| Records |
| Author |
Bethany L. Clark, Ana PB Carneiro, Elizabeth J. Pearmain, Marie-Morgane Rouyer, Thomas A. Clay, Win Cowger, Richard A. Phillips, Andrea Manica, Carolina Hazin, Marcus Eriksen, Jacob González-Solís, Josh Adams, Yuri V. Albores-Barajas, Joanna Alfaro-Shigueto, Maria Saldanha Alho, Deusa Teixeira Araujo, José Manuel Arcos, John PY Arnould, Nadito JP Barbosa, Christophe Barbraud, Annalea M. Beard, Jessie Beck, Elizabeth A. Bell, Della G. Bennet, Maud Berlincourt, Manuel Biscoito, Oskar K. Bjørnstad, Mark Bolton, Katherine A. Booth Jones, John J. Borg, Karen Bourgeois, Vincent Bretagnolle, Joël Bried, James V. Briskie, M. de L. Brooke, Katherine C. Brownlie, Leandro Bugoni, Licia Calabrese, Letizia Campioni, Mark J. Carey, Ryan D. Carle, Nicholas Carlile, Ana R. Carreiro, Paulo Catry, Teresa Catry, Jacopo G. Cecere, Filipe R. Ceia, Yves Cherel, Chang-Yong Choi, Marco Cianchetti-Benedetti, Rohan H. Clarke, Jaimie B. Cleeland, Valentina Colodro, Bradley C. Congdon, Jóhannis Danielsen, Federico De Pascalis, Zoe Deakin, Nina Dehnhard, Giacomo Dell'Omo, Karine Delord, Sébastien Descamps, Ben J. Dilley, Herculano A. Dinis, Jerome Dubos, Brendon J. Dunphy, Louise M. Emmerson, Ana Isabel Fagundes, Annette L. Fayet, Jonathan J. Felis, Johannes H. Fischer, Amanda ND Freeman, Aymeric Fromant, Giorgia Gaibani, David García, Carina Gjerdrum, Ivandra Soeli Gonçalves Correia Gomes, Manuela G. Forero, José P. Granadeiro, W. James Grecian, David Grémillet, Tim Guilford, Gunnar Thor Hallgrimsson, Luke R. Halpin, Erpur Snær Hansen, April Hedd, Morten Helberg, Halfdan H. Helgason, Leeann M. Henry, Hannah FR Hereward, Marcos Hernandez-Montero, Mark A. Hindell, Peter J. Hodum, Simona Imperio, Audrey Jaeger, Mark Jessopp, Patrick GR Jodice, Carl G. Jones, Christopher W. Jones, Jón Einar Jónsson, Adam Kane, Sven Kapelj, Yuna Kim, Holly Kirk, Yann Kolbeinsson, Philipp L. Kraemer, Lucas Krüger, Paulo Lago, Todd J. Landers, Jennifer L. Lavers, Matthieu Le Corre, Andreia Leal, Maite Louzao, Jeremy Madeiros, Maria Magalhães, Mark L. Mallory, Juan F. Masello, Bruno Massa, Sakiko Matsumoto, Fiona McDuie, Laura McFarlane Tranquilla, Fernando Medrano, Benjamin J. Metzger, Teresa Militão, William A. Montevecchi, Rosalinda C. Montone, Leia Navarro-Herrero, Verónica C. Neves, David G. Nicholls, Malcolm AC Nicoll, Ken Norris, Steffen Oppel, Daniel Oro, Ellie Owen, Oliver Padget, Vítor H. Paiva, David Pala, Jorge M. Pereira, Clara Péron, Maria V. Petry, Admilton de Pina, Ariete T. Moreira Pina, Patrick Pinet, Pierre A. Pistorius, Ingrid L. Pollet, Benjamin J. Porter, Timothée A. Poupart, Christopher DL Powell, Carolina B. Proaño, Júlia Pujol-Casado, Petra Quillfeldt, John L. Quinn, Andre F. Raine, Helen Raine, Iván Ramírez, Jaime A. Ramos, Raül Ramos, Andreas Ravache, Matt J. Rayner, Timothy A. Reid, Gregory J. Robertson, Gerard J. Rocamora, Dominic P. Rollinson, Robert A. Ronconi, Andreu Rotger, Diego Rubolini, Kevin Ruhomaun, Asunción Ruiz, James C. Russell, Peter G. Ryan, Sarah Saldanha, Ana Sanz-Aguilar, Mariona Sardà-Serra, Yvan G. Satgé, Katsufumi Sato, Wiebke C. Schäfer, Stefan Schoombie, Scott A. Shaffer, Nirmal Shah, Akiko Shoji, Dave Shutler, Ingvar A. Sigurðsson, Mónica C. Silva, Alison E. Small, Cecilia Soldatini, Hallvard Strøm, Christopher A. Surman, Akinori Takahashi, Vikash RV Tatayah, Graeme A. Taylor, Robert J. Thomas, David R. Thompson, Paul M. Thompson, Thorkell L. Thórarinsson, Diego Vicente-Sastre, Eric Vidal, Ewan D. Wakefield, Susan M. Waugh, Henri Weimerskirch, Heiko U. Wittmer, Takashi Yamamoto, Ken Yoda, Carlos B. Zavalaga, Francis J. Zino, Maria P. Dias |
| Title |
Global assessment of marine plastic exposure risk for oceanic birds. |
Type |
Journal |
Year  |
2023 |
Publication |
Nature communications |
Abbreviated Journal |
|
| Volume |
14 |
Issue |
|
Pages |
3665 |
| Keywords |
|
| Abstract |
Plastic pollution is distributed patchily around the world's oceans. Likewise, marine organisms that are vulnerable to plastic ingestion or entanglement have uneven distributions. Understanding where wildlife encounters plastic is crucial for targeting research and mitigation. Oceanic seabirds, particularly petrels, frequently ingest plastic, are highly threatened, and cover vast distances during foraging and migration. However, the spatial overlap between petrels and plastics is poorly understood. Here we combine marine plastic density estimates with individual movement data for 7137 birds of 77 petrel species to estimate relative exposure risk. We identify high exposure risk areas in