696 results on '"Lecomte, Nicolas"'
Search Results
202. Organoid Profiling Identifies Common Responders to Chemotherapy in Pancreatic Cancer
- Author
-
Tiriac, Hervé, primary, Belleau, Pascal, additional, Engle, Dannielle D., additional, Plenker, Dennis, additional, Deschênes, Astrid, additional, Somerville, Tim D. D., additional, Froeling, Fieke E. M., additional, Burkhart, Richard A., additional, Denroche, Robert E., additional, Jang, Gun-Ho, additional, Miyabayashi, Koji, additional, Young, C. Megan, additional, Patel, Hardik, additional, Ma, Michelle, additional, LaComb, Joseph F., additional, Palmaira, Randze Lerie D., additional, Javed, Ammar A., additional, Huynh, Jasmine C., additional, Johnson, Molly, additional, Arora, Kanika, additional, Robine, Nicolas, additional, Shah, Minita, additional, Sanghvi, Rashesh, additional, Goetz, Austin B., additional, Lowder, Cinthya Y., additional, Martello, Laura, additional, Driehuis, Else, additional, LeComte, Nicolas, additional, Askan, Gokce, additional, Iacobuzio-Donahue, Christine A., additional, Clevers, Hans, additional, Wood, Laura D., additional, Hruban, Ralph H., additional, Thompson, Elizabeth, additional, Aguirre, Andrew J., additional, Wolpin, Brian M., additional, Sasson, Aaron, additional, Kim, Joseph, additional, Wu, Maoxin, additional, Bucobo, Juan Carlos, additional, Allen, Peter, additional, Sejpal, Divyesh V., additional, Nealon, William, additional, Sullivan, James D., additional, Winter, Jordan M., additional, Gimotty, Phyllis A., additional, Grem, Jean L., additional, DiMaio, Dominick J., additional, Buscaglia, Jonathan M., additional, Grandgenett, Paul M., additional, Brody, Jonathan R., additional, Hollingsworth, Michael A., additional, O'Kane, Grainne M., additional, Notta, Faiyaz, additional, Kim, Edward, additional, Crawford, James M., additional, Devoe, Craig, additional, Ocean, Allyson, additional, Wolfgang, Christopher L., additional, Yu, Kenneth H., additional, Li, Ellen, additional, Vakoc, Christopher R., additional, Hubert, Benjamin, additional, Fischer, Sandra E., additional, Wilson, Julie M., additional, Moffitt, Richard, additional, Knox, Jennifer, additional, Krasnitz, Alexander, additional, Gallinger, Steven, additional, and Tuveson, David A., additional
- Published
- 2018
- Full Text
- View/download PDF
203. Age composition of winter irruptive Snowy Owls in North America
- Author
-
Santonja, Pablo, primary, Mestre, Irene, additional, Weidensaul, Scott, additional, Brinker, David, additional, Huy, Steve, additional, Smith, Norman, additional, Mcdonald, Tom, additional, Blom, Mike, additional, Zazelenchuck, Dan, additional, Weber, Drew, additional, Gauthier, Gilles, additional, Lecomte, Nicolas, additional, and Therrien, Jean-François, additional
- Published
- 2018
- Full Text
- View/download PDF
204. Early stage litter decomposition across biomes
- Author
-
Djukic, Ika, primary, Kepfer-Rojas, Sebastian, additional, Schmidt, Inger Kappel, additional, Larsen, Klaus Steenberg, additional, Beier, Claus, additional, Berg, Björn, additional, Verheyen, Kris, additional, Caliman, Adriano, additional, Paquette, Alain, additional, Gutiérrez-Girón, Alba, additional, Humber, Alberto, additional, Valdecantos, Alejandro, additional, Petraglia, Alessandro, additional, Alexander, Heather, additional, Augustaitis, Algirdas, additional, Saillard, Amélie, additional, Fernández, Ana Carolina Ruiz, additional, Sousa, Ana I., additional, Lillebø, Ana I., additional, da Rocha Gripp, Anderson, additional, Francez, André-Jean, additional, Fischer, Andrea, additional, Bohner, Andreas, additional, Malyshev, Andrey, additional, Andrić, Andrijana, additional, Smith, Andy, additional, Stanisci, Angela, additional, Seres, Anikó, additional, Schmidt, Anja, additional, Avila, Anna, additional, Probst, Anne, additional, Ouin, Annie, additional, Khuroo, Anzar A., additional, Verstraeten, Arne, additional, Palabral-Aguilera, Arely N., additional, Stefanski, Artur, additional, Gaxiola, Aurora, additional, Muys, Bart, additional, Bosman, Bernard, additional, Ahrends, Bernd, additional, Parker, Bill, additional, Sattler, Birgit, additional, Yang, Bo, additional, Juráni, Bohdan, additional, Erschbamer, Brigitta, additional, Ortiz, Carmen Eugenia Rodriguez, additional, Christiansen, Casper T., additional, Carol Adair, E., additional, Meredieu, Céline, additional, Mony, Cendrine, additional, Nock, Charles A., additional, Chen, Chi-Ling, additional, Wang, Chiao-Ping, additional, Baum, Christel, additional, Rixen, Christian, additional, Delire, Christine, additional, Piscart, Christophe, additional, Andrews, Christopher, additional, Rebmann, Corinna, additional, Branquinho, Cristina, additional, Polyanskaya, Dana, additional, Delgado, David Fuentes, additional, Wundram, Dirk, additional, Radeideh, Diyaa, additional, Ordóñez-Regil, Eduardo, additional, Crawford, Edward, additional, Preda, Elena, additional, Tropina, Elena, additional, Groner, Elli, additional, Lucot, Eric, additional, Hornung, Erzsébet, additional, Gacia, Esperança, additional, Lévesque, Esther, additional, Benedito, Evanilde, additional, Davydov, Evgeny A., additional, Ampoorter, Evy, additional, Bolzan, Fabio Padilha, additional, Varela, Felipe, additional, Kristöfel, Ferdinand, additional, Maestre, Fernando T., additional, Maunoury-Danger, Florence, additional, Hofhansl, Florian, additional, Kitz, Florian, additional, Sutter, Flurin, additional, Cuesta, Francisco, additional, de Almeida Lobo, Francisco, additional, de Souza, Franco Leandro, additional, Berninger, Frank, additional, Zehetner, Franz, additional, Wohlfahrt, Georg, additional, Vourlitis, George, additional, Carreño-Rocabado, Geovana, additional, Arena, Gina, additional, Pinha, Gisele Daiane, additional, González, Grizelle, additional, Canut, Guylaine, additional, Lee, Hanna, additional, Verbeeck, Hans, additional, Auge, Harald, additional, Pauli, Harald, additional, Nacro, Hassan Bismarck, additional, Bahamonde, Héctor A., additional, Feldhaar, Heike, additional, Jäger, Heinke, additional, Serrano, Helena C., additional, Verheyden, Hélène, additional, Bruelheide, Helge, additional, Meesenburg, Henning, additional, Jungkunst, Hermann, additional, Jactel, Hervé, additional, Shibata, Hideaki, additional, Kurokawa, Hiroko, additional, Rosas, Hugo López, additional, Rojas Villalobos, Hugo L., additional, Yesilonis, Ian, additional, Melece, Inara, additional, Van Halder, Inge, additional, Quirós, Inmaculada García, additional, Makelele, Isaac, additional, Senou, Issaka, additional, Fekete, István, additional, Mihal, Ivan, additional, Ostonen, Ivika, additional, Borovská, Jana, additional, Roales, Javier, additional, Shoqeir, Jawad, additional, Lata, Jean-Christophe, additional, Theurillat, Jean-Paul, additional, Probst, Jean-Luc, additional, Zimmerman, Jess, additional, Vijayanathan, Jeyanny, additional, Tang, Jianwu, additional, Thompson, Jill, additional, Doležal, Jiří, additional, Sanchez-Cabeza, Joan-Albert, additional, Merlet, Joël, additional, Henschel, Joh, additional, Neirynck, Johan, additional, Knops, Johannes, additional, Loehr, John, additional, von Oppen, Jonathan, additional, Þorláksdóttir, Jónína Sigríður, additional, Löffler, Jörg, additional, Cardoso-Mohedano, José-Gilberto, additional, Benito-Alonso, José-Luis, additional, Torezan, Jose Marcelo, additional, Morina, Joseph C., additional, Jiménez, Juan J., additional, Quinde, Juan Dario, additional, Alatalo, Juha, additional, Seeber, Julia, additional, Stadler, Jutta, additional, Kriiska, Kaie, additional, Coulibaly, Kalifa, additional, Fukuzawa, Karibu, additional, Szlavecz, Katalin, additional, Gerhátová, Katarína, additional, Lajtha, Kate, additional, Käppeler, Kathrin, additional, Jennings, Katie A., additional, Tielbörger, Katja, additional, Hoshizaki, Kazuhiko, additional, Green, Ken, additional, Yé, Lambiénou, additional, Pazianoto, Laryssa Helena Ribeiro, additional, Dienstbach, Laura, additional, Williams, Laura, additional, Yahdjian, Laura, additional, Brigham, Laurel M., additional, van den Brink, Liesbeth, additional, Rustad, Lindsey, additional, Zhang, Lipeng, additional, Morillas, Lourdes, additional, Xiankai, Lu, additional, Carneiro, Luciana Silva, additional, Di