21 Works

Data from: Exploring the impact of multidecadal environmental changes on the population genetic structure of a marine primary producer

Nina Lundholm, Sofia Ribeiro, Anna Godhe, Lene Rostgaard Nielsen & Marianne Ellegaard
Many marine protists form resting stages that can remain viable in coastal sediments for several decades. Their long-term survival offers the possibility to explore the impact of changes in environmental conditions on population dynamics over multidecadal time scales. Resting stages of the phototrophic dinoflagellate Pentapharsodinium dalei were isolated and germinated from five layers in dated sediment cores from Koljö fjord, Sweden, spanning ca. 1910–2006. This fjord has, during the last century, experienced environmental fluctuations linked...

Data from: Widespread hybridization within mound-building wood ants in Southern Finland results in cytonuclear mismatches and potential for sex-specific hybrid breakdown

Jack Beresford, Marianne Elias, Lucy Pluckrose, Liselotte Sundström, Roger K. Butlin, Pekka Pamilo & Jonna Kulmuni
Hybridization and gene flow between diverging lineages is increasingly recognized as a common evolutionary process and its consequences can vary from hybrid breakdown to adaptive introgression. We have previously found a population of wood ant hybrids between Formica aquilonia and F. polyctena that shows antagonistic effects of hybridization: females with introgressed alleles show hybrid vigour, whereas males with the same alleles show hybrid breakdown. Here we investigate whether hybridization is a general phenomenon in this...

Data from: Interpreting the genomic landscape of speciation: a road map for finding barriers to gene flow

Mark Ravinet, Rui Faria, Roger K. Butlin, Juan Galindo, Nicolas Bierne, Marina Rafajlović, Mohamed A. F. Noor, Bernhard Mehlig & Anja M. Westram
Speciation, the evolution of reproductive isolation amongst populations, is continuous, complex, and involves multiple, interacting barriers. Until it is complete, the effects of this process vary along the genome and can lead to a heterogeneous genomic landscape with peaks and troughs of differentiation and divergence. When gene flow occurs during speciation, barriers restricting migration locally in the genome lead to patterns of heterogeneity. However, genomic heterogeneity can also be produced or modified by variation in...

Data from: Estimating age-dependent extinction: contrasting evidence from fossils and phylogenies

Oskar Hagen, Tobias Andermann, Tiago B. Quental, Alexandre Antonelli & Daniele Silvestro
The estimation of diversification rates is one of the most vividly debated topics in modern systematics, with considerable controversy surrounding the power of phylogenetic and fossil-based approaches in estimating extinction. Van Valen’s seminal work from 1973 proposed the “Law of constant extinction” which states that the probability of extinction of taxa is not dependent on their age. This assumption of age-independent extinction has prevailed for decades with its assessment based on survivorship curves, which, however,...

Data from: Genome architecture enables local adaptation of Atlantic cod despite high connectivity

Julia M. I. Barth, Paul R. Berg, Per R. Jonsson, Sara Bonanomi, Hanna Corell, Jakob Hemmer-Hansen, Kjetill S. Jakobsen, Kerstin Johannesson, Per Erik Jorde, Halvor Knutsen, Per-Olav Moksnes, Bastiaan Star, Nils Chr. Stenseth, Henrik Svedäng, Sissel Jentoft & Carl André
Adaptation to local conditions is a fundamental process in evolution; however, mechanisms maintaining local adaptation despite high gene flow are still poorly understood. Marine ecosystems provide a wide array of diverse habitats that frequently promote ecological adaptation even in species characterized by strong levels of gene flow. As one example, populations of the marine fish Atlantic cod (Gadus morhua) are highly connected due to immense dispersal capabilities but nevertheless show local adaptation in several key...