the Mediterranean and Black seas, and the northeast Pacific, northwest Pacific, South Atlantic and southwest Indian oceans. Plastic exposure risk varies greatly among species and populations, and between breeding and non-breeding seasons. Exposure risk is disproportionately high for Threatened species. Outside the Mediterranean and Black seas, exposure risk is highest in the high seas and Exclusive Economic Zones (EEZs) of the USA, Japan, and the UK. Birds generally had higher plastic exposure risk outside the EEZ of the country where they breed. We identify conservation and research priorities, and highlight that international collaboration is key to addressing the impacts of marine plastic on wide-ranging species. |
| Programme |
388 |
| Campaign |
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| Corporate Author |
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Thesis |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
2041-1723 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8681 |
| Permanent link to this record |
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| Author |
Pauline Douce, Florian Mermillod‐blondin, Laurent Simon, Sylvain Dolédec, Pauline Eymar‐dauphin, David Renault, Cécile Sulmon, Félix Vallier, Anne-Kristel Bittebiere |
| Title |
Biotic and abiotic drivers of aquatic plant communities in shallow pools and wallows on the sub‐Antarctic Iles Kerguelen |
Type |
Journal |
| Year |
2023 |
Publication |
Polar Biology |
Abbreviated Journal |
|
| Volume |
46 |
Issue |
4 |
Pages |
303 |
| Keywords |
|
| 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. |
| Programme |
136 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
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ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
|
Serial |
8682 |
| Permanent link to this record |
| |
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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 |
| Title |
HIP 33609 b: An Eccentric Brown Dwarf Transiting a V = 7.3 Rapidly Rotating B Star |
Type |
Journal |
| Year |
2023 |
Publication |
The Astronomical Journal |
Abbreviated Journal |
|
| Volume |
165 |
Issue |
6 |
Pages |
268 |
| Keywords |
|
| 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. |
| Programme |
1066 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
|
Summary Language |
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Original Title |
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| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
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| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
1538-3881 |
ISBN |
1538-3881 |
Medium |
|
| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8683 |
| Permanent link to this record |
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| Author |
A. Kokori, A. Tsiaras, B. Edwards, A. Jones, G. Pantelidou, G. Tinetti, L. Bewersdorff, A. Iliadou, Y. Jongen, G. Lekkas, A. Nastasi, E. Poultourtzidis, C. Sidiropoulos, F. Walter, A. Wünsche, R. Abraham, V. K. Agnihotri, R. Albanesi, E. Arce-Mansego, D. Arnot, M. Audejean, C. Aumasson, M. Bachschmidt, G. Baj, P. R. Barroy, A. A. Belinski, D. Bennett, P. Benni, K. Bernacki, L. Betti, A. Biagini, P. Bosch, P. Brandebourg, L. Brát, M. Bretton, S. M. Brincat, S. Brouillard, A. Bruzas, A. Bruzzone, R. A. Buckland, M. Caló, F. Campos, A. Carreño, J. A. Carrion Rodrigo, R. Casali, G. Casalnuovo, M. Cataneo, C.-M. Chang, L. Changeat, V. Chowdhury, R. Ciantini, M. Cilluffo, J.-F. Coliac, G. Conzo, M. Correa, G. Coulon, N. Crouzet, M. V. Crow, I. A. Curtis, D. Daniel, B. Dauchet, S. Dawes, M. Deldem, D. Deligeorgopoulos, G. Dransfield, R. Dymock, T. Eenmäe, N. Esseiva, P. Evans, C. Falco, R. G. Farfán, E. Fernández-Lajús, S. Ferratfiat, S. L. Ferreira, A. Ferretti, J. Fiołka, M. Fowler, S. R. Futcher, D. Gabellini, T. Gainey, J. Gaitan, P. Gajdoš, A. García-Sánchez, J. Garlitz, C. Gillier, C. Gison, J. Gonzales, D. Gorshanov, F. Grau Horta, G. Grivas, P. Guerra, T. Guillot, C. A. Haswell, T. Haymes, V.-P. Hentunen, K. Hills, K. Hose, T. Humbert, F. Hurter, T. Hynek, M. Irzyk, J. Jacobsen, A. L. Jannetta, K. Johnson, P. Jóźwik-Wabik, A. E. Kaeouach, W. Kang, H. Kiiskinen, T. Kim, Ü Kivila, B. Koch, U. Kolb, H. Kučáková, S.-P. Lai, D. Laloum, S. Lasota, L. A. Lewis, G.-I. Liakos, F. Libotte, F. Lomoz, C. Lopresti, R. Majewski, A. Malcher, M. Mallonn, M. Mannucci, A. Marchini, J.-M. Mari, A. Marino, G. Marino, J.-C. Mario, J.