42 Works

Data from: Disentangling the ‘brown world’ faecal-detritus interaction web: dung beetle effects on soil microbial properties

Eleanor M. Slade, Tomas Roslin, Minna Santalahti & Thomas Bell
Many ecosystem services are sustained by the combined action of microscopic and macroscopic organisms, and shaped by interactions between the two. However, studies tend to focus on only one of these two components. We combined the two by investigating the impact of macrofauna on microbial community composition and functioning in the context of a major ecosystem process: the decomposition of dung. We compared bacterial communities of pasture soil and experimental dung pats inhabited by one...

Data from: Photosynthetic and phenological responses of dwarf shrubs to the depth and properties of snow

Timo Saarinen, Sirpa Rasmus, Robin Lundell, Olli-Kalle Kauppinen & Heikki Hänninen
Snow is known to have a major impact on vegetation in arctic ecosystems, but little is known about how snow affects plants in boreal forests, where the snowpack is uneven due to canopy impact. The responses of two dwarf shrubs, the evergreen Vaccinium vitis-idaea and the deciduous V. myrtillus, to snow conditions were studied in a snow manipulation experiment in southern Finland. The thermal insulation of the snowpack was expected to decrease with partial removal...

Data from: The evolutionary legacy of size-selective harvesting extends from genes to populations

Silva Uusi-Heikkilä, Andrew R. Whiteley, Anna Kuparinen, Shuichi Matsumura, Paul A. Venturelli, Christian Wolter, Jon Slate, Craig R. Primmer, Thomas Meinelt, Shaun S. Killen, David Bierbach, Giovanni Polverino, Arne Ludwig & Robert Arlinghaus
Size-selective harvesting is assumed to alter life histories of exploited fish populations, thereby negatively affecting population productivity, recovery, and yield. However, demonstrating that fisheries-induced phenotypic changes in the wild are at least partly genetically determined has proved notoriously difficult. Moreover, the population-level consequences of fisheries-induced evolution are still being controversially discussed. Using an experimental approach, we found that five generations of size-selective harvesting altered the life histories and behavior, but not the metabolic rate, of...

Data from: Genetic variability and structuring of Arctic charr (Salvelinus alpinus) populations in northern Fennoscandia

Takahito Shikano, Antero Järvinen, Paula Marjamäki, Kimmo K. Kahilainen & Juha Merilä
Variation in presumably neutral genetic markers can inform us about evolvability, historical effective population sizes and phylogeographic history of contemporary populations. We studied genetic variability in 15 microsatellite loci in six native landlocked Arctic charr (Salvelinus alpinus) populations in northern Fennoscandia, where this species is considered near threatened. We discovered that all populations were genetically highly (mean FST ≈ 0.26) differentiated and isolated from each other. Evidence was found for historical, but not for recent...

Data from: Flight-induced changes in gene expression in the Glanville fritillary butterfly

Jouni Kvist, Anniina I. K. Mattila, Panu Somervuo, Virpi Ahola, Patrik Koskinen, Lars Paulin, Leena Salmela, Toby Fountain, Pasi Rastas, Annukka Ruokolainen, Minna