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. (2017). Using a small COTS UAV to quantify moraine dynamics induced by climate shift in Arctic environments (Vol. 38). Bachelor's thesis, , .
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. (2020). Genome-wide analyses reveal drivers of penguin diversification (Vol. 117). Bachelor's thesis, , .
Abstract: Penguins are the only extant family of flightless diving birds. They currently comprise at least 18 species, distributed from polar to tropical environments in the Southern Hemisphere. The history of their diversification and adaptation to these diverse environments remains controversial. We used 22 new genomes from 18 penguin species to reconstruct the order, timing, and location of their diversification, to track changes in their thermal niches through time, and to test for associated adaptation across the genome. Our results indicate that the penguin crown-group originated during the Miocene in New Zealand and Australia, not in Antarctica as previously thought, and that Aptenodytes is the sister group to all other extant penguin species. We show that lineage diversification in penguins was largely driven by changing climatic conditions and by the opening of the Drake Passage and associated intensification of the Antarctic Circumpolar Current (ACC). Penguin species have introgressed throughout much of their evolutionary history, following the direction of the ACC, which might have promoted dispersal and admixture. Changes in thermal niches were accompanied by adaptations in genes that govern thermoregulation and oxygen metabolism. Estimates of ancestral effective population sizes (Ne) confirm that penguins are sensitive to climate shifts, as represented by three different demographic trajectories in deeper time, the most common (in 11 of 18 penguin species) being an increased Ne between 40 and 70 kya, followed by a precipitous decline during the Last Glacial Maximum. The latter effect is most likely a consequence of the overall decline in marine productivity following the last glaciation.
Keywords: ancestral distribution ancestral niche Antarctica genome penguin
Programme: 137,354
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. (2014). Nitrogen isotopes in ice core nitrate linked to anthropogenic atmospheric acidity change
. Proc. Natl. Acad. Sci. U.S.A., 111 (16 ), 5808–5812 .
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Teets N M, Peyton J T, Colinet H, Renault D, Kelley J L, Kawarasaki Y, Lee R E, Denlinger D L, . (2012). Gene expression changes governing extreme dehydration tolerance in an Antarctic insect
. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 109(50), 20744–20749.
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Shaheen Robina, Abauanza Mariana, Jackson Teresa L, McCabe Justin, Savarino Joel, Thiemens Mark H, . (2013). PROCEEDINGS OF THE AMERICAN ACADEMY OF ARTS AND SCIENCES, 110(44), 17662–17667.
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Charrassin, J.B., Hindell, M., Rintoul, S.R., Roquet, F., Sokolov,S., Biuw, M., Costa D., Boehme, L.,Lovell, P., Coleman R., Timmerman, R., Meijers A., Meredith M., Park Y.H., Bailleul F., Tremblay Y., Bost C.A., McMahon C.R., Field I.C., Fedak M.A. , Guinet C. (2008). Southern Ocean frontal structure and sea ice formation rates revealed by elephant seals. Proc. Natl. Acad. Sci. U.S.A., 105, 11634–11639.
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Delmonte B., Petit J.R., Basile Doelsch I., Lipenkov V.Y.a. & Maggi V. (2004). First characterization and dating of East Antarctic bedrock inclusions from subglacial Lake Vostok acccreted ice. Environ. Chem., 1, 1–5.
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Friedt J-M, Retornaz T, Alzuaga S, Baron T, Martin G, Laroche T, Ballandras S, Griselin M, Simonnet J-P, . (2011). Surface acoustic wave devices as passive buried sensors
. Journal of Applied Physics, 109(3), 034905–9.
Keywords: delay lines, electrical conductivity, ground penetrating radar, moisture, permittivity, surface acoustic wave sensors, temperature measurement, wireless sensor networks,
Programme: 304
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. (2012). Variola Virus in a 300-Year-Old Siberian Mummy
. NEW ENGLAND JOURNAL OF MEDICINE, 367(21), 2057–2059.
Abstract: To the Editor: Smallpox, which is caused by the variola virus of the Poxviridae family and the orthopoxvirus genus, is among the most devastating human diseases. It may have originated and spread from Egypt, the Near East, or the Indus Valley 3000 to 4000 years ago, and historical reports indicate epidemics in China as early as the first century A.D. and in Europe during the 6th century. By the mid-18th century, smallpox was a worldwide endemic disease. It was eradicated after vaccination campaigns began more than 200 years ago.1 Variola DNA is about 186 kbp, with genes distributed across conserved . . .
Programme: 1038
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. (2016). Sectorial land snail damage to the lichen Argopsis friesiana could be explained by metabolite profiles. Bachelor's thesis, , .
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