75 Works

Data from: Seasonality determines patterns of growth and age structure over a geographic gradient in an ectothermic vertebrate

Juha Merilä, Mårten B. Hjernquist, Fredrik Söderman, K. Ingemar Jönsson, Gábor Herczeg & Anssi Laurila
Environmental variation connected with sea- sonality is likely to affect the evolution of life-history strategies in ectotherms, but there is no consensus as to how important life-history traits like body size are influ- enced by environmental variation along seasonal gradients. We compared adult body size, skeletal growth, mean age, age at first reproduction and longevity among 11 common frog (Rana temporaria) populations sampled along a 1,600-km-long latitudinal gradient across Scandinavia. Mean age, age at first...

Threats from the air: damselfly predation on diverse prey taxa

Eero J. Vesterinen, Kari Kaunisto, , Mark Forbes, Andre Morrill, Anna Puisto, Ilari Sääksjärvi & Thomas Lilley
1. To understand the diversity and strength of predation in natural communities, researchers must quantify the total amount of prey species in the diet of predators. Metabarcoding approaches have allowed widespread characterization of predator diets with high taxonomic resolution. To determine the wider impacts of predators, researchers should combine DNA techniques with estimates of population size of predators using mark-release-recapture (MRR) methods, and with accurate metrics of food consumption by individuals. 2. Herein, we estimate...

Data from: Thermal tolerance in two wood ant species and their hybrids

Elisa Nygård, Pierre Nouhaud, Raphael Martin-Roy & Jonna Kulmuni
Local populations can cope with rising temperatures, if they have adaptive potential to face the new thermal regime. Hybridization with a closely related lineage is one potential source of adaptive genetic variability and an outstanding question is whether hybridization could help contemporary populations to adapt in the face of current environmental change. We investigate thermal adaptation by testing for differences in cold and heat tolerances between Finnish populations of two mound-building wood ants, Formica polyctena...

Genomic signatures of domestication in Old World camels

Robert Fitak, Elmira Mohandesan, Jukka Corander, Adiya Yadamsuren, Battsetseg Chuluunbat, Omer Abdelhadi, Abdul Raziq, Peter Nagy, Chris Walzer, Bernard Faye & Pamela Burger
Domestication begins with the selection of animals showing less fear of humans. In most domesticates, selection signals for tameness have been superimposed by intensive breeding for economical or other desirable traits. Old World camels, conversely, have maintained high genetic variation and lack these secondary bottlenecks associated with breed development. By re-sequencing multiple genomes from dromedaries, Bactrian camels, and their endangered wild relatives, we show that positive selection for candidate genes underlying traits collectively referred to...

Data for: Temperature-mediated male condition shapes female fitness and oviposition preference in a butterfly

Elena Rosa
Habitat choice by ovipositing females critically shapes fitness in species lacking parental care. We aimed at manipulating female oviposition choosiness using the Glanville fritillary butterfly (Melitaea cinxia) as study species. We tested whether female choosiness is influenced by individual condition and/or that of the mating partner, which was manipulated experimentally by subjecting adults to night temperatures warmer than usual. Against our prediction, female life expectancy was not altered by the treatment and impacted her fitness...

Data from: Effects of ambient temperatures on evolutionary potential of reproductive timing in boreal passerines

Emma Vatka, Markku Orell, Seppo Rytkönen & Juha Merilä
1. Many populations need to adapt to changing environmental conditions, such as warming climate. Changing conditions generate directional selection for traits critical for fitness. For evolutionary responses to occur, these traits need to be heritable. However, changes in environmental conditions can alter the amount of heritable variation a population expresses, making predictions about expected responses difficult. 2. The aim of this study was to evaluate the effects of ambient temperatures on evolutionary potential and strength...

