Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2013
Forfattere
Nils VagstadSammendrag
Det er ikke registrert sammendrag
Forfattere
Nils VagstadSammendrag
Det er ikke registrert sammendrag
Forfattere
Nils VagstadSammendrag
Det er ikke registrert sammendrag
Forfattere
Nils VagstadSammendrag
Det er ikke registrert sammendrag
Forfattere
Esra Ozdenerol Gregory Taff Cem AkkusSammendrag
Over the last two decades West Nile Virus (WNV) has been responsible for significant disease outbreaks in humans and animals in many parts of the World. Its extremely rapid global diffusion argues for a better understanding of its geographic extent. The purpose of this inquiry was to explore spatio-temporal patterns of WNV using geospatial technologies to study populations of the reservoir hosts, vectors, and human hosts, in addition to the spatio-temporal interactions among these populations. Review of the recent literature on spatial WNV disease risk modeling led to the conclusion that numerous environmental factors might be critical for its dissemination. New Geographic Information Systems (GIS)-based studies are monitoring occurrence at the macro-level, and helping pinpoint areas of occurrence at the micro-level, where geographically-targeted, species-specific control measures are sometimes taken and more sophisticated methods of surveillance have been used.
Forfattere
Nate McDowell Rosie A. Fisher Chonggang Xu J.C. Domec Teemu Hölttä D. Scott Mackay John Sperry Amanda Boutz L Dickmann Nathan Gehres Jean Marc Limousin Alison Macalady Jordi Maritinez-Vilalta Maurizio Mencuccini Jennifer Plaut Jèrôme Ogèe Robert E. Pangle Daniel Rasse Michael G. Ryan Sanna Sevanto Richard H. Waring A. Park Williams Enrico A. Yepez William T. PockmanSammendrag
Det er ikke registrert sammendrag
Forfattere
Laura JaakolaSammendrag
Det er ikke registrert sammendrag
Forfattere
Katharina Bäutigam Kelly J. Vining Clément Lafon-Placette Carl Gunnar Fossdal Marie Mirouze José Gutiérrez Marcos Silvia Fluch Mario Fernández Fraga M. Ángeles Guevara Dolores Abarca Øystein Johnsen Stéphane Maury Steven H. Strauss Malcolm M. Campbell Antje Rohde Carmen Díaz-Sala María-Teresa CerveraSammendrag
Epigenetic variation is likely to contribute to the phenotypic plasticity and adaptative capacity of plant species, and may be especially important for long-lived organisms with complex life cycles, including forest trees. Diverse environmental stresses and hybridization/polyploidization events can create reversible heritable epigenetic marks that can be transmitted to subsequent generations as a form of molecular “memory”. Epigenetic changes might also contribute to the ability of plants to colonize or persist in variable environments. In this review, we provide an overview of recent data on epigenetic mechanisms involved in developmental processes and responses to environmental cues in plant, with a focus on forest tree species. We consider the possible role of forest tree epigenetics as a new source of adaptive traits in plant breeding, biotechnology, and ecosystem conservation under rapid climate change.
Forfattere
Jarkko Koskela Franҫois Lefèvre Silvio Schüler Hojka Kraigher Ditte C. Olrik Jason Hubert Roman Longauer Michele Bozzano Leena Yrjänä Paraskevi Alizoti Peter Rotach Lorenzo Vietto Sándor Bordács Tor Myking Thröstur Eysteinsson Oudara Souvannavong Bruno Fady Bart De Cuyper Berthold Heinze Georg von Wühlisch Alexis Ducousso Bjerne DitlevsenSammendrag
This paper provides a review of theoretical and practical aspects related to genetic management of forest trees. The implementation of international commitments on forest genetic diversity has been slow and partly neglected. Conservation of forest genetic diversity is still riddled with problems, and complexities of national legal and administrative structures. Europe is an example of a complex region where the distribution ranges of tree species extend across large geographical areas with profound environmental differences, and include many countries. Conservation of forest genetic diversity in Europe has been hampered by a lack of common understanding on the management requirements for genetic conservation units of forest trees. The challenge resides in integrating scientific knowledge on conservation genetics into management of tree populations so that recommendations are feasible to implement across different countries. Here, we present pan-European minimum requirements for dynamic conservation units of forest genetic diversity. The units are natural or man-made tree populations which are managed for maintaining evolutionary processes and adaptive potential across generations. Each unit should have a designated status and a management plan, and one or more tree species recognized as target species for genetic conservation. The minimum sizes of the units are set at 500, 50 or 15 reproducing individuals depending on tree species and conservation objectives. Furthermore, silvicultural interventions should be allowed to enhance genetic processes, as needed, and field inventories carried out to monitor regeneration and the population size. These minimum requirements are now used by 36 countries to improve management of forest genetic diversity.
Forfattere
Marie Davey Einar Heegaard Rune Halvorsen Håvard Kauserud Mikael OhlsonSammendrag
Although bryophytes are a dominant vegetation component of boreal and alpine ecosystems, little is known about their associated fungal communities. HPLC assays of ergosterol (fungal biomass) and amplicon pyrosequencing of the ITS2 region of rDNA were used to investigate how the fungal communities associated with four bryophyte species changed across an elevational gradient transitioning from conifer forest to the low-alpine. Fungal biomass and OTU richness associated with the four moss hosts did not vary significantly across the gradient (P > 0.05), and both were more strongly affected by host and tissue type. Despite largely constant levels of fungal biomass, distinct shifts in community composition of fungi associated with Hylocomium, Pleurozium and Polytrichum occurred between the elevation zones of the gradient. This likely is a result of influence on fungal communities by major environmental factors such as temperature, directly or indirectly mediated by, or interacting with, the response of other components of the vegetation (i.e. the dominant trees). Fungal communities associated with Dicranum were an exception, exhibiting spatial autocorrelation between plots, and no significant structuring by elevation. Nevertheless, the detection of distinct fungal assemblages associated with a single host growing in different elevation zones along an elevational gradient is of particular relevance in the light of the ongoing changes in vegetation patterns in boreal and alpine systems due to global climate warming.