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Lucie Aulus-Giacosa |
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2021 |
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1041 |
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8354 |
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Author |
Pengcheng Wang, Natacha B. Bernier, Keith R. Thompson, Tsubasa Kodaira |
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Title |
Evaluation of a global total water level model in the presence of radiational S2 tide |
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Journal |
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Year |
2021 |
Publication |
Ocean Modelling |
Abbreviated Journal |
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Volume |
168 |
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Pages |
101893 |
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Keywords |
NEMO Radiational and gravitational tide Storm surge Tidal nudging Total water level |
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688 |
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1463-5003 |
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8356 |
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Author |
Lisa-Marie Mazzolo |
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Master 2 |
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2021 |
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337 |
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8357 |
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Fate of Springtime Atmospheric Reactive Mercury: Concentrations and Deposition at Zeppelin, Svalbard |
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Year |
2021 |
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ACS Earth and Space Chemistry |
Abbreviated Journal |
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Volume |
5 |
Issue |
11 |
Pages |
3234-3246 |
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1028 |
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8361 |
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Author |
Lara D. Shepherd, Colin M. Miskelly, Yves Cherel, Alan J. D. Tennyson |
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Title |
Genetic identification informs on the distributions of vagrant Royal (Eudyptes schlegeli) and Macaroni (Eudyptes chrysolophus) Penguins |
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Journal |
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Year |
2021 |
Publication |
Polar Biology |
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Volume |
44 |
Issue |
12 |
Pages |
2299-2306 |
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Keywords |
Antarctica Eudyptes chrysolophus Eudyptes schlegeli Genetic identification Penguin distribution Predation |
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109 |
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1432-2056 |
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8365 |
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Title |
Global political responsibility for the conservation of albatrosses and large petrels |
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Journal |
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Year |
2021 |
Publication |
Science Advances |
Abbreviated Journal |
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Volume |
7 |
Issue |
10 |
Pages |
eabd7225 |
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Abstract |
Migratory marine species cross political borders and enter the high seas, where the lack of an effective global management framework for biodiversity leaves them vulnerable to threats. Here, we combine 10,108 tracks from 5775 individual birds at 87 sites with data on breeding population sizes to estimate the relative year-round importance of national jurisdictions and high seas areas for 39 species of albatrosses and large petrels. Populations from every country made extensive use of the high seas, indicating the stake each country has in the management of biodiversity in international waters. We quantified the links among national populations of these threatened seabirds and the regional fisheries management organizations (RFMOs) which regulate fishing in the high seas. This work makes explicit the relative responsibilities that each country and RFMO has for the management of shared biodiversity, providing invaluable information for the conservation and management of migratory species in the marine realm. |
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109 |
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8369 |
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Title |
Huff and puff and blow down: invasive plants traits response to strong winds at the Southern Oceanic Islands |
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Journal |
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Year |
2021 |
Publication |
Oikos |
Abbreviated Journal |
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Volume |
130 |
Issue |
11 |
Pages |
1919-1929 |
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Keywords |
environmental filter functional traits hypervolume Iles Kerguelen intraspecific variability mechanical stress |
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Abstract |
Invasions constitute a major driver of biodiversity changes. Insular plant communities are particularly vulnerable to invasions and are relevant models for investigating mechanisms supporting the establishment and spread of introduced plants. Terrestrial flora of sub-Antarctic islands must often thrive in highly windy habitats, thus imposing strong mechanical constraints on individuals. Many alien plants at the sub-Antarctic islands are of tropical or temperate origins, where they were exposed to less stringent wind conditions. As wind likely represents a strong environmental filter for the successful establishment and further geographic spread of plants, they should have developed responses to resist and successfully colonize the Iles Kerguelen. We studied responses to wind of three herbaceous species that are invasive at Iles Kerguelen. We sampled plant individuals at different locations, under windy and sheltered conditions. Traits related to wind avoidance and tolerance and to resource acquisition were measured. We additionally assessed individual performance (biomass) to determine the consequences of trait variations. We focused on trait mean and variance, in particular, through the calculation of hypervolumes. This study emphasized that wind has important effects on plant economics spectrum, including traits involved in mechanical avoidance and light acquisition, with varying strategies, which seem to depend on the biological type of the species (grass versus non-grass). Wind generally reduces individual performance, and this negative effect is not direct but operates through the modification of plant trait values. Furthermore, analyses performed at the hypervolume scale indicate that not only functional trait mean but also its variability account for plant performance. The existence of contrasting growth strategies to cope with local environmental conditions suggests that invaders will be able to occupy different niches, which may ultimately impact local communities. Our results highlight the importance of considering multi-traits responses to meaningfully capture plant adjustments to stress. |
