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Melissa L. Grunst, Andrea S. Grunst, David Grémillet, Akiko Kato, Paco Bustamante, Céline Albert, Émile Brisson-Curadeau, Manon Clairbaux, Marta Cruz-Flores, Sophie Gentès, Antoine Grissot, Samuel Perret, Eric Ste-Marie, Dariusz Jakubas, Katarzyna Wojczulanis-Jakubas, Jérôme Fort |
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Title |
A keystone avian predator faces elevated energy expenditure in a warming Arctic |
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Journal |
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Year  |
2023 |
Publication |
Ecology |
Abbreviated Journal |
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Volume |
104 |
Issue |
5 |
Pages |
e4034 |
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Keywords |
activity budgets climate change daily energy expenditure dovekie ecotoxicology mercury plasticity sea surface temperature |
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Abstract |
Climate change is transforming bioenergetic landscapes, challenging behavioral and physiological coping mechanisms. A critical question involves whether animals can adjust behavioral patterns and energy expenditure to stabilize fitness given reconfiguration of resource bases, or whether limits to plasticity ultimately compromise energy balance. In the Arctic, rapidly warming temperatures are transforming food webs, making Arctic organisms strong models for understanding biological implications of climate change-related environmental variability. We examined plasticity in the daily energy expenditure (DEE) of an Arctic seabird, the little auk (Alle alle) in response to variability in climate change-sensitive drivers of resource availability, sea surface temperature (SST) and sea ice coverage (SIC), and tested the hypothesis that energetic ceilings and exposure to mercury, an important neurotoxin and endocrine disrupter in marine ecosystems, may limit scope for plasticity. To estimate DEE, we used accelerometer data obtained across years from two colonies exposed to distinct environmental conditions (Ukaleqarteq [UK], East Greenland; Hornsund [HS], Svalbard). We proceeded to model future changes in SST to predict energetic impacts. At UK, high flight costs linked to low SIC and high SST drove DEE from below to above 4 × basal metabolic rate (BMR), a proposed energetic threshold for breeding birds. However, DEE remained below 7 × BMR, an alternative threshold, and did not plateau. Birds at HS experienced higher, relatively invariable SST, and operated above 4 × BMR. Mercury exposure was unrelated to DEE, and fitness remained stable. Thus, plasticity in DEE currently buffers fitness, providing resiliency against climate change. Nevertheless, modeling suggests that continued warming of SST may promote accelerating increases in DEE, which may become unsustainable. |
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388 |
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1939-9170 |
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1939-9170 |
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yes |
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Serial |
8617 |
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Author |
Melissa L. Grunst, Andrea S. Grunst, David Grémillet, Jérôme Fort |
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Title |
Combined threats of climate change and contaminant exposure through the lens of bioenergetics |
Type |
Journal |
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Year |
2023 |
Publication |
Global Change Biology |
Abbreviated Journal |
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Volume |
29 |
Issue |
18 |
Pages |
5139-5168 |
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Keywords |
bioenergetics chemical contaminants climate change energy balance interactive effects physiological acclimatization plasticity temperature |
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Abstract |
Organisms face energetic challenges of climate change in combination with suites of natural and anthropogenic stressors. In particular, chemical contaminant exposure has neurotoxic, endocrine-disrupting, and behavioral effects which may additively or interactively combine with challenges associated with climate change. We used a literature review across animal taxa and contaminant classes, but focused on Arctic endotherms and contaminants important in Arctic ecosystems, to demonstrate potential for interactive effects across five bioenergetic domains: (1) energy supply, (2) energy demand, (3) energy storage, (4) energy allocation tradeoffs, and (5) energy management strategies; and involving four climate change-sensitive environmental stressors: changes in resource availability, temperature, predation risk, and parasitism. Identified examples included relatively equal numbers of synergistic and antagonistic interactions. Synergies are often suggested to be particularly problematic, since they magnify biological effects. However, we emphasize that antagonistic effects on bioenergetic traits can be equally problematic, since they can reflect dampening of beneficial responses and result in negative synergistic effects on fitness. Our review also highlights that empirical demonstrations remain limited, especially in endotherms. Elucidating the nature of climate change-by-contaminant interactive effects on bioenergetic traits will build toward determining overall outcomes for energy balance and fitness. Progressing to determine critical species, life stages, and target areas in which transformative effects arise will aid in forecasting broad-scale bioenergetic outcomes under global change scenarios. |
