321 Works

Data from: Stimulus salience as an explanation for imperfect mimicry

Baharan Kazemi, Gabriella Gamberale-Stille, Birgitta S. Tullberg & Olof Leimar
The theory of mimicry explains how a mimic species gains advantage by resembling a model species . Selection for increased mimic-model similarity should then result in accurate mimicry, yet there are many surprising examples of poor mimicry in the natural world. The existence of imperfect mimics remains a major unsolved conundrum. We propose and experimentally test a novel explanation of the phenomenon. We argue that predators perceive prey as having several traits, but the traits...

Data from: A novel method to analyze social transmission in chronologically sequenced assemblages, implemented on cultural inheritance of the art of cooking

Sven Isaksson, Alexander Funcke, Ida Envall, Magnus Enquist & Patrik Lindenfors
Here we present an analytical technique for the measurement and evaluation of changes in chronologically sequenced assemblages. To illustrate the method, we studied the cultural evolution of European cooking as revealed in seven cook books dispersed over the past 800 years. We investigated if changes in the set of commonly used ingredients were mainly gradual or subject to fashion fluctuations. Applying our method to the data from the cook books revealed that overall, there is...

Data from: Selective attention by priming in host search behavior of 2 generalist butterflies

Gabriella Gamberale-Stille, Alexander Schäpers, Niklas Janz & Sören Nylin
In phytophagous insects such as butterflies, there is an evolutionary trend towards specialization in host plant use. One contributing mechanism for this pattern may be found in female host search behavior. Since search attention is limited, generalist females searching for hosts for oviposition may potentially increase their search efficacy by aiming their attention on a single host species at a time, a behavior consistent with search image formation. Using laboratory reared and mated females of...

Data from: Dogs accompanied humans during the Neolithic expansion into Europe

Morgane Ollivier, Anne Tresset, Laurent A. F. Frantz, Stéphanie Brehard, Adrian Bălășescu, Marjan Mashkour, Adina Boroneant, Maud Pionnier-Capitan, Ophelie Lebrasseur, Rose-Marie Arbogast, László Bartosiewicz, Karyne Debue, Rivka Rabinovich, Mikhail V. Sablin, Greger Larson, Catherine Hänni, Christophe Hitte & Jean-Denis Vigne
Near Eastern Neolithic farmers introduced several species of domestic plants and animals as they dispersed into Europe. Dogs were the only domestic species present in both Europe and the Near East prior to the Neolithic. Here, we assessed whether early Near Eastern dogs possessed a unique mitochondrial lineage that differentiated them from Mesolithic European populations. We then analysed mitochondrial DNA sequences from 99 ancient European and Near-Eastern dogs spanning the Upper Palaeolithic to the Bronze...

Spatial variation in human disturbances and their effects on forest structure and biodiversity across an Afromontane forest

Dinkissa Beche, Ayco J.M. Tack, Sileshi Nemomissa, Bikila Warkineh, Debissa Lemessa, Patricia Rodrigues, Joern Fischer & Kristoffer Hylander
Context Human disturbances can have large impacts on forest structure and biodiversity, and thereby result in forest degradation, a property difficult to detect by remote sensing. Objectives To investigate spatial variation in anthropogenicdisturbances and their effects on forest structure and biodiversity. Methods In 144 plots of 20 x 20 m distributed across a forest area of 750 km2 in Southwest Ethiopia, we recorded: landscape variables (e.g., distance to forest edge), different human disturbances, forest structure...

Data: Interactive effects of drought and edge exposure on old-growth forest understory species

Irena Koelemeijer
Context: Both climatic extremes and land-use change constitute severe threats to biodiversity, but their interactive effects remain poorly understood. In forest ecosystems, the effects of climatic extremes can be exacerbated at forest edges. Objectives: We explore the hypothesis that an extreme summer drought reduced the richness and coverage of old-growth forest species, particularly in forest patches with high edge exposure. Methods: Using a high-resolution spatially explicit precipitation dataset, we could detect variability in drought intensity...

