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Title |
An estimation of the quantitative impacts of copepod grazing on an under sea-ice spring phytoplankton bloom in western Baffin Bay, Canadian Arctic |
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2021 |
Publication |
Elementa: Science of the Anthropocene |
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Volume |
9 |
Issue |
1 |
Pages |
00092 |
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1164 |
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2325-1026 |
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yes |
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8255 |
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![goto web page (via DOI) doi](img/doi.gif)
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Title |
The early life of king penguins: ontogeny of dive capacity and foraging behaviour in an expert diver |
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2021 |
Publication |
The Journal of Experimental Biology |
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Volume |
224 |
Issue |
12 |
Pages |
jeb242512 |
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Keywords |
Animals Behavior, Animal Bio-logging Diving Feeding Behavior Foraging proficiency Ontogeny Seabirds Spheniscidae Temperature Wiggles |
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137,394 |
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Bachelor's thesis |
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1477-9145 |
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yes |
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8473 |
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![goto web page (via DOI) doi](img/doi.gif)
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Title |
North Atlantic winter cyclones starve seabirds |
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2021 |
Publication |
Current Biology |
Abbreviated Journal |
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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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0960-9822 |
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yes |
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8294 |
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![goto web page (via DOI) doi](img/doi.gif)
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Title |
Meeting Paris agreement objectives will temper seabird winter distribution shifts in the North Atlantic Ocean |
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2021 |
Publication |
Global Change Biology |
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Volume |
27 |
Issue |
7 |
Pages |
1457-1469 |
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330, 388 |
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Bachelor's thesis |
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1365-2486 |
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yes |
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Serial |
7987 |
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Title |
Once upon a time in the far south: Influence of local drivers and functional traits on plant invasion in the harsh sub-Antarctic islands |
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2021 |
Publication |
Journal of Vegetation Science |
Abbreviated Journal |
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Volume |
32 |
Issue |
4 |
Pages |
e13057 |
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Keywords |
alien plants anthropogenic propagule pressure cold environments human disturbances plant invasiveness species distribution models topoclimate |
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Abstract |
Aim Here, we aim to: (a) investigate the local effect of environmental and anthropogenic factors on alien plant invasion in sub-Antarctic islands; and (b) explore whether and how functional traits affect alien species dependence on anthropogenic factors in these environments. Location Possession Island, Crozet archipelago (French sub-Antarctic islands). Methods Single-species distribution models were used to explore the effect of high-resolution topoclimatic and human-related variables on the occurrence of six alien plants colonizing French sub-Antarctic islands. Furthermore, plant responses to human-related variables and the effect of those variables in interaction with plant traits were analysed by means of a multi-species distribution model. This allowed identifying functional features mediating the influence of human activities on the occurrence probability of alien plant species. Results We observed two main invasion patterns: (a) species predicted to occur close to the introduction sites, whose occurrence probability appeared to be strongly affected by anthropogenic factors; and (b) species predicted to occur nearly everywhere on Possession Island, except in areas featuring particularly harsh climatic conditions. Differences in the influence of human-related variables on the occurrence of the alien species were mostly related to their life history, plant height and residence time, with perennial and low-statured species introduced earlier appearing less dependent on human-induced dispersal and disturbance. Conclusions We conclude that both topoclimatic and anthropogenic factors affect plant invasion on sub-Antarctic islands. Specifically, species predicted to occur close to their introduction sites appear much more dependent on human presence and activity, potentially due to the lack of key functional traits allowing them to spread successfully across Possession Island under the harsh sub-Antarctic climate. Yet, particularly severe abiotic conditions are a major constraint which equally limits the occurrence of all alien plants, irrespective of their dependence on anthropogenic factors. |
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136 |
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ISSN |
1654-1103 |
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Approved |
yes |
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Call Number |
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Serial |
8298 |
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Title |
Individual-based model of population dynamics in a sea urchin of the Kerguelen Plateau (Southern Ocean), Abatus cordatus, under changing environmental conditions |
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2021 |
Publication |
Ecological Modelling |
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Volume |
440 |
Issue |
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Pages |
109352 |
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Keywords |
