229 Works

Native range estimates for red-listed vascular plants

Jan Borgelt, Jorge Sicacha-Parada, Olav Skarpaas & Francesca Verones
Besides being central for understanding both global biodiversity patterns and associated anthropogenic impacts, species range maps are currently only available for a small subset of global biodiversity. Here, we provide a set of assembled spatial data for terrestrial vascular plants listed at the global IUCN red list. The dataset consists of pre-defined native regions for 47,675 species, density of available native occurrence records for 30,906 species, and standardized, large-scale Maxent predictions for 27,208 species, highlighting...

SWAN-Idiap

Raghavendra Ramachandra, Martin Stokkenes, Amir Mohammadi, Sushma Venkatesh, Kiran Raja, Pankaj Wasnik, Eric Poiret, Sébastien Marcel & Christoph Busch
SWAN-Idiap dataset is a multimodal biometric dataset (face, voice, and periocular) acquired using a smartphone. The SWAN-Idiap dataset comprises 150 subjects that are captured in six different sessions reflecting real-life scenarios of smartphone assisted authentication. One of the unique features of this dataset is that it is collected in four different geographic locations representing a diverse population and ethnicity. Additionally, it also contains a multimodal Presentation Attack (PA) or spoofing dataset using low-cost Presentation Attack...

Data from: Blossom colour change after pollination provides carbon for developing seeds

Christophe Pélabon, Lauriane Hennet, Richard Strimbeck, Hansen Johnson & William Scott Armbruster
1. We tested the hypothesis that greening of the floral (involucral) bracts of Dalechampia scandens blossoms after pollination (when bracts are white) increases carbon assimilation and provides photosynthate to developing seeds. 2. We investigated the importance of the involucral bracts for the process of seed development in two ways. First, we removed or shaded bracts of hand-pollinated blossoms to prevent their photosynthesis and tested the effects of these manipulations on seed development. Secondly, we measured...

Data from: Climatic conditions cause complex patterns of covariation between demographic traits in a long-lived raptor

Ivar Herfindal, Martijn Van De Pol, Jan T. Nielsen, Bernt-Erik Sæther, Anders P. Møller & Bernt-Erik Saether
1. Environmental variation can induce life-history changes that can last over a large part of the lifetime of an organism. If multiple demographic traits are affected, expected changes in climate may influence environmental covariances among traits in a complex manner. Thus, examining the consequences of environmental fluctuations requires that individual information at multiple life stages is available, which is particularly challenging in long-lived species. 2. Here, we analyse how variation in climatic conditions occurring in...

Data from: Cryptic choice of conspecific sperm controlled by the impact of ovarian fluid on sperm swimming behaviour

Sarah Elizabeth Yeates, Sian Elizabeth Diamond, Sigurd Einum, Brent C. Emerson, William V. Holt & Matthew J. G. Gage
Despite evidence that variation in male-female reproductive compatibility exists in many fertilization systems, identifying mechanisms of cryptic female choice at the gamete level has been a challenge. Here, under risks of genetic incompatibility through hybridization, we show how salmon and trout eggs promote fertilization by conspecific sperm. Using in vitro fertilization experiments that replicate the gametic micro-environment, we find complete inter-fertility between both species. However, if either species’ ova were presented with equivalent numbers of...

Data from: Effects of spring temperatures on the strength of selection on timing of reproduction in a long-distance migratory bird

Marcel E. Visser, Phillip Gienapp, Arild Husby, Michael Morrisey, Iván De La Hera, Francisco Pulido & Christiaan Both
Climate change has differentially affected the timing of seasonal events for interacting trophic levels, and this has often led to increased selection on seasonal timing. Yet, the environmental variables driving this selection have rarely been identified, limiting our ability to predict future ecological impacts of climate change. Using a dataset spanning 31 years from a natural population of pied flycatchers (Ficedula hypoleuca), we show that directional selection on timing of reproduction intensified in the first...

Data from: No evidence for thermal transgenerational plasticity in metabolism when minimizing the potential for confounding effects

Øystein Nordeide Kielland, Claus Bech & Sigurd Einum
Environmental change may cause phenotypic changes that are inherited across generations through transgenerational plasticity (TGP). If TGP is adaptive, offspring fitness increases with an increasing match between parent and offspring environment. Here we test for adaptive TGP in somatic growth and metabolic rate in response to temperature in the clonal zooplankton Daphnia pulex. Animals of the first focal generation experienced thermal transgenerational ‘mismatch’ (parental and offspring temperatures differed), whereas conditions of the next two generations...

