43 Works

Data from: Trait-dependent distributional shifts in fruiting of common British fungi

Alan C. Gange, Einar Heegaard, Lynne Boddy, Carrie Andrew, Paul Kirk, Rune Halvorsen, Thomas W. Kuyper, Claus Bässler, Jeffrey Diez, Jacob Heilman-Clausen, Klaus Høiland, Ulf Büntgen & Håvard Kauserud
Despite the dramatic phenological responses of fungal fruiting to recent climate warming, it is unknown whether spatial distributions of fungi have changed and to what extent such changes are influenced by fungal traits, such as ectomycorrhizal (ECM) or saprotrophic lifestyles, spore characteristics, or fruit body size. Our overall aim was to understand how climate and fungal traits determine whether and how species-specific fungal fruit body abundances have shifted across latitudes over time, using the UK...

Data for: Phytochemical shift from condensed tannins to flavonoids in transgenic Betula pendula decreases consumption and growth but improves growth efficiency of Epirrita autumnata larvae

Paula Thitz, Lauri Mehtätalo, Panu Välimäki, Tendry Randriamanana, Mika Lännenpää, Ann E. Hagerman, Tommi Andersson, Riitta Julkunen-Tiitto & Tommi Nyman
Despite active research, antiherbivore activity of specific plant phenolics remains largely unresolved. We constructed silver birch (Betula pendula) lines with modified phenolic metabolism to study the effects of foliar flavonoids and condensed tannins on consumption and growth of larvae of a generalist herbivore, the autumnal moth (Epirrita autumnata). We conducted a feeding experiment using birch lines in which expression of dihydroflavonol reductase (DFR), anthocyanidin synthase (ANS) or anthocyanidin reductase (ANR) had been decreased by RNA...

MetaComNet: A random forest-based framework for making spatial prediction of plant-pollinator interactions

Markus Arne Kjær Sydenham, Zander Venter, Trond Reitan, Claus Rasmussen, Astrid Skrindo, Daniel Skoog, Kaj-Andreas Hanevik, Stein Joar Hegland, Yoko Dupont, Anders Nielsen, Joseph Chipperfield & Graciela Rusch
1. Predicting plant-pollinator interaction networks over space and time will improve our understanding of how environmental change is likely to impact the functioning of ecosystems. Here we propose a framework for producing spatially explicit predictions of the occurrence and number of pairwise plant-pollinator interactions and of the species richness, diversity, and abundance of pollinators visiting flowers. We call the framework ‘MetaComNet’ because it aims to link metacommunity dynamics to the assembly of ecological networks. 2....

Data from: Future suitability of habitat in a migratory ungulate under climate change

Inger Maren Rivrud, Erling L. Meisingset, Leif Egil Loe & Atle Mysterud
With climate change, the effect of global warming on snow cover is expected to cause range expansion and enhance habitat suitability for species at their northern distribution limits. However, how this depend on landscape topography and sex in size-dimorphic species remains uncertain, and is further complicated for migratory animals following climate-driven seasonal resource fluctuations across vast landscapes. Using 11 years of data from a partially migratory ungulate at their northern distribution ranges, the red deer...

Data for: Parasitoids indicate major climate-induced shifts in Arctic communities

Tuomas Kankaanpää, Eero Vesterinen, Bess Hardwick, Niels Martin Martin Schmidt, Tommi Andersson, Paul Eric Aspholm, Isabel Barrio, Niklas Beckers, Joël Bêty, Tone Birkemoe, Melissa DeSiervo, Katherine Drotos, Dorothee Ehrich, Olivier Gilg, Vladimir Gilg, Nils Hein, Toke Høye, Kristian Jakobsen, Camille Jodouin, Jesse Jorna, Mikhail Kozlov, Jean-Claude Kresse, Don-Jean Leandri-Breton, Nicolas Lecomte, Maia Olsen … & Tomas Roslin
Climatic impacts are especially pronounced in the Arctic, which as a region is warming twice as fast as the rest of the globe. Here, we investigate how mean climatic conditions and rates of climatic change impact parasitoid insect communities in 16 localities across the Arctic. We focus on parasitoids in a wide-spread habitat, Dryas heathlands, and describe parasitoid community composition in terms of larval host use (i.e. parasitoid use of herbivorous Lepidoptera versus pollinating Diptera)...

