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Author |
Lucien Goulet |
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Master 1 |
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Year |
2021 |
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Pages |
23 |
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Abstract  |
Dans un contexte de changement climatique, il est important de déterminer avec précision l’évolution actuelle et future des processus environnementaux pouvant avoir un impact sur les populations. Ainsi, connaitre l’évolution saisonnière du couvert neigeux s’avère crucial car c’est une composante du cycle de l’eau, jouant un rôle de stockage au printemps. La télédétection spatiale joue un rôle important pour le suivi de l’évolution du manteau neigeux aux échelles continentale et régionale. Des études ont déjà mis en avant certains avantages du radar en bande X (notamment son signal de phase). L’analyse du lien entre la réponse de plusieurs paramètres polarimétriques (K0, K3, K4, K7, CCOH et le CPD) et des données météorologiques (dont l’épaisseur du manteau), a permis de conforter l’utilité de la bande X pour la cible neige. On note un intérêt pour l’intensité totale (K0) qui s’avère être intéressante pour l’étude de la hauteur totale de neige. La différence de phase (CPD), ne s’avère pas concluante pour retracer l’épaisseur totale du manteau neigeux dans notre cas d’application. En revanche, elle offre un bon diagnostic des chutes de neige fraiche et pour la cartographie du métamorphisme de la neige. |
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1126 |
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yes |
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8756 |
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Author |
Morgan Godard |
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Year |
2021 |
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1201 |
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yes |
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Serial |
7727 |
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Year |
2021 |
Publication |
Antarctic Science |
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Volume |
33 |
Issue |
1 |
Pages |
103-115 |
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Keywords |
Antarctic Cold Reversal glacier fluctuations Holocene in situ cosmogenic chlorine-36 dating palaeoclimate sub-Antarctic |
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1048 |
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0954-1020, 1365-2079 |
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yes |
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8186 |
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Year |
2021 |
Publication |
Polar Biology |
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Volume |
44 |
Issue |
7 |
Pages |
1391-1399 |
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1091 |
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ISSN |
1432-2056 |
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yes |
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Serial |
8224 |
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Author |
Alexandra Lavrillier, Semen Gabyshev, Liudmila Egorova, Galina Makarova, Maia Lomovtseva-Adukanova |
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Title |
Analysing Non-Existent and Existing Tourisms in Eastern Siberia among the Evenki, Even, Koryak and Itelmen |
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Journal |
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Year |
2021 |
Publication |
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Abbreviated Journal |
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Issue |
2020/3-2021/1 |
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1127 |
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0755-7809 |
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Approved |
yes |
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Call Number |
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Serial |
6582 |
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Title |
A novel animal-borne miniature echosounder to observe the distribution and migration patterns of intermediate trophic levels in the Southern Ocean |
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Journal |
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Year |
2021 |
Publication |
Journal of Marine Systems |
Abbreviated Journal |
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Volume |
223 |
Issue |
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Pages |
103608 |
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Keywords |
Biologging Diel vertical migration Functional data analysis Marine acoustics Micronekton Sonar tag |
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Programme |
1201 |
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ISSN |
0924-7963 |
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Approved |
yes |
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Call Number |
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Serial |
8260 |
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Title |
Phylogenomic Resolution of Sea Spider Diversification through Integration of Multiple Data Classes |
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Journal |
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Year |
2021 |
Publication |
Molecular Biology and Evolution |
Abbreviated Journal |
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Volume |
38 |
Issue |
2 |
Pages |
686-701 |
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Abstract |
Despite significant advances in invertebrate phylogenomics over the past decade, the higher-level phylogeny of Pycnogonida (sea spiders) remains elusive. Due to the inaccessibility of some small-bodied lineages, few phylogenetic studies have sampled all sea spider families. Previous efforts based on a handful of genes have yielded unstable tree topologies. Here, we inferred the relationships of 89 sea spider species using targeted capture of the mitochondrial genome, 56 conserved exons, 101 ultraconserved elements, and 3 nuclear ribosomal genes. We inferred molecular divergence times by integrating morphological data for fossil species to calibrate 15 nodes in the arthropod tree of life. This integration of data classes resolved the basal topology of sea spiders with high support. The enigmatic family Austrodecidae was resolved as the sister group to the remaining Pycnogonida and the small-bodied family Rhynchothoracidae as the sister group of the robust-bodied family Pycnogonidae. Molecular divergence time estimation recovered a basal divergence of crown group sea spiders in the Ordovician. Comparison of diversification dynamics with other marine invertebrate taxa that originated in the Paleozoic suggests that sea spiders and some crustacean groups exhibit resilience to mass extinction episodes, relative to mollusk and echinoderm lineages. |
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1124 |
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ISSN |
1537-1719 |
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Approved |
yes |
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Serial |
8246 |
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Title |
Contrasting Spatial and Seasonal Trends of Methylmercury Exposure Pathways of Arctic Seabirds: Combination of Large-Scale Tracking and Stable Isotopic Approaches |
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Journal |
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Year |
2021 |
Publication |
Environmental Science & Technology |
Abbreviated Journal |
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Volume |
54 |
Issue |
21 |
Pages |
13619-13629 |
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Programme |
388 |
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ISSN |
0013-936X |
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Approved |
yes |
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Serial |
8023 |
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Author |
G. J. Sutton, C. A. Bost, A. Z. Kouzani, S. D. Adams, K. Mitchell, J. P. Y. Arnould |
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Title |
Fine-scale foraging effort and efficiency of Macaroni penguins is influenced by prey type, patch density and temporal dynamics |
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Journal |
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Year |
2021 |
Publication |
Marine Biology |
Abbreviated Journal |
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Volume |
168 |
Issue |
1 |
Pages |
3 |
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Abstract |
Difficulties quantifying in situ prey patch quality have limited our understanding of how marine predators respond to variation within and between patches, and throughout their foraging range. In the present study, animal-borne video, GPS, accelerometer and dive behaviour data loggers were used to investigate the fine-scale foraging behaviour of Macaroni penguins (Eudyptes chrysolophus) in response to prey type, patch density and temporal variation in diving behaviour. Individuals mainly dived during the day and utilised two strategies, targeting different prey types. Subantarctic krill (Euphausia vallentini) were consumed during deep dives, while small soft-bodied fish were captured on shallow dives or during the ascent phase of deep dives. Despite breeding in large colonies individuals seemed to be solitary foragers and did not engage with conspecifics in coordinated behaviour as seen in other group foraging penguin species. This potentially reflects the high abundance and low manoeuvrability of krill. Video data were used to validate prey capture signals in accelerometer data and a Support Vector Machine learning algorithm was developed to identify prey captures that occurred throughout the entire foraging trip. Prey capture rates indicated that Macaroni penguins continued to forage beyond the optimal give up time. However, bout-scale analysis revealed individuals terminated diving behaviour for reasons other than patch quality. These findings indicate that individuals make complex foraging decisions in relation to their proximate environment over multiple spatio-temporal scales. |
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394 |
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ISSN |
1432-1793 |
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yes |
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Serial |
2037 |
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Title |
North Atlantic winter cyclones starve seabirds |
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Journal |
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Year |
2021 |
Publication |
Current Biology |
Abbreviated Journal |
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Volume |
31 |
Issue |
17 |
Pages |
3964-3971.e3 |
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Keywords |
at-sea distribution cyclones energy expenditure GLS tracking seabird migration seascape ecology |
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330,388 |
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Bachelor's thesis |
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ISSN |
0960-9822 |
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yes |
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Call Number |
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Serial |
8294 |
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