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Author |
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Title |
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Type |
Journal Article |
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Year |
2014 |
Publication |
The Cryosphere |
Abbreviated Journal |
1994-0416 |
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Volume |
8 |
Issue  |
6 |
Pages |
2275-2291 |
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Keywords |
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Abstract |
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Programme |
1053 |
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Publisher |
Copernicus GmbH |
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ISSN |
1994-0416 |
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Approved |
yes |
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Call Number |
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Serial |
5868 |
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Author |
Mauro Domenico Di, Cafarella Lili, Lepidi Stefania, Pietrolungo Manuela, Alfonsi Laura, Chambodut Aude, |
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Title |
Geomagnetic polar observatories: the role of Concordia station at Dome C, Antarctica
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Type |
Journal Article |
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Year |
2015 |
Publication |
Annals of Geophysics |
Abbreviated Journal |
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Volume |
57 |
Issue |
6 |
Pages |
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Keywords |
Antarctica, Azimuth Mark Determination, Concordia, Dome C, GNSS, Geomagnetic observatory, |
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Abstract |
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Programme |
139 |
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Edition |
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ISSN |
1593-5213 |
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Approved |
yes |
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Call Number |
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Serial |
6057 |
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Author |
Chang Sung-Joon, Ferreira Ana M G, Ritsema Jeroen, van Heijst Hendrik J, Woodhouse John H, |
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Title |
Joint inversion for global isotropic and radially anisotropic mantle structure including crustal thickness perturbations
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Type |
Journal Article |
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Year |
2015 |
Publication |
Journal of Geophysical Research: Solid Earth |
Abbreviated Journal |
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Volume |
120 |
Issue |
6 |
Pages |
4278-4300 |
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Keywords |
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Abstract |
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Programme |
133 |
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Edition |
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ISSN |
0148-0227 |
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Approved |
yes |
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Call Number |
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Serial |
6146 |
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Author |
Duputel, Z., J. Vergne, L. Rivera, G. Wittlinger, V. Farra, and G. Hetényi |
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Title |
The 2015 Gorkha earthquake: A large event illuminating the Main Himalayan Thrust fault |
Type |
Journal Article |
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Year |
2016 |
Publication |
Geophysical research letters |
Abbreviated Journal |
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Volume |
43 |
Issue |
6 |
Pages |
2016GL068083 |
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Keywords |
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Abstract |
The 2015 Gorkha earthquake sequence provides an outstanding opportunity to better characterize the geometry of the Main Himalayan Thrust (MHT). To overcome limitations due to unaccounted lateral heterogeneities, we perform Centroid Moment Tensor inversions in a 3-D Earth model for the main shock and largest aftershocks. In parallel, we recompute S-to-P and P-to-S receiver functions from the Hi-CLIMB data set. Inverted centroid locations fall within a low-velocity zone at 10–15 km depth and corresponding to the subhorizontal portion of the MHT that ruptured during the Gorkha earthquake. North of the main shock hypocenter, receiver functions indicate a north dipping feature that likely corresponds to the midcrustal ramp connecting the flat portion to the deep part of the MHT. Our analysis of the main shock indicates that long-period energy emanated updip of high-frequency radiation sources previously inferred. This frequency-dependent rupture process might be explained by different factors such as fault geometry and the presence of fluids. |
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Programme |
133 |
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ISSN |
0094-8276 |
ISBN |
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Approved |
yes |
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Call Number |
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Serial |
6553 |
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Title |
Contrasting effects of climate and population density over time and life stages in a long?lived seabird |
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Journal |
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Year |
2017 |
Publication |
Functional Ecology |
Abbreviated Journal |
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Volume |
31 |
Issue |
6 |
Pages |
1275-1284 |
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Keywords |
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Abstract |
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Programme |
109 |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0269-8463 |
ISBN |
0269-8463 |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
6639 |
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Author |
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Title |
Reproductive effort and oxidative stress: effects of offspring sex and number on the physiological state of a long?lived bird |
Type |
Journal |
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Year |
2017 |
Publication |
Functional Ecology |
Abbreviated Journal |
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Volume |
31 |
Issue |
6 |
Pages |
1201-1209 |
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Keywords |
black?legged kittiwake cost of reproduction hypothesis malondialdehydes oxidative cost of reproduction parental care Rissa tridactyla: superoxide dismutase sex allocation |
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Abstract |