Data from: Form–function relationships in a marine foundation species depend on scale: a shoot to global perspective from a distributed ecological experiment

Jennifer L. Ruesink, John J. Stachowicz, Pamela L. Reynolds, Christoffer Boström, Mathieu Cusson, James Douglass, Johan Eklöf, Aschwin H. Engelen, Masakazu Hori, Kevin Hovel, Katrin Iken, Per-Olav Moksnes, Masahiro Nakaoka, Mary I. O'Connor, Jeanine L. Olsen, Erik E. Sotka, Matthew A. Whalen & Emmett J. Duffy
Form-function relationships in plants underlie their ecosystem roles in supporting higher trophic levels through primary production, detrital pathways, and habitat provision. For widespread, phenotypically-variable plants, productivity may differ not only across abiotic conditions, but also from distinct morphological or demographic traits. A single foundation species, eelgrass (Zostera marina), typically dominates north temperate seagrass meadows, which we studied across 14 sites spanning 32-61° N latitude and two ocean basins. Body size varied by nearly two orders...

Data from: Seascape genetics and biophysical connectivity modelling support conservation of the seagrass Zostera marina in the Skagerrak-Kattegat region of the eastern North Sea

Marlene Jahnke, Per R. Jonsson, Per-Olav Moksnes, Lars-Ove Loo, Martin Nilsson Jacobi & Jeanine L. Olsen
Maintaining and enabling evolutionary processes within meta-populations is critical to resistance, resilience and adaptive potential. Knowledge about which populations act as sources or sinks, and the direction of gene flow, can help to focus conservation efforts more effectively and forecast how populations might respond to future anthropogenic and environmental pressures. As a foundation species and habitat provider, Zostera marina (eelgrass) is of critical importance to ecosystem functions including fisheries. Here we estimate connectivity of Z....

Data from: Carbon stocks and dynamics at different successional stages in an Afromontane tropical forest

Brigitte Nyirambangutse, Etienne Zibera, Félicien K. Uwizeye, Donat Nsabimana, Elias Bizuru, Håkan Pleijel, Johan Uddling & Göran Wallin
As a result of different types of disturbance, forests are a mixture of stands at different stages of ecological succession. Successional stage is likely to influence forest productivity and carbon storage, linking the degree of forest disturbance to the global carbon cycle and climate. Although tropical montane forests are an important part of tropical forest ecosystems (c. 8 %, elevation > 1000 m a.s.l.), there are still significant knowledge gaps regarding the carbon dynamics and...

Data from: Phylogenomic analyses of Crassiclitellata support major Northern and Southern Hemisphere clades and a Pangaean origin for earthworms

Frank Anderson, Bronwyn Waller Williams, Kevin H. Horn, Christer Erséus, Kenneth M. Halanych, Scott R. Santos & Samuel W. James
Background: Earthworms (Crassiclitellata) are a diverse group of annelids of substantial ecological and economic importance. Earthworms are primarily terrestrial infaunal animals, and as such are probably rather poor natural dispersers. Therefore, the near global distribution of earthworms reflects an old and likely complex evolutionary history. Despite a long-standing interest in Crassiclitellata, relationships among and within major clades remain unresolved. Methods: In this study, we evaluate crassiclitellate phylogenetic relationships using 38 new transcriptomes in combination with...

Data from: Is telomere length associated with mate choice in a songbird with a high rate of extra-pair paternity?

Arild Johnsen, Angela Pauliny, Jan T. Lifjeld & Donald Blomqvist
Telomere length is related to aging in many eukaryotes and the rate of telomere attrition has been suggested to reflect individual genetic quality. Telomere length could thus have implications for mate choice. We investigated telomere length variation in bluethroat Luscinia svecica families with mixed paternity, including social parents, extra-pair fathers and nestlings, testing whether telomere length is associated with social and/or extra-pair mate choice through assortative mating or selection of mates with relatively long telomeres....

