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Schmidt, N. M., J. Humaidan, S. H. Pedersen, O. Gilg, and B. Sittler. (2014). Collapsing lemming cycles in Greenland – demographic consequences for lemming predators and its linkages to snow.
Abstract: Arctic Biodiversity Congress, Trondheim, Norway, 2-4 December
Programme: 1036
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Gilg, O. (2014). Greenland.
Abstract: Tundra Conservation Network (10-12 February 2014). The Peregrine Fund, World Center for Birds of Prey, Boise, USA
Programme: 1036
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Gilg, O., J. Moreau, and L. Bollache. (2015). Climate change and interspecific interactions within an arctic community of terrestrial vertebrates.
Abstract: Small mammal population outbreaks and their consequences, 24-26 March 2015, Frasne, France.
Programme: 1036
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Emily L. Weiser, Richard B. Lanctot, Stephen C. Brown, José A. Alves, Phil F. Battley, Rebecca Bentzen, Joël Bêty, Mary Anne Bishop, Megan Boldenow, Loïc Bollache, Bruce Casler, Maureen Christie, Jonathan T. Coleman, Jesse R. Conklin, Willow B. English, H. River Gates, Olivier Gilg, Marie-Andrée Giroux, Ken Gosbell, Chris Hassell, Jim Helmericks, Andrew Johnson, Borgný Katrínardóttir, Kari Koivula, Eunbi Kwon, Jean-Francois Lamarre, Johannes Lang, David B. Lank, Nicolas Lecomte, Joe Liebezeit, Vanessa Loverti, Laura McKinnon, Clive Minton, David Mizrahi, Erica Nol, Veli-Matti Pakanen, Johanna Perz, Ron Porter, Jennie Rausch, Jeroen Reneerkens, Nelli Rönkä, Sarah Saalfeld, Nathan Senner, Benoît Sittler, Paul A. Smith, Kristine Sowl, Audrey Taylor, David H. Ward, Stephen Yezerinac, Brett K. Sandercock. (2016). Effects of geolocators on hatching success, return rates, breeding movements, and change in body mass in 16 species of Arctic-breeding shorebirds (Vol. 4).
Abstract: 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.
Programme: 1036
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Bemmelen, R. v., B. Moe, S. A. Hanssen, N. M. Schmidt, and O. Gilg. (2016). Consistency of migration routes in a long-distance migratory seabird, the Long-tailed Skua.
Abstract: Animal Movement International Symposium: Bridging the Gap Between Modelling and Tracking Data, Lund, Sweden, 16-17 February 2016.http://www.canmove.lu.se/courses-workshops/workshops/animal-movement-international-symposium
Programme: 1036
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Niels M. Schmidt, Rolf A. Ims, Toke T. Høye, Olivier Gilg, Lars H. Hansen, Jannik Hansen, Magnus Lund, Eva Fuglei, Mads C. Forchhammer, Benoit Sittler. (2012). Response of an arctic predator guild to collapsing lemming cycles (Vol. 279). Bachelor's thesis, , .
Keywords: Alpine and arctic lemming populations appear to be highly sensitive to climate change, and when faced with warmer and shorter winters, their well-known high-amplitude population cycles may collapse. Being keystone species in tundra ecosystems, changed lemming dynamics may convey significant knock-on effects on trophically linked species. Here, we analyse long-term (1988–2010), community-wide monitoring data from two sites in high-arctic Greenland and document how a collapse in collared lemming cyclicity affects the population dynamics of the predator guild. Dramatic changes were observed in two highly specialized lemming predators: snowy owl and stoat. Following the lemming cycle collapse, snowy owl fledgling production declined by 98 per cent, and there was indication of a severe population decline of stoats at one site. The less specialized long-tailed skua and the generalist arctic fox were more loosely coupled to the lemming dynamics. Still, the lemming collapse had noticeable effects on their reproductive performance. Predator responses differed somewhat between sites in all species and could arise from site-specific differences in lemming dynamics, intra-guild interactions or subsidies from other resources. Nevertheless, population extinctions and community restructuring of this arctic endemic predator guild are likely if the lemming dynamics are maintained at the current non-cyclic, low-density state.
Programme: 1036
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Eidesen Pernille Bronken, Ehrich Dorothee, Bakkestuen Vegar, Alsos Inger Greve, Gilg Oliver, Taberlet Pierre, Brochmann Christian. (2013). Genetic roadmap of the Arctic: plant dispersal highways, traffic barriers and capitals of diversity (Vol. 200). Bachelor's thesis, , .
Abstract: Summary We provide the first comparative multispecies analysis of spatial genetic structure and diversity in the circumpolar Arctic using a common strategy for sampling and genetic analyses. We aimed to identify and explain potential general patterns of genetic discontinuity/connectivity and diversity, and to compare our findings with previously published hypotheses. We collected and analyzed 7707 samples of 17 widespread arctic?alpine plant species for amplified fragment length polymorphisms (AFLPs). Genetic structure, diversity and distinctiveness were analyzed for each species, and extrapolated to cover the geographic range of each species. The resulting maps were overlaid to produce metamaps. The Arctic and Atlantic Oceans, the Greenlandic ice cap, the Urals, and lowland areas between southern mountain ranges and the Arctic were the strongest barriers against gene flow. Diversity was highest in Beringia and gradually decreased into formerly glaciated areas. The highest degrees of distinctiveness were observed in Siberia. We conclude that large?scale general patterns exist in the Arctic, shaped by the Pleistocene glaciations combined with long?standing physical barriers against gene flow. Beringia served as both refugium and source for interglacial (re)colonization, whereas areas further west in Siberia served as refugia, but less as sources for (re)colonization.