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388 |
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1365-2486 |
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1365-2486 |
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yes |
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Serial |
8622 |
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Author |
Melissa L. Grunst, Andrea S. Grunst, David Grémillet, Jérôme Fort |
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Title |
Avian Energetics in a Warming Arctic |
Type |
Journal |
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Year |
2023 |
Publication |
The Bulletin of the Ecological Society of America |
Abbreviated Journal |
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Volume |
104 |
Issue |
3 |
Pages |
e2073 |
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Abstract |
The Arctic is warming nearly four times as rapidly as other regions of the planet, challenging the capacity of organisms to cope with shifting resources and maintain thermal balance. Tracking responses of free-living animals in dynamic environments can be challenging, but is increasingly enabled by advanced biologging approaches. We used data gathered from miniaturized bird-borne devices to demonstrate increases in energy expenditure with declining sea ice conditions and warming sea surface temperatures in a dove-sized seabird, the little auk (also named dovekie; Alle alle). This keystone species feeds on sea ice-associated copepods and inhabits large breeding colonies in the High Arctic. |
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388 |
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ISSN |
2327-6096 |
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yes |
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Serial |
8618 |
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Mojtahid M., Fossile E., Santoni S., Husum K., Streuff K., Forwick M., Howa H., Nardelli MP. |
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Title |
Benthic foraminifera as tools to reconstruct past tidewater glacier dynamics: A case study from Kongsfjorden (Svalbard) |
Type |
Peer-reviewed symposium |
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Year |
2023 |
Publication |
International symposium on foraminifera forams 2023, 26-30 june 2023, perugia, italy |
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1223 |
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yes |
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Serial |
8741 |
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Author |
Nairita Pal, Kristin N. Barton, Mark R. Petersen, Steven R. Brus, Darren Engwirda, Brian K. Arbic, Andrew F. Roberts, Joannes J. Westerink, Damrongsak Wirasaet |
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Title |
Barotropic tides in MPAS-Ocean (E3SM V2): impact of ice shelf cavities |
Type |
Journal |
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Year |
2023 |
Publication |
Geoscientific Model Development |
Abbreviated Journal |
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Volume |
16 |
Issue |
4 |
Pages |
1297-1314 |
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Abstract |
Oceanic tides are seldom represented in Earth system models (ESMs) owing to the need for high horizontal resolution to accurately represent the associated barotropic waves close to coasts. This paper presents results of tides implemented in the Model for Prediction Across Scales–Ocean or MPAS-Ocean, which is the ocean component within the U.S. Department of Energy developed Energy Exascale Earth System Model (E3SM). MPAS-Ocean circumvents the limitation of low resolution using unstructured global meshing. We are at this stage simulating the largest semidiurnal (M2, S2, N2) and diurnal (K1, O1) tidal constituents in a single-layer version of MPAS-O. First, we show that the tidal constituents calculated using MPAS-Ocean closely agree with the results of the global tidal prediction model TPXO8 when suitably tuned topographic wave drag and bottom drag coefficients are employed. Thereafter, we present the sensitivity of global tidal evolution due to the presence of Antarctic ice shelf cavities. The effect of ice shelves on the amplitude and phase of tidal constituents are presented. Lower values of complex errors (with respect to TPXO8 results) for the M2 tidal constituents are observed when the ice shelf is added in the simulations, with particularly strong improvement in the Southern Ocean. Our work points towards future research with varying Antarctic ice shelf geometries and sea ice coupling that might lead to better comparison and prediction of tides and thus better prediction of sea-level rise and also the future climate variability. |