Data from: Intestinal Ralstonia pickettii augments glucose intolerance in obesity

Shanthadevi Udayappan, Petia Kovatcheva-Datchary, Guido Bakker, Stefan Havik, Hilde Herrema, Patrice Cani, Kristien Bouter, Clara Belzer, Julia J. Witjes, Anne Vrieze, Eleonore Susanne Victoria De Sonnaville, Alice Chaplin, Daniel Van Raalte, Steven Aalvink, Geesje Dallinga-Thie, Hans Heilig, Goran Bergstrom, Suzan Van Der Meij, Bart Van Wagensveld, Joost Hoekstra, Frits Holleman, Erik Stroes, Albert Groen, Fredrik Backhed, Willem De Vos … & Daniel H. Van Raalte
An altered intestinal microbiota composition has been implicated in the pathogenesis of metabolic disease including obesity and type 2 diabetes mellitus (T2DM). Low grade inflammation, potentially initiated by the intestinal microbiota, has been suggested to be a driving force in the development of insulin resistance in obesity. Here, we report that bacterial DNA is present in mesenteric adipose tissue of obese but otherwise healthy human subjects. Pyrosequencing of bacterial 16S rRNA genes revealed that DNA...

Data from: A genomic footprint of hybrid zone movement in crested newts

Ben Wielstra, Terry Burke, Roger K. Butlin, Aziz Avcı, Nazan Üzüm, Emin Bozkurt, Kurtuluş Olgun & Jan W. Arntzen
Speciation typically involves a stage in which species can still exchange genetic material. Interspecific gene flow is facilitated by the hybrid zones that such species establish upon secondary contact. If one member of a hybridizing species pair displaces the other, their hybrid zone would move across the landscape. Although theory predicts that moving hybrid zones quickly stagnate, hybrid zones tracked over one or a few decades do not always follow such a limitation. This suggests...

Data from: The genetics of mate preferences in hybrids between two young and sympatric Lake Victoria cichlid species

Ola Svensson, Katie Woodhouse, Cock Van Oosterhout, Alan Smith, George F. Turner & Ole Seehausen
The genetic architecture of mate preferences is likely to affect significant evolutionary processes, including speciation and hybridization. Here, we investigate laboratory hybrids between a pair of sympatric Lake Victoria cichlid fish species that appear to have recently evolved from a hybrid population between similar predecessor species. The species demonstrate strong assortative mating in the laboratory, associated with divergent male breeding coloration (red dorsum versus blue). We show in a common garden experiment, using DNA-based paternity...

Data from: Immigrant reproductive dysfunction facilitates ecological speciation

Ola Svensson, Johanna Gräns, Malin C. Celander, Jonathan Havenhand, Erica H. Leder, Kai Lindström, Sofie Schöld, Cock Van Oosterhout & Charlotta Kvarnemo
The distributions of species are not only determined by where they can survive – they must also be able to reproduce. Although immigrant inviability is a well-established concept, the fact that immigrants also need to be able to effectively reproduce in foreign environments has not been fully appreciated in the study of adaptive divergence and speciation. Fertilization and reproduction are sensitive life history stages that could be detrimentally affected for immigrants in non-native habitats. We...

Data from: Ancient DNA reveals the Arctic origin of Viking Age cod from Haithabu, Germany

Bastiaan Star, Sanne Boessenkool, Agata T. Gondek, Elena A. Nikulina, Anne Karin Hufthammer, Christophe Pampoelie, Halvor Knutsen, Carl Andre, Heidi M. Nistelberger, Jan Dierking, Christoph Petereit, Dirk Heinrich, Kjetill S. Jakobsen, Nils Chr. Stenseth, Sissel Jentoft & James H. Barrett
Knowledge of the range and chronology of historic trade and long-distance transport of natural resources is essential for determining the impacts of past human activities on marine environments. However, the specific biological sources of imported fauna are often difficult to identify, in particular if species have a wide spatial distribution and lack clear osteological or isotopic differentiation between populations. Here, we report that ancient fish-bone remains, despite being porous, brittle, and light, provide an excellent...

Data from: Neutral processes forming large clones during colonization of new areas

Marina Rafajlovic, David Kleinhans, Christian Gulliksson, Johan Fries, Daniel Johansson, Angelica Ardehed, Lisa Sundqvist, Ricardo T. Pereyra, Bernhard Mehlig, Per R. Jonsson & Kerstin Johannesson
In species reproducing both sexually and asexually clones are often more common in recently established populations. Earlier studies have suggested that this pattern arises due to natural selection favouring generally or locally successful genotypes in new environments. Alternatively, as we show here, this pattern may result from neutral processes during species’ range expansions. We model a dioecious species expanding into a new area in which all individuals are capable of both sexual and asexual reproduction,...