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136 |
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1600-0706 |
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8372 |
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Title |
Human influence on brown trout juvenile body size during metapopulation expansion |
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Journal |
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Year |
2021 |
Publication |
Biology Letters |
Abbreviated Journal |
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Volume |
17 |
Issue |
10 |
Pages |
20210366 |
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Keywords |
brown trout density dependence dispersal invasion biology subantarctic |
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Abstract |
Change in body size can be driven by social (density) and non-social (environmental and spatial variation) factors. In expanding metapopulations, spatial sorting by means of dispersal on the expansion front can further drive the evolution of body size. However, human intervention can dramatically affect these founder effects. Using long-term monitoring of the colonization of the remote Kerguelen islands by brown trout, a facultative anadromous salmonid, we analyse body size variation in 32 naturally founded and 10 human-introduced populations over 57 years. In naturally founded populations, we find that spatial sorting promotes slow positive changes in body size on the expansion front, then that body size decreases as populations get older and local density increases. This pattern is, however, completely different in human-introduced populations, where body size remains constant or even increases as populations get older. The present findings confirm that changes in body size can be affected by metapopulation expansion, but that human influence, even in very remote environments, can fully alter this process. |
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1041 |
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yes |
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8373 |
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Title |
Impact of extreme environmental conditions: Foraging behaviour and trophic ecology responses of a diving seabird, the common diving petrel |
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Journal |
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Year |
2021 |
Publication |
Progress in Oceanography |
Abbreviated Journal |
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Volume |
198 |
Issue |
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Pages |
102676 |
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Keywords |
GPS tracking Habitat modelling Inter-annual variation Marine heatwave Stable isotopes |
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Abstract |
The reproductive success of birds is strongly driven by environmental conditions at different time scales. Thus, during periods of low food availability, breeding success is constrained by the ability of adults to adapt their foraging effort and feeding behaviour to maintain regular incubation shifts and chick provisioning. However, while large seabirds can buffer disruptions in prey availability, the ecophysiological constraints of smaller species may limit their behavioural flexibility. By combining information on at-sea movements, foraging habitat, trophic niche, and breeding success, this study evaluated the effects of intense variability in oceanographic conditions on common diving petrels (Pelecanoides urinatrix) at the northern extent of their range in south-eastern Australia during four consecutive breeding seasons. Unusually low breeding success (6 and 0%) was observed during two years with intense heatwave events, which were associated with higher foraging effort (foraging trips twice longer) and a substantial shift in trophic niche (lower blood ?15N values). These findings suggest that common diving petrels in Bass Strait may have reached a critical threshold above which buffering the effects of environmental variability on their reproductive output is not possible. The clear cascading impacts that marine heatwaves have on zooplankton feeders illustrate the profound bottom-up effect induced by such extreme environmental variations, and suggest strong impact on higher-trophic levels. The wide, circumpolar breeding distribution of the common diving petrel, and its high sensitivity to variations in oceanographic conditions, suggest that this species may be a suitable model to study short-term and long-term behavioural responses to the effects of climate change throughout the Southern Ocean. |
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109 |
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0079-6611 |
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8374 |
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Author |
Zhuang Jiang, Becky Alexander, Joel Savarino, Joseph Erbland, Lei Geng |
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Title |
Impacts of the photo-driven post-depositional processing on snow nitrate and its isotopes at Summit, Greenland: a model-based study |
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Year |
2021 |
Publication |
The Cryosphere |
Abbreviated Journal |
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Volume |
15 |
Issue |
9 |
Pages |
4207-4220 |
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1177 |
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1994-0416 |
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8375 |
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