Keywords: amplified fragment length polymorphisms (AFLP) Arctic comparative phylogeography genetic diversity genetic structure geographical information system (GIS) plant dispersal refugia
Programme: 1036
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Jannik Hansen, Malin Ek, Tomas Roslin, Jérôme Moreau, Maria Teixeira, Olivier Gilg, Niels Martin Schmidt. (2015). First Observation of a Four-egg Clutch of Long-tailed Jaeger (Stercorarius longicaudus) (Vol. 127).
Abstract: Long-tailed Jaegers (Stercorarius longicaudus) normally lay one or two eggs (rarely three), with a maximum of two eggs set by the existence of only two brood patches. Here, however, we present the first documentation of a clutch of four eggs in a Long-tailed Jaeger nest found at Zackenberg in northeastern Greenland.
Programme: 1036
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Pipaluk Nynne Skamris Andreassen, Niels Martin Schmidt, Christian Moliin Outzen Kapel, Martin Ulrich Christensen, Benoît Sittler, Olivier Gilg, Heidi Larsen Enemarka, Mohammad Nafi Solaiman Al-Sabi. (2017). Gastrointestinal parasites of two populations of Arctic foxes (Vulpes lagopus) from north-east Greenland (Vol. 36). Bachelor's thesis, , .
Abstract: Parasitological examination of 275 faecal samples from Arctic foxes (Vulpes lagopus) collected at Zackenberg Valley and Karupelv Valley in north-east Greenland from 2006 to 2008 was conducted using sieving and microscopy. Overall, 125 (45.5%) samples contained parasite eggs of Taenia crassiceps, Taenia serialis, Toxascaris leonina, Eucoleus boehmi, Physalopteridae and Ancylostomatidae, and Strongyloides-like larvae. As long-term ecological studies are conducted at both sampling locations, the present findings constitute a baseline data set for further parasitological monitoring.
Keywords: Arctic parasites coprological examination Eucoleus boehmi faecal analysis Taenia Toxascaris leonina
Programme: 1036
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Dominique Berteaux, Anne-Mathilde Thierry, Ray Alisauskas, Anders Angerbjörn, Eric Buchel, Liliya Doronina, Dorothee Ehrich, Nina E. Eide, Rasmus Erlandsson, Øystein Flagstad, Eva Fuglei, Olivier Gilg, Mikhail Goltsman, Heikki Henttonen, Rolf A. Ims, Siw T. Killengreen, Alexander Kondratyev, Elena Kruchenkova, Helmut Kruckenberg, Olga Kulikova, Arild Landa, Johannes Lang, Irina Menyushina, Julia Mikhnevich, Jukka Niemimaa, Karin Norén, Tuomo Ollila, Nikita Ovsyanikov, Liya Pokrovskaya, Ivan Pokrovsky, Anna Rodnikova, James D. Roth, Brigitte Sabard, Gustaf Samelius, Niels M. Schmidt, Benoit Sittler, Aleksandr A. Sokolov, Natalya A. Sokolova, Alice Stickney, Ester Rut Unnsteinsdóttir, Paula A. White. (2017). Harmonizing circumpolar monitoring of Arctic fox: benefits, opportunities, challenges and recommendations (Vol. 36). Bachelor's thesis, , .
Abstract: The biodiversity working group of the Arctic Council has developed pan-Arctic biodiversity monitoring plans to improve our ability to detect, understand and report on long-term change in Arctic biodiversity. The Arctic fox (Vulpes lagopus) was identified as a target of future monitoring because of its circumpolar distribution, ecological importance and reliance on Arctic ecosystems. We provide the first exhaustive survey of contemporary Arctic fox monitoring programmes, describing 34 projects located in eight countries. Monitored populations covered equally the four climate zones of the species’ distribution, and there were large differences between populations in long-term trends, multi-annual fluctuations, diet composition, degree of competition with red fox and human interferences. Den density, number of active dens, number of breeding dens and litter size were assessed in almost all populations, while projects varied greatly with respect to monitoring of other variables indicative of population status, ecosystem state or ecosystem function. We review the benefits, opportunities and challenges to increased integration of monitoring projects. We argue that better harmonizing protocols of data collection and data management would allow new questions to be addressed while adding tremendous value to individual projects. However, despite many opportunities, challenges remain. We offer six recommendations that represent decisive progress toward a better integration of Arctic fox monitoring projects. Further, our work serves as a template that can be used to integrate monitoring efforts of other species, thereby providing a key step for future assessments of global biodiversity.
Keywords: Alopex lagopus Arctic ecosystems biodiversity assessment biodiversity indicator CAFF: Conservation of Arctic Flora and Fauna data management IUCN: International Union for Conservation of Nature protocol harmonization
Programme: 1036
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