Data from: Seasonal shifts along the oviparity-viviparity continuum in a cold-climate lizard population

Richard Shine, Erik Wapstra & Mats Olsson
Because squamate embryos require weeks of high temperature to complete development, cool climatic areas are dominated by viviparous taxa (in which gravid females can sun-bask to keep embryos warm) rather than oviparous taxa (which rely on warm soil to incubate their eggs). How, then, can some oviparous taxa reproduce successfully in cool climates – especially late in summer, when soil temperatures are falling? Near the northern limit of their distribution (in Sweden), sand lizards (Lacerta...

Data from: Polygamy slows down population divergence in shorebirds

Josephine D'Urban Jackson, Natalie Dos Remedios, Kathryn H. Maher, Sama Zefania, Susan Haig, Sara Oyler-McCance, Donald Blomqvist, Terry Burke, Mike W. Bruford, Tamas Szekely, Clemens Küpper & Michael W. Bruford
Sexual selection may act as a promotor of speciation since divergent mate choice and competition for mates can rapidly lead to reproductive isolation. Alternatively, sexual selection may also retard speciation since polygamous individuals can access additional mates by increased breeding dispersal. High breeding dispersal should hence increase gene flow and reduce diversification in polygamous species. Here we test how polygamy predicts diversification in shorebirds using genetic differentiation and subspecies richness as proxies for population divergence....

Data from: Frugivory-related traits promote speciation of tropical palms

Renske E. Onstein, William J. Baker, Thomas L. P. Couvreur, Søren Faurby, Jens-Christian Svenning & W. Daniel Kissling
Animal-mediated seed dispersal by frugivorous birds and mammals is central to the ecology and functioning of ecosystems, but whether and how frugivory-related traits have affected plant speciation remains little explored. Fruit size is directly linked to plant dispersal capacity and therefore influences gene flow and genetic divergence of plant populations. Using a global species-level phylogeny with comprehensive data on fruit sizes and plant species distributions, we test whether fruit size has affected speciation rates of...

Data from: Learning from the past to prepare for the future: felids face continued threat from declining prey richness

Christopher James Sandom, Soren Faurby, Jens C. Svenning, Dawn Burnham, Amy Dickman, Amy Hinks, Ewan A. Macdonald, Bill Ripple, Jake Williams, David Macdonald, W. J. Ripple, J.-C. Svenning, A. E. Hinks & D. W. Macdonald
Many contemporary species of large-felids (>15 kg) feed upon prey that are endangered, raising concern that prey population declines (defaunation) will further threaten felids. We assess the threat that defaunation presents by investigating a late Quaternary (LQ), ‘present-natural’ counterfactual scenario. Our present-natural counterfactual is based on predicted ranges of mammals today in the absence of any impacts of modern humans (Homo sapiens) through time. Data from our present-natural counterfactual are used to understand firstly how...

Data from: Cephalic phase of insulin secretion in response to a meal is unrelated to family history of Type 2 diabetes

Bjorn Eliasson, Araz Rawshani, Mette Axelsen, Ann Hammarstedt & Ulf Smith
The pre-absorptive cephalic phase of insulin secretion is elicited during the first ten min of a meal and before glucose levels rise. Its importance for insulin release during the post-absorptive phase has been well documented in animals but its presence or importance in man has become increasingly controversial. We here examined the presence of an early cephalic phase of insulin release in 31 well matched individuals without (n=15) or with (n=16) a known family history...

Registration Year

  • 2017

Resource Types

  • Dataset


  • University of Gothenburg
  • University of Oslo
  • University of Sheffield
  • University of Groningen
  • University of California System
  • Aarhus University
  • University of East Anglia
  • Institute of Marine Science
  • University of Copenhagen
  • University of Helsinki