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no |
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Serial |
7850 |
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| Author |
Michael Lockwood, Mathew J. Owens, Carl Haines, Luke Barnard, Christopher John Scott, Aude Chambodut, Kathryn A. McWilliams, Alan W. P. Thomson |
| Title |
Universal Time Variations in Space Weather |
Type |
Journal |
| Year |
2020 |
Publication |
Earth and space science open archive |
Abbreviated Journal |
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| Volume |
12 |
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139 |
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Approved |
yes |
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8464 |
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| Title |
First steps towards a long-term monitoring of storm impact on the coastal morphology of the Reykjanes Peninsula |
Type |
Peer-reviewed symposium |
| Year |
2018 |
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1216 |
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Approved |
yes |
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Serial |
7615 |
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Peer-reviewed symposium |
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2019 |
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688 |
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Approved |
yes |
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Serial |
8757 |
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| Author |
Abadi Fitsum, Barbraud Christophe, Gimenez Olivier |
| Title |
Integrated population modeling reveals the impact of climate on the survival of juvenile emperor penguins |
Type |
Journal |
| Year |
2017 |
Publication |
Global change biology |
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| Volume |
23 |
Issue |
3 |
Pages |
1353-1359 |
| Keywords |
Bayesian climate change emperor penguins integrated population model sea ice concentration southern annular mode survival |
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109 |
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1354-1013 |
ISBN |
1354-1013 |
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Approved |
yes |
| Call Number |
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Serial |
6632 |
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| Title |
Tide?induced microseismicity in the Mertz glacier grounding area, East Antarctica |
Type |
Journal |
| Year |
2013 |
Publication |
Geophysical Research Letters |
Abbreviated Journal |
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| Volume |
40 |
Issue |
20 |
Pages |
5412-5416 |
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688 |
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Edition |
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0094-8276 |
ISBN |
0094-8276 |
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Approved |
yes |
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Serial |
6826 |
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| Title |
Investigating snowpack volumes and icing dynamics in the moraine of an Arctic catchment using UAV photogrammetry |
Type |
Book Chapter |
| Year |
2017 |
Publication |
The Photogrammetric Record |
Abbreviated Journal |
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| Volume |
32 |
Issue |
160 |
Pages |
497-512 |
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1108,1111 |
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Thesis |
Bachelor's thesis |
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0031-868X |
ISBN |
0031-868X |
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Approved |
yes |
| Call Number |
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Serial |
6963 |
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| Author |
Carravieri Alice, Weimerskirch Henri, Bustamante Paco, Cherel Yves |
| Title |
Progressive ontogenetic niche shift over the prolonged immaturity period of wandering albatrosses |
Type |
Journal |
| Year |
2017 |
Publication |
Royal Society Open Science |
Abbreviated Journal |
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| Volume |
4 |
Issue |
10 |
Pages |
171039 |
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| Abstract |
Very little is known about trophic ontogenetic changes over the prolonged immaturity period of long-lived, wide-ranging seabirds. By using blood and feather trophic tracers (?13C and ?15N, and mercury, Hg), we studied age-related changes in feeding ecology during the immature phase of wandering albatrosses Diomedea exulans when they gradually change from a pure oceanic life to visits to their future breeding grounds. Immatures fed in subtropical waters at high trophic positions during moult. Between- and within-individual variations in isotopic niche were very high, irrespective of age, highlighting wide-ranging exploratory behaviours. In summer, while acting as central-place foragers from their future breeding colony, individuals progressively relied on lower trophic level prey and/or southern latitudes as they aged, until occupying a similar isotopic niche to that of adults. Immatures had exceptionally high Hg burdens, with males having lower Hg concentrations than females, suggesting that they foraged more in subantarctic waters. Our findings suggest a progressive ontogenetic niche shift during central-place foraging of this long-lived species. |
| Programme |
109 |
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| ISSN |
2054-5703 |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
7150 |
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Understanding processes at the origin of species flocks with a focus on the marine Antarctic fauna |
Type |
Journal |
| Year |
2017 |
Publication |
Biological Reviews |
Abbreviated Journal |
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| Volume |
93 |
Issue |
1 |
Pages |
481-504 |
| Keywords |
adaptive radiation competition diversification ecological niche endemicity extinction life?history trait phylogeny |
| Abstract |