Data from: Seasonal variation in male alternative reproductive tactics

Melanie J. Monroe, Trond Amundsen, Anne Christine Utne Palm, Kenyon B. Mobley & A. C. Utne-Palm
Genetic parentage analyses reveal considerable diversity in alternative reproductive behaviours (e.g. sneaking) in many taxa. However, little is known about whether these behaviours vary seasonally and between populations. Here, we investigate seasonal variation in male reproductive behaviours in a population of two-spotted gobies (Gobiusculus flavescens) in Norway. Male two-spotted gobies guard nests, attract females and care for fertilized eggs. We collected clutches and nest-guarding males early and late in the breeding season in artificial nests...

Data from: Persistent organic pollution in a high-Arctic top predator: sex-dependent thresholds in adult survival

Kjell Einar Erikstad, Hanno Sandvik, Tone Kristin Reiertsen, Jan Ove Bustnes, Hallvard Strøm & H. Strom
In long-lived species, any negative effect of pollution on adult survival may pose serious hazards to breeding populations. In the present study we measured concentrations of various organochlorines (OCs: PCB and organochlorine pesticides) in the blood of a large number of adult glaucous gulls (Larus hyperboreus) breeding on Bjørnøya (Bear Island) in the Norwegian Arctic, and modelled their local survival using capture–recapture analysis. Survival was negatively associated with concentrations of OCs in the blood. The...

Data from: Offspring fitness and the optimal propagule size in a fluctuating environment

Thomas Kvalnes, Anja Ås Røberg, Henrik Jensen, Håkon Holand, Henrik Pärn, Bernt-Erik Sæther, Thor Harald Ringsby & Bernt-Erik Saether
Propagule size is an important maternal effect on offspring fitness and phenotype in birds and other oviparous animals. The performance of propagules often increases with size, but a fluctuating environment may introduce temporal variation in the optimal phenotype. Understanding these mechanisms will provide novel insights into the eco-evolutionary dynamics of life history strategies in parental reproductive investment. We investigated the interaction between propagule size (measured as egg volume) and environmental conditions on offspring mortality and...

Data from: Operational sex ratio but not density affects sexual selection in a fish

Sebastian Wacker, Kenyon Mobley, Elisabet Forsgren, Lise Cats Myhre, Karen De Jong & Trond Amundsen
The operational sex ratio (OSR) and density are considered important factors affecting the strength of sexual selection. While there is increasing evidence that OSR and density affect the potential for sexual selection, few studies have addressed whether this is realized in phenotypic selection and how the two factors interact. We manipulated OSR (three levels) and male density (two levels) in 36 experimental breeding populations of Gobiusculus flavescens – a fish with paternal care. We measured...

Data from: Mate competition and resource competition are inter-related in sexual selection

Sebastian Wacker & Trond Amundsen
Sexual selection can be affected by the competition for limited breeding resources and/or the competition for limited mates. Although there is ample evidence for each type of competition by itself, little is known about their relative importance and interaction. To address these questions, we established 48 experimental breeding populations of the two-spotted goby (Gobiusculus flavescens), a substrate-breeding fish with paternal care. In three experimental treatments, males were limited in the access to either nest sites...

Data from: Migration and stress during reproduction govern telomere dynamics in a seabird

Jannik Schultner, Børge Moe, Olivier Chastel, Claus Bech & Alexander S. Kitaysky
Changes in telomere length are believed to reflect changes in physiological state and life expectancy in animals. However, much remains unknown about the determinants of telomere dynamics in wild populations, and specifically the influence of conditions during highly mobile life-history stages, for example migration. We tested whether telomere dynamics were associated with migratory behaviour and/or with stress during reproduction in free-living seabirds. We induced short-term stress during reproduction in chick-rearing, black-legged kittiwakes (Rissa tridactyla), tracked...

Data from: Characterizing morphological (co)variation using structural equation models: body size, allometric relationships and evolvability in a house sparrow metapopulation

Yimen Gerardo Araya-Ajoy, Peter S. Sjolte Ranke, Thomas Kvalnes, Bernt Rønning, Håkon Holand, Ane Marlene Myhre, Henrik Pärn, Henrik Jensen, Thor Harald Ringsby, Bernt-Erik Saether & Jonathan Wright
Body size plays a key role in the ecology and evolution of all organisms. Therefore, quantifying the sources of morphological (co)variation, dependent and independent of body size, is of key importance when trying to understand and predict responses to selection. We combine structural equation modeling with quantitative genetics analyses to study morphological (co)variation in a meta-population of house sparrows (Passer domesticus). As expected, we found evidence of a latent variable ‘body size’, causing genetic and...