-B. Marquette, F. A. Martínez-Bravo, M. Mašek, P. Matassa, P. Michel, J. Michelet, M. Miller, E. Miny, D. Molina, T. Mollier, B. Monteleone, N. Montigiani, M. Morales-Aimar, F. Mortari, M. Morvan, L. V. Mugnai, G. Murawski, L. Naponiello, J.-L. Naudin, R. Naves, D. Néel, R. Neito, S. Neveu, A. Noschese, Y. Öğmen, O. Ohshima, Z. Orbanic, E. P. Pace, C. Pantacchini, N. I. Paschalis, C. Pereira, I. Peretto, V. Perroud, M. Phillips, P. Pintr, J.-B. Pioppa, J. Plazas, A. J. Poelarends, A. Popowicz, J. Purcell, N. Quinn, M. Raetz, D. Rees, F. Regembal, M. Rocchetto, P.-F. Rocci, M. Rockenbauer, R. Roth, L. Rousselot, X. Rubia, N. Ruocco, E. Russo, M. Salisbury, F. Salvaggio, A. Santos, J. Savage, F. Scaggiante, D. Sedita, S. Shadick, A. F. Silva, N. Sioulas, V. Školník, M. Smith, M. Smolka, A. Solmaz, N. Stanbury, D. Stouraitis, T.-G. Tan, M. Theusner, G. Thurston, F. P. Tifner, A. Tomacelli, A. Tomatis, J. Trnka, M. Tylšar, P. Valeau, J.-P. Vignes, A. Villa, A. Vives Sureda, K. Vora, M. Vrašt’ák, D. Walliang, B. Wenzel, D. E. Wright, R. Zambelli, M. Zhang, M. Zíbar |
| Title |
ExoClock Project. III. 450 New Exoplanet Ephemerides from Ground and Space Observations |
Type |
Journal |
| Year |
2023 |
Publication |
The Astrophysical Journal Supplement Series |
Abbreviated Journal |
|
| Volume |
265 |
Issue |
1 |
Pages |
4 |
| Keywords |
|
| Abstract |
The ExoClock project has been created to increase the efficiency of the Ariel mission. It will achieve this by continuously monitoring and updating the ephemerides of Ariel candidates, in order to produce a consistent catalog of reliable and precise ephemerides. This work presents a homogenous catalog of updated ephemerides for 450 planets, generated by the integration of ∼18,000 data points from multiple sources. These sources include observations from ground-based telescopes (the ExoClock network and the Exoplanet Transit Database), midtime values from the literature, and light curves from space telescopes (Kepler, K2, and TESS). With all the above, we manage to collect observations for half of the postdiscovery years (median), with data that have a median uncertainty less than 1 minute. In comparison with the literature, the ephemerides generated by the project are more precise and less biased. More than 40% of the initial literature ephemerides had to be updated to reach the goals of the project, as they were either of low precision or drifting. Moreover, the integrated approach of the project enables both the monitoring of the majority of the Ariel candidates (95%), and also the identification of missing data. These results highlight the need for continuous monitoring to increase the observing coverage of the candidate planets. Finally, the extended observing coverage of planets allows us to detect trends (transit-timing variations) for a sample of 19 planets. All the products, data, and codes used in this work are open and accessible to the wider scientific community. |
| Programme |
1066 |
| Campaign |
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| Address |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0067-0049 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8684 |
| Permanent link to this record |
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| Author |
Guillaume Schwob, Léa Cabrol, Thomas Saucède, Karin Gérard, Elie Poulin, Julieta Orlando |
| Title |
Unveiling the co-phylogeny signal between plunderfish Harpagifer spp. and their gut microbiomes across the Southern Ocean |
Type |
Journal |
| Year |
2023 |
Publication |
Biorxiv |
Abbreviated Journal |
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| Volume |
|
Issue |
|
Pages |
|
| Keywords |
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| Abstract |
Understanding the factors that sculpt fish gut microbiome is challenging, especially in natural populations characterized by high environmental and host genomic complexity. Yet, closely related hosts are valuable models for deciphering the contribution of host evolutionary history to microbiome assembly, through the underscoring of phylosymbiosis and co-phylogeny patterns. Here, we hypothesized that the recent allopatric speciation of Harpagifer across the Southern Ocean (1.2–0.8 Myr) will promote the detection of robust phylogenetic congruence between the host and its microbiome. We characterized the gut mucosa microbiome of 77 individuals from four field-collected species of the plunderfish Harpagifer (Teleostei, Notothenioidei), distributed across three biogeographic regions of the Southern Ocean. We found that seawater physicochemical properties, host phylogeny and