Climate change Dynamic energy budget Ecological modelling Endemic echinoderm Individual-based model Kerguelen Model sensitivity |
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Programme |
1044 |
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0304-3800 |
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yes |
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Serial |
8002 |
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Title |
Echo occurrence in the southern polar ionosphere for the SuperDARN Dome C East and Dome C North radars |
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2021 |
Publication |
Polar Science |
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Volume |
28 |
Issue |
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Pages |
100684 |
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Keywords |
Echo occurrence IRI model Polar cap radars Ray-tracing |
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Abstract |
In this paper, echo occurrence rates for the Dome C East (DCE) and the new Dome C North (DCN) radars are studied. We report the ionospheric and ground scatter echo occurrence rates for selected periods around equinoxes and solstices in the final part of the solar cycle XXIV. The occurrence maps built in Altitude Adjusted Corrected Geomagnetic latitude and Magnetic Local Time coordinates show peculiar patterns highly variable with season. The comparisons of the radar observations with the International Reference Ionosphere model electron density and with ray tracing simulations allow us to explain the major features of observed patterns in terms of electron density variations. The study shows the great potential of the DCE and DCN radar combination to the Super Dual Auroral Radar Network (SuperDARN) convection mapping in terms of monitoring key regions of the high-latitude ionosphere critical for understanding of the magnetospheric dynamics. |
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312 |
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1873-9652 |
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yes |
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Serial |
8020 |
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Title |
Taxonomy based on limited genomic markers may underestimate species diversity of rockhopper penguins and threaten their conservation |
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2021 |
Publication |
Diversity and Distributions |
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Volume |
27 |
Issue |
11 |
Pages |
2277-2296 |
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Keywords |
Eudyptes genomics rockhopper penguins species delimitation |
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Aim Delimiting recently diverged species is challenging. During speciation, genetic differentiation may be distributed unevenly across the genome, as different genomic regions can be subject to different selective pressures and evolutionary histories. Reliance on limited numbers of genetic markers that may be underpowered can make species delimitation even more challenging, potentially resulting in taxonomic inconsistencies. Rockhopper penguins of the genus Eudyptes comprise three broadly recognized taxa: northern (E. moseleyi), southern (E. chrysocome) and eastern rockhopper (E. filholi). Their taxonomic status has been controversial for decades, with researchers disagreeing about whether E. chrysocome and E. filholi are distinct species or conspecific. Our goal is to evaluate genome-wide patterns of divergence to evaluate genetic differentiation and species delimitation in rockhopper penguins, and to assess which mechanisms may underlie previous discordance among nuclear versus mitochondrial analyses. Location Sub-Antarctic and temperate coastal regions of the Southern Hemisphere. Methods We generated reduced-representation genomic libraries using double digest restriction-site associated DNA (ddRAD) sequencing to evaluate genetic differentiation, contemporary migration rates and admixture among colonies of rockhopper penguins. Results The extent of genetic differentiation among the three taxa was consistently higher than population-level genetic differentiation found within these and other penguin species. There was no evidence of admixture among the three taxa, suggesting the absence of ongoing gene flow among them. Species delimitation analyses based on molecular data, along with other lines of evidence, provide strong support for the taxonomic distinction of three species of rockhopper penguins. Main conclusions Our results provide strong support for the existence of three distinct species of rockhopper penguins. The recognition of this taxonomic diversity is crucial for the management and conservation of this widely distributed species group. This study illustrates that widespread dispersive seabird lineages lacking obvious morphological differences may nevertheless have complex evolutionary histories and comprise cryptic species diversity. |
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354 |
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1472-4642 |
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8421 |
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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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2021 |
Publication |
Environmental Science & Technology |
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Volume |
54 |
Issue |
21 |
Pages |
13619-13629 |
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388 |
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0013-936X |
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8023 |
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Author |
Marina Renedo, Zoyne Pedrero, David Amouroux, Yves Cherel, Paco Bustamante |
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Title |
Mercury isotopes of key tissues document mercury metabolic processes in seabirds |
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2021 |
Publication |
Chemosphere |
Abbreviated Journal |
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Volume |
263 |
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Pages |
127777 |
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Keywords |
Demethylation Detoxification Metabolism Methylmercury Moult |
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109 |
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0045-6535 |
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yes |
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8084 |
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