Now showing items 295-314 of 365

  • Støa, Bente; Halvorsen, Rune; Mazzoni, Sabrina; Gusarov, Vladimir (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    This paper provides a theoretical understanding of sampling bias in presence-only data in the context of species distribution modelling. This understanding forms the basis for two integrated frameworks, one for detecting ...
  • Walls, Ramona L.; Deck, John; Guralnick, Robert; Baskauf, Steve; Beaman, Reed; Blum, Stanley; Bowers, Shawn; Buttigieg, Pier Luigi; Davis, Neil; Endresen, Dag Terje Filip; Gandolfo, Maria Alejandra; Hanner, Robert; Janning, Alyssa; Krishtalka, Leonard; Matsunaga, Andréa; Midford, Peter; Morrison, Norman; Ó Tuama, Éamonn; Schildhauer, Mark; Smith, Barry; Stucky, Brian J.; Thomer, Andrea; Wieczorek, John; Whitacre, Jamie; Wooley, John (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    The study of biodiversity spans many disciplines and includes data pertaining to species distributions and abundances, genetic sequences, trait measurements, and ecological niches, complemented by information on collection ...
  • Botnen, Synnøve Smebye; Davey, Marie Louise; Halvorsen, Rune; Kauserud, Håvard (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    Analysis of microbial community structure by multivariate ordination methods, using data obtained by high‐throughput sequencing of amplified markers (i.e., DNA metabarcoding), often requires clustering of DNA sequences ...
  • Johnsen, Arild; Kearns, Anna Marika; Omland, Kevin E.; Anmarkrud, Jarl Andreas (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Previous studies based on single mitochondrial markers have shown that the common raven (Corvus corax) consists of two highly diverged lineages that are hypothesised to have undergone speciation reversal upon secondary ...
  • Evju, Marianne (Doctoral thesis / Doktoravhandling, 2009)
    Large herbivores such as sheep affect plants directly and indirectly through selective foraging, trampling, urination and defecation, thereby modifying intra- and interspecific interactions and altering resource availability ...
  • Králová, Tereza; Albrecht, Tomas; Bryja, Josef; Horák, David; Johnsen, Arild; Lifjeld, Jan Terje; Novotny, Marian; Sedlacek, Ondrej; Velova, Hana; Vinkler, Michal (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    Positive selection acting on Toll‐like receptors (TLRs) has been recently investigated to reveal evolutionary mechanisms of host–pathogen molecular co‐adaptation. Much of this research, however, has focused mainly on the ...
  • Ravinet, Mark; Elgvin, Tore Oldeide; Trier, Cassandra Nicole; Aliabadian, Mansour; Gavrilov, Andrey; Sætre, Glenn-Peter (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    House sparrows (Passer domesticus) are a hugely successful anthrodependent species; occurring on nearly every continent. Yet, despite their ubiquity and familiarity to humans, surprisingly little is known about their ...
  • Liu, Hai Ying; Halvorsen, Rune (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
    The aim of this study is to examine the effect of individual canopy tree on the species composition and abundance of understorey vegetation in subtropical forests, by applying a model for tree influence on understorey ...
  • Magnussen, Trude; Kjærandsen, Jostein; Johnsen, Arild; Søli, Geir Einar Ellefsen (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Only one species of the genus Allodia has been previously recorded from the Afrotropical region, Allodia (Brachycampta) flavorufa Matile, 1978. Six new species are described here, all representing the nominotypical subgenus, ...
  • Nater, Chloe Rebecca; Vindenes, Yngvild; Aas, Per; Cole, Diana; Langangen, Øystein; Moe, S. Jannicke; Rustadbakken, Atle; Turek, Daniel; Vøllestad, Leif Asbjørn; Ergon, Torbjørn (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    1. Evidence‐based management of natural populations under strong human influence frequently requires not only estimates of survival but also knowledge about how much mortality is due to anthropogenic vs. natural causes. ...
  • Soininen, Eeva M; Ehrich, Dorothee; Lecomte, Nicolas; Yoccoz, Nigel Gilles; Tarroux, Arnaud; Berteaux, Dominique; Gauthier, Gilles; Gielly, Ludovic; Brochmann, Christian; Gussarova, Galina; Ims, Rolf Anker (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2014)
    Intraspecific competition for food is expected to increase the trophic niche width of consumers, defined here as their diet diversity, but this process has been little studied in herbivores. Population densities of small ...
  • Huser, Brian J.; Futter, Martyn N.; Bogan, Daniel; Brittain, John Edward; Culp, Joseph M; Goedkoop, Willem; Gribovskaya, Iliada; Karlsson, Jan; Lau, Danny C.P.; Ruhland, Kathleen M; Schartau, Ann Kristin; Shaftel, Rebecca; Smol, John P.; Vrede, Tobias; Lento, Jennifer (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    1. Freshwater chemistry across the circumpolar region was characterised using a pan-Arctic data set from 1,032 lake and 482 river stations. Temporal trends were estimated for Early (1970–1985), Middle (1986–2000), and Late ...
