27 Works

Data from: Social transmission in the wild reduces predation pressure on novel prey signals

Liisa Hämäläinen, William Hoppitt, Hannah Rowland, Johanna Mappes, Anthony Fulford, Sebastian Sosa & Rose Thorogood
Social transmission of information is taxonomically widespread and could have profound effects on the ecological and evolutionary dynamics of animal communities. Demonstrating this in the wild, however, has been challenging. Here we show by field experiment that social transmission among predators can shape how selection acts on prey defences. Using artificial prey and a novel approach in statistical analyses of social networks, we find that blue tit (Cyanistes caeruleus) and great tit (Parus major) predators...

Multiple-batch spawning as a bet-hedging strategy in highly stochastic environments: an exploratory analysis of Atlantic cod

Sara Hocevar, Jeffrey A. Hutchings & Anna Kuparinen
Stochastic environments shape life-history traits and can promote selection for risk-spreading strategies, such as bet-hedging. Although the strategy has often been hypothesised to exist for various species, empirical tests providing firm evidence have been rare, mainly due to the challenge in tracking fitness across generations. Here, we take a ‘proof of principle’ approach to explore whether the reproductive strategy of multiple-batch spawning constitutes a bet-hedging. We used Atlantic cod (Gadus morhua) as the study species...

Data for: Evolutionary rescue at different rates of environmental change is affected by trade-offs between short-term performance and long-term survival, by Martta Liukkonen, Ilkka Kronholm and Tarmo Ketola

Tarmo Ketola, Martta Liukkonen & Ilkka Kronholm
As climate change accelerates and habitats free from anthropogenic impacts diminish, populations are forced to migrate or to adapt quickly. Evolutionary rescue (ER) is a phenomenon, in which a population is able to avoid extinction through adaptation. ER is considered to be more likely at slower rates of environmental change. However, the effects of correlated characters on evolutionary rescue are seldom explored yet correlated characters could play a major role in ER. We tested how...

Data and code from: Accounting for species interactions is necessary for predicting how arctic arthropod communities respond to climate change

Nerea Abrego, Tomas Roslin, Tea Huotari, Yinqiu Ji, Niels Martin Schmid, Jiaxin Wang, Douglas W. Yu & Otso Ovaskainen
Species interactions are known to structure ecological communities. Still, the influence of climate change on biodiversity has primarily been evaluated by correlating individual species distributions with local climatic descriptors, then extrapolating into future climate scenarios. We ask whether predictions on arctic arthropod response to climate change can be improved by accounting for species interactions. For this, we use a 14-year-long, weekly time series from Greenland, resolved to the species level by mitogenome mapping. During the...

Raw data of nine microsatellite read lengths for 655 Coregonus individuals from 18 populations

Thomas Mehner, Stefan Palm, Bo Delling, Juha Karjalainen & Jolanta Kielpinska
The dataset lists the diploid read lengths for nine microsatellites of 655 individuals of Coregonus fishes (Baltic and Siberian ciscoes, C. albula, C. fontanae, C. lucinensis, C. sardinella plus one C. maraena population) from 18 populations in Germany, Sweden, Finland, Poland and Russia. The nine microsatellites are BWF1, BWF2, Cisco126, Cisco157, Cisco90, Cocl23, Sfo23, Sfo8, Str73.

Variation in parasite resistance of Arctic charr, Salvelinus alpinus, between and within sympatric morphs

Anssi Karvonen, Samantha Beck, Skúli Skúlason, Bjarni Kristjánsson & Camille Leblanc
Genetic variation in resistance against parasite infections is a predominant feature in host-parasite systems. However, mechanisms maintaining genetic polymorphism in resistance in natural host populations are generally poorly known. We explored if differences in natural infection pressure between resource-based morphs of Arctic charr (Salvelinus alpinus) has resulted in differentiation in resistance profiles. We experimentally exposed offspring of two morphs from Lake Þingvallavatn (Iceland), the pelagic planktivorous charr (‘murta’) and the large benthivorous charr (‘kuðungableikja’), to...