Within-population sperm competition intensity does not predict asymmetry in conpopulation sperm precedence

Martin Garlovsky, Leeban Yusuf, Mike Ritchie Ritchie, Rhonda Snook, Martin D. Garlovsky, Leeban H. Yusuf, Michael G. Ritchie & Rhonda R. Snook
Postcopulatory sexual selection can generate evolutionary arms races between the sexes resulting in the rapid coevolution of reproductive phenotypes. As traits affecting fertilization success diverge between populations, postmating prezygotic (PMPZ) barriers to gene flow may evolve. Conspecific sperm precedence is a form of PMPZ isolation thought to evolve early during speciation yet has mostly been studied between species. Here , we show conpopulation sperm precedence (CpSP) between Drosophila montana populations. Using Pool-seq genomic data we...

Data from: Repeated evidence that the accelerated evolution of sperm is associated with their fertilization function

John Fitzpatrick, Daisy Bridge & Rhonda Snook
Spermatozoa are the most morphologically diverse cell type, leading to the widespread assumption that they evolve rapidly. However, there is no direct evidence that sperm evolve faster than other male traits. Such a test requires comparing male traits that operate in the same selective environment, ideally produced from the same tissue, yet vary in function. Here we examine rates of phenotypic evolution in sperm morphology using two insect groups where males produce fertile and non-fertile...

Data from: No link between nymph and adult colouration in shield bugs: weak selection by predators

Iliana Medina, Regina Vega-Trejo, Thomas Wallenius, Damien Esquerre, Constanza Leon, Daniela Perez & Megan Head
Many organisms use different anti-predator strategies throughout their life, but little is known about the reasons or implications of such changes. For years it has been suggested that selection by predators should favour uniformity in local warning signals. If this is the case, we would expect high resemblance in colour across life stages in aposematic animals where young and adults share similar morphology and habitat. In this study we used shield bugs (Hemiptera: Pentatomoidea) to...

Data from: Adaptation potential of the copepod Eurytemora affinis to a future warmer Baltic Sea

Konrad Karlsson & Monika Winder
To predict effects of global change on zooplankton populations, it is important to understand how present species adapt to temperature and how they respond to stressors interacting with temperature. Here we ask if the calanoid copepod Eurytemora affinis from the Baltic Sea can adapt to future climate warming. Populations were sampled at sites with different temperatures. Full sibling families were reared in the lab and used in two common garden experiments (1) populations crossed over...

Contrasting altitudinal variation of alpine plant communities along the Swedish mountains

Johannes Måsviken, Fredrik Dalerum & Sara Cousins
Changes in abiotic factors along altitudinal and latitudinal gradients cause powerful environmental gradients. The topography of alpine areas generates environmental gradients over short distances, and alpine areas are expected to experience greater temperature increase compared to the global average. In this study, we investigate alpha, beta and gamma diversity, as well as community structure, of vascular plant communities along altitudinal gradients at three latitudes in the Swedish mountains. Species richness and evenness decreased with altitude...

Data from: Combining experimental evolution and genomics to understand how seed beetles adapt to a marginal host plant

Zachariah Gompert, Alexandre Rego, Samridhi Chaturvedi, Alexandra Lish, Caroline Barton, Karen Kapheim & Frank Messina
Genes that affect adaptive traits have been identified, but our knowledge of the genetic basis of adaptation in a more general sense (across multiple traits) remains limited. We combined population-genomic analyses of evolve and resequence experiments, genome-wide association mapping of performance traits, and analyses of gene expression to fill this knowledge gap, and shed light on the genomics of adaptation to a marginal host (lentil) by the seed beetle Callosobruchus maculatus. Using population-genomic approaches, we...

Balancing selection in Pattern Recognition Receptor signalling pathways is associated with gene function and pleiotropy in a wild rodent

Lars Råberg, Max Lundberg, Xiuqin Zhong, Anna Konrad & Remi-André Olsen
Pathogen-mediated balancing selection is commonly considered to play an important role in the maintenance of genetic diversity, in particular in immune genes. However, there has not been any systematic analysis of what factors influence which immune genes are the targets of such selection. To address this, we here focus on Pattern Recognition Receptor (PRR) signalling pathways, which play a key role in innate immunity. We used whole-genome resequencing data from a population of bank voles...