Data from: An analysis of travel reports of the Finnish botanical expeditions to Russian Lapland (Murmansk Region and Northern Karelia) in 1861 and 1863

Alexander Sennikov & Mikhail Kozhin
Finnish botanical expeditions, which were made to Russian Lapland (present-day Murmansk Region and northern Karelia, Russia) in 1861 and 1863, published travel reports with preliminary information, which contained numerous floristic novelties and phytogeographical observations but have been overlooked in present-day studies. Two reports appeared in print, by Gustav Selin on the expedition made in 1861, and by Nils Isak Fellman on the expedition made in 1863. We analysed mentions of vascular plant species published in...

Clustering of loci controlling species differences in male chemical bouquets of sympatric Heliconius butterflies

Kelsey Byers, Kathy Darragh, Sylvia Fernanda Garza, Diana Abondano Almeida, Ian Warren, Pasi Rastas, Richard Merrill, Stefan Schulz, W. Owen McMillan & Chris Jiggins
The degree to which loci promoting reproductive isolation cluster in the genome – i.e. the genetic architecture of reproductive isolation - can influence the tempo and mode of speciation. Tight linkage between these loci can facilitate speciation in the face of gene flow. Pheromones play a role in reproductive isolation in many Lepidoptera species, and the role of endogenously-produced compounds as secondary metabolites decreases the likelihood of pleiotropy associated with many barrier loci. Heliconius butterflies...

Predator community and resource use jointly modulate the inducible defense response in body height of crucian carp

Ilaria De Meo, Kjartan Østbye, Kimmo Kahilainen, Brian Hayden, Christian Fagertun & Antonio Poléo
Phenotypic plasticity can be expressed as changes in body shape in response to environmental variability. Crucian carp (Carassius carassius), a widespread cyprinid, displays remarkable plasticity in body morphology and increases body depth when exposed to cues from predators, suggesting the triggering of an anti-predator defense mechanism. However, these morphological changes could also be related to resource use and foraging behavior, as an indirect effect of predator presence. In order to determine whether phenotypic plasticity in...

The roles of climate, geography and natural selection as drivers of genetic and phenotypic differentiation in a widespread amphibian Hyla annectans (Anura: Hylidae)

Shichao Wei, Zitong Li, Paolo Momigliano, Chao Fu, Hua Wu & Juha Merilä
The role of geological events and Pleistocene climatic fluctuations as drivers of current patterns of genetic variation in extant species has been a topic of continued interest among evolutionary biologists. Nevertheless, comprehensive studies of widely distributed species are still rare, especially from Asia. Using geographically extensive sampling of many individuals and a large number of nuclear single nucleotide polymorphisms (SNPs), we studied the phylogeography and historical demography of Hyla annectans populations in southern China. Thirty-five...

A brain and a head for a different habitat: size variation in four morphs of Arctic charr (Salvelinus alpinus (L.)) in a deep oligotrophic lake

Ana Peris, Olivier Devineau, Kim Præbel, Kimmo K. Kahilainen & Kjartan Østbye
Adaptive radiation is the diversification of species to different ecological niches and has repeatedly occurred in different salmonid fish of postglacial lakes. In Lake Tinnsjøen, one of the largest and deepest lakes in Norway, the salmonid fish, Arctic charr (Salvelinus alpinus (L.)), has likely radiated within 9700 years after deglaciation into ecologically and genetically segregated Piscivore, Planktivore, Dwarf and Abyssal morphs in the pelagial, littoral, shallow-moderate profundal and deep-profundal habitats. We compared trait variation in...

Supplementary material for: Exploring the impact of unstable terminals on branch support values in paleontological data

Jorge R Flores, Samuli Lehtonen & Jaakko Hyvönen
The dataset consists of a PDF file and two plain-text TNT scripts (*.run files). The PDF includes supporting Figures for the additional analyses conducted by Flores et al. on paleontological datasets. The TNT scripts conduct two complementary sets of analyses: (a) evaluation of taxon instability relative to the incompleteness ("mc.run"), and (b) changes in branch support values after pruning unstable taxa ("avmc.run"). To properly run these files in TNT, the name of the matrix files...