Summary Individuals must trade?off between energetically costly activities to maximize their fitness. However, the underlying physiological mechanism remains elusive. Oxidative stress, the imbalance between reactive oxygen species production and antioxidant and/or repair activities, has been suggested to underlie life?history trade?offs: greater investment in reproduction supposedly generating higher oxidative damage, thus reducing life span. While most studies used natural or experimental variation in offspring number to examine how reproduction affects oxidative stress, none studied the impact of offspring sex, although it could influence physiological costs and fitness, if the sexes differ in terms of energetic cost. Here, we aim at further understanding how reproduction (in terms of offspring sex, experimentally manipulated and number, not manipulated) influences oxidative stress in a wild seabird, where sons are energetically costlier than daughters. We did so by conducting a chick fostering experiment (to disentangle foster and produced sex ratio) and using four oxidative stress markers plus baseline corticosterone. First, the results suggest that individual physiological state before laying modulates upcoming reproductive effort. Individuals with higher pre?laying baseline corticosterone and lower antioxidant activity, estimated by their superoxide dismutase activity, subsequently invested more in reproduction, estimated by the cumulative number of days spent rearing chicks. Hence, it seems that only individuals that could afford to invest heavily in reproduction did so. Then, we examined the effects of reproductive effort on individual physiological state at the end of the breeding season. Higher reproductive effort seemed to imply higher physiological costs. Oxidative stress, estimated by the ratio of oxidized over reduced glutathione, increased with more male?biased foster sex ratio among mothers but not among fathers, whereas baseline corticosterone did so in both sexes. Similarly, lipid oxidative damage to red blood cells increased with increasing cumulative number of days spent rearing chicks. Our study provides the first evidence that brood sex ratio variation can affect oxidative balance, potentially in a sex?specific way, although more studies are needed to understand whether the observed physiological costs could lead to fitness costs. It also highlights the need to consider sex ratio in future studies investigating the role of oxidative stress in life?history trade?offs. A lay summary is available for this article. |
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Programme |
1162 |
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Series Issue |
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Edition |
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ISSN |
0269-8463 |
ISBN |
0269-8463 |
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Conference |
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Notes |
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Approved |
yes |
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Call Number |
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Serial |
6679 |
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Author |
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Title |
Emperors in Hiding: When Ice-Breakers and Satellites Complement Each Other in Antarctic Exploration |
Type |
Journal |
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Year |
2014 |
Publication |
PLOS ONE |
Abbreviated Journal |
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Volume |
9 |
Issue |
6 |
Pages |
e100404 |
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Keywords |
Animal sexual behavior Animal sociality Antarctica Birds Census Glaciers Penguins Tongue |
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Abstract |
Evaluating the demographic trends of marine top predators is critical to understanding the processes involved in the ongoing rapid changes in Antarctic ecosystems. However, the remoteness and logistical complexity of operating in Antarctica, especially during winter, make such an assessment difficult. Satellite imaging is increasingly recognised as a valuable method for remote animal population monitoring, yet its accuracy and reliability are still to be fully evaluated. We report here the first ground visit of an emperor penguin colony first discovered by satellite, but also the discovery of a second one not indicated by satellite survey at that time. Several successive remote surveys in this coastal region of East Antarctica, both before and after sudden local changes, had indeed only identified one colony. These two colonies (with a total of ca. 7,400 breeding pairs) are located near the Mertz Glacier in an area that underwent tremendous habitat change after the glacier tongue broke off in February 2010. Our findings therefore suggest that a satellite survey, although offering a major advance since it allows a global imaging of emperor penguin colonies, may miss certain colony locations when challenged by certain features of polar ecosystems, such as snow cover, evolving ice topology, and rapidly changing habitat. Moreover our survey shows that this large seabird has considerable potential for rapid adaptation to sudden habitat loss, as the colony detected in 2009 may have moved and settled on new breeding grounds. Overall, the ability of emperor penguin colonies to relocate following habitat modification underlines the continued need for a mix of remote sensing and field surveys (aerial photography and ground counts), especially in the less-frequented parts of Antarctica, to gain reliable knowledge about the population demography and dynamics of this flagship species of the Antarctic ecosystem. |
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Programme |
137 |
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ISSN |
1932-6203 |
ISBN |
1932-6203 |
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Approved |
yes |
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Call Number |
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Serial |
6689 |
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Author |
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Title |
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Type |
Journal |
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Year |
2014 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
8 |
Issue |
6 |
Pages |
2275-2291 |
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Keywords |
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Abstract |
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Programme |
1053 |
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ISSN |
1994-0424 |
ISBN |
1994-0424 |
Medium |
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Approved |
yes |
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Call Number |
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Serial |
6792 |
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Author |
Christopher S. Watson, Neil J. White, John A. Church, Matt A. King, Reed J. Burgette, Benoit Legresy |
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Title |
Unabated global mean sea-level rise over the satellite altimeter era |
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Journal |
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Year |
2015 |
Publication |
Nature Climate Change |
Abbreviated Journal |
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Volume |
5 |
Issue |
6 |
Pages |
565-568 |
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Abstract |
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Programme |
688 |
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ISSN |
1758-6798 |
ISBN |
1758-6798 |
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Approved |
yes |
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Call Number |
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Serial |
6842 |
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Title |
A healthy, premoult adult king penguin (Aptenodytes patagonicus) with a markedly twisted beak |
Type |
Journal |
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Year |
2017 |
Publication |
Polar Record |
Abbreviated Journal |
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Volume |
53 |
Issue |
6 |
Pages |
631-632 |
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Abstract |
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Programme |
394 |
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Edition |
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ISSN |
0032-2474, 1475-3057 |
ISBN |
0032-2474, 1475-3057 |
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Approved |
yes |
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Call Number |
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Serial |
6853 |
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| Permanent link to this record |