Data from: Brain size does not predict learning strategies in a serial reversal learning test

Annika Boussard, Séverine Buechel, Mirjam Amcoff, Alexander Kotrschal & Niclas Kolm
Reversal learning assays are commonly used across a wide range of taxa to investigate associative learning and behavioural flexibility. In serial reversal learning, the reward contingency in a binary discrimination is reversed multiple times. Performance during serial reversal learning varies greatly at the interspecific level, as some animals adapt a rule-based strategy that enables them to switch quickly between reward contingencies. Enhanced learning ability and increased behavioural flexibility generated by a larger relative brain size...

Genomic and fitness consequences of inbreeding in an endangered carnivore

Malin Hasselgren, Nicolas Dussex, Johanna Von Seth, Anders Angerbjörn, Remi-André Olsen, Love Dalén & Karin Noren
Reduced fitness through genetic drift and inbreeding is a major threat to small and isolated populations. Although previous studies have generally used genetically verified pedigrees to document effects of inbreeding and gene flow, these often fail to capture the whole inbreeding history of the species. By assembling a draft arctic fox (Vulpes lagopus) genome and re-sequencing complete genomes of 23 additional foxes born before and after a well-documented immigration event in Scandinavia, we here look...

Does brain size affect mate choice? An experimental examination in pygmy halfbeaks

Rebecca McNeil, John Fitzpatrick, Alessandro Devigili & Niclas Kolm
This dataset allows for an examination into the repeatability between external and internal brain measurements in pygmy halfbeaks and the repeatability between observers of external measurements (part 1). It also allows an examination of whether mate choice is affected by female brain size and the difference in sexual ornamentation between two males when a female is choosing in a dichotomous choice chamber, using both categorical and continuous variables (part 2). The code allows for these...

Convergence of undulatory swimming kinematics across a diversity of fishes

Elsa Goerig, Valentina Di Santo, Dylan K. Wainwright, Theodore Castro-Santos, James Liao, Otar Akanyeti & George Lauder
Fishes exhibit an astounding diversity of locomotor behaviors, from classic swimming with their body and fins to jumping, flying, walking, and burrowing. Fishes that use their body and caudal fin (BCF) during undulatory swimming have been traditionally divided into modes based on the length of the propulsive body wave and the ratio of head:tail oscillation amplitude: anguilliform, sub-carangiform, carangiform and thunniform. This classification was first proposed based on key morphological traits, such as body stiffness...

Climate warming dominates over plant genotype in shaping the seasonal trajectory of foliar fungal communities on oak

Maria Faticov
Leaves interact with a wealth of microorganisms. Among these, fungi are highly diverse, and are known to contribute to plant health, leaf senescence and early decomposition. However, patterns and drivers of the seasonal dynamics of foliar fungal communities are poorly understood. We used a multi-factorial experiment to investigate the influence of warming and tree genotype on the foliar fungal community on the pedunculate oak Quercus robur across one growing season. Fungal species richness increased, evenness...

The genome of Draba nivalis shows signatures of adaptation to the extreme environmental stresses of the Arctic

Michael Nowak, Siri Birkeland, Terezie Mandáková, Rimjhim Roy Choudhury, Xinyi Guo, Lovisa Gustafsson, Abel Gizaw, Audun Schrøder-Nielsen, Marco Fracassetti, Anne Brysting, Loren Rieseberg, Tanja Slotte, Christian Parisod, Martin Lysak & Christian Brochmann
The Arctic is one of the most extreme terrestrial environments on the planet. Here we present the first complete genome assembly of a plant adapted to the high Arctic, Draba nivalis (Brassicaceae), an attractive model species for studying plant adaptation to the stresses imposed by this harsh environment. We used an iterative scaffolding strategy with data from short-reads, single-molecule long reads, proximity ligation data, and a genetic map to produce a 302 Mb assembly that...