Species flocks (SFs) fascinate evolutionary biologists who wonder whether such striking diversification can be driven by normal evolutionary processes. Multiple definitions of SFs have hindered the study of their origins. Previous studies identified a monophyletic taxon as a SF if it displays high speciosity in an area in which it is endemic (criterion 1), high ecological diversity among species (criterion 2), and if it dominates the habitat in terms of biomass (criterion 3); we used these criteria in our analyses. Our starting hypothesis is that normal evolutionary processes may provide a sufficient explanation for most SFs. We thus clearly separate each criterion and identify which biological (intrinsic) and environmental (extrinsic) traits are most favourable to their realization. The first part focuses on evolutionary processes. We highlight that some popular putative causes of SFs, such as key innovations or ecological speciation, are neither necessary nor sufficient to fulfill some or all of the three criteria. Initial differentiation mechanisms are diverse and difficult to identify a posteriori because a primary differentiation of one type (genetic, ecological or geographical) often promotes other types of differentiation. Furthermore, the criteria are not independent: positive feedbacks between speciosity and ecological diversity among species are expected whatever the initial cause of differentiation, and ecological diversity should enhance habitat dominance at the clade level. We then identify intrinsic and extrinsic factors that favour each criterion. Low dispersal emerges as a convincing driver of speciosity. Except for a genomic architecture favouring ecological speciation, for which assessment is difficult, high effective population sizes are the single intrinsic factor that directly enhances speciosity, ecological diversity and habitat dominance. No extrinsic factor appeared to enhance all criteria simultaneously but a combination of factors (insularity, fragmentation and environmental stability) may favour the three criteria, although the effect is indirect for habitat dominance. We then apply this analytical framework to Antarctic marine environments by analysing data from 18 speciose clades belonging to echinoderms (five unrelated clades), notothenioid fishes (five clades) and peracarid crustaceans (eight clades). Antarctic shelf environments and history appear favourable to endemicity and speciosity, but not to ecological specialization. Two main patterns are distinguished among taxa. (i) In echinoderms, many brooding, species?rich and endemic clades are reported, but without remarkable ecological diversity or habitat dominance. In these taxa, loss of the larval stage is probably a consequence of past Antarctic environmental factors, and brooding is suggested to be responsible for enhanced allopatric speciation (via dispersal limitation). (ii) In notothenioids and peracarids, many clades fulfill all three SF criteria. This could result from unusual features in fish and crustaceans: chromosome instability and key innovations (antifreeze proteins) in notothenioids, ecological opportunity in peracarids, and a genomic architecture favouring ecological speciation in both groups. Therefore, the data do not support our starting point that normal evolutionary factors or processes drive SFs because in these two groups uncommon intrinsic features or ecological opportunity provide the best explanation. The utility of the three?criterion SF concept is therefore questioned and guidelines are given for future studies. |
| Programme |
1044 |
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| ISSN |
1464-7931 |
ISBN |
1464-7931 |
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Approved |
yes |
| Call Number |
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Serial |
6688 |
| Permanent link to this record |
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| Author |
Collet Julien, Patrick Samantha C., Weimerskirch Henri |
| Title |
Behavioral responses to encounter of fishing boats in wandering albatrosses |
Type |
Journal |
| Year |
2017 |
Publication |
Ecology and evolution |
Abbreviated Journal |
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| Volume |
7 |
Issue |
10 |
Pages |
3335-3347 |
| Keywords |
competition fisheries foraging decisions movement ecology seabirds vessel monitoring system |
| Abstract |
Animals are attracted to human food subsidies worldwide. The behavioral response of individuals to these resources is rarely described in detail, beyond chances of encounters. Seabirds for instance scavenge in large numbers at fishing boats, triggering crucial conservation issues, but how the response to boats varies across encounters is poorly known. Here we examine the behavioral response of wandering albatrosses (Diomedea exulans), equipped with GPS tags, to longline fishing boats operating near their colony for which we had access to vessel monitoring system data. We distinguish between encounters (flying within 30 km of a boat) and attendance behavior (sitting on the sea within 3 km of a boat), and examine factors affecting each. In particular, we test hypotheses that the response to encountered boats should vary with sex and age in this long?lived dimorphic species. Among the 60% trips that encountered boats at least once, 80% of them contained attendance (but attendance followed only 60% of each single encounter). Birds were more attracted and remained attending longer when boats were hauling lines, despite the measures enforced by this fleet to limit food availability during operations. Sex and age of birds had low influence on the response to boats, except the year when fewer boats came fishing in the area, and younger birds were attending further from boats compared to older birds. Net mass gain of birds was similar across sex and not affected by time spent attending boats. Our results indicate albatrosses extensively attend this fishery, with no clear advantages, questioning impacts on foraging time budgets. Factors responsible for sex foraging segregation at larger scale seem not to operate at this fleet near the colony and are not consistent with predictions of optimal foraging theory on potential individual dominance asymmetries. This approach complements studies of large?scale overlap of animals with human subsidies. |
| Programme |
109 |
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2045-7758 |
ISBN |
2045-7758 |
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Approved |
yes |
| Call Number |
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Serial |
6636 |
| Permanent link to this record |
