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Title |
Complete distribution of the genus Laevilitorina (Littorinimorpha, Littorinidae) in the Southern Hemisphere: remarks and natural history |
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Journal |
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2022 |
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ZooKeys |
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1127 |
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61-77 |
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Littorinid snails are present in most coastal areas globally, playing a significant role in the ecology of intertidal communities. Laevilitorina is a marine gastropod genus distributed exclusively in the Southern Hemisphere, with 21 species reported from South America, the sub-Antarctic islands, Antarctica, New Zealand, Australia and Tasmania. Here, an updated database of 21 species generated from a combination of sources is presented: 1) new field sampling data; 2) published records; 3) the Global Biodiversity Information Facility (GBIF) and The Atlas of Living Australia (ALA), to provide a comprehensive description of the known geographic distribution of the genus and detailed occurrences for each of the 21 species. The database includes 813 records (occurrences), 53 from field sampling, 174 from the literature, 128 from GBIF, and 458 from ALA. West Antarctica had the highest species richness (8 species), followed by sub-Antarctic islands of New Zealand (4 species) and the south-east shelf of Australia (4 species). The provinces of Magellan, New Zealand South Island, and sub-Antarctic Islands of the Indian Ocean include two species each. This study specifically highlights reports of L. pygmaea and L. venusta, species that have been almost unrecorded since their description. Recent advances in molecular studies of L. caliginosa showed that this species does not correspond to a widely distributed taxon, but to multiple divergent lineages distributed throughout the Southern Ocean. Ongoing molecular and taxonomic studies are necessary for a better understanding of the diversity and biogeography of this genus. |
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1044 |
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1313-2970 |
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yes |
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8565 |
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Ambre Bébin |
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Catalogage de métadonnées et de données des projets de la zone atelier Antarctique et Terres Australes |
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Master 1 |
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2022 |
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136 |
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8037 |
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Dehouck, A.; Lafon, V.; Regniers, O.; Debonnaire, N.; Pillet, V.; Jensen, M.; Baltzer, A.; Garestier, F. |
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The Svalbard Archipelago: when distant erosion monitoring warns of the magnitude of climate impacts in the rest of the overpopulated world |
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Peer-reviewed symposium |
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2022 |
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Living planet symposium 2022, 23-27 may 2022, bonn, germany |
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1223 |
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yes |
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8065 |
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Pillet, V.; Baltzer, A.; Jensen, M.; Besset, M.; Regniers, O.; Lafon, V.; Dehouck, A.; Garestier, F. |
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Title |
Shoreline change assessment in Svalbard Archipelago |
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Peer-reviewed symposium |
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2022 |
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Living planet symposium 2022, 23-27 may 2022, bonn, germany |
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Arctic coastal areas can experience higher erosion rates than temperate regions due to the combined influence of seasonal permafrost melt and extreme temperatures. In addition to these ordinary dynamics, high latitude coastal areas are even more affected by climate-induced changes such as increased weather hazards, rising temperatures or changes in river discharges and sediment supply. The Svalbard region consists of an archipelago of Arctic islands and a rocky and sandy coastline chiseled by numerous fjords connected to glaciers and a complex hydrographic network. Highly sensitive and exposed to the impacts of climate change, this coastal area is a perfect witness to the environmental changes of our century. The Svalbard Archipelago has recently become a key hotspot with an increasing number of studies, mainly focusing on glacier melt, temperature change or soil destabilization. The environmental, geographical, and geomorphological conditions of Svalbard make it extremely difficult to monitor coastal change on a large-scale. However, several studies, including Lim et al. (2020), Jaskolski et al. (2018), and Sisneros-Kidd et al. (2019), have highlighted the strong pressure of climate change, population, and human activities on the Svalbard coastal area. This littoral is fully in line with our approach to apprehend the past, present, and expected consequences of climate change on the environment and populations. In close collaboration with local researcher Maria Jensen from the University of Svalbard (UNIS) and other experts in France (Agnès Baltzer and Franck Garestier), we have explored the potential of the Copernicus Programme satellite images to produce key information on the past and recent dynamics of nearly 300 km of coastline on the archipelago. This is a major challenge, given the complexity of the environment and the meteorological and climatic conditions of the region, which limit the volume of usable spatial data (cloud cover and seasonal ice on the monitored sediments). After a first phase of adapting the algorithms to our developments, we extracted the coastline over 25 years, as well as the evolution of the banks and the extent of the hydrographic network along several major fjords in Svalbard. Particular attention was given to Advenfjorden to improve our effort, due to the greater availability of data to validate our results. We experienced the bathymetric monitoring into the fjord. This information was one of the most complex challenge in terms of methodology and algorithm development regarding the environmental context, but it is also a crucial insight to consider the full climate change impact on coastal sediment dynamics. Finally, we extracted another coastal indicator to focus on changes in the deltaic areas, namely the pioneer vegetation coverage, which reveals the impact of warming on these highly dynamic regions. For the first time, we present our new results issued from these investigations. |