Repeatability and heritability of social reaction norms in a wild agamid lizard

Kasha Strickland, David Mitchell, Coralie Delmé & Celine Frère
In the evolutionary transition from solitary to group living, it should be adaptive for animals to respond to the environment and choose when to socialise to reduce conflict and maximise access to resources. Due to the associated proximate mechanisms (e.g. neural network, endocrine system), it is likely that this behaviour varies between individuals according to genetic and non-genetic factors. We used long-term behavioural and genetic data from a population of eastern water dragons (Intellagama lesueurii)...

Raw data: Local habitat factors and spatial connectivity jointly shape an urban insect community

Anna Barr, Laura Van Dijk, Kristoffer Hylander & Ayco Tack
As the world becomes more and more urbanized, it is increasingly important to understand the impacts of urban landscapes on biodiversity. Urbanization can change local habitat factors and decrease connectivity among local habitats, with major impacts on the structure of natural food webs. However, most studies have focused on single species, or compared rural to urban habitats, which do not inform us on how to design and manage cities to optimize biodiversity. To understand the...

Projected climate risk of aquatic food system benefits

Michelle Tigchelaar, William Cheung, Essam Mohammed, Michael Phillips, Hanna Payne, Elizabeth Selig, Colette Wabnitz, Muhammed Oyinlola, Thomas Frölicher, Jessica Gephart, Christopher Golden, Edward Allison, Abigail Bennett, Ling Cao, Jessica Fanzo, Benjamin Halpern, Fiorenza Micheli, Rosamond Naylor, Rashid Sumaila, Alessandro Tagliabue & Max Troell
Aquatic foods from marine and freshwater systems are critical to the nutrition, health, livelihoods, economies and culture of billions of people worldwide – but climate-related hazards may compromise their ability to provide these benefits. This analysis estimates national-level aquatic food system climate risk using a fuzzy logic modeling approach that connects climate hazards impacting marine and freshwater capture fisheries and aquaculture to their contributions to sustainable food system outcomes, and vulnerability to losing those contributions....

Warm range margin of boreal bryophytes and lichens not directly limited by temperatures

Caroline Greiser, Johan Ehrlén, Miska Luoto, Eric Meineri, Sonia Merinero, Benny Willman & Kristoffer Hylander
1. Species at their warm range margin are potentially threatened by higher temperatures, but may persist in microrefugia. Whether such microsites occur due to more suitable microclimate or due to lower biotic pressure from e.g. competitive species, is still not fully resolved. 2. We examined whether boreal bryophytes and lichens show signs of direct climate limitation, i.e. whether they perform better in cold and/or humid microclimates at their warm range margin. We transplanted a moss,...

Data for: Relative abundance of nitrogen cycling microbes in coral holobionts reflects environmental nitrate availability

Arjen Tilstra, Florian Roth, Yusuf El-Khaled, Claudia Pogoreutz, Nils Rädecker, Christian Wild & Christian Voolstra
Recent research suggests that nitrogen (N) cycling microbes are important for coral holobiont functioning. In particular, coral holobionts may acquire bioavailable N via prokaryotic dinitrogen (N2) fixation or remove excess N via denitrification activity. However, our understanding of environmental drivers on these processes in hospite remains limited. Employing the strong seasonality of the central Red Sea, this study assessed the effects of environmental parameters on the proportional abundances of N cycling microbes associated with the...

Innate preference hierarchies coupled with adult experience, rather than larval imprinting or transgenerational acclimation, determine host plant use in Pieris rapae

Hampus Petrén, Gabriele Gloder, Diana Posledovich, Christer Wiklund & Magne Friberg
The evolution of host range drives diversification in phytophagous insects, and understanding the female oviposition choices is pivotal for understanding host specialization. One controversial mechanism for female host choice is Hopkins’ host selection principle, where females are predicted to increase their preference for the host species they were feeding upon as larvae. A recent hypothesis posits that such larval imprinting is especially adaptive in combination with anticipatory transgenerational acclimation, so that females both allocate and...

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  • Stockholm University
  • Swedish University of Agricultural Sciences
  • Uppsala University
  • University of Helsinki
  • Lund University
  • Linköping University
  • University of Tartu
  • Karolinska Institute
  • Swedish Museum of Natural History
  • Ghent University