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Jennifer F. Provencher, Stephanie Borrelle, Richard B. Sherley, Stephanie Avery-Gomm, Peter Hodum, Alex Bond, Heather L. Major, Karen D. McCoy, Rory Crawford, Flemming Merkel, Stephen Votier, Michelle Reynolds, Jeff Hatfield, Dena Spatz, Mark Mallory. (2019). Chapter 7 – Seabirds. Bachelor's thesis, , .
Abstract: Seabirds have a global distribution, are numerous throughout the world’s oceans, and have been used for decades to track and understand changes in the marine environment. They are dependent on a variety of ecosystems, including terrestrial, coastal, and pelagic, and are thus vulnerable to both marine and terrestrial environmental stressors. This chapter examines impacts on seabird populations that occur in the marine environment and are global in nature (touch more than one ocean basin). Both widespread (i.e., climate change induced alterations to marine food webs and sea level rise) and more point-source impacts (i.e., incidental bycatch in fisheries, hunting) are discussed. Additionally, natural occurrences in marine ecosystems (i.e., oceanographic regime shifts, parasites) and issues related to anthropogenic activities (i.e., plastic and oil pollution) are covered. Lastly, we discuss marine protected areas and other efforts aimed at conserving global seabird populations, including colony restoration, community-based research, and international conservation actions.
Keywords: Climate change Conservation Cumulative effects Disease Fisheries Hunting Marine protected areas Pollution Populations Seabirds
Programme: 333
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Prouteau E., P. Téchiné, R. Lhullier, N. Pouvreau. (2019). Création de DOI sur un jeu de données. Bachelor's thesis, , .
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Olivier Chastel, Pierre Blévin, Ségolène Humann-Guilleminot, Fabrice Helfenstein, Sabrina Tartu, Frédéric Angelier, Manrico Seabastiano, David Costantini, Scott Shaffer, Paco Bustamante, Pierre Labadie, Hélène Budzinski, Dorte Herzke, Jan Ove Bustnes, Geir Wing Gabrielsen. (2019). Des poêles... aux pôles : Les Substances Poly- et Perfluoroalkylées et leurs effets chez les oiseaux marins polaires. Bachelor's thesis, , .
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Garnier Mathieu. (2019). Evolution de la taille corporelle et des réserves énergétiques du carabe Amblystogenium pacificum le long d'un gradient altitudinal sur l'île de la Possession (Archipel de Crozet). Bachelor's thesis, , .
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Bédard, A., Bêty, J., Gilg, O., Group, T.i.w., Giroux, M.-a. (2018). Les colonies d’oies supportées par les activités anthropiques dans les écosystèmes tempérés peuvent-elles affecter l’activité des prédateurs de la toundra? Une comparaison multi-sites à l’échelle circumpolaire. Bachelor's thesis, , .
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Mario Lebrato, Dieter Garbe-Schönberg, Marius N. Müller, Sonia Blanco-Ameijeiras, Richard A. Feely, Laura Lorenzoni, Juan-Carlos Molinero, Karen Bremer, Daniel O. B. Jones, Debora Iglesias-Rodriguez, Dana Greeley, Miles D. Lamare, Aurelien Paulmier, Michelle Graco, Joan Cartes, Joana Barcelos e Ramos, Ana de Lara, Ricardo Sanchez-Leal, Paz Jimenez, Flavio E. Paparazzo, Susan E. Hartman, Ulrike Westernströer, Marie Küter, Roberto Benavides, Armindo F. da Silva, Steven Bell, Chris Payne, Solveig Olafsdottir, Kelly Robinson, Liisa M. Jantunen, Alexander Korablev, Richard J. Webster, Elizabeth M. Jones, Olivier Gilg, Pascal Bailly du Bois, Jacek Beldowski, Carin Ashjian, Nejib D. Yahia, Benjamin Twining, Xue-Gang Chen, Li-Chun Tseng, Jiang-Shiou Hwang, Hans-Uwe Dahms, Andreas Oschlies. (2020). Global variability in seawater Mg:Ca and Sr:Ca ratios in the modern ocean (Vol. 117). Bachelor's thesis, , .
Abstract: Seawater Mg:Ca and Sr:Ca ratios are biogeochemical parameters reflecting the Earth–ocean–atmosphere dynamic exchange of elements. The ratios’ dependence on the environment and organisms' biology facilitates their application in marine sciences. Here, we present a measured single-laboratory dataset, combined with previous data, to test the assumption of limited seawater Mg:Ca and Sr:Ca variability across marine environments globally. High variability was found in open-ocean upwelling and polar regions, shelves/neritic and river-influenced areas, where seawater Mg:Ca and Sr:Ca ratios range from ∼4.40 to 6.40 mmol:mol and ∼6.95 to 9.80 mmol:mol, respectively. Open-ocean seawater Mg:Ca is semiconservative (∼4.90 to 5.30 mol:mol), while Sr:Ca is more variable and nonconservative (∼7.70 to 8.80 mmol:mol); both ratios are nonconservative in coastal seas. Further, the Ca, Mg, and Sr elemental fluxes are connected to large total alkalinity deviations from International Association for the Physical Sciences of the Oceans (IAPSO) standard values. Because there is significant modern seawater Mg:Ca and Sr:Ca ratios variability across marine environments we cannot absolutely assume that fossil archives using taxa-specific proxies reflect true global seawater chemistry but rather taxa- and process-specific ecosystem variations, reflecting regional conditions. This variability could reconcile secular seawater Mg:Ca and Sr:Ca ratio reconstructions using different taxa and techniques by assuming an error of 1 to 1.50 mol:mol, and 1 to 1.90 mmol:mol, respectively. The modern ratios’ variability is similar to the reconstructed rise over 20 Ma (Neogene Period), nurturing the question of seminonconservative behavior of Ca, Mg, and Sr over modern Earth geological history with an overlooked environmental effect.
Programme: 136
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Crouzet N., Mékarnia D., Agabi K., Guillot T., Abe L., Bayliss D., Deeg H., Murgas F., Palle E., Schmider F. (2020). Searching for long period transiting exoplanets with ASTEP South at Dome C, Antarctica. Bachelor's thesis, , .
Abstract: Much of our understanding of gas giant exoplanets come from those transiting in front of bright stars at short orbital separations (P ~ 3 days, a ~ 0.05 au). However, these
Programme: 1066
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Abe L.; Agabi K, Chapellier E.; Guillot T.; Mékarnia D.; Schmider F-X.; De Pra Y.; Buttu, M. (2019). Long term monitoring of β Pictoris with ASTEP from Dome C. Bachelor's thesis, , .
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Fossat E. (2019). What we have learned in more than 10 years of site testing at Concordia. Bachelor's thesis, , .
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Derson, E. (2019). Recherche d'exoplanètes depuis l'Antarctique : Analyse des observations de beta Pictoris. Bachelor's thesis, , .
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