Martino, Luciano, additional, Villar, Luis, additional, Bader, Maaike Y., additional, Morley, Madison, additional, Lebouvier, Marc, additional, Tomaselli, Marcello, additional, Sternberg, Marcelo, additional, Schaub, Marcus, additional, Santos-Reis, Margarida, additional, Glushkova, Maria, additional, Torres, María Guadalupe Almazán, additional, Giroux, Marie-Andrée, additional, de Graaff, Marie-Anne, additional, Pons, Marie-Noëlle, additional, Bauters, Marijn, additional, Mazón, Marina, additional, Frenzel, Mark, additional, Didion, Markus, additional, Wagner, Markus, additional, Hamid, Maroof, additional, Lopes, Marta L., additional, Apple, Martha, additional, Schädler, Martin, additional, Weih, Martin, additional, Gualmini, Matteo, additional, Vadeboncoeur, Matthew A., additional, Bierbaumer, Michael, additional, Danger, Michael, additional, Liddell, Michael, additional, Mirtl, Michael, additional, Scherer-Lorenzen, Michael, additional, Růžek, Michal, additional, Carbognani, Michele, additional, Di Musciano, Michele, additional, Matsushita, Michinari, additional, Zhiyanski, Miglena, additional, Pușcaș, Mihai, additional, Barna, Milan, additional, Ataka, Mioko, additional, Jiangming, Mo, additional, Alsafran, Mohammed, additional, Carnol, Monique, additional, Barsoum, Nadia, additional, Tokuchi, Naoko, additional, Eisenhauer, Nico, additional, Lecomte, Nicolas, additional, Filippova, Nina, additional, Hölzel, Norbert, additional, Ferlian, Olga, additional, Romero, Oscar, additional, Pinto, Osvaldo B., additional, Peri, Pablo, additional, Weber, Paige, additional, Vittoz, Pascal, additional, Turtureanu, Pavel Dan, additional, Fleischer, Peter, additional, Macreadie, Peter, additional, Haase, Peter, additional, Reich, Peter, additional, Petřík, Petr, additional, Choler, Philippe, additional, Marmonier, Pierre, additional, Muriel, Priscilla, additional, Ponette, Quentin, additional, Guariento, Rafael Dettogni, additional, Canessa, Rafaella, additional, Kiese, Ralf, additional, Hewitt, Rebecca, additional, Rønn, Regin, additional, Adrian, Rita, additional, Kanka, Róbert, additional, Weigel, Robert, additional, Gatti, Roberto Cazzolla, additional, Martins, Rodrigo Lemes, additional, Georges, Romain, additional, Meneses, Rosa Isela, additional, Gavilán, Rosario G., additional, Dasgupta, Sabyasachi, additional, Wittlinger, Sally, additional, Puijalon, Sara, additional, Freda, Sarah, additional, Suzuki, Satoshi, additional, Charles, Sean, additional, Gogo, Sébastien, additional, Drollinger, Simon, additional, Mereu, Simone, additional, Wipf, Sonja, additional, Trevathan-Tackett, Stacey, additional, Löfgren, Stefan, additional, Stoll, Stefan, additional, Trogisch, Stefan, additional, Hoeber, Stefanie, additional, Seitz, Steffen, additional, Glatzel, Stephan, additional, Milton, Sue J., additional, Dousset, Sylvie, additional, Mori, Taiki, additional, Sato, Takanori, additional, Ise, Takeshi, additional, Hishi, Takuo, additional, Kenta, Tanaka, additional, Nakaji, Tatsuro, additional, Michelan, Thaisa Sala, additional, Camboulive, Thierry, additional, Mozdzer, Thomas J., additional, Scholten, Thomas, additional, Spiegelberger, Thomas, additional, Zechmeister, Thomas, additional, Kleinebecker, Till, additional, Hiura, Tsutom, additional, Enoki, Tsutomu, additional, Ursu, Tudor-Mihai, additional, di Cella, Umberto Morra, additional, Hamer, Ute, additional, Klaus, Valentin H., additional, Rêgo, Vanessa Mendes, additional, Di Cecco, Valter, additional, Busch, Verena, additional, Fontana, Veronika, additional, Piscová, Veronika, additional, Carbonell, Victoria, additional, Ochoa, Victoria, additional, Bretagnolle, Vincent, additional, Maire, Vincent, additional, Farjalla, Vinicius, additional, Zhou, Wenjun, additional, Luo, Wentao, additional, McDowell, William H., additional, Hu, Yalin, additional, Utsumi, Yasuhiro, additional, Kominami, Yuji, additional, Zaika, Yulia, additional, Rozhkov, Yury, additional, Kotroczó, Zsolt, additional, and Tóth, Zsolt, additional
- Published
- 2018
- Full Text
- View/download PDF
205. Picking the right cache: caching site selection for egg predators in the arctic
- Author
-
Juhasz, Claire-Cécile, primary, Lycke, Ambroise, additional, Careau, Vincent, additional, Gauthier, Gilles, additional, Giroux, Jean-François, additional, and Lecomte, Nicolas, additional
- Published
- 2018
- Full Text
- View/download PDF
206. Applications for deep learning in ecology
- Author
-
Christin, Sylvain, primary, Hervet, Éric, additional, and Lecomte, Nicolas, additional
- Published
- 2018
- Full Text
- View/download PDF
207. Population structure of caribou in an ice-bound archipelago
- Author
-
Jenkins, Deborah. A., primary, Yannic, Glenn, additional, Schaefer, James A., additional, Conolly, James, additional, and Lecomte, Nicolas, additional
- Published
- 2018
- Full Text
- View/download PDF
208. AB098. P072. Investigation of BRCAness in pancreatic cancer using patient-derived organoid models
- Author
-
Lecomte, Nicolas, primary, Al Efishat, Mohammed A., additional, Askan, Gokce, additional, Wang, Rui, additional, Attiyeh, Marc F, additional, Albornoz, Pedro B. C., additional, Egger, Jacklynn V., additional, Zhang, Liguo, additional, Jones, Caitlin, additional, Cruz, Cristian D., additional, Herbst, Brian, additional, Baudin, Vicky, additional, Leach, Tanisha, additional, Melchor, Jerry P., additional, Delsite, Robert, additional, Riaz, Nadeem, additional, Yu, Kenneth H., additional, Socci, Nicholas D., additional, Allen, Peter J., additional, Iacobuzio-Donahue, Christine, additional, O’Reilly, Eileen M., additional, and Leach, Steven D., additional
- Published
- 2018
- Full Text
- View/download PDF
209. Life-history tradeoffs revealed by seasonal declines in reproductive traits of Arctic-breeding shorebirds
- Author
-
Weiser, Emily L., primary, Brown, Stephen C., additional, Lanctot, Richard B., additional, Gates, H. River, additional, Abraham, Kenneth F., additional, Bentzen, Rebecca L., additional, Bêty, Joël, additional, Boldenow, Megan L., additional, Brook, Rodney W., additional, Donnelly, Tyrone F., additional, English, Willow B., additional, Flemming, Scott A., additional, Franks, Samantha E., additional, Gilchrist, H. Grant, additional, Giroux, Marie-Andrée, additional, Johnson, Andrew, additional, Kennedy, Lisa V., additional, Koloski, Laura, additional, Kwon, Eunbi, additional, Lamarre, Jean-François, additional, Lank, David B., additional, Lecomte, Nicolas, additional, Liebezeit, Joseph R., additional, McKinnon, Laura, additional, Nol, Erica, additional, Perz, Johanna, additional, Rausch, Jennie, additional, Robards, Martin, additional, Saalfeld, Sarah T., additional, Senner, Nathan R., additional, Smith, Paul A., additional, Soloviev, Mikhail, additional, Solovyeva, Diana, additional, Ward, David H., additional, Woodard, Paul F., additional, and Sandercock, Brett K., additional
- Published
- 2018
- Full Text
- View/download PDF
210. Effects of environmental conditions on reproductive effort and nest success of Arctic-breeding shorebirds
- Author
-
Weiser, Emily L., primary, Brown, Stephen C., additional, Lanctot, Richard B., additional, Gates, H. River, additional, Abraham, Kenneth F., additional, Bentzen, Rebecca L., additional, Bêty, Joël, additional, Boldenow, Megan L., additional, Brook, Rodney W., additional, Donnelly, Tyrone F., additional, English, Willow B., additional, Flemming, Scott A., additional, Franks, Samantha E., additional, Gilchrist, H. Grant, additional, Giroux, Marie-Andrée, additional, Johnson, Andrew, additional, Kendall, Steve, additional, Kennedy, Lisa V., additional, Koloski, Laura, additional, Kwon, Eunbi, additional, Lamarre, Jean-François, additional, Lank, David B., additional, Latty, Christopher J., additional, Lecomte, Nicolas, additional, Liebezeit, Joseph R., additional, McKinnon, Laura, additional, Nol, Erica, additional, Perz, Johanna, additional, Rausch, Jennie, additional, Robards, Martin, additional, Saalfeld, Sarah T., additional, Senner, Nathan R., additional, Smith, Paul A., additional, Soloviev, Mikhail, additional, Solovyeva, Diana, additional, Ward, David H., additional, Woodard, Paul F., additional, and Sandercock, Brett K., additional
