arrival of relatively dry air with water vapor associated with low δ18O and high d-excess from the Antarctic plateau. Finally, in addition to the interpretation of snow and ice core isotopic profiles in the coastal regions, our study has implications for the evaluation of atmospheric models equipped with water isotopes. |
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Programme |
411,1205 |
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Thesis |
Bachelor's thesis |
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ISSN |
0012-821X |
ISBN |
0012-821X |
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yes |
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Call Number |
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7465 |
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Author |
Carolina Mallol, Auréade Henry |
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Title |
Ethnoarchaeology of Paleolithic Fire: Methodological Considerations |
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Journal |
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Year |
2017 |
Publication |
Current Anthropology |
Abbreviated Journal |
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Volume |
58 |
Issue |
S16 |
Pages |
S217-S229 |
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Keywords |
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Abstract |
Most of the ethnoarchaeological literature on hearths is scattered within general works that target many different aspects of foraging or hunter-gatherer societies. Although these works are a good source of ideas and clues for the interpretation of macroscopically observable features of Paleolithic hearths, there is hardly any high-resolution ethnoarchaeological reference material with which to compare microstratigraphic evidence of archaeological fire. Our ethnoarchaeological research at this scale has focused on exploring differential preservation of open-air hearths and the potential to identify fire-related activities and different variables of fire technology (fuel, temperature, and function) using micromorphological and anthracological analysis. Although these studies have been useful sources of analogy, further case studies as well as ethnoarchaeological examples of superposed and imbricated hearths and reference material from enclosed settings such as caves and rock shelters are strongly called for. In this paper we summarize and discuss aspects of our previous work to highlight the strengths and weaknesses of the ethnoarchaeological approach for the study of Paleolithic fire and propose possible avenues for future research on the topic. |
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Programme |
1140 |
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ISSN |
0011-3204 |
ISBN |
0011-3204 |
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Approved |
yes |
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Call Number |
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Serial |
6926 |
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| Permanent link to this record |