geography collectively explained 35% of the variation in bacterial community composition in Harpagifer gut mucosa. The core microbiome of Harpagifer spp. gut mucosa was characterized by a low diversity, mostly driven by selective processes, and dominated by a single Aliivibrio taxon detected in more than 80% of the individuals. Almost half of the core microbiome taxa, including Aliivibrio, harbored co-phylogeny signal at microdiversity resolution with Harpagifer phylogeny. This suggests an intimate symbiotic relationship and a shared evolutionary history with Harpagifer. The robust phylosymbiosis signal emphasizes the relevance of the Harpagifer model to understanding the contribution of fish evolutionary history to the gut microbiome assembly. We propose that the recent allopatric speciation of Harpagifer across the Southern Ocean may have generated the diversification of Aliivibrio into patterns recapitulating the host phylogeny. Importance Although challenging to detect in wild populations, phylogenetic congruence between marine fish and its microbiome is critical, as it allows highlighting potential intimate associations between the hosts and ecologically relevant microbial symbionts.Through a natural system consisting of closely related fish species of the Southern Ocean, our study provides foundational information about the contribution of host evolutionary trajectory on gut microbiome assembly, that represents an important yet underappreciated driver of the global marine fish holobiont. Notably, we unveiled striking evidence of co-diversification between Harpagifer and its microbiome, demonstrating both phylosymbiosis of gut bacterial communities, and co-phylogeny of specific bacterial symbionts, in patterns that mirror the host diversification. Considering the increasing threats that fish species are facing in the Southern Ocean, understanding how the host evolutionary history could drive its microbial symbiont diversification represents a major challenge to better predict the consequences of environmental disturbances on microbiome and host fitness. |
| Programme |
1044 |
| Campaign |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8685 |
| Permanent link to this record |
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| Author |
Jérémy Grenier, Najat Bhiry, Armelle Decaulne |
| Title |
Meteorological conditions and snow-avalanche occurrence over three snow seasons (2017–2020) in Tasiapik Valley, Umiujaq, Nunavik |
Type |
Journal |
| Year |
2023 |
Publication |
Arctic, Antarctic, and Alpine Research |
Abbreviated Journal |
|
| Volume |
55 |
Issue |
1 |
Pages |
2194492 |
| Keywords |
Nunavik snow avalanches Time-lapse cameras weather data |
| Abstract |
In this article, we study snow avalanche activity during the snow seasons of 2017–2020 using four automatic time-lapse cameras strategically positioned along the southwestern slope of Tasiapik Valley, near the village of Umiujaq, in Nunavik (northern Québec, Canada). Over the three snow seasons, cameras helped to detect evidence of 130 avalanche events, scattered over seventy-eight distinct avalanche days. The evolution of weather conditions prior to each avalanche release was detailed according to data from a nearby weather station. Moreover, the time of release, the release type, the surface texture, and whether rocky material was present in the deposits were documented from the photographs. To explore relationships between weather data and avalanche releases, conditional inference tree (CIT) analysis was conducted. Results of the CIT analysis showed that there are different weather patterns associated with avalanche releases depending on the season, and significant thresholds values were defined. In winter, the avalanche probability was greater when three-day snowfall total exceeded 10 cm. In spring, the avalanche probability was greater when cumulative melting degree-days were less than forty-six and when daily minimum air temperature was greater than 2°C. Moreover, cornice failures were found to be a major component of the avalanche dynamic in Tasiapik Valley, mainly because of the slope’s morphology. They have also been the cause of the three largest volume and longest runout avalanches observed by cameras in this study, highlighting potential risks for local communities. The probability of observing cornice failures is enhanced on days when maximum air temperature is greater than −8°C in winter conditions, whereas in spring conditions it is enhanced by daily maximum air temperature greater than 2.5°C. This study represents a necessary first step toward avalanche forecasting based on weather data in Nunavik. Efforts should be continued given the expected higher frequency of natural hazards in northern regions as a consequence of recent climate changes. |