Data from: Translocation of an arctic seashore plant reveals signs of maladaptation to altered climatic conditions

Maria Hällfors, Susanna Lehvävirta, Tone Aandahl, Iida-Maria Lehtimäki, Lars Ola Nilsson, Anna-Liisa Ruotsalainen, Leif Schulman & Marko Hyvärinen
Ongoing anthropogenic climate change alters the local climatic conditions to which species may be adapted. Information on species’ climatic requirements and their intraspecific variation is necessary for predicting the effects of climate change on biodiversity. We used a climatic gradient to test whether populations of two allopatric varieties of an arctic seashore herb (Primula nutans ssp. finmarchica) show adaptation to their local climates and how a future warmer climate may affect them. Our experimental set-up...

Foraging behaviour alters with social environment in a juvenile songbird

Victoria Franks, John Ewen, Mhairi McCready & Rose Thorogood
Early independence from parents is a critical period where social information acquired vertically may become outdated, or conflict with new information. However, across natural populations it is unclear if newly-independent young persist in using information from parents, or if group-level effects of conformity override previous behaviours. Here we test if wild juvenile hihi (Notiomystis cincta, a New Zealand passerine) retain a foraging behaviour from parents, or if they change in response to the behaviour of...

Parental care amplifies effects of altered brood size on offspring production

Ulrika Candolin
Recruitment is usually negatively density-dependent in relation to number of offspring produced. However, parental care can alter the pattern, as behaviours that maximise individual fitness are not necessarily beneficial at the population level. We show that in the threespine stickleback, the quality of male parental care is positively density-dependent in relation to number of eggs within a nest, which reverses negative density-dependent egg survival. This is because males invest more in larger broods, while favouring...

Fungal sporocarps house diverse and host-specific communities of fungicolous fungi

Sundy Maurice, Gontran Arnault, Jenni Norden, Synnøve Smebye Botnen, Otto Miettinen & Håvard Kauserud
Sporocarps (fruit bodies) are the sexual reproductive stage in the life cycle of many fungi. They are highly nutritious and consequently vulnerable to grazing by birds and small mammals, and invertebrates, and can be infected by microbial and fungal parasites and pathogens. The complexity of communities thriving inside sporocarps is largely unknown. In this study, we revealed the diversity, taxonomic composition and host-preference of fungicolous fungi (i.e fungi that feed on other fungi) in sporocarps....

Accounting for environmental variation in co‐occurrence modelling reveals the importance of positive interactions in root‐associated fungal communities

Nerea Abrego, Tomas Roslin, Tea Huotari, Ayco J.M. Tack, Björn D. Lindahl, Gleb Tikhonov, Panu Somervuo, Niels Martin Schmidt, Otso Ovaskainen & Ayco J. M. Tack
Understanding the role of interspecific interactions in shaping ecological communities is one of the central goals in community ecology. In fungal communities, measuring interspecific interactions directly is challenging because these communities are composed of large numbers of species, many of which are unculturable. An indirect way of assessing the role of interspecific interactions in determining community structure is to identify the species co-occurrences that are not constrained by the environmental conditions. In this study, we...

Data from: Shifts in timing and duration of breeding for 73 boreal bird species over four decades

Maria Hällfors, Laura Antão, Malcolm Itter, Aleksi Lehikoinen, Tanja Lindholm, Tomas Roslin & Marjo Saastamoinen
Breeding timed to match optimal resource abundance is vital for the successful reproduction of species, and breeding is therefore sensitive to environmental cues. As the timing of breeding shifts with a changing climate, this may not only affect the onset of breeding, but also its termination, and thus the length of the breeding period. We use an extensive dataset of over 820K nesting records of 73 bird species across the boreal region in Finland to...

Data from: Understanding sentiment of national park visitors from social media data

Anna Hausmann, Tuuli Toivonen, Christoph Fink, Vuokko Heikinheimo, Ritwik Kulkarni, Henrikki Tenkanen & Enrico Di Minin
National parks are key for conserving biodiversity and supporting people´s well-being. However, anthropogenic pressures challenge the existence of national parks and their conservation effectiveness. Therefore, it is crucial to assess how people perceive national parks in order to enhance socio-political support for conservation. User-generated data shared by visitors on social media provide opportunities to understand how people perceive (e.g. preferences, feelings, opinions) national parks during nature-based recreational experiences. In this study, we applied methods from...