  • Ameen, Carly; Feuerborn, Tatiana R.; Brown, Sarah K.; Linderholm, Anna; Hulme-Beaman, Ardern; Lebrasseur, Ophelie; Sinding, Mikkel Holger Strander; Lounsberry, Zachary T.; Lin, Audrey T.; Appelt, Martin; Bachmann, Lutz; Betts, Matthew; Britton, Kate; Darwent, John; Dietz, Rune; Fredholm, Merethe; Gopalakrishnan, Shyam; Goruinova, Olga I.; Grønnow, Bjarne; Haile, James; Hallsson, Jón Hallsteinn; Harrison, Ramona; Heide-Jørgensen, Mads-Peter; Knecht, Rick; Losey, Robert J.; Masson-MacLean, Edouard; McGovern, Thomas H.; McMagnus-Fry, Ellen; Meldgaard, Morten; Midtdal, Åslaug; Moss, Madonna L.; Nikitin, Iurii G.; Nomokonova, Tatiana; Palsdottir, Albina Hulda; Perri, Angela; Popov, Aleksandr N.; Rankin, Lisa; Reuther, Joshua D.; Sablin, Mikhail V.; Schmidt, Anne Lisbeth; Shirar, Scott; Smiarowski, Konrad; Sonne, Christian; Stiner, Mary C.; Vasyukov, Mitya; West, Catherine F.; Ween, Gro Birgit; Wennerberg, Sanne Eline; Wiig, Øystein; Woollett, James; Dalén, Love; Hansen, Anders J.; Gilbert, Marcus Thomas Pius; Sacks, Benjamin N; Frantz, Laurent A.F.; Larson, Greger; Dobney, Keith; Darwent, Christyann M.; Evin, Allowen (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
    Domestic dogs have been central to life in the North American Arctic for millennia. The ancestors of the Inuit were the first to introduce the widespread usage of dog sledge transportation technology to the Americas, but ...
  • Gustafsson, A. Lovisa S. (Doctoral thesis / Doktoravhandling, 2013)
    The main objectives of this thesis are to study patterns and processes of plant speciation in arctic and alpine diploid plants. Cryptic species are here referred to as morphologically similar individuals belonging to the ...
  • Lifjeld, Jan T; Anmarkrud, Jarl A; Calabuig, Pascual; Cooper, Joseph E J; Johannessen, Lars E; Johnsen, Arild; Kearns, Anna M; Lachlan, Robert F; Laskemoen, Terje; Marthinsen, Gunnhild; Stensrud, Even; Garcia-del-Rey, Eduardo (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    Background One of the biggest challenges in avian taxonomy is the delimitation of allopatric species because their reproductive incompatibility cannot be directly studied in the wild. Instead, reproductive ...
  • Albrecht, Tomas; Opletalová, Kamila; Reif, Jiri; Janousek, Vaclav; Pialek, Lubomir; Cramer, Emily Rebecca A; Johnsen, Arild; Reifova, Radka (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    Postcopulatory sexual selection may promote evolutionary diversification in sperm form, but the contribution of between‐species divergence in sperm morphology to the origin of reproductive isolation and speciation remains ...
  • Støstad, Hanna Nyborg; Rowe, Melissah; Johnsen, Arild; Tomasek, Oldrich; Albrecht, Tomas; Lifjeld, Jan Terje (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    In a rapidly changing world, it is important to understand how urban environments impact wildlife. For example, supplementary feeding of birds, though well‐intended, might have unexpected negative effects on the health of ...
  • Støstad, Hanna Nyborg; Rowe, Melissah; Johnsen, Arild; Lifjeld, Jan Terje (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
    Sperm morphology varies enormously across the animal kingdom. Whilst knowledge of the factors that drive the evolution of interspecific variation in sperm morphology is accumulating, we currently have little understanding ...
  • Støstad, Hanna Nyborg; Johnsen, Arild; Lifjeld, Jan Terje; Rowe, Melissah (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    Sperm exhibit extraordinary levels of morphological diversification across the animal kingdom. In songbirds, sperm have a helically shaped head incorporating a distinct acrosomal membrane or “helical keel,” the form and ...
  • Laskemoen, Terje (Doctoral thesis / Doktoravhandling, 2010)
    Sperm cells are the most variable animal cells, and a tremendous variation in sperm phenotypes exists among species, from minute amoeboid sperm to giant sperm in some species of fruit flies. Much effort has been devoted ...