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Title |
Effect of extreme sea surface temperature events on the demography of an age-structured albatross population |
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Year |
2017 |
Publication |
Phil. Trans. R. Soc. B |
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Volume |
372 |
Issue |
1723 |
Pages |
20160143 |
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109 |
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ISSN |
0962-8436, 1471-2970 |
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0962-8436, 1471-2970 |
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yes |
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6646 |
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Author |
Young Rebecca C., Welcker Jorg, Barger Christopher P., Hatch Scott A., Merkling Thomas, Kitaiskaia Evgenia V., Haussmann Mark F., Kitaysky Alexander S. |
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Title |
Effects of developmental conditions on growth, stress and telomeres in black?legged kittiwake chicks |
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Journal |
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Year |
2017 |
Publication |
Molecular Ecology |
Abbreviated Journal |
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Volume |
26 |
Issue |
13 |
Pages |
3572-3584 |
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Keywords |
antioxidant corticosterone early?life conditions growth rate telomeres thrifty phenotype |
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1162 |
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ISSN |
0962-1083 |
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0962-1083 |
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yes |
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Serial |
6680 |
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Title |
Evolutionary changes in symbiont community structure in ticks |
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Journal |
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Year |
2017 |
Publication |
Molecular Ecology |
Abbreviated Journal |
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Volume |
26 |
Issue |
11 |
Pages |
2905-2921 |
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Keywords |
co?evolution heritable symbiont communities maternally inherited bacteria symbiosis tick |
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Abstract |
Abstract Ecological specialization to restricted diet niches is driven by obligate, and often maternally inherited, symbionts in many arthropod lineages. These heritable symbionts typically form evolutionarily stable associations with arthropods that can last for millions of years. Ticks were recently found to harbour such an obligate symbiont, Coxiella?LE, that synthesizes B vitamins and cofactors not obtained in sufficient quantities from blood diet. In this study, the examination of 81 tick species shows that some Coxiella?LE symbioses are evolutionarily stable with an ancient acquisition followed by codiversification as observed in ticks belonging to the Rhipicephalus genus. However, many other Coxiella?LE symbioses are characterized by low evolutionary stability with frequent host shifts and extinction events. Further examination revealed the presence of nine other genera of maternally inherited bacteria in ticks. Although these nine symbionts were primarily thought to be facultative, their distribution among tick species rather suggests that at least four may have independently replaced Coxiella?LE and likely represent alternative obligate symbionts. Phylogenetic evidence otherwise indicates that cocladogenesis is globally rare in these symbioses as most originate via horizontal transfer of an existing symbiont between unrelated tick species. As a result, the structure of these symbiont communities is not fixed and stable across the tick phylogeny. Most importantly, the symbiont communities commonly reach high levels of diversity with up to six unrelated maternally inherited bacteria coexisting within host species. We further conjecture that interactions among coexisting symbionts are pivotal drivers of community structure both among and within tick species. |
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333 |
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0962-1083 |
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0962-1083 |
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yes |
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Call Number |
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Serial |
6930 |
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Title |
Persisting Worldwide Seabird-Fishery Competition Despite Seabird Community Decline |
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Journal |
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Year |
2018 |
Publication |
Current Biology |
Abbreviated Journal |
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Volume |
28 |
Issue |
24 |
Pages |
4009-4013.e2 |
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Keywords |
catch reconstructions energetics food competition global fisheries marine management ocean conservation overfishing Sea Around Us seabird community Threatened species |
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Programme |
388 |
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ISSN |
0960-9822 |
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0960-9822 |
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yes |
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Serial |
7647 |
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Author |
K. Collomp, C. Buisson, F. Lasne, R. Collomp |
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Title |
DHEA, physical exercise and doping |
Type |
Journal |
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Year |
2015 |
Publication |
The Journal of Steroid Biochemistry and Molecular Biology |
Abbreviated Journal |
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Volume |
145 |
Issue |
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Pages |
206-212 |
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Keywords |
Acute physical exercise Antidoping analysis Chronic physical exercise Ergogenic effects |
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Abstract |
The dehydroepiandrosterone (DHEA) and dehydroepiandrosterone sulfate (DHEA-S) concentrations during acute and chronic exercise (training) have been investigated only fairly recently. DHEA is generally preferred to DHEA-S for exploring the acute exercise repercussions in laboratory or field tests because of its shorter elimination half-life. Conversely, DHEA-S is preferred to estimate chronic adaptations. Both can be measured noninvasively in saliva, and it is therefore possible to follow these hormone responses in elite athletes during competitive events and in healthy and pathological populations, without imposing additional stress. Indeed, the correlation between saliva and serum concentrations is high for steroid hormones, both at rest and during exercise. In this review, we will first summarize the current knowledge on the DHEA/DHEA-S responses to exercise and examine the potential modulating factors: exercise intensity, gender, age, and training. We will then discuss the ergogenic effects that athletes expect from the exogenous administration of DHEA and the antidoping methods of analysis currently used to detect this abuse. |
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1199 |
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ISSN |
0960-0760 |