Data from: Species interactions, environmental gradients and body size shape population niche width

Antti Eloranta, Anders Finstad, Odd Sandlund, Rune Knudsen, Anna Kuparinen & Per-Arne Amundsen
Competition for shared resources is commonly assumed to restrict population-level niche width of coexisting species. However, the identity and abundance of coexisting species, the prevailing environmental conditions, and the individual body size may shape the effects of interspecific interactions on species’ niche width. Here we study the effects of inter- and intraspecific interactions, lake area and altitude, and fish body size on the trophic niche width and resource use of a generalist predator, the littoral-dwelling...

Hard to catch: experimental evidence supports evasive mimicry

Erika Páez V, Janne K. Valkonnen, Keith R. Willmott, Pável Matos-Maraví, Marianne Elias & Johanna Mappes
Most research on aposematism has focused on chemically defended prey, but the signaling difficulty of capture remains poorly explored. Similar to classical Batesian and Müllerian mimicry related to distastefulness, such ‘evasive aposematism' may also lead to convergence in warning colours, known as evasive mimicry. A prime candidate group for evasive mimicry areAdelphabutterflies, which are agile insects and show remarkable colour pattern convergence. We tested the ability of naive blue tits to learn to avoid and...

Temporary Allee effects among non-stationary recruitment dynamics in depleted gadid and flatfish populations

Maria Tirronen, Tommi Perälä & Anna Kuparinen
We investigated whether low-abundance recruitment dynamics can change in time between compensation and depensation, the latter implying the presence of the Allee effect. For this, we studied the stock-recruitment time series of 17 gadid and flatfish populations in the RAM Legacy Stock Assessment Database using a Bayesian change point model. The recruitment dynamics were represented with the sigmoidal Beverton-Holt and the Saila-Lorda stock-recruitment models, and the parameters of the models were allowed to shift at...

Performing Science: Blurring the Boundaries Among Art, Research, and Academic Communities

Rebekah Rousi

Droplet digital PCR (ddPCR) as a tool for investigating dynamics of cryptic symbionts

Anna-Lotta Hiillos, Anne Thonig & K. Emily Knott
Interactions among symbiotic organisms and their hosts are major drivers of ecological and evolutionary processes. Monitoring the infection patterns among natural populations and identifying factors affecting these interactions is critical for understanding symbiont-host relationships. However, many of these interactions remain understudied since the knowledge about the symbiont species is lacking and hinders the development of appropriate tools. In this study, we developed a digital droplet PCR (ddPCR) assay based on apicomplexan COX1 gene to detect...

A modified niche model for generating food webs with stage-structured consumers: The stabilizing effects of life-history stages on complex food webs

Etsuko Nonaka & Anna Kuparinen
1. Almost all organisms grow in size during their lifetime and switch diets, trophic positions, and interacting partners as they grow. Such ontogenetic development introduces life-history stages and flows of biomass between the stages through growth and reproduction. However, current research on complex food webs rarely considers life-history stages. The few previously proposed methods do not take full advantage of the existing food web structural models that can produce realistic food web topologies. 2. We...

Data from: Traits mediate niches and co-occurrences of forest beetles in ways that differ among bioclimatic regions

Ryan C. Burner, Jörg G. Stephan, Lukas Drag, Tone Birkemoe, Jörg Muller, Tord Snäll, Otso Ovaskainen, Mária Potterf, Juha Siitonen, Olav Skarpaas, Inken Doerfler, Martin M. Gossner, Peter Schall, Wolfgang W. Weisser & Anne Sverdrup-Thygeson
Aim To investigate the role of traits in beetle community assembly and test for consistency in these effects among several bioclimatic regions. We asked (1) whether traits predicted species’ responses to environmental gradients (i.e., their niches), (2) whether these same traits could predict co-occurrence patterns, and (3) how consistent were niches and the role of traits among study regions. Location Boreal forests in Norway and Finland, temperate forests in Germany. Methods We complied capture records...