- Published
- 2018
- Full Text
- View/download PDF
211. The great melt will shape unprotected ecosystems.
- Author
-
Lecomte, Nicolas
- Abstract
Glaciers should be prioritized in conservation agendas — and soon. Analysis suggests that glaciers could lose around half their area by the century’s end, with uncertain consequences for postglacial ecosystems.Predicted loss of glacier area and its ecological impact. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
212. Linking genetic and ecological differentiation in an ungulate with a circumpolar distribution
- Author
-
Yannic, Glenn, Ortego, Joaquin, Pellissier, Loïc, Lecomte, Nicolas, Bernatchez, Louis, Côté, Steeve D., Yannic, Glenn, Ortego, Joaquin, Pellissier, Loïc, Lecomte, Nicolas, Bernatchez, Louis, and Côté, Steeve D.
- Abstract
Genetic differentiation among populations may arise from the disruption of gene flow due to local adaptation to distinct environments and/or neutral accumulation of mutations and genetic drift resulted from geographical isolation. Quantifying the role of these processes in determining the genetic structure of natural populations remains challenging. Here, we analyze the relative contribution of isolation-by-resistance (IBR), isolation-by-environment (IBE), genetic drift and historical isolation in allopatry during Pleistocene glacial cycles on shaping patterns of genetic differentiation in caribou/reindeer populations Rangifer tarandus across the entire distribution range of the species. Our study integrates analyses at range-wide and regional scales to partial out the effects of historical and contemporary isolation mechanisms. At the circumpolar scale, our results indicate that genetic differentiation is predominantly explained by IBR and historical isolation. At a regional scale, we found that IBR, IBE and population size significantly explained the spatial distribution of genetic variation among populations belonging to the Euro-Beringian lineage within North America. In contrast, genetic differentiation among populations within the North American lineage was predominantly explained by IBR and population size, but not IBE. We also found discrepancies between genetic and ecotype designation across the Holarctic species distribution range. Overall, these results indicate that multiple isolating mechanisms have played roles in shaping the spatial distribution of genetic variation across the distribution range of a large mammal with high potential for gene flow. Considering multiple spatial scales and simultaneously testing a comprehensive suite of potential isolating mechanisms, our study contributes to understand the ecological and evolutionary processes underlying organism–landscape interactions.
- Published
- 2017
213. Loss of connectivity among island-dwelling Peary caribou following sea ice decline
- Author
-
Jenkins, Deborah A, Méhu, Didier, Lecomte, Nicolas, Schaefer, James A., Yannic, Glenn, Côté, Steeve D., Pellissier, Loïc, Jenkins, Deborah A, Méhu, Didier, Lecomte, Nicolas, Schaefer, James A., Yannic, Glenn, Côté, Steeve D., and Pellissier, Loïc
- Abstract
Global warming threatens to reduce population connectivity for terrestrial wildlife through significant and rapid changes to sea ice. Using genetic fingerprinting, we contrasted extant connectivity in island-dwelling Peary caribou in northern Canada with continental-migratory caribou. We next examined if sea-ice contractions in the last decades modulated population connectivity and explored the possible impact of future climate change on long-term connectivity among island caribou. We found a strong correlation between genetic and geodesic distances for both continental and Peary caribou, even after accounting for the possible effect of sea surface. Sea ice has thus been an effective corridor for Peary caribou, promoting inter-island connectivity and population mixing. Using a time series of remote sensing sea-ice data, we show that landscape resistance in the Canadian Arctic Archipelago has increased by approximately 15% since 1979 and may further increase by 20-77% by 2086 under a high-emission scenario (RCP8.5). Under the persistent increase in greenhouse gas concentrations, reduced connectivity may isolate island-dwelling caribou with potentially significant consequences for population viability.
- Published
- 2017
214. High genetic variability of vagrant polar bears illustrates importance of population connectivity in fragmented sea ice habitats
- Author
-
Kutschera, Verena E, Frosch, Christiane, Janke, Axel, Skirnisson, Karl, Bidon, Tobias, Lecomte, Nicolas, Fain, Steven R, Eiken, Hans Geir, Hagen, Snorre B, Arnasson, Ulfur, Laidre, Kristin L, Nowak, Carsten, and Hailer, Frank
- Subjects
Ekologi ,QL ,polar bear ,Evolutionary Biology ,Ecology ,Arctic sea ice ,inbreeding ,Evolutionsbiologi ,QH301 ,climate change ,genetic variability ,Ursus maritimus ,habitat fragmentation ,dispersal ,QH426 - Abstract
Projections by the Intergovernmental Panel on Climate Change (IPCC) and sea ice forecasts suggest that Arctic sea ice will decline markedly in coming decades. Expected effects on the entire ecosystem include a contraction of suitable polar bear habitat into one or few refugia. Such large-scale habitat decline and fragmentation could lead to reduced genetic diversity. Here we compare genetic variability of four vagrant polar bears that reached Iceland with that in recognized subpopulations from across the range, examining 23 autosomal microsatellites, mitochondrial control region sequences, and Y-chromosomal markers. The vagrants’ genotypes grouped with different genetic clusters and showed similar genetic variability at autosomal microsatellites (expected heterozygosity, allelic richness, individual heterozygosity) as individuals in recognized subpopulations. Each vagrant carried a different mitochondrial haplotype. A likely route for polar bears to reach Iceland is via Fram Strait, a major gateway for the physical exportation of sea ice from the Arctic basin. Vagrant polar bears on Iceland likely originated from more than one recognized subpopulation, and may have been caught in sea ice export during long-distance movements to the East Greenland area. Although their potentially diverse geographic origins might suggest that these vagrants encompass much higher genetic variability than vagrants or dispersers in other regions, the four Icelandic vagrants encompassed similar genetic variability as any four randomly picked individuals from a single subpopulation or from the entire sample. We suggest that this is a consequence of the low overall genetic variability and weak range-wide genetic structuring of polar bears – few dispersers can represent a substantial portion of the species’ gene pool. As predicted by theory and our demographic simulations, continued gene flow will be necessary to counteract loss of genetic variability in increasingly fragmented Arctic habitats. Similar considerations will be important in the management of other taxa that utilize sea ice habitats.
- Published
- 2016
215. Expositions aigues accidentelles aux xénobiotiques en milieu professionnel et mesures de prévention secondaire
- Author
-
Lecomte, Nicolas, Université de Lorraine (UL), Université de Lorraine, and Emmanuel Puskarczyk
- Subjects
Médecine du travail ,Sécurité du travail ,Prévention ,Accidents ,[SDV]Life Sciences [q-bio] ,Non disponible/Not available ,Thèse d'exercice de médecine ,Centres antipoisons - Abstract
La diversité des xénobiotiques à laquelle les travailleurs sont exposés augmente les difficultés d’identification des expositions aiguës accidentelles en milieu professionnel. L’hypothèse est que les médecins du travail n’ont pas connaissance de ces expositions bien qu’ils soient l’un des principaux acteurs de prévention, ce qui peut constituer un frein à la mise en place de mesures de prévention dans les entreprises. À l’aide de données issues des dossiers médicaux du centre antipoison de Nancy et d’un questionnaire complémentaire, nous avons identifié 210 cas d’exposition sur une période de 6 mois en 2015. 40 exposés à risque ont été rappelés au minimum 1 mois après l’exposition pour rechercher une prise en charge par leur service de santé au travail et la mise en place de mesures de prévention dans l’entreprise. Les voies oculaire, respiratoire et cutanée représentaient 73,33 % des expositions. 24 cas présentaient une gravité notable. Les produits d’entretien, les désinfectants et les substances chimiques figuraient parmi les agents les plus fréquemment en cause. Les ouvriers représentaient plus de la moitié des exposés. Les travailleurs en contrats à courte durée semblaient plus à risque d’être exposés. L’industrie manufacturière, la santé humaine et l’action sociale ainsi que l’hébergement et la restauration étaient les secteurs d’activité les plus présents dans notre étude. Lors du rappel à 1 mois des cas suivis, seules 6 expositions avaient abouti à une consultation auprès d’un médecin du travail, dont 2 avaient également déclenché la mise en place de mesures de prévention. 4 autres expositions ont également engendré des mesures de prévention. Si la déclaration d’accident du travail peut constituer un signal d’alerte pour l’entreprise et le médecin du travail, notre étude démontre qu’il est peu efficace. Une information sur la problématique des expositions accidentelles et le développement de collaborations entre les acteurs de prévention sont donc nécessaires.
