Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2021
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Authors
Cornelya KlutschAbstract
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Jeremy C. Andersen Nathan P. Havill Brian P. Griffin Jane U. Jepsen Snorre Hagen Tero Klemola Isabel C. Barrio Sofie A. Kjeldgaard Toke T. Høye John Murlis Yuri N. Baranchikov Andrey V. Selikhovkin Ole Petter Laksforsmo Vindstad Adalgisa Caccone Joseph S. ElkintonAbstract
The frequency and severity of outbreaks by pestiferous insects is increasing globally, likely as a result of human-mediated introductions of non-native organisms. However, it is not always apparent whether an outbreak is the result of a recent introduction of an evolutionarily naïve population, or of recent disturbance acting on an existing population that arrived previously during natural range expansion. Here we use approximate Bayesian computation to infer the colonization history of a pestiferous insect, the winter moth, Operophtera brumata L. (Lepidoptera: Geometridae), which has caused widespread defoliation in northern Fennoscandia. We generated genotypes using a suite of 24 microsatellite loci and find that populations of winter moth in northern Europe can be assigned to five genetically distinct clusters that correspond with 1) Iceland, 2) the British Isles, 3) Central Europe and southern Fennoscandia, 4) Eastern Europe, and 5) northern Fennoscandia. We find that the northern Fennoscandia winter moth cluster is most closely related to a population presently found in the British Isles, and that these populations likely diverged around 2,900 years ago. This result suggests that current outbreaks are not the result of a recent introduction, but rather that recent climate or habitat disturbance is acting on existing populations that may have arrived to northern Fennoscandia via pre-Roman traders from the British Isles, and/or by natural dispersal across the North Sea likely using the Orkney Islands of northern Scotland as a stepping-stone before dispersing up the Norwegian coast. approximate bayesian computation, Quaternary climatic oscillations, Lepidoptera, population genetics
Authors
Maria Papale Carmen Rizzo Gabriella Caruso Stefano Amalfitano Giovanna Maimone Stefano Miserocchi Rosabruna La Ferla Paul Eric Aspholm Franco Decembrini Filippo Azzaro Antonella Conte Marco Graziano Alessandro Ciro Rappazzo Angelina Lo Giudice Maurizio AzzaroAbstract
The effects of climate change-induced ice melting on the microbial communities in different glacial-fed aquatic systems have been reported, but seasonal dynamics remain poorly investigated. In this study, the structural and functional traits of the aquatic microbial community were assessed along with the hydrological and biogeochemical variation patterns of the Arctic Pasvik River under riverine and brackish conditions at the beginning (May = Ice-melt (−)) and during the ice-melting season (July = Ice-melt (+)). The microbial abundance and morphometric analysis showed a spatial diversification between the riverine and brackish stations. Results highlighted different levels of microbial respiration and activities with different carbon and phosphorous utilization pathways, thus suggesting an active biogeochemical cycling along the river especially at the beginning of the ice-melting period. At Ice-melt (−), Gammaproteobacteria and Alphaproteobacteria were dominant in riverine and brackish stations, respectively. Conversely, at Ice-melt (+), the microbial community composition was more homogeneously distributed along the river (Gammaproteobacteria > Alphaproteobacteria > Bacteroidetes). Our findings provide evidence on how riverine microbial communities adapt and respond to seasonal ice melting in glacial-fed aquatic ecosystems.
Authors
Yngvild Wasteson Henning Sørum Bjørn-Arne Lindstedt Adriana Dorota Osinska Arnfinn Sundsfjord Hans Geir Eiken Erik J. Joner Anders Aas Carsten Ulrich Schwermer Pawel Krzeminski Ernst Kristian Rødland Astrid Louise Wester Halfdan Olafssøn Andre Olafssøn Trond Ingebretsen Rune Holmstad Nina DueAbstract
No abstract has been registered
Authors
Yngvild Wasteson Henning Sørum Bjørn-Arne Lindstedt Arnfinn Sundsfjord Hans Geir Eiken Erik J. Joner Anders Aas Carsten Ulrich Schwermer Pawel Krzeminski Ernst Kristian Rødland Astrid Louise Wester Halfdan Olafssøn Andre Olafssøn Trond Ingebretsen Rune Holmstad Nina DueAbstract
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Authors
Tove Aagnes Utsi Nigel Yoccoz Claire Armstrong Victoria Gonzalez Snorre Hagen Ingibjörg Svala Jónsdóttir Nhat Minh Pham Francisco I. Pugnaire Katriona Shea David A. Wardle Sophia Zielosko Kari Anne BråthenAbstract
No abstract has been registered
Abstract
Climate change is expected to increase the frequency and intensity of extreme events in northern ecosystems. The outcome of these events across the landscape, might be mediated by species effects, such as niche construction, with likely consequences on vegetation resilience. To test this hypothesis, we simulated an extreme event by removing aboveground vegetation in tundra heathlands dominated by the allelopathic dwarf shrub Empetrum nigrum, a strong niche constructor. We tested the hypothesis under different climate regimes along a 200-km long gradient from oceanic to continental climate in Northern Norway. We studied the vegetation recovery process over ten years along the climatic gradient. The recovery of E. nigrum and subordinate species was low and flattened out after five years at all locations along the climatic gradient, causing low vegetation cover at the end of the study in extreme event plots. Natural seed recruitment was low at all sites, however, the addition of seeds from faster growing species did not promote vegetation recovery. A soil bioassay from 8 years after the vegetation was removed, suggested the allelopathic effect of E. nigrum was still present in the soil environment. Our results provide evidence of how a common niche constructor species can dramatically affect ecosystem recovery along a climatic gradient after extreme events in habitats where it is dominant. By its extremely slow regrowth and it preventing establishment of faster growing species, this study increases our knowledge on the possible outcomes when extreme events harm niche constructors in the tundra.