| Programme |
1148 |
| Campaign |
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| Address |
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| Corporate Author |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1523-0430 |
ISBN |
|
Medium |
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| Area |
|
Expedition |
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Conference |
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| Notes |
|
Approved |
yes |
| Call Number |
|
Serial |
8695 |
| Permanent link to this record |
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| Author |
Cara-Paige Green, David B. Green, Norman Ratcliffe, David Thompson, Mary-Anne Lea, Alastair M. M. Baylis, Alexander L. Bond, Charles-André Bost, Sarah Crofts, Richard J. Cuthbert, Jacob González-Solís, Kyle W. Morrison, Maud Poisbleau, Klemens Pütz, Andrea Raya Rey, Peter G. Ryan, Paul M. Sagar, Antje Steinfurth, Jean-Baptiste Thiebot, Megan Tierney, Thomas Otto Whitehead, Simon Wotherspoon, Mark A. Hindell |
| Title |
Potential for redistribution of post-moult habitat for Eudyptes penguins in the Southern Ocean under future climate conditions |
Type |
Journal |
| Year |
2023 |
Publication |
Global Change Biology |
Abbreviated Journal |
|
| Volume |
29 |
Issue |
3 |
Pages |
648-667 |
| Keywords |
climate change habitat preference models migration overwinter species redistributions Subantarctic penguins |
| Abstract |
Anthropogenic climate change is resulting in spatial redistributions of many species. We assessed the potential effects of climate change on an abundant and widely distributed group of diving birds, Eudyptes penguins, which are the main avian consumers in the Southern Ocean in terms of biomass consumption. Despite their abundance, several of these species have undergone population declines over the past century, potentially due to changing oceanography and prey availability over the important winter months. We used light-based geolocation tracking data for 485 individuals deployed between 2006 and 2020 across 10 of the major breeding locations for five taxa of Eudyptes penguins. We used boosted regression tree modelling to quantify post-moult habitat preference for southern rockhopper (E. chrysocome), eastern rockhopper (E. filholi), northern rockhopper (E. moseleyi) and macaroni/royal (E. chrysolophus and E. schlegeli) penguins. We then modelled their redistribution under two climate change scenarios, representative concentration pathways RCP4.5 and RCP8.5 (for the end of the century, 2071–2100). As climate forcings differ regionally, we quantified redistribution in the Atlantic, Central Indian, East Indian, West Pacific and East Pacific regions. We found sea surface temperature and sea surface height to be the most important predictors of current habitat for these penguins; physical features that are changing rapidly in the Southern Ocean. Our results indicated that the less severe RCP4.5 would lead to less habitat loss than the more severe RCP8.5. The five taxa of penguin may experience a general poleward redistribution of their preferred habitat, but with contrasting effects in the (i) change in total area of preferred habitat under climate change (ii) according to geographic region and (iii) the species (macaroni/royal vs. rockhopper populations). Our results provide further understanding on the regional impacts and vulnerability of species to climate change. |
| Programme |
394 |
| Campaign |
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| Address |
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| Corporate Author |
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| Publisher |
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Place of Publication |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1365-2486 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
|
Serial |
8696 |
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| Author |
Kozue Shiomi, Katsufumi Sato, Charles A. Bost, Yves Handrich |
| Title |
Stay the course: maintenance of consistent orientation by commuting penguins both underwater and at the water surface |
Type |
Journal |
| Year |
2023 |
Publication |
Marine Biology |
Abbreviated Journal |
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| Volume |
170 |
Issue |
4 |