- Published
- 2016
216. Additional Information on Methods and Results from Loss of connectivity among island-dwelling Peary caribou following sea ice decline
- Author
-
A. Jenkins, Deborah, Lecomte, Nicolas, A. Schaefer, James, Olsen, Steffen M., Swingedouw, Didier, D. Côté, Steeve, Pellissier, Loïc, and Yannic, Glenn
- Abstract
Global warming threatens to reduce population connectivity for terrestrial wildlife through significant and rapid changes to sea ice. Using genetic fingerprinting, we contrast extant connectivity in island-dwelling Peary caribou in northern Canada with continental-migratory caribou. We next examined if sea-ice contractions in the last decades modulated population connectivity and explored the possible impact of future climate change on long-term connectivity among island caribou. We found a strong correlation between genetic and geodesic distances for both continental and Peary caribou, even after accounting for the possible effect of sea surface. Sea ice has thus been an effective corridor for Peary caribou, promoting inter-island connectivity and population mixing. Using a time series of remote sensing sea-ice data, we show that landscape resistance in the Canadian Arctic Archipelago has increased by approximately 15% since 1979 and may further increase by 20–77% by 2086 under a high-emission scenario (RCP8.5). Under the persistent increase in greenhouse gas concentrations, reduced connectivity may isolate island-dwelling caribou with potentially significant consequences for population viability.
- Published
- 2016
- Full Text
- View/download PDF
217. Long-term phenological shifts in migration and breeding-area residency in eastern North American raptors
- Author
-
Therrien, Jean-François, primary, Lecomte, Nicolas, additional, Zgirski, Thomas, additional, Jaffré, Mikaël, additional, Beardsell, Andréanne, additional, Goodrich, Laurie J., additional, Bêty, Joël, additional, Franke, Alastair, additional, Zlonis, Edmund, additional, and Bildstein, Keith L., additional
- Published
- 2017
- Full Text
- View/download PDF
218. Linking genetic and ecological differentiation in an ungulate with a circumpolar distribution
- Author
-
Yannic, Glenn, primary, Ortego, Joaquín, additional, Pellissier, Loïc, additional, Lecomte, Nicolas, additional, Bernatchez, Louis, additional, and Côté, Steeve D, additional
- Published
- 2017
- Full Text
- View/download PDF
219. Migratory connectivity of Semipalmated Sandpipers and implications for conservation
- Author
-
Brown, Stephen, primary, Gratto-Trevor, Cheri, additional, Porter, Ron, additional, Weiser, Emily L., additional, Mizrahi, David, additional, Bentzen, Rebecca, additional, Boldenow, Megan, additional, Clay, Rob, additional, Freeman, Scott, additional, Giroux, Marie-Andrée, additional, Kwon, Eunbi, additional, Lank, David B., additional, Lecomte, Nicolas, additional, Liebezeit, Joe, additional, Loverti, Vanessa, additional, Rausch, Jennie, additional, Sandercock, Brett K., additional, Schulte, Shiloh, additional, Smith, Paul, additional, Taylor, Audrey, additional, Winn, Brad, additional, Yezerinac, Stephen, additional, and Lanctot, Richard B., additional
- Published
- 2017
- Full Text
- View/download PDF
220. Abstract A45: Targeting eIF4A dependent translation as therapeutics in pancreatic cancer
- Author
-
Singh, Kamini, primary, Lecomte, Nicolas, additional, Stark, Stefan, additional, Burčul, Antonija, additional, Olivera, Grbovic-Huezo, additional, Grimont, Adrien, additional, Viale, Agnes, additional, Mohan, Prathibha, additional, Jiang, Man, additional, Destanchia, Elisa, additional, Gokce, Askan, additional, Rätsch, Gunnar, additional, Leach, Steve D., additional, and Wendel, Hans-Guido, additional
- Published
- 2017
- Full Text
- View/download PDF
221. Winter Use of a Highly Diverse Suite of Habitats by Irruptive Snowy Owls
- Author
-
Therrien, Jean-François, primary, Weidensaul, Scott, additional, Brinker, David, additional, Huy, Steve, additional, Miller, Trish, additional, Jacobs, Eugene, additional, Weber, Drew, additional, McDonald, Tom, additional, Lanzone, Mike, additional, Smith, Norman, additional, and Lecomte, Nicolas, additional
- Published
- 2017
- Full Text
- View/download PDF
222. ArcticBirdSounds: An open‐access, multiyear, and detailed annotated dataset of bird songs and calls.
- Author
-
Christin, Sylvain, Chicoine, Christine, O'Neill Sanger, Tommy, Guigueno, Mélanie F., Hansen, Jannik, Lanctot, Richard B., MacNearney, Douglas, Rausch, Jennie, Saalfeld, Sarah T., Schmidt, Niels M., Smith, Paul A., Woodard, Paul F., Hervet, Éric, and Lecomte, Nicolas
- Subjects
SONGBIRDS ,BIRD vocalizations ,BIOTIC communities ,DEEP learning ,BIOACOUSTICS ,BIRDSONGS - Abstract
Tracking biodiversity shifts is central to understanding past, present, and future global changes. Recent advances in bioacoustics and the low cost of high‐quality automatic recorders are revolutionizing studies in biogeography and community and behavioral ecology with a robust assessment of phenology, species occurrence, and individual activity. This large volume of acoustic recordings has recently generated a plethora of datasets that can now be handled automatically, mostly via big data methods such as deep learning. These approaches need high‐quality annotations to classify and detect recorded sounds efficiently. However, very few strongly annotated datasets—that is, with detailed information on start and end time of each vocalization—are openly accessible to the public. Moreover, these datasets mostly cover temperate species and are usually limited to a single year of recordings. Here, we present ArcticBirdSounds, the first open‐access, multisite, and multiyear strongly annotated dataset of arctic bird vocalizations. ArcticBirdSounds offers 20 h of annotated recordings over 2 years (2018, 2019), taken from 15 distinct plots within six locations across the Arctic, from Alaska to Greenland. Recordings cover the arctic vertebrates' breeding period and are evenly spaced during the day; they capture most species breeding there with 12,933 temporal annotations in 49 classes of sounds. While these data can be used for many pressing ecological questions, it is also a unique resource for methodological development to help meet the challenges of fast ecosystem transformations such as those happening in the Arctic. All data, including audio files, annotation files, and companion spreadsheets, are available in an Open Science Framework repository published under a CC BY 4.0 License. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
223. Is pre-breeding prospecting behaviour affected by snow cover in the irruptive snowy owl? A test using state-space modelling and environmental data annotated via Movebank
- Author
-
Therrien, Jean-François, Pinaud, David, Gauthier, Gilles, Lecomte, Nicolas, Bildstein, Keith L, Bety, Joël, Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC), Institut National de la Recherche Agronomique (INRA)-Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS), and Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
- Subjects
Snowy owl ,Research ,Snow ,Env-DATA ,[SDE]Environmental Sciences ,State-space model ,Dispersal ,Movebank ,Pre-breeding movements - Abstract
International audience; Background: Tracking individual animals using satellite telemetry has improved our understanding of animalmovements considerably. Nonetheless, thorough statistical treatment of Argos datasets is often jeopardized by theircoarse temporal resolution. State-space modelling can circumvent some of the inherent limitations of Argos datasets,such as the limited temporal resolution of locations and the lack of information pertaining to the behavioural state ofthe tracked individuals at each location. We coupled state-space modelling with environmental characterisation ofmodelled locations on a 3-year Argos dataset of 9 breeding snowy owls to assess whether searching behaviour forbreeding sites was affected by snow cover and depth in an arctic predator that shows a lack of breeding site fidelity.Results: The state-space modelling approach allowed the discrimination of two behavioural states (searching andmoving) during pre-breeding movements. Tracked snowy owls constantly switched from moving to searching behaviourduring pre-breeding movements from mid-March to early June. Searching events were more likely where snow coverand depth was low. This suggests that snowy owls adapt their searching effort to environmental conditions encounteredalong their path.Conclusions: This modelling technique increases our understanding of movement ecology and behavioural decisions ofindividual animals both locally and globally according to environmental variables.