Limited dispersal and an unexpected aggression pattern in a native supercolonial ant

Sanja Hakala, Mats Ittonen, Perttu Seppä & Heikki Helanterä
Understanding how social groups function requires studies on how individuals move across the landscape and interact with each other. Ant supercolonies are extreme cooperative units that may consist of thousands of interconnected nests, and their individuals cooperate over large spatial scales. However, the inner structure of suggested supercolonial (or unicolonial) societies has rarely been extensively studied using both genetic and behavioral analyses. We describe a dense supercolony-like aggregation of more than 1300 nests of the...

Testing trait plasticity over the range of spectral composition of sunlight in forb species differing in shade tolerance

Qing-Wei Wang, T. Matthew Robson, Marta Pieristè, Michio Oguro, Riichi Oguchi, Yoshinori Murai & Hiroko Kurokawa
Although sunlight is essential for plant growth and development, the relative importance of each spectral region in shaping functional traits is poorly understood, particularly in dynamic light environments such as forest ecosystems. We examined responses of 25 functional traits from groups of 11 shade-intolerant and 12 understorey shade-tolerant forb species grown outdoors under five filter treatments differing in spectral transmittance: (1) transmitting c 95% of solar radiation; (2) attenuating ultraviolet-B (UV-B); (3) attenuating all UV;...

Data from: Assessing the effectiveness of a national protected area network in maintaining carnivore populations

Julien Terraube, Jasper Van Doninck, Pekka Helle & Mar Cabeza
Protected areas (PAs) are essential to prevent further biodiversity loss yet their effectiveness varies largely with governance and external threats. Although methodological advances have permitted assessments of PA effectiveness in mitigating deforestation, we still lack similar studies for the impact of PAs on wildlife populations. Here we demonstrate the application ofuse an innovative combination of matching methods and hurdle-mixed models with a large-scale and long-term dataset of unprecedented coverage for Finland’s large carnivore species. We...

Scale-dependence of ecological assembly rules: insights from empirical datasets and joint species distribution modelling

Heidi Mod, Mathieu Chevalier, Miska Luoto & Antoine Guisan
1. A comprehensive understanding of the scale-dependency of environmental filtering and biotic interactions influencing the local assembly of species is paramount to derive realistic forecasts of the future of biodiversity and efficiently manage ecological communities. A classical assumption is that environmental filters are more prevalent at larger scales with diminishing effects towards the finest scales where biotic interactions become more decisive. Recently, a refinement was proposed stipulating that the scale-dependency of biotic interactions should relate...

Drosophila suzukii wing spot size is robust to developmental temperature

Ceferino Varón González, Antoine Fraimout & Vincent Debat
Phenotypic plasticity is an important mechanism allowing adaptation to new environments and as such it has been suggested to facilitate biological invasions. Under this assumption, invasive populations are predicted to exhibit stronger plastic responses than native populations. Drosophila suzukii is an invasive species whose males harbor a spot on the wing tip. In this study, by manipulating developmental temperature, we compare the phenotypic plasticity of wing spot size of two invasive populations with that of...

Young children’s agency in their digital media use in the sociocultural contexts of homes: a case study from Finland

Kristiina Kumpulainen, Heidi Sairanen & Alexandra Nordström
This socioculturally framed case study investigates the agency of young children aged 2 years old during their digital media use in their homes in Finland. The study has two objectives: (a) to portray children’s use of digital media in homes and (b) to identify how, if at all, children’s agency manifests itself in their digitally mediated activities in the home context. The case study data were collected by means of the “Day in the Life”...

Registration Year

  • 2020

Resource Types

  • Dataset
  • Text
  • Other
  • Software


  • University of Helsinki
  • University of Oulu
  • University of Turku
  • Natural Resources Institute Finland
  • Swedish University of Agricultural Sciences
  • University of Cambridge
  • The Arctic University of Norway
  • Finnish Environment Institute
  • Kristianstad University
  • Technische Universität Braunschweig