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688 |
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ISSN |
1991-959X |
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yes |
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Call Number |
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Serial |
8619 |
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Author |
Nicolas J., Verdun J., Baltzer A., Boy JP., Lemoine JP., Perosanz F., Tafflet A., |
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Title |
SIGNEAU : Signatures climatiques des surcharges hydrologiques observées par géodésie spatiale |
Type |
Peer-reviewed symposium |
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Year |
2023 |
Publication |
Journées scientifiques de l'OSUNA, 5 juin 2023 |
Abbreviated Journal |
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Programme |
1223 |
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Approved |
yes |
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Call Number |
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Serial |
8738 |
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Author |
Noah Vowell, Joseph E. Rodriguez, Samuel N. Quinn, George Zhou, Andrew Vanderburg, Andrew W. Mann, Matthew J. Hooton, Keivan G. Stassun, Saburo Howard, Allyson Bieryla, David W. Latham, Steve B. Howell, Tristan Guillot, Carl Ziegler, Karen A. Collins, Theron W. Carmichael, Jon M. Jenkins, Avi Shporer, Lyu ABE, Philippe Bendjoya, Jonathan L. Bush, Marco Buttu, Kevin I. Collins, Jason D. Eastman, Matthew J. Fields, Thomas Gasparetto, Maximilian N. Günther, Veselin B. Kostov, Adam L. Kraus, Kathryn V. Lester, Alan M. Levine, Colin Littlefield, Wenceslas Marie-Sainte, Djamel Mékarnia, Hugh P. Osborn, David Rapetti, George R. Ricker, S. Seager, Ramotholo Sefako, Gregor Srdoc, Olga Suarez, Guillermo Torres, Amaury H. M. J. Triaud, R. Vanderspek, Joshua N. Winn |
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Title |
HIP 33609 b: An Eccentric Brown Dwarf Transiting a V = 7.3 Rapidly Rotating B Star |
Type |
Journal |
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Year |
2023 |
Publication |
The Astronomical Journal |
Abbreviated Journal |
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Volume |
165 |
Issue |
6 |
Pages |
268 |
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Keywords |
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Abstract |
We present the discovery and characterization of HIP 33609 b, a transiting warm brown dwarf orbiting a late B star, discovered by NASA's Transiting Exoplanet Survey Satellite as TOI-588 b. HIP 33609 b is a large (R b = R J) brown dwarf on a highly eccentric (e = ) orbit with a 39 days period. The host star is a bright (V = 7.3 mag), T eff = 10,400 K star with a mass of M * = M ⊙ and radius of R * = R ⊙, making it the hottest transiting brown dwarf host star discovered to date. We obtained radial velocity measurements from the CHIRON spectrograph confirming the companion's mass of M b = M J as well as the host star's rotation rate ( km s−1). We also present the discovery of a new comoving group of stars, designated as MELANGE-6, and determine that HIP 33609 is a member. We use a combination of rotation periods and isochrone models fit to the cluster members to estimate an age of 150 ± 25 Myr. With a measured mass, radius, and age, HIP 33609 b becomes a benchmark for substellar evolutionary models. |
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Programme |
1066 |
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ISSN |
1538-3881 |
ISBN |
1538-3881 |
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yes |
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Serial |
8683 |
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Author |
Noiret A., Viblanc V., Bocquet C., Lemmonier C., Lewden A., Robin Jp., Bize P. &Amp; Stier A. |
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Title |
HotPenguin: stress thermique et agressivité soutiennent l’hypothèse température-agression chez le manchot royal en période de reproduction |
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Peer-reviewed symposium |
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Year |
2023 |
Publication |
19émes journées scientifiques du CNFRA, 03-05 mai 2023, Paris France |
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Issue |
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Pages |
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Abstract |
Les endothermes polaires et subpolaires, adaptés à un climat froid, pourraient se révéler particulièrement sensibles au stress thermique dans un contexte de réchauffement global. L'hypothèse température-agression – qui propose un lien causal entre températures ambiantes élevées et motivation agressive – pourrait accentuer le stress thermique. Essentiellement étudiée pour des raisons socio-économiques, l’hypothèse est peu investiguée chez les espèces sauvages. L’étude de manchots royaux en période de reproduction (n= 85, Crozet), a permis de mettre en évidence des relations positives entre paramètres climatiques (température, radiation solaire), température sous-cutanée, indicateurs comportementaux de stress thermique (halètement, écartement des ailerons) et agressivité envers les congénères. Nos résultats ouvrent de nouvelles perspectives écologiques pour l'hypothèse température-agression, et encouragent l'étude du stress thermique dans les écosystèmes polaires. |