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0960-0760 |
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yes |
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Call Number |
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Serial |
7276 |
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Author |
Najat Bhiry, Armelle Decaulne, Myosotis Bourgon-Desroches |
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Type |
Journal |
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Year |
2019 |
Publication |
The Holocene |
Abbreviated Journal |
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Volume |
29 |
Issue |
9 |
Pages |
1459-1467 |
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Programme |
1148 |
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ISSN |
0959-6836 |
ISBN |
0959-6836 |
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Approved |
yes |
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Call Number |
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Serial |
7470 |
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Author |
Andrea Berbellini, Martin Schimmel, Ana MG Ferreira, Andrea Morelli |
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Title |
Constraining S-wave velocity using Rayleigh wave ellipticity from polarization analysis of seismic noise |
Type |
Journal |
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Year |
2018 |
Publication |
Geophysical Journal International |
Abbreviated Journal |
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Volume |
216 |
Issue |
3 |
Pages |
1817-1830 |
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Abstract |
SUMMARY. We develop a new method for measuring ellipticity of Rayleigh waves from ambient noise records by degree-of-polarization (DOP) analysis. The new method, named DOP-E, shows a good capability to retrieve accurate ellipticity curves separated from incoherent noise. In order to validate the method we perform synthetic tests simulating noise in a 1-D earth model. We also perform measurements on real data from Antarctica and Northern Italy. Observed curves show a good fit with measurements from earthquake records and with theoretical ellipticity curves. The inversion of real data measurements for vS structure shows a good agreement with previous models. In particular, the shear-wave structure beneath Concordia station shows no evidence of a significant layer of liquid water at the base of the ice. The new method can be used to measure ellipticity at high frequency and therefore it will allow the imaging of near-surface structure, and possibly of temporal changes in subsurface properties. It promises to be useful to study near-surface processes in a wide range of geological settings, such as volcanoes, fault zones and glaciers. |
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133 |
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Bachelor's thesis |
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ISSN |
0956-540X |
ISBN |
0956-540X |
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Approved |
yes |
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Call Number |
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Serial |
7442 |
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Author |
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Title |
A comparison of approaches for the prediction and inversion of surface wave phase delays |
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Journal |
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Year |
2019 |
Publication |
Geophysical Journal International |
Abbreviated Journal |
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Volume |
217 |
Issue |
3 |
Pages |
1496-1514 |
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Abstract |
SUMMARY. A controlled experiment was performed to investigate the influence of different assumptions made about the propagation of surface waves in surface wav |
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133 |
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ISSN |
0956-540X |
ISBN |
0956-540X |
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Approved |
yes |
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Call Number |
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Serial |
7454 |
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Author |
L. Gualtieri, E. Stutzmann, C. Juretzek, C. Hadziioannou, F. Ardhuin |
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Title |
Global scale analysis and modelling of primary microseisms |
Type |
Journal |
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Year |
2019 |
Publication |
Geophysical Journal International |
Abbreviated Journal |
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Volume |
218 |
Issue |
1 |
Pages |
560-572 |
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Abstract |
Primary microseism is the less studied seismic background vibration of the Earth. Evidence points to sources caused by ocean gravity waves coupling with the seafloor topography. As a result, these sources should be in water depth smaller than the wavelength of ocean waves. Using a state-of-the-art ocean wave model, we carry out the first global-scale seismic modelling of the vertical-component power spectral density of primary microseisms. Our modelling allows us to infer that the observed weak seasonality of primary microseisms in the southern hemisphere corresponds to a weak local seasonality of the sources. Moreover, a systematic analysis of the source regions that mostly contribute to each station reveals that stations on both the east and west sides of the North Atlantic Ocean are sensitive to frequency-dependent source regions. At low frequency (i.e. 0.05 Hz), the dominant source regions can be located thousands of kilometres away from the stations. This observation suggests that identifying the source regions of primary microseisms at the closest coasts can be misleading. |
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Programme |
133 |
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Bachelor's thesis |
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ISSN |
0956-540X |
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0956-540X |
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yes |
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Call Number |
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Serial |
7478 |
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Author |
M. Frietsch, A. M. G. Ferreira, G. J. Funning, J. Weston |
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Title |
Multiple fault modelling combining seismic and geodetic data: the importance of simultaneous subevent inversions |
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Journal |
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Year |
2019 |
Publication |
Geophysical Journal International |
Abbreviated Journal |
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Volume |
218 |
Issue |
2 |
Pages |
958-976 |
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Abstract |
SUMMARY. We present a new inversion method for modelling multiple fault sources combining seismic and geodetic data. The technique takes into account 3-D earth |
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133 |
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ISSN |
0956-540X |
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0956-540X |
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yes |
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Call Number |
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Serial |
7495 |
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