Pages |
42 |
| Keywords |
Bearing Compass Diving bird Navigation Orientation |
| Abstract |
Many marine vertebrates traverse more than hundreds of kilometres of the ocean. To efficiently achieve such long-distance movements, the ability to maintain orientation in a three-dimensional space is essential; however, it remains unevaluated in most species. In this study, we examined the bearing distributions of penguins undertaking long-distance foraging trips and compared their bearing consistency between underwater and at the water surface, as well as between night and day, to quantify their orientation ability. The subject species, king penguins, Aptenodytes patagonicus, from Possession Island, Crozet archipelago (46°25′S, 51°45′E; January to March 2011), showed high bearing consistency both during dives and at the water surface whilst commuting towards/from their main foraging area, the Antarctic polar front. Their bearing consistency was particularly high during and after shallow dives, irrespective of the time of day. Meanwhile, their bearings tended to vary during and after deep dives, particularly in the middle of the trip, probably owing to underwater foraging movements. However, the overall directions of deep dives during the commuting phases were similar to those of shallow dives and post-dive periods at the water surface. These findings indicate that king penguins employ compass mechanism(s) that are equivalently reliable both underwater and at the water surface, at any time of the day. This orientation ability appears to enable them to achieve long-distance trips under strong temporal constraints. Further studies on the fine-scale bearing distributions of other diving vertebrates are needed to better understand movement strategies in marine environments. |
| Programme |
394 |
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Place of Publication |
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Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1432-1793 |
ISBN |
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Medium |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8697 |
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| Author |
Elodie Da Silva, Emma R. Woolliams, Nicolas Picot, Jean-Christophe Poisson, Henriette Skourup, Geir Moholdt, Sara Fleury, Sajedeh Behnia, Vincent Favier, Laurent Arnaud, Jérémie Aublanc, Valentin Fouqueau, Nicolas Taburet, Julien Renou, Hervé Yesou, Angelica Tarpanelli, Stefania Camici, Renée Mie Fredensborg Hansen, Karina Nielsen, Frédéric Vivier, François Boy, Roger Fjørtoft, Mathilde Cancet, Ramiro Ferrari, Ghislain Picard, Mohammad J. Tourian, Nicolaas Sneeuw, Eric Munesa, Michel Calzas, Adrien Paris, Emmanuel Le Meur, Antoine Rabatel, Guillaume Valladeau, Pascal Bonnefond, Sylvie Labroue, Ole Andersen, Mahmoud El Hajj, Filomena Catapano, Pierre Féménias |
| Title |
Towards Operational Fiducial Reference Measurement (FRM) Data for the Calibration and Validation of the Sentinel-3 Surface Topography Mission over Inland Waters, Sea Ice, and Land Ice |
Type |
Journal |
| Year |
2023 |
Publication |
Remote Sensing |
Abbreviated Journal |
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| Volume |
15 |
Issue |
19 |
Pages |
4826 |
| Keywords |
FRM inland water surface height land ice height S3 land STM SAR altimeter sea ice thickness uncertainties |
| Abstract |
The Copernicus Sentinel-3 Surface Topography Mission (STM) Land Altimetry provides valuable surface elevation information over inland waters, sea ice, and land ice, thanks to its synthetic aperture radar (SAR) altimeter and its orbit that covers high-latitude polar regions. To ensure that these measurements are reliable and to maximise the return on investment, adequate validation of the geophysical retrieval methods, processing algorithms, and corrections must be performed using independent observations. The EU-ESA project St3TART (started July 2021) aims to generalise the concept of Fiducial Reference Measurements (FRMs) for the Copernicus Sentinel-3 STM. This work has gathered existing data, made new observations during field campaigns, and ensured that these observations meet the criteria of FRM standards so that they can be used to validate Sentinel-3 STM Land Altimetry products operationally. A roadmap for the operational provision of the FRM, including the definition, consolidation, and identification of the most relevant and cost-effective methods and protocols to be maintained, supported, or implemented, has been developed. The roadmap includes guidelines for SI traceability, definitions of FRM measurement procedures, processing methods, and uncertainty budget estimations. |
