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Yushiro Fujii, Kenji Satake, Shingo Watada, Tung-Cheng Ho |
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2021 |
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Pure and Applied Geophysics |
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178 |
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12 |
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4777-4796 |
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688 |
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1420-9136 |
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8411 |
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Title |
Regional Characteristics of Atmospheric Sulfate Formation in East Antarctica Imprinted on 17O-Excess Signature |
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2021 |
Publication |
Journal of Geophysical Research: Atmospheres |
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126 |
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6 |
Pages |
e2020JD033583 |
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Keywords |
aerosols Antarctica isotope methanesulfonate sulfate |
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1177 |
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2169-8996 |
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8412 |
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Title |
Transit timings variations in the three-planet system: TOI-270 |
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Year |
2021 |
Publication |
Monthly Notices of the Royal Astronomical Society |
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Volume |
510 |
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4 |
Pages |
5464-5485 |
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1066 |
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0035-8711 |
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8413 |
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Author |
Christophe Barbraud, Karine Delord |
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Title |
Selection against immigrants in wild seabird populations |
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Year |
2021 |
Publication |
Ecology Letters |
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Volume |
24 |
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1 |
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84-93 |
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Dispersal fitness immigrant seabirds sex-biased dispersal |
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109 |
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1461-0248 |
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8418 |
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Sharing wintering grounds does not synchronize annual survival in a high Arctic seabird, the little auk |
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Year |
2021 |
Publication |
Marine Ecology Progress Series |
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676 |
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233-242 |
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Alle alle Capture-mark-recapture Geolocator Migration Non-breeding distribution Synchrony |
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Abstract |
Sharing the same wintering grounds by avian populations breeding in various areas may synchronize fluctuations in vital rates, which could increase the risk of extinction. Here, by combining multi-colony tracking with long-term capture-recapture data, we studied the winter distribution and annual survival of the most numerous Arctic seabird, the little auk Alle alle. We assessed whether little auks from different breeding populations in Svalbard and Franz Josef Land use the same wintering grounds and if this leads to synchronized survival. Our results indicate that birds from the Svalbard colonies shared similar wintering grounds, although differences existed in the proportion of birds from each colony using the different areas. Little auks from Franz Josef Land generally spent the winter in a separate area, but some individuals wintered in the Iceland Sea with Svalbard populations. Survival data from 3 Svalbard colonies collected in 2005-2018 indicated that sharing wintering grounds did not synchronize little auk annual survival rates. However, it is clear that the Iceland Sea is an important wintering area for little auks, and environmental changes in this area could have widespread impacts on many populations. |
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388 |
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0171-8630, 1616-1599 |
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yes |
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8419 |
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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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Year |
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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Author |
Armelle Decaulne, Najat Bhiry, Janie Faucher-Roy, Clara Pelletier Boily |
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Title |
The development of Kangiqsualujjuaq and the threat of snow avalanches in a permafrost degradation context, Nunavik, Canada |
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2021 |
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2020/3-2021/1 |
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Keywords |
active layer Canada demographic growth Nordic village slopes snow avalanches |
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1148 |
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0755-7809 |
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8423 |
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Year-round distribution of Northeast Atlantic seabird populations: applications for population management and marine spatial planning |
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2021 |
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Marine Ecology Progress Series |
Abbreviated Journal |
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676 |
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255-276 |
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Keywords |
Alle alle Fratercula arctica Fulmarus glacialis Marine spatial planning Rissa tridactyla SEATRACK Uria aalge Uria lomvia |
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Abstract |
Tracking data of marine predators are increasingly used in marine spatial management. We developed a spatial data set with estimates of the monthly distribution of 6 pelagic seabird species breeding in the Northeast Atlantic. The data set was based on year-round global location sensor (GLS) tracking data of 2356 adult seabirds from 2006-2019 from a network of seabird colonies, data describing the physical environment and data on seabird population sizes. Tracking and environmental data were combined in monthly species distribution models (SDMs). Cross-validations were used to assess the transferability of models between years and breeding locations. The analyses showed that birds from colonies close to each other (<500 km apart) used the same nonbreeding habitats, while birds from distant colonies (>1000 km) used colony-specific and, in many cases, non-overlapping habitats. Based on these results, the SDM from the nearest model colony was used to predict the distribution of all seabird colonies lying within a species-specific cut-off distance (400-500 km). Uncertainties in the predictions were estimated by cluster bootstrap sampling. The resulting data set consisted of 4692 map layers, each layer predicting the densities of birds from a given species, colony and month across the North Atlantic. This data set represents the annual distribution of 23.5 million adult pelagic seabirds, or 87% of the Northeast Atlantic breeding population of the study species. We show how the data set can be used in population and spatial management applications, including the detection of population-specific nonbreeding habitats and identifying populations influenced by marine protected areas. |
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0171-8630, 1616-1599 |
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8425 |
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Alain Manceau, Romain Brossier, Sarah E. Janssen, Tylor J. Rosera, David P. Krabbenhoft, Yves Cherel, Paco Bustamante, Brett A. Poulin |
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Mercury Isotope Fractionation by Internal Demethylation and Biomineralization Reactions in Seabirds: Implications for Environmental Mercury Science |
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2021 |
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Environmental Science & Technology |
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55 |
Issue |
20 |
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13942-13952 |
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109 |
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0013-936X |
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8427 |
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2021 |
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Geoscientific Model Development |
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14 |
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6 |
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3487-3510 |
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411 |
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1991-959X |
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8428 |
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