- Published
- 2015
- Full Text
- View/download PDF
224. Inferring predator–prey interactions in food webs.
- Author
-
Lecomte, Nicolas, Pomeranz, Justin P. F., Harding, Jon S., Thompson, Ross M., and Poisot, Timothée
- Subjects
FOOD chains ,ECOLOGY ,PREDATION ,PHYLOGENY ,BIODIVERSITY - Abstract
Food webs are a powerful way to represent the diversity, structure, and function of ecological systems. However, the accurate description of food webs requires significant effort in time and resources, limiting their widespread use in ecological studies. Newly published methods allow for the inference of feeding interactions using proxy variables. Here, we compare the accuracy of two recently described methods, as well as describe a composite model of the two, for the inference of feeding interactions using a large, well‐described dataset.Both niche and neutral processes are involved in determining whether or not two species will form a feeding link in communities. Three different models for determining niche constraints of feeding interactions are compared, and all three models are extended by incorporating neutral processes, based on relative abundances. The three models compared here infer niche processes through (a) phylogenetic relationships, (b) local species trait distributions (e.g., body size), and (c) a composite of phylogeny and local traits.We show that all three methods perform well at predicting individual species interactions, and that these individual predictions scale up to the network level, resulting in food web structure of inferred networks being similar to their empirical counterparts.Our results indicate that inferring food web structure using phylogenies can be an efficient way of getting summary webs with minimal data, and offers a conservative test of changes in food web structure, particularly when there is low species turnover between sites. Inferences made using traits require more data, but allows for greater understanding of the mechanisms underlying trophic interactions. A composite model of the two methods provides a framework for investigating the importance of how phylogeny, trait distributions, and relative abundances, affect species interactions, and network structure. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
225. The strength of ecological subsidies across ecosystems: a latitudinal gradient of direct and indirect impacts on food webs.
- Author
-
Montagano, Laurent, Leroux, Shawn J., Giroux, Marie‐Andrée, Lecomte, Nicolas, and Liu, Lingli
- Subjects
MARINE ecology ,MACROECOLOGY ,LATITUDE ,META-analysis ,BIODIVERSITY ,PHYTOPLANKTON - Abstract
Material and energy flows among ecosystems can directly and indirectly drive ecosystem functions. Yet, how populations of consumers respond to allochthonous inputs at a macroecological scale is still unclear. Using a meta‐analysis spanning several biomes, we show that the abundance of recipient populations is 36–57% larger with increased allochthonous inputs. The strength of direct effects on the recipients of these inputs as well as the indirect effects on the consumers of these recipients (i.e. ascending indirect effects) are constant across a latitudinal gradient spanning subtropical, arid, temperate, boreal and arctic ecosystems. However, indirect effect on the in situ resources of the input recipient (i.e. descending indirect effects) decreases with latitude. Our results suggest that the influence of allochthonous inputs can vary across large‐scale gradients of ecosystem productivity and may be driven by the types of trophic interactions within recipient food webs. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
226. Age composition of winter irruptive Snowy Owls in North America.
- Author
-
Santonja, Pablo, Mestre, Irene, Therrien, Jean‐François, Gauthier, Gilles, Lecomte, Nicolas, Weidensaul, Scott, Brinker, David, Huy, Steve, Smith, Norman, Mcdonald, Tom, Blom, Mike, Zazelenchuck, Dan, and Weber, Drew
- Subjects
OWLS ,WINTERING of birds ,LEMMINGS ,BIRD food ,BIRD breeding ,BIRD mortality ,AGE determination of animals - Abstract
Patterns of winter irruptions in several owl species apparently follow the 'lack of food' hypothesis, which predicts that individuals leave their breeding grounds in search of food when prey populations do not allow breeding and are too small to ensure survival. Recent analyses, however, suggest an alternative mechanism dubbed the 'breeding success' hypothesis, which predicts that winter irruptions might instead be the result of a very successful breeding season, with a large pool of young birds subsequently migrating south from the breeding grounds. Here we assessed age‐class (juvenile vs. non‐juvenile) composition of winter irruptive Snowy Owls Bubo scandiacus over a 25‐year period (winter 1991–1992 to 2015–2016) between regular (North American Prairies and Great Plains) and irregular wintering areas (northeastern North America) using live‐trapped individuals and high‐resolution images of individual owls. Our results show that the proportion of juveniles (birds less than 1 year of age) varies considerably annually but is positively correlated with irruption intensity in both regions. In irregular wintering areas, it can constitute the majority (up to more than 90%) of winter irruptive Snowy Owls over a large geographical area. These results are consistent with the idea that large winter irruptions at temperate latitudes are not the result of adults massively leaving the Arctic in search of food after a breeding failure but are more likely to be a consequence of good reproductive conditions in the Arctic that create a large pool of winter migrants. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
227. Loss of connectivity among island-dwelling Peary caribou following sea ice decline
- Author
-
Jenkins, Deborah A, Lecomte, Nicolas, Schaefer, James A., Swingedouw, Didier, Côté, Steeve D., Pellissier, Loïc, Yannic, Glenn, Jenkins, Deborah A, Lecomte, Nicolas, Schaefer, James A., Swingedouw, Didier, Côté, Steeve D., Pellissier, Loïc, and Yannic, Glenn
- Abstract
Global warming threatens to reduce population connectivity for terrestrial wildlife through significant and rapid changes to sea ice. Using genetic fingerprinting, we contrasted extant connectivity in island-dwelling Peary caribou in northern Canada with continental-migratory caribou. We next examined if sea-ice contractions in the last decades modulated population connectivity and explored the possible impact of future climate change on long-term connectivity among island caribou. We found a strong correlation between genetic and geodesic distances for both continental and Peary caribou, even after accounting for the possible effect of sea surface. Sea ice has thus been an effective corridor for Peary caribou, promoting inter-island connectivity and population mixing. Using a time series of remote sensing sea-ice data, we show that landscape resistance in the Canadian Arctic Archipelago has increased by approximately 15% since 1979 and may further increase by 20-77% by 2086 under a high-emission scenario (RCP8.5). Under the persistent increase in greenhouse gas concentrations, reduced connectivity may isolate island-dwelling caribou with potentially significant consequences for population viability.
- Published
- 2016
228. Effects of geolocators on hatching success, return rates, breeding movements, and change in body mass in 16 species of Arctic-breeding shorebirds
- Author
-
Weiser, Emily L, Lanctot, Richard B., Brown, Stephen C, Alves, José A., Battley, Phil, Bentzen, Rebecca, Bêty, Joël, Bishop, Mary Anne, Boldenow, Megan, Bollache, Loïc, Casler, Bruce, Christie, Maureen, T. Coleman, Jonathan, Conklin, Jesse, B. English, Willow, Gates, H. River, Gilg, Olivier, Giroux, Marie-Andrée, Gosbell, Ken, Hassell, Chris J., Helmericks, Jim, Johnson, Andrew, Katrínardóttir, Borgný, Koivula, Kari, Kwon, Eunbi, Lamarre, Jean-Francois, Lang, Johannes, Lank, David B., Lecomte, Nicolas, Liebezeit, Joe, Loverti, Vanessa, McKinnon, Laura, Minton, Clive D. T., Mizrahi, David, Nol, Erica, Pakanen, Veli-Matti, Perz, Johanna, Porter, Ron, Rausch, Jennie, Reneerkens, Jeroen, Rönkä, Nelli, Saalfeld, Sarah, Senner, Nathan, Sittler, Benoit, Smith, Paul A., Sowl, Kristine, Taylor, Audrey, Ward, David H., Yezerinac, Stephen, Sandercock, Brett K., Weiser, Emily L, Lanctot, Richard B., Brown, Stephen C, Alves, José A., Battley, Phil, Bentzen, Rebecca, Bêty, Joël, Bishop, Mary Anne, Boldenow, Megan, Bollache, Loïc, Casler, Bruce, Christie, Maureen, T. Coleman, Jonathan, Conklin, Jesse, B. English, Willow, Gates, H. River, Gilg, Olivier, Giroux, Marie-Andrée, Gosbell, Ken, Hassell, Chris J., Helmericks, Jim, Johnson, Andrew, Katrínardóttir, Borgný, Koivula, Kari, Kwon, Eunbi, Lamarre, Jean-Francois, Lang, Johannes, Lank, David B., Lecomte, Nicolas, Liebezeit, Joe, Loverti, Vanessa, McKinnon, Laura, Minton, Clive D. T., Mizrahi, David, Nol, Erica, Pakanen, Veli-Matti, Perz, Johanna, Porter, Ron, Rausch, Jennie, Reneerkens, Jeroen, Rönkä, Nelli, Saalfeld, Sarah, Senner, Nathan, Sittler, Benoit, Smith, Paul A., Sowl, Kristine, Taylor, Audrey, Ward, David H., Yezerinac, Stephen, and Sandercock, Brett K.