The impact of life stage and pigment source on the evolution of novel warning signal traits

Carita Lindstedt, Robin Bagley, Sarah Calhim, Mackenzie Jones & Catherine Linnen
Our understanding of how novel warning color traits evolve in natural populations is largely based on studies of reproductive stages and organisms with endogenously produced pigmentation. In these systems, genetic drift is often required for novel alleles to overcome strong purifying selection stemming from frequency-dependent predation and positive assortative mating. Here, we integrate data from field surveys, predation experiments, population genomics, and phenotypic correlations to explain the origin and maintenance of geographic variation in a...

Expansion of rDNA and pericentromere satellite repeats in the genomes of bank voles Myodes glareolus exposed to environmental radionuclides

Toni Jernfors, John Danforth, Jenni Kesäniemi, Anton Lavrinienko, Eugene Tukalenko, Jiří Fajkus, Martina Dvořáčková, Phillip Watts & Tapio Mappes
Altered copy number of certain highly repetitive regions of the genome, such as satellite DNA within heterochromatin and ribosomal RNA loci (rDNA), is hypothesized to help safeguard the genome against damage derived from external stressors. We quantified copy number of the 18S rDNA and a pericentromeric satellite DNA (Msat-160) in bank voles (Myodes glareolus) inhabiting the Chernobyl Exclusion Zone (CEZ), an area that is contaminated by radionuclides and where organisms are exposed to elevated levels...

Data from: Titmice are a better indicator of bird density in Northern European than in Western European forests

Mira H. Kajanus, Jukka T. Forsman, Maximilian G. R. Vollstädt, Vincent Devictor, Merja Elo, Aleksi Lehikoinen, Mikko Mönkkönen, James T. Thorson & Sami M. Kivelä
Population sizes of many birds are declining alarmingly and methods for estimating fluctuations in species’ abundances at a large spatial scale are needed. The possibility to derive indicators from the tendency of specific species to co-occur with others has been overlooked. Here we tested whether the abundance of resident titmice can act as a general ecological indicator of forest bird density in European forests. Titmice species are easily identifiable and have a wide distribution, which...

Performance and microbiota of Lupinus polyphyllus for Plant and Soil

Satu Ramula, Suni Mathew, Aino Kalske, Riitta Nissinen, Kari Saikkonen & Marjo Helander
Purpose: In cold climates, glyphosate residues may linger in soils, with effects on plant-microbe interactions and, consequently, plant performance. Here, we explore the influence of glyphosate residues on the endophytic microbiota (bacteria and fungi) and performance of the perennial nitrogen-fixing weed Lupinus polyphyllus. Methods: In a common garden, we grew plants from six populations of L. polyphyllus in glyphosate-treated or untreated control soils, with or without additional phosphorus. We sampled plant microbiota (leaves, roots, nodules)...

Out in the open: behavior’s effect on predation-risk and thermoregulation by aposematic caterpillars

Matthew Nielsen & Johanna Mappes
Warning coloration should be under strong stabilizing selection but often displays considerable intraspecific variation. Opposing selection on color by predators and temperature is one potential explanation for this seeming paradox. Despite the importance of behavior for both predator avoidance and thermoregulation, its role in mediating selection by predators and temperature on warning coloration has received little attention. Wood tiger moth caterpillars, Arctia plantaginis, have aposematic coloration, an orange patch on the black body. The size...

Biological and chemical quantification of tadpole nurseries (phytotelmata)

Chloe Fouilloux, Shirley Jennifer Serrano-Rojas, Juan David Carvajal-Castro, Janne K. Valkonen, Philippe Gaucher, Marie-Therese Fischer, Andrius Pašukonis & Bibiana Rojas
Many species of Neotropical frogs have evolved to deposit their tadpoles in small water bodies inside plant structures called phytotelmata. These pools are small enough to exclude large predators but have limited nutrients and high desiccation risk. Here, we explore phytotelm use by three common Neotropical species: Osteocephalus oophagus, an arboreal frog that periodically feeds eggs to its tadpoles; Dendrobates tinctorius, a tadpole-transporting poison frog with cannibalistic tadpoles; and Allobates femoralis, a terrestrial tadpole-transporting poison...