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1223 |
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yes |
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8465 |
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Author |
Denis Mercier, Emilie Portier, Armelle Decaulne, Etienne Cossart |
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Title |
Deep-seated gravitational slope deformation and rock-slope failures deposits in Iceland: inventory, dating and role in landscape evolution |
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Communication |
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Year |
2022 |
Publication |
10th International Conference on Geomorphology, ICG2022-165, Coimbra, 12-16 september 2022 |
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1266 |
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yes |
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8467 |
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Denis Mercier, Armelle Decaulne, Emilie Portier, Etienne Cossart |
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Title |
La datation des glissements de terrain paraglaciaires en Islande |
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2022 |
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7th conference Climat & impacts, 23-25 novembre 2022, Gif-sur-Yvette, France (hal-03867107) |
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Holocene Climatic Changes Landslides Paraglacial adjustment Rock slope failures |
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1266 |
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yes |
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8468 |
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Author |
Antoine Rocaboy |
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Soil microbial biomass and nutrient concentrations under the effect of vegetation cover, biological invasion and habitats of the Kerguelen Islands. |
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Master 1 |
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2022 |
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136 |
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yes |
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8469 |
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Samara Danel, Nancy Rebout, Francesco Bonadonna, Dora Biro |
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Wild skuas can use acoustic cues to locate hidden food |
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2022 |
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Animal Cognition |
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Acoustic cue Cups task Exclusion performance Inferential reasoning by exclusion Shaking |
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354 |
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1435-9456 |
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1435-9456 |
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yes |
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8297 |
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Assessing marine ecosystem complexity: isotopic integration of the trophic structure of seabird communities from the Southern Ocean |
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2022 |
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Marine Ecology Progress Series |
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694 |
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193-208 |
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Antarctica Body size Habitat Penguins Procellariiformes Stable isotopes Trophic position |
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109 |
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0171-8630, 1616-1599 |
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yes |
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8321 |
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Title |
Advancing biological invasion hypothesis testing using functional diversity indices |
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2022 |
Publication |
Science of The Total Environment |
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834 |
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155102 |
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Alien invasive species Community-weighted trait mean Diversity indices Functional traits Invasibility Invasiveness |
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Pioneering investigations on the effects of introduced populations on community structure, ecosystem functioning and services have focused on the effects of invaders on taxonomic diversity. However, taxonomic-based diversity metrics overlook the heterogeneity of species roles within and among communities. As the homogenizing effects of biological invasions on community and ecosystem processes can be subtle, they may require the use of functional diversity indices to be properly evidenced. Starting from the listing of major functional diversity indices, alongside the presentation of their strengths and limitations, we focus on studies pertaining to the effects of invasive species on native communities and recipient ecosystems using functional diversity indices. By doing so, we reveal that functional diversity of the recipient community may strongly vary at the onset of the invasion process, while it stabilizes at intermediate and high levels of invasion. As functional changes occurring during the lag phase of an invasion have been poorly investigated, we show that it is still unknown whether there are consistent changes in functional diversity metrics that could indicate the end of the lag phase. Thus, we recommend providing information on the invasion stage under consideration when computing functional diversity metrics. For the existing literature, it is also surprising that very few studies explored the functional difference between organisms from the recipient communities and invaders of the same trophic levels, or assessed the effects of non-native organism establishment into a non-analogue versus an analogue community. By providing valuable tools for obtaining in-depth diagnostics of community structure and functioning, functional diversity indices can be applied for timely implementation of restoration plans and improved conservation strategies. To conclude, our work provides a first synthetic guide for their use in hypothesis testing in invasion biology. |
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136 |
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0048-9697 |
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yes |
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8323 |
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