- Abstract
Background: Geolocators are useful for tracking movements of long-distance migrants, but potential negative effects on birds have not been well studied. We tested for effects of geolocators (0.8–2.0 g total, representing 0.1–3.9 % of mean body mass) on 16 species of migratory shorebirds, including five species with 2–4 subspecies each for a total of 23 study taxa. Study species spanned a range of body sizes (26–1091 g) and eight genera, and were tagged at 23 breeding and eight nonbreeding sites. We compared breeding performance and return rates of birds with geolocators to control groups while controlling for potential confounding variables. Results: We detected negative effects of tags for three small-bodied species. Geolocators reduced annual return rates for two of 23 taxa: by 63 % for semipalmated sandpipers and by 43 % for the arcticola subspecies of dunlin. High resighting effort for geolocator birds could have masked additional negative effects. Geolocators were more likely to negatively affect return rates if the total mass of geolocators and color markers was 2.5–5.8 % of body mass than if tags were 0.3–2.3 % of body mass. Carrying a geolocator reduced nest success by 42 % for semipalmated sandpipers and tripled the probability of partial clutch failure in semipalmated and western sandpipers. Geolocators mounted perpendicular to the leg on a flag had stronger negative effects on nest success than geolocators mounted parallel to the leg on a band. However, parallel-band geolocators were more likely to reduce return rates and cause injuries to the leg. No effects of geolocators were found on breeding movements or changes in body mass. Among-site variation in geolocator effect size was high, suggesting that local factors were important. Conclusions: Negative effects of geolocators occurred only for three of the smallest species in our dataset, but were substantial when present. Future studies could mitigate impacts of tags by reducing protr
- Published
- 2016
229. Unexpected diversity in socially synchronized rhythms of shorebirds
- Author
-
Max Planck Society, Bulla, Martin, Valcu, Mihai, Dokter, Adriaan M., Dondua, Alexei G., Kosztolányi, András, Rutten, Anne L., Helm, Barbara, Sandercock, Brett K., Casler, Bruce, Ens, Bruno J., Spiegel, Caleb S., Hassell, Chris J., Küpper, Clemens, Minton, Clive, Burgas, Daniel, Lank, David, Payer, David, Loktionov, Egor Y., Nol, Erica, Kwon, Eunbi, Smith, Fletcher, Gates, H. River, Vitnerová, Hana, Prüter, Hanna, Johnson, James A., St Clair, James J. H., Lamarre, Jean-François, Rausch, Jennie, Reneerkens, Jeroen, Conklin, Jesse R., Burger, Joanna, Liebezeit, Joe, Bêty, Joël, Coleman, Jonathan T., Figuerola, Jordi, Hooijmeijer, Jos C. E. W., Alves, José A., Smith, Joseph A. M., Weidinger, Karel, Koivula, Kari, Gosbell, Ken, Exo, Klaus-Michael, Niles, Larry, Koloski, Laura, mcKinnon, Laura, Praus, Libor, Klaassen, Marcel, Giroux, Marie-Andrée, Sládeček, Martin, Boldenow, Megan L., Goldstein, Michael I., Šálek, Miroslav, Senner, Nathan, Rönkä, Nelli, Lecomte, Nicolas, Gilg, Olivier, Vincze, Orsolya, Johnson, Oscar W., Smith, Paul A., Woodard, Paul F., Tomkovich, Pavel S., Battley, Phil F., Bentzen, Rebecca, Lanctot, Richard, Porter, Ron, Saalfeld, Sarah T., Freeman, Scott, Brown, Stephen C., Yezerinac, Stephen, Székely, Tamás, Montalvo, Tomás, Piersma, Theunis, Loverti, Vanessa, Pakanen, Veli-Matti, Tijsen, Wim, Kempenaers, Bart, Max Planck Society, Bulla, Martin, Valcu, Mihai, Dokter, Adriaan M., Dondua, Alexei G., Kosztolányi, András, Rutten, Anne L., Helm, Barbara, Sandercock, Brett K., Casler, Bruce, Ens, Bruno J., Spiegel, Caleb S., Hassell, Chris J., Küpper, Clemens, Minton, Clive, Burgas, Daniel, Lank, David, Payer, David, Loktionov, Egor Y., Nol, Erica, Kwon, Eunbi, Smith, Fletcher, Gates, H. River, Vitnerová, Hana, Prüter, Hanna, Johnson, James A., St Clair, James J. H., Lamarre, Jean-François, Rausch, Jennie, Reneerkens, Jeroen, Conklin, Jesse R., Burger, Joanna, Liebezeit, Joe, Bêty, Joël, Coleman, Jonathan T., Figuerola, Jordi, Hooijmeijer, Jos C. E. W., Alves, José A., Smith, Joseph A. M., Weidinger, Karel, Koivula, Kari, Gosbell, Ken, Exo, Klaus-Michael, Niles, Larry, Koloski, Laura, mcKinnon, Laura, Praus, Libor, Klaassen, Marcel, Giroux, Marie-Andrée, Sládeček, Martin, Boldenow, Megan L., Goldstein, Michael I., Šálek, Miroslav, Senner, Nathan, Rönkä, Nelli, Lecomte, Nicolas, Gilg, Olivier, Vincze, Orsolya, Johnson, Oscar W., Smith, Paul A., Woodard, Paul F., Tomkovich, Pavel S., Battley, Phil F., Bentzen, Rebecca, Lanctot, Richard, Porter, Ron, Saalfeld, Sarah T., Freeman, Scott, Brown, Stephen C., Yezerinac, Stephen, Székely, Tamás, Montalvo, Tomás, Piersma, Theunis, Loverti, Vanessa, Pakanen, Veli-Matti, Tijsen, Wim, and Kempenaers, Bart
- Abstract
The behavioural rhythms of organisms are thought to be under strong selection, influenced by the rhythmicity of the environment1,2,3,4. Such behavioural rhythms are well studied in isolated individuals under laboratory conditions1,5, but free-living individuals have to temporally synchronize their activities with those of others, including potential mates, competitors, prey and predators6,7,8,9,10. Individuals can temporally segregate their daily activities (for example, prey avoiding predators, subordinates avoiding dominants) or synchronize their activities (for example, group foraging, communal defence, pairs reproducing or caring for offspring)6,7,8,9,11. The behavioural rhythms that emerge from such social synchronization and the underlying evolutionary and ecological drivers that shape them remain poorly understood5,6,7,9. Here we investigate these rhythms in the context of biparental care, a particularly sensitive phase of social synchronization12 where pair members potentially compromise their individual rhythms. Using data from 729 nests of 91 populations of 32 biparentally incubating shorebird species, where parents synchronize to achieve continuous coverage of developing eggs, we report remarkable within- and between-species diversity in incubation rhythms. Between species, the median length of one parent’s incubation bout varied from 1–19 h, whereas period length—the time in which a parent’s probability to incubate cycles once between its highest and lowest value—varied from 6–43 h. The length of incubation bouts was unrelated to variables reflecting energetic demands, but species relying on crypsis (the ability to avoid detection by other animals) had longer incubation bouts than those that are readily visible or who actively protect their nest against predators. Rhythms entrainable to the 24-h light–dark cycle were less prevalent at high latitudes and absent in 18 species. Our results indicate that even under similar environmental conditions and despit
- Published
- 2016
230. Loss of connectivity among island-dwelling Peary caribou following sea ice decline
- Author
-
Jenkins, Deborah A., primary, Lecomte, Nicolas, additional, Schaefer, James A., additional, Olsen, Steffen M., additional, Swingedouw, Didier, additional, Côté, Steeve D., additional, Pellissier, Loïc, additional, and Yannic, Glenn, additional
- Published
- 2016
- Full Text
- View/download PDF
231. Is it safe to nest near conspicuous neighbours? Spatial patterns in predation risk associated with the density of American Golden-Plover nests
- Author
-
Giroux, Marie-Andrée, primary, Trottier-Paquet, Myriam, additional, Bêty, Joël, additional, Lamarre, Vincent, additional, and Lecomte, Nicolas, additional
- Published
- 2016
- Full Text
- View/download PDF
232. Sexing a sex-role-reversed species based on plumage: potential challenges in the red phalarope
- Author
-
Giroux, Marie-Andrée, primary, Ditlecadet, Delphine, additional, Martin, Luc J., additional, Lanctot, Richard B., additional, and Lecomte, Nicolas, additional
- Published
- 2016
- Full Text
- View/download PDF
233. Effects of geolocators on hatching success, return rates, breeding movements, and change in body mass in 16 species of Arctic-breeding shorebirds
- Author
-
Weiser, Emily L., primary, Lanctot, Richard B., additional, Brown, Stephen C., additional, Alves, José A., additional, Battley, Phil F., additional, Bentzen, Rebecca, additional, Bêty, Joël, additional, Bishop, Mary Anne, additional, Boldenow, Megan, additional, Bollache, Loïc, additional, Casler, Bruce, additional, Christie, Maureen, additional, Coleman, Jonathan T., additional, Conklin, Jesse R., additional, English, Willow B., additional, Gates, H. River, additional, Gilg, Olivier, additional, Giroux, Marie-Andrée, additional, Gosbell, Ken, additional, Hassell, Chris, additional, Helmericks, Jim, additional, Johnson, Andrew, additional, Katrínardóttir, Borgný, additional, Koivula, Kari, additional, Kwon, Eunbi, additional, Lamarre, Jean-Francois, additional, Lang, Johannes, additional, Lank, David B., additional, Lecomte, Nicolas, additional, Liebezeit, Joe, additional, Loverti, Vanessa, additional, McKinnon, Laura, additional, Minton, Clive, additional, Mizrahi, David, additional, Nol, Erica, additional, Pakanen, Veli-Matti, additional, Perz, Johanna, additional, Porter, Ron, additional, Rausch, Jennie, additional, Reneerkens, Jeroen, additional, Rönkä, Nelli, additional, Saalfeld, Sarah, additional, Senner, Nathan, additional, Sittler, Benoît, additional, Smith, Paul A., additional, Sowl, Kristine, additional, Taylor, Audrey, additional, Ward, David H., additional, Yezerinac, Stephen, additional, and Sandercock, Brett K., additional