R code for: The joint evolution of learning and dispersal maintains intraspecific diversity in metapopulations

Jannis Liedtke & Lutz Fromhage
To get a better understanding of the joint evolution of dispersal tendencies and of cognitive abilities, we built an individual-based simulation. Both learning speed and dispersal tendency were free to evolve. Results show that both positive and negative correlations could evolve between these traits, depending on properties both of local patches and of the metapopulation as a whole. Furthermore, we found that dispersal stabilized the co-existence of different cognitive types in the metapopulation, thereby helping...

Chiral hemicucurbit[8]uril as an anion receptor: selectivity to size, shape and charge distribution

Sandra Kaabel, Jasper Adamson, Filip Topić, Anniina Kiesilä, Elina Kalenius, Mario Öeren, Mart Reimund, Elena Prigorchenko, Aivar Lookene, Hans J. Reich, Kari Rissanen & Riina Aav
Chiral (all-R)-cyclohexanohemicucurbit[8]uril binds anions in a 1 : 1 ratio in pure methanol like a molecular Pac-Man™ with remarkable selectivity based on the size, shape and charge distribution of the anion.

Data from: Does trait-based joint species distribution modelling reveal the signature of competition in stream macroinvertebrate communities?

Merja Elo, Jenny Jyrkänkallio-Mikkola, Otso Ovaskainen, Janne Soininen, Kimmo Tolonen & Jani Heino
1. The occupancy and abundance of species are jointly driven by local factors, such as environmental characteristics and biotic interactions, and regional-scale factors, such as dispersal and climate. Recently, it has been shown that biotic interactions shape species occupancies and abundances beyond local extents. However, for small ectothermic animals, particularly for those occurring in freshwater environments, the importance of biotic interactions remains understudied. Species-to-species associations from joint species distribution models (i.e. species associations while controlling...

Code from: Realistic genetic architecture enables organismal adaptation as predicted under the folk definition of inclusive fitness

Guillermo Garcia-Costoya & Lutz Fromhage
A fundamental task of evolutionary biology is to explain the pervasive impression of organismal design in nature, including traits benefiting kin. Inclusive fitness is considered by many to be a crucial piece in this puzzle, despite ongoing discussion about its scope and limitations. Here we use individual-based simulations to study what quantity (if any) individual organisms become adapted to maximise when genetic architectures are more or less suitable for the presumed main driver of biological...

Multiple paths to cold tolerance: the role of environmental cues, morphological traits and the circadian clock gene vrille

Noora Poikela, Venera Tyukmaeva, Anneli Hoikkala & Maaria Kankare
Background: Tracing the association between insect cold tolerance and latitudinally and locally varying environmental conditions, as well as key morphological traits and molecular mechanisms, is essential for understanding the processes involved in adaptation. We explored these issues in two closely-related species, Drosophila montana and Drosophila flavomontana, originating from diverse climatic locations across several latitudes on the coastal and mountainous regions of North America. We also investigated the association between sequence variation in one of the...

Biotic homogenisation in bird communities leads to large-scale changes in species associations

Stanislas Rigal, Vincent Devictor, Pierre Gaüzère, Sonia Kéfi, Jukka Forsman, Mira Kajanus, Mikko Mönkkönen & Vasilis Dakos
This is the dataset used for the manuscript Biotic homogenisation in bird communities leads to large-scale changes in species associations Aim: The impact of global change on biodiversity is commonly assessed in terms of changes in species distributions, community richness and community composition. Whether and how much associations between species, i.e. the degree of correlation in their spatial co-occurrence, are also changing is much less documented and mostly limited to local studies of ecological networks....

Registration Year

  • 2021

Resource Types

  • Dataset
  • Journal Article


  • University of Jyväskylä
  • University of Helsinki
  • Swedish University of Agricultural Sciences
  • Institut des Sciences de l'Evolution de Montpellier
  • Dalhousie University
  • Natural Resources Institute Finland
  • University of Oulu
  • Hólar University College
  • Centre d'Ecologie Fonctionnelle et Evolutive
  • St. John's University