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119 |
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yes |
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Serial |
8667 |
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Author |
Olivia Hicks, Akiko Kato, Danuta M. Wisniewska, Coline Marciau, Frédéric Angelier, Yan Ropert-Coudert, Arne Hegemann |
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Title |
Holding time has limited impact on constitutive innate immune function in a long-lived Antarctic seabird, the Adélie penguin: implications for field studies |
Type |
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Year |
2023 |
Publication |
Biology Open |
Abbreviated Journal |
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Volume |
12 |
Issue |
2 |
Pages |
bio059512 |
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Keywords |
Animals Antarctic Antarctic Regions Ecoimmunology Field study Immunity Spheniscidae Stress |
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Abstract |
There is great interest in measuring immune function in wild animals. Yet, field conditions often have methodological challenges related to handling stress, which can alter physiology. Despite general consensus that immune function is influenced by handling stress, previous studies have provided equivocal results. Furthermore, few studies have focused on long-lived species, which may have different stress-immune trade-offs compared to short-lived species that have primarily been tested. Here, we investigate whether capture and handling duration impacts innate immune function in a long-lived seabird, the Adélie penguin (Pygoscelis adeliae). We found no evidence for changes in three commonly used parameters of innate immune function upon holding time of up to 2 h, suggesting that immune function in this species is more robust against handling than in other species. This opens up exciting possibilities for measuring immune function in species with similar life-histories even if samples cannot be taken directly after capture. |
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1091 |
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2046-6390 |
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yes |
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8761 |
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Pauline Douce, Florian Mermillod‐blondin, Laurent Simon, Sylvain Dolédec, Pauline Eymar‐dauphin, David Renault, Cécile Sulmon, Félix Vallier, Anne-Kristel Bittebiere |
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Title |
Biotic and abiotic drivers of aquatic plant communities in shallow pools and wallows on the sub‐Antarctic Iles Kerguelen |
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Year |
2023 |
Publication |
Polar Biology |
Abbreviated Journal |
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Volume |
46 |
Issue |
4 |
Pages |
303 |
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Abstract |
In the sub-Antarctic region, climate change is particularly rapid, while their freshwater ecosystems, such as ponds, host plant species with limited spatial distributions. These particular systems and their plant communities remain however poorly known and the context of their changing habitat calls for deeper insights into these systems. We performed an extensive survey of 45 ponds over three locations of the Iles Kerguelen during the winter and summer seasons of two years, which included the measurement of 12 abiotic parameters and the assessment of the plant community composition. Overall, our results showed that Iles Kerguelen ponds are shallow freshwater ecosystems harbouring species-poor plant communities with high even- ness, of which structure did not vary among the sampled locations. Three different habitats were identified among ponds in relation with nutrient supply by marine animals, which ultimately influenced plant community structure and cover. We highlight that these habitats are mostly determined by water depth, nutrients, and temperature (mean and variance). Present plant community composition was more strongly correlated with plant community composition in the previous year than with abiotic conditions. Overall, this study provides new knowledge on the aquatic plant communities and the functioning of Iles Kerguelen freshwater ecosystems, which can serve as a basis for future studies dealing with the impact of climate change in the sub-Antarctic region. |
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136 |
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yes |
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Call Number |
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8682 |
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