- Published
- 2016
- Full Text
- View/download PDF
234. Is it safe to nest near bold neighbours? Spatial patterns in predation risk associated with the density of American Golden-Plover nest
- Author
-
Giroux, Marie-Andrée, primary, Trottier-Paquet, Myriam, additional, Bêty, Joël, additional, Lamarre, Vincent, additional, and Lecomte, Nicolas, additional
- Published
- 2016
- Full Text
- View/download PDF
235. Sa1531a GSK3β Inhibition Leads to Partial Redifferentiation of Ductal Neoplasia Towards a More Acinar Phenotype in Mouse Pancreatic Tumor Organoids
- Author
-
Zhang, Shu, primary, Lecomte, Nicolas, additional, Lafaro, Kelly, additional, Zou, Xiaoping, additional, and Leach, Steven, additional
- Published
- 2016
- Full Text
- View/download PDF
236. Sexing a gender-role-reversed species based on plumage: potential challenges in the red phalarope
- Author
-
Giroux, Marie-Andrée, primary, Ditlecadet, Delphine, additional, Martin, Luc J, additional, Lanctot, Richard B., additional, and Lecomte, Nicolas, additional
- Published
- 2016
- Full Text
- View/download PDF
237. Foraging: Behaviour and Ecology D. W. Stephens J. S. Brown R. C. Ydenberg
- Author
-
Lecomte, Nicolas
- Published
- 2008
238. Infinite Nature R. B. Hull
- Author
-
Lecomte, Nicolas
- Published
- 2007
239. Tundra food webs
- Author
-
Legagneux, Pierre, Lecomte, Nicolas, Gauthier, Gilles, Julien, Jean-Rémi, Krebs, Charles J., Morris, Douglas W., Schmidt, Niels Martin, Yoccoz, Nigel G., Gauthier, Gilles, and Berteaux, Dominique
- Published
- 2011
240. Testing methods for using high-resolution satellite imagery to monitor polar bear abundance and distribution
- Author
-
LaRue, Michelle A., primary, Stapleton, Seth, additional, Porter, Claire, additional, Atkinson, Stephen, additional, Atwood, Todd, additional, Dyck, Markus, additional, and Lecomte, Nicolas, additional
- Published
- 2015
- Full Text
- View/download PDF
241. New avian breeding records for Igloolik Island, Nunavut
- Author
-
Lecomte, Nicolas, primary and Giroux, Marie-Andrée, additional
- Published
- 2015
- Full Text
- View/download PDF
242. Ecological Implications of Changing the Composition of Boreal Mixedwood Forests
- Author
-
Spence, John, Lieffers, Victor, Quideau, Sylvie, Brais, Suzanne, Chen, Han, Comeau, Phil, Bergeron, Yves, Lecomte, Nicolas, Macdonald, Ellen, Drapeau, Pierre, and Work, Tim
- Subjects
Taigas ,Forest management ,Sustainable forestry ,Forest biodiversity ,Forests and forestry ,Taiga ecology - Published
- 2010
243. 133 Sensory Denervation Decreases PanIN Progression in a Mouse Model of Pancreatic Cancer
- Author
-
Robert C. Kurtz, Joseph Saglimbeni, Kelly J. Lafaro, Lecomte Nicolas, Pankaj J. Pasricha, Gordon J. Hildick-Smith, Smrita Sinha, Olivera Grbovic-Huezo, Maren Ketcham, Jerry P. Melchor, Steven T. Leach, and Ya-Yuan Fu
- Subjects
Tumor microenvironment ,medicine.medical_specialty ,endocrine system diseases ,Hepatology ,General surgery ,Gastroenterology ,Perineural invasion ,Pancreatic Intraepithelial Neoplasia ,Substance P ,Biology ,medicine.disease_cause ,medicine.disease ,Epithelium ,chemistry.chemical_compound ,medicine.anatomical_structure ,chemistry ,Tumor progression ,Pancreatic cancer ,medicine ,Cancer research ,Carcinogenesis - Abstract
BACKGROUND: Reciprocal molecular signaling between pancreatic ductal adenocarcinoma (PDAC) and nerves may promote perineural invasion (PNI) and tumor growth. The identity and function of sensory neuropeptides in the tumor microenvironment are unknown. We hypothesized that sensory neurons play an important role in tumor progression and that substance P (SP) is a candidate neuropeptide for mediating this effect. AIMS:1) to characterize SP receptor (NK1R) expression in PanIN epithelium 2) to determine NK1R expression in human PDAC cell lines 3) to study effects of sensory denervation on pancreatic intraepithelial neoplasia (PanIN) initiation and progression in the KPC ( Pdx1-Cre; LSL-Kras; LSLTrp53) mouse model. METHODS: KPC mice were injected with the sensory neurotoxin resiniferatoxin (RTX; Sigma) or control solution on postnatal day 7. Pancreata from 8and 12-week-old mice were fixed and subject to HE Santa Cruz). Images were taken with a Nikon Camera or Zeiss LSM 510 Meta microscope. PanINs were graded as early (grade 1) or advanced (grades 2 and 3). PanIN burden was calculated by the percentage of total surface area occupied in 5 random views per HE p = 0.02). All analyzed human PDAC cell lines expressed the NK1R. In vivo studies revealed axons in close proximity to PanIN epithelium (Fig.1). RTX-treated mice had a 50% decrease in pancreatic sensory axonal density when compared to control mice at 8 and 12 weeks (p < 0.05). RTX-treated mice had a significant reduction in advanced PanINs compared to control mice at both 8 weeks (0.05% versus 0.9%; p < 0.05) and 12 weeks (0.3% versus 8%; p < 0.05). CONCLUSIONS: The NK1R is expressed in distinct cells within the PanIN epithelium and the percentage of NK1R+ cells increases with PanIN grade. Human PDAC cell lines express the NK1R. Sensory denervation is associated with a significant reduction in progression from early to advanced PanIN in the KPC model. Sensory nerves are likely an important part of the PanIN microenvironment and may affect tumorigenesis via the NK1R. This study provides new insight into the pathogenesis and potential therapeutic targets in PDAC.
- Published
- 2015
- Full Text
- View/download PDF
244. Unmanned aircraft system advances health mapping of fragile polar vegetation.
- Author
-
Malenovský, Zbyněk, Lucieer, Arko, King, Diana H., Turnbull, Johanna D., Robinson, Sharon A., and Lecomte, Nicolas
- Subjects
MOSSES ,PHYTOGEOGRAPHY ,VEGETATION mapping ,CHLOROPHYLL ,DRONE aircraft - Abstract
Plants like mosses can be sensitive stress markers of subtle shifts in Arctic and Antarctic environmental conditions, including climate change. Traditional ground-based monitoring of fragile polar vegetation is, however, invasive, labour intensive and physically demanding. High-resolution multispectral satellite observations are an alternative, but even their recent highest achievable spatial resolution is still inadequate, resulting in a significant underestimation of plant health due to spectral mixing and associated reflectance impurities., To resolve these obstacles, we have developed a new method that uses low-altitude unmanned aircraft system (UAS) hyperspectral images of sub-decimeter spatial resolution. Machine-learning support vector regressions (SVR) were employed to infer Antarctic moss vigour from quantitative remote sensing maps of plant canopy chlorophyll content and leaf density. The same maps were derived for comparison purposes from the WorldView-2 high spatial resolution (2.2 m) multispectral satellite data., We found SVR algorithms to be highly efficient in estimating plant health indicators with acceptable root mean square errors ( RMSE). The systematic RMSEs for chlorophyll content and leaf density were 3.5-6.0 and 1.3-2.0 times smaller, respectively, than the unsystematic errors. However, application of correctly trained SVR machines on space-borne multispectral images considerably underestimated moss chlorophyll content, while stress indicators retrieved from UAS data were found to be comparable with independent field measurements, providing statistically significant regression coefficients of determination (median r
2 = .50, pt test = .0072)., This study demonstrates the superior performance of a cost-efficient UAS mapping platform, which can be deployed even under the continuous cloud cover that often obscures optical high-altitude airborne and satellite observations. Antarctic moss vigour maps of appropriate resolution could provide timely and spatially explicit warnings of environmental stress events, including those triggered by climate change. Since our polar vegetation health assessment method is based on physical principles of quantitative spectroscopy, it could be adapted to other short-stature and fragmented plant communities (e.g. tundra grasslands), including alpine and desert regions. It therefore shows potential to become an operational component of any ecological monitoring sensor network. [ABSTRACT FROM AUTHOR]- Published