| Programme |
411 |
| Campaign |
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| Address |
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Thesis |
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Place of Publication |
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Summary Language |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
2072-4292 |
ISBN |
2072-4292 |
Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8698 |
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| Author |
Christophe Leroy-Dos Santos, Elise Fourré, Cécile Agosta, Mathieu Casado, Alexandre Cauquoin, Martin Werner, Benedicte Minster, Frédéric Prié, Olivier Jossoud, Leila Petit, Amaëlle Landais |
| Title |
From atmospheric water isotopes measurement to firn core interpretation in Adélie Land: a case study for isotope-enabled atmospheric models in Antarctica |
Type |
Journal |
| Year |
2023 |
Publication |
The Cryosphere |
Abbreviated Journal |
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| Volume |
17 |
Issue |
12 |
Pages |
5241-5254 |
| Keywords |
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| Abstract |
In a context of global warming and sea level rise acceleration, it is key to estimate the evolution of the atmospheric hydrological cycle and temperature in polar regions, which directly influence the surface mass balance of the Arctic and Antarctic ice sheets. Direct observations are available from satellite data for the last 40 years and a few weather data since the 1950s in Antarctica. One of the best ways to access longer records is to use climate proxies in firn or ice cores. The water isotopic composition in these cores is widely used to reconstruct past temperature variations. We need to progress in our understanding of the influence of the atmospheric hydrological cycle on the water isotopic composition of ice cores. First, we present a 2-year-long time series of vapor and precipitation isotopic composition measurement at Dumont d’Urville Station, in Adélie Land. We characterize diurnal variations of meteorological parameters (temperature, atmospheric water mixing ratio (hereafter humidity) and δ18O) for the different seasons and determine the evolution of key relationships (δ18O versus temperature or humidity) throughout the year: we find that the temperature vs. δ18O relationship is dependent on synoptic events dynamics in winter contrary to summer. Then, this data set is used to evaluate the atmospheric general circulation model ECHAM6-wiso (model version with embedded water stable isotopes) in a coastal region of Adélie Land where local conditions are controlled by strong katabatic winds which directly impact the isotopic signal. We show that a combination of continental (79 %) and oceanic (21 %) grid cells leads model outputs (temperature, humidity and δ18O) to nicely fit the observations, at different timescales (i.e., seasonal to synoptic). Therefore we demonstrate the added value of long-term water vapor isotopic composition records for model evaluation. Then, as a clear link is found between the isotopic composition of water vapor and precipitation, we assess how isotopic models can help interpret short firn cores. In fact, a virtual firn core built from ECHAM-wiso outputs explains much more of the variability observed in S1C1 isotopic record than a virtual firn core built from temperature only. Yet, deposition and post-deposition effects strongly affect the firn isotopic signal and probably account for most of the remaining misfits between archived firn signal and virtual firn core based on atmospheric modeling. |
| Programme |
1110,1205 |
| Campaign |
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Thesis |
Bachelor's thesis |
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Place of Publication |
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Editor |
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Summary Language |
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Original Title |
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Series Title |
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Series Issue |
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Edition |
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| ISSN |
1994-0416 |
ISBN |
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Medium |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8699 |
| Permanent link to this record |