Data from: Sociodemographic factors modulate the spatial response of brown bears to vacancies created by hunting

Shane C. Frank, Martin Leclerc, Fanie Pelletier, Frank Rosell, Jon E. Swenson, Richard Bischof, Jonas Kindberg, Hans Geir Eiken, Snorre B. Hagen, Andreas Zedrosser & Jon. E. Swenson
1.There is a growing recognition of the importance of indirect effects from hunting on wildlife populations, e.g., social and behavioral changes due to harvest, which occur after the initial offtake. Nonetheless, little is known about how the removal of members of a population influences the spatial configuration of the survivors. 2.We studied how surviving brown bears (Ursus arctos) used former home ranges that had belonged to casualties of the annual bear hunting season in southcentral...

Data from: Climate change and bird reproduction: warmer springs benefit breeding success in boreal forest grouse

Per Wegge & Jorund Rolstad
Global warming is predicted to adversely affect reproduction of birds, especially in northern latitudes. A recent study in Finland inferred that declining populations of black grouse Tetrao tetrix could be attributed to advancement of the time of mating and chicks hatching too early – a support of the mismatch hypothesis. Here, we examine the breeding success of sympatric capercaillie T. urogallus and black grouse over a 38-year period in southeast Norway. Breeding season temperatures increased,...

Data from: Multi-level patterns in population genetics: variogram series detects a hidden isolation-by- distance- dominated structure of Scandinavian brown bears Ursus arctos

Julia Schregel, Jaanus Remm, Hans Geir Eiken, Jon E. Swenson, Urmas Saarma & Snorre B. Hagen
1. Large-scale pattern-oriented approaches are useful to understand the multi-level processes that shape the genetic structure of a population. Matching the scales of patterns and putative processes is both a key to success and a challenge. 2. We have developed a simple statistical approach, based on variogram analysis, that identifies multiple spatial scales where the population pattern, in this case genetic structure, have highest expression (i.e. the spatial scales at which the strength of patterning...

Data from: Contributions of feather microstructure to eider down insulation properties

Liliana D'Alba, Thomas Holm Carlsen, Árni Ásgeirsson, Matthew D. Shawkey & Jon Einar Jonsson
Insulation is an essential component of nest structure that helps provide incubation requirements for birds. Many species of waterfowl breed in high latitudes where rapid heat loss can necessitate a high energetic input from parents and use down feathers to line their nests. Common eider Somateria mollissima nest down has exceptional insulating properties but the microstructural mechanisms behind the feather properties have not been thoroughly examined. Here, we hypothesized that insulating properties of nest down...

Data from: Spatial mismatch between management units and movement ecology of a partially migratory ungulate

Erling L. Meisingset, Leif Egil Loe, Øystein Brekkum, Richard Bischof, Inger Maren Rivrud, Unni Støbet Lande, Barbara Zimmermann, Vebjørn Veiberg & Atle Mysterud
1. Population-level management is difficult to achieve if wildlife routinely crosses administrative boundaries, as is particularly frequent for migratory populations. However, the degree of mismatch between management units and scales at which ecological processes operate has rarely been quantified. Such insight is vital for delimiting functional population units of partially migratory species common in northern forest ecosystems. 2. We combined an extensive dataset of 412 GPS-marked red deer (Cervus elaphus) across Norway with information on...

Data from: Norway and Sweden Green Roof (GF) plant data

Joel Lönnqvist, Hans Martin Hanslin & Birgitte Gisvold Johannessen
Standard succulent vegetation mixes developed mostly in temperate climates are being increasingly used on green roofs in different climate zones with uncertain outcome regarding vegetation survival and cover. We investigated vegetation on green roofs at nine temperate, cold and/or wet locations in Norway and Sweden covering wide ranges of latitude, mean annual temperature, annual precipitation, frequencies of freeze-thaw cycles and longest annual dry period. The vegetation on the roofs were surveyed in two consecutive years,...

Using ecological context to interpret spatiotemporal variation in natural selection

Elena Albertsen, Elena Albertsen, Øystein Opedal, Geir Bolstad, Rocio Barrales, Thomas Hansen, Christophe Pelabon & W. Scott Armbruster
Spatiotemporal variation in natural selection is expected, but difficult to estimate. Pollinator-mediated selection on floral traits provides a good system for understanding and linking variation in selection to differences in ecological context. We studied pollinator-mediated selection in five populations of Dalechampia scandens (Euphorbiaceae) in Costa Rica and Mexico. Using a nonlinear path-analytical approach, we assessed several functional components of selection, and linked variation in pollinator-mediated selection across time and space to variation in pollinator assemblages....

Data from: Wood modification by furfuryl alcohol caused delayed decomposition response in Rhodonia (Postia) placenta

Inger Skrede, Monica Hongrø Solbakken, Jaqueline Hess, Carl Gunnar Fossdal, Olav Hegnar & Gry Alfredsen
The aim of this study was to investigate differential expression profiles of the brown rot fungus Rhodonia placenta (previously Postia placenta) harvested at several time points when grown on radiata pine (Pinus radiata) and radiata pine with three different levels of modification by furfuryl alcohol, an environmentally benign commercial wood protection system. The entire gene expression pattern of a decay fungus is followed in untreated and modified wood from initial to advanced stages of decay....

Data from: Genetic changes caused by restocking and hydroelectric dams in demographically bottlenecked brown trout in a transnational subarctic riverine system

Cornelya F. C. Klutsch, Simo N. Maduna, Natalia Polikarpova, Kristin Forfang, Paul Eric Aspholm, Tommi Nyman, Hans Geir Eiken, Per-Arne Amundsen & Snorre B. Hagen
Habitat discontinuity, anthropogenic disturbance, and overharvesting have led to population fragmentation and declines worldwide. Preservation of remaining natural genetic diversity is crucial to avoid continued genetic erosion. Brown trout (Salmo trutta L.) is an ideal model species for studying anthropogenic influences on genetic integrity, as it has experienced significant genetic alterations throughout its natural distribution range due to habitat fragmentation, overexploitation, translocations, and stocking. The Pasvik River is a subarctic riverine system shared between Norway,...

Data from: Model-based ordination for species with unequal niche widths

Bert Van Der Veen, Francis K.C. Hui, Knut A. Hovstad, Erik B. Solbu & Robert B. O'Hara
It is common practice for ecologists to examine species niches in the study of community composition. The response curve of a species in the fundamental niche is usually assumed to be quadratic. The center of a quadratic curve represents a species' optimal environmental conditions, and the width its ability to tolerate deviations from the optimum. Most multivariate methods assume species respond linearly to the environment of the niche, or with a quadratic curve that is...

Short-Tandem-Repeat (STR) marker set for Eurasian lynx for article: Genetic analysis indicates spatial-dependent patterns of sex-biased dispersal in Eurasian lynx in Finland

Annika Herrero, Cornelya Klutsch, Katja Holmala, Simo Maduna, Alexander Kopatz, Hans Geir Eiken & Snorre Hagen
Conservation and management of large carnivores requires knowledge of female and male dispersal. Such information is crucial to evaluate the population’s status and thus management actions. This knowledge is challenging to obtain, often incomplete and contradictory at times. The size of the target population and the methods applied can bias the results. Also, population history and biological or environmental influences can affect dispersal on different scales within a study area. We have genotyped Eurasian lynx...

Data and scripts for: Quantitative assessment of observed vs. predicted responses to selection

Christophe Pelabon, Elena Albertsen, Arnaud Le Rouzic, Cyril Firmat, Geir H. Bolstad, W. Scott Armbruster & Thomas Hansen
Although artificial-selection experiments seem well suited to testing our ability to predict evolution, the correspondence between predicted and observed responses is often ambiguous due to the lack of uncertainty estimates. We present equations for assessing prediction error in direct and indirect responses to selection that integrate uncertainty in genetic parameters used for prediction and sampling effects during selection. Using these, we analyzed a selection experiment on floral traits replicated in two taxa of the Dalechampia...

Sea ice reduction drives genetic differentiation among Barents Sea polar bears

Simo Njabulo Maduna, Jon Aars, Ida Fløystad, Cornelya Klutsch, Eve Zeyl Fiskebeck, Øystein Wiig, Dorothee Ehrich, Magnus Andersen, Lutz Bachmann, Andrew Derocher, Tommi Nyman, Hans Geir Eiken & Snorre Hagen
Loss of Arctic sea ice due to climate change is predicted to reduce both genetic diversity and gene flow in ice-dependent species, with potential negative consequences for their long-term viability. Here, we tested for the population-genetic impacts of reduced sea ice cover on the polar bear (Ursus maritimus) sampled across two decades (1995–2016) from the Svalbard Archipelago, Norway, an area that is affected by rapid sea ice loss in the Arctic Barents Sea. We analysed...

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