- 2017
- Full Text
- View/download PDF
245. Spatio-temporal connectivity: assessing the amount of reachable habitat in dynamic landscapes.
- Author
-
Martensen, Alexandre Camargo, Saura, Santiago, Fortin, Marie‐Josee, and Lecomte, Nicolas
- Subjects
LANDSCAPE ecology ,MATHEMATICAL models of habitats ,SPATIOTEMPORAL processes ,HOME range (Animal geography) ,GRAPH theory ,MATHEMATICAL models - Abstract
Landscape heterogeneity and habitat connectivity affect species movements, playing an important role in determining the likelihood of species persistence. However, landscape connectivity is usually evaluated using static snap-shots, which do not account for the sequential interactions among habitat patches through time., We developed a network-based model of landscape dynamics, and corresponding connectivity metrics, to account for the reachable habitat across space and time. We illustrate the behaviour of these metrics, using fragmented forested landscapes in the Atlantic Forest of Brazil. We parametrized the models using the dispersal capacities of selected bird and small mammal species., We found that when considering spatio-temporal links, connectivity is estimated to be on average 30% higher (with a maximum of 150% higher) than what is estimated from purely spatial models. This higher degree of spatio-temporal connectivity arises due to connections through temporal stepping-stone patches that appear (habitat gain) and disappear (habitat loss) over time. Species with short dispersal distances (<1000 m) particularly benefited from the spatio-temporal connections. The contribution of spatio-temporal connectivity to habitat reachability increased with higher habitat loss rates. Moreover, it depended on the amount of habitat in the landscape, being higher at intermediate habitat amounts (∼30%)., We showed that accounting for spatio-temporal connectivity is critical for understanding ecological patterns and processes in dynamic landscapes, and that a series of purely spatial connectivity metrics underestimates the actual connectivity patterns across time. The proposed spatio-temporal connectivity approach and metrics can be applied to evaluate the effective connectivity patterns and trends in a variety of dynamic landscapes, avoiding the potential overestimates of population isolation and extinction probabilities that may result from widely used purely spatial connectivity models. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
246. Écologie de la reproduction du harfang des neiges dans l’Arctique canadien
- Author
-
Therrien, Jean-François, primary, Gauthier, Gilles, additional, Robillard, Audrey, additional, Lecomte, Nicolas, additional, and Bêty, Joël, additional
- Published
- 2014
- Full Text
- View/download PDF
247. Polar Bears from Space: Assessing Satellite Imagery as a Tool to Track Arctic Wildlife
- Author
-
Stapleton, Seth, primary, LaRue, Michelle, additional, Lecomte, Nicolas, additional, Atkinson, Stephen, additional, Garshelis, David, additional, Porter, Claire, additional, and Atwood, Todd, additional
- Published
- 2014
- Full Text
- View/download PDF
248. Sources of variation in small rodent trophic niche: new insights from DNA metabarcoding and stable isotope analysis
- Author
-
Soininen, Eeva M., primary, Ehrich, Dorothée, additional, Lecomte, Nicolas, additional, Yoccoz, Nigel G., additional, Tarroux, Arnaud, additional, Berteaux, Dominique, additional, Gauthier, Gilles, additional, Gielly, Ludovic, additional, Brochmann, Christian, additional, Gussarova, Galina, additional, and Ims, Rolf A., additional
- Published
- 2014
- Full Text
- View/download PDF
249. Genetic diversity in caribou linked to past and future climate change
- Author
-
Yannic, Glenn, Pellissier, Loïc, Ortego, Joaquin, Lecomte, Nicolas, Couturier, Serge, Cuyler, Christine, Dussault, Christian, Hundertmark, Kris J., Irvine, R. Justin, Jenkins, Deborah A., Kolpashikov, Leonid, Mager, Karen, Musiani, Marco, Parker, Katherine L. (Katherine Lynn), Røed, Knut H., Sipko, Taras, Þórisson, Skarphéðinn G., Weckworth, Byron V., Guisan, A. (Antoine ), Bernatchez, Louis, Côté, Steeve D., Yannic, Glenn, Pellissier, Loïc, Ortego, Joaquin, Lecomte, Nicolas, Couturier, Serge, Cuyler, Christine, Dussault, Christian, Hundertmark, Kris J., Irvine, R. Justin, Jenkins, Deborah A., Kolpashikov, Leonid, Mager, Karen, Musiani, Marco, Parker, Katherine L. (Katherine Lynn), Røed, Knut H., Sipko, Taras, Þórisson, Skarphéðinn G., Weckworth, Byron V., Guisan, A. (Antoine ), Bernatchez, Louis, and Côté, Steeve D.
- Abstract
Climate-driven range fluctuations during the Pleistocene have continuously reshaped species distribution leading to populations of contrasting genetic diversity. Contemporary climate change is similarly influencing species distribution and population structure, with important consequences for patterns of genetic diversity and species’ evolutionary potential1 . Yet few studies assess the impacts of global climatic changes on intraspecific genetic variation2–5 . Here, combining analyses of molecular data with time series of predicted species distributions and a model of diffusion through time over the past 21 kyr, we unravel caribou response to past and future climate changes across its entire Holarctic distribution. We found that genetic diversity is geographically structured with two main caribou lineages, one originating from and confined to Northeastern America, the other originating from Euro-Beringia but also currently distributed in western North America. Regions that remained climatically stable over the past 21 kyr maintained a high genetic diversity and are also predicted to experience higher climatic stability under future climate change scenarios. Our interdisciplinary approach, combining genetic data and spatial analyses of climatic stability (applicable to virtually any taxon), represents a significant advance in inferring how climate shapes genetic diversity and impacts genetic structure.
- Published
- 2013
250. Marine Mammal Strandings and Environmental Changes: A 15-Year Study in the St. Lawrence Ecosystem
- Author
-
Truchon, Marie-Hélène, Measures, Lena, L'Hérault, Vincent, Brêthes, Jean-Claude, Galbraith, Peter S., Harvey, Michel, Lessard, Sylvie, Starr, Michel, Lecomte, Nicolas, Truchon, Marie-Hélène, Measures, Lena, L'Hérault, Vincent, Brêthes, Jean-Claude, Galbraith, Peter S., Harvey, Michel, Lessard, Sylvie, Starr, Michel, and Lecomte, Nicolas
- Abstract
Understanding the effects of climatic variability on marine mammals is challenging due to the complexity of ecological interactions. We used general linear models to analyze a 15-year database documenting marine mammal strandings (1994–2008; n = 1,193) and nine environmental parameters known to affect marine mammal survival, from regional (sea ice) to continental scales (North Atlantic Oscillation, NAO). Stranding events were more frequent during summer and fall than other seasons, and have increased since 1994. Poor ice conditions observed during the same period may have affected marine mammals either directly, by modulating the availability of habitat for feeding and breeding activities, or indirectly, through changes in water conditions and marine productivity (krill abundance). For most species (75%, n = 6 species), a low volume of ice was correlated with increasing frequency of stranding events (e.g. R2adj = 0.59, hooded seal, Cystophora cristata). This likely led to an increase in seal mortality during the breeding period, but also to increase habitat availability for seasonal migratory cetaceans using ice-free areas during winter. We also detected a high frequency of stranding events for mysticete species (minke whale, Balaenoptera acutorostrata) and resident species (beluga, Delphinapterus leucas), correlated with low krill abundance since 1994. Positive NAO indices were positively correlated with high frequencies of stranding events for resident and seasonal migratory cetaceans, as well as rare species (R2adj = 0.53, 0.81 and 0.34, respectively). This contrasts with seal mass stranding numbers, which were negatively correlated with a positive NAO index. In addition, an unusual multiple species mortality event (n = 114, 62% of total annual mortality) in 2008 was caused by a harmful algal bloom. Our findings provide an empirical baseline in understanding marine mammal survival when faced with climatic variability. This is a promising step in integrating stran
- Published
- 2013
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.