Data from: Farmers without borders - genetic structuring in century old barley (Hordeum vulgare)

Jenny Hagenblad, Nils E. G. Forsberg, Joanne Russell, Malcolm Macaulay & Matti W. Leino
The geographic distribution of genetic diversity can reveal the evolutionary history of a species. For crop plants, phylogeographic patterns also indicate how seed has been exchanged and spread in agrarian communities. Such patterns are, however, easily blurred by the intense seed trade, plant improvement and even genebank conservation during the twentieth century, and discerning fine-scale phylogeographic patterns is thus particularly challenging. Using historical crop specimens, these problems are circumvented and we show here how high-throughput...

Data from: To breed or not to breed: endocrine response to mercury contamination by an Arctic seabird

Sabrina Tartu, Aurélie Goutte, Paco Bustamante, Frédéric Angelier, Børge Moe, Céline Clément-Chastel, Claus Bech, Geir Wing Gabrielsen, Jan Ove Bustnes & Olivier Chastel
Mercury, a ubiquitous toxic element, is known to alter expression of sex steroids and to impair reproduction across vertebrates but the mechanisms underlying these effects are not clearly identified. We examined whether contamination by mercury predicts the probability to skip reproduction in black-legged kittiwakes (Rissa tridactyla) from Svalbard. We also manipulated the endocrine system to investigate the mechanism underlying this relationship. During the pre-laying period, we injected exogenous GnRH (gonadotropin-releasing hormone) to test the ability...

Generalists versus specialists in fluctuating environments: a bet‐hedging perspective

Thomas Haaland, Jonathan Wright & Irja Ida Ratikainen
Bet‐hedging evolves in fluctuating environments because long‐term genotype success is determined by geometric (rather than arithmetic) mean fitness across generations. Diversifying bet‐hedging produces different specialist offspring, whereas conservative bet‐hedging produces similar generalist offspring. However, many fields, such as behavioral ecology and thermal physiology, typically consider specialist versus generalist strategies only in terms of maximizing arithmetic mean fitness benefits to individuals. Here we model how environmental variability affects optimal amounts of phenotypic variation within and among...

When does weather synchronise life history traits? Spatiotemporal patterns in juvenile body mass of two ungulates

Ivar Herfindal, Torkild Tveraa, Audun Stien, Erling Johan Solberg & Vidar Grøtan
1. Theory predicts that animal populations will be synchronised over large distances by weather and climatic conditions with high spatial synchrony. However, local variation in population responses to weather, and low synchrony in key weather variables or in other ecological processes may reduce the population synchrony. 2. We investigated to what extent temperature and precipitation during different periods of the year synchronised juvenile body mass of moose and reindeer in Norway. We expected high synchronising...

Environmental drivers of Sphagnum growth in peatlands across the Holarctic region

Fia Bengtsson, Håkan Rydin, Jennifer Baltzer, Luca Bragazza, Zhao-Jun Bu, Simon Caporn, Ellen Dorrepaal, Kjell Ivar Flatberg, Olga Galanina, Mariusz Gałka, Anna Ganeva, Irina Goia, Nadezhda Goncharova, Michal Hajek, Akira Haraguchi, Lorna Harris, Elyn Humphreys, Martin Jiroušek, Katarzyna Kajukało, Edgar Karofeld, Natalia Koronatova, Natalia Kosykh, Anna Laine, Mariusz Lamentowicz, Elena Lapshina … & Richard J. Payne
The relative importance of global versus local environmental factors for growth and thus carbon uptake of the bryophyte genus Sphagnum – the main peat-former and ecosystem engineer in northern peatlands – remains unclear. 2) We measured length growth and net primary production (NPP) of two abundant Sphagnum species across 99 Holarctic peatlands. We tested the importance of previously proposed abiotic and biotic drivers for peatland carbon uptake (climate, N deposition, water table depth, and vascular...

Environmental change reduces body condition, but not population growth, in a high-arctic herbivore

Kate Layton-Matthews, Vidar Grøtan, Brage Bremset Hansen, Maarten J. J.E. Loonen, Eva Fuglei & Dylan Childs
Environmental change influences fitness-related traits and demographic rates, which in herbivores are often linked to resource-driven variation in body condition. Coupled body condition-demographic responses may therefore be important for herbivore population dynamics in fluctuating environments, such as the Arctic. We applied a transient Life-Table Response Experiment (‘transient-LTRE’) to demographic data from Svalbard barnacle geese (Branta leucopsis), to quantify their population-dynamic responses to changes in body mass. We partitioned contributions from direct and delayed demographic and...

Multi-event capture-recapture analysis in Alpine chamois reveals contrasting responses to interspecific competition, within and between populations

Marlène Gamelon, Flurin Filli, Bernt-Erik Sæther & Ivar Herfindal
1. Understanding components of interspecific competition has long been a major goal in ecological studies. Classical models of competition typically consider equal responses of all individuals to the density of competitors, however responses may differ both among individuals from the same population, and between populations. 2. Based on individual long-term monitoring of two chamois populations in sympatry with red deer, we built a multi-event capture-recapture model to assess how vital rates of the smaller chamois...

Data from: Multi-generational genetic consequences of reinforcement in a bird metapopulation

Peter S. Ranke, Sigrun Skjelseth, Ingerid Julie Hagen, Anna Maria Billing, Åsa Alexandra Borg Pedersen, Henrik Pärn, Thor Harald Ringsby, Bernt-Erik Sæther & Henrik Jensen
Translocation of conspecific individuals to reduce extinction risk of small, isolated populations and prevent genetic depletion is a powerful tool in conservation biology. An important question is how the translocated individuals influence the long-term genetic composition of the recipient population. Here, we experimentally reinforced a house sparrow (Passer domesticus) population, and examined the impact of this translocation on allele frequencies, levels of heterozygosity and genetic differentiation over six cohorts. We found no permanent increase in...

The old and the large may suffer disproportionately during episodes of high temperature: evidence from a keystone zooplankton species

Tim Burton
Widespread declines in the body size of aquatic ectotherms have been attributed to the poorer ability of older, larger individuals to tolerate high temperature. Here, using the thermal death time curve framework, we investigate the relationship between temperature tolerance and size/age by measuring the change in heat tolerance of the keystone zooplankton species Daphnia magna across a range of temperature intensities (and hence exposures of varying duration) among individuals that differed up to three-fold in...

Data from: Novel sources of (co)variation in nestling begging behavior and hunger at different biological levels of analysis

Daniel Wetzel, Ariane Mutzel, Jonathan Wright & Niels Dingemanse
Biological hypotheses predicting patterns of offspring begging typically concern the covariance with hunger and/or development at specific hierarchical levels. For example, hunger drives within-individual patterns of begging, but begging also drives food intake among individuals within broods, and begging and food intake can covary positively or negatively among genotypes or broods. Testing biological phenomena that occur at multiple levels therefore requires the partitioning of covariance between traits of interest to ensure that each level-specific relationship...

Data from: The standard metabolic rate of a land snail (Cepaea hortensis) is a repeatable trait and influences winter survival

Claus Bech, Maren Trones Christiansen, Pernille Kvernland, Randi Marie Nygård, Eline Rypdal, Sara Kjeldsø Sneltorp, Liv Monica Trondrud & Øyvind Gjønnes Tvedten
Phenotypic selection on physiological parameters is an underrepresented topic in studies of evolutionary biology. There is especially a lack of studies involving invertebrate organisms. We studied the repeatability of the standard metabolic rate (SMR) and the effect of individual variation in SMR on the subsequent winter survival in a terrestrial shell-bearing mollusc, the white-lipped snail (Cepaea hortensis) in mid-Norway. SMR was measured twice during the autumn and – after an experimental overwintering at controlled conditions...

Registration Year

  • 2022
    16
  • 2021
    26
  • 2020
    42
  • 2019
    20
  • 2018
    30
  • 2017
    20
  • 2016
    25
  • 2015
    16
  • 2014
    13
  • 2013
    15

Resource Types

  • Dataset
    229

Affiliations

  • Norwegian University of Science and Technology
    229
  • Norwegian Institute for Nature Research
    46
  • University of Oslo
    18
  • Norwegian University of Life Sciences
    16
  • Uppsala University
    14
  • University of Helsinki
    13
  • French National Centre for Scientific Research
    12
  • University of Portsmouth
    7
  • Max Planck Institute for Ornithology
    6
  • Swedish University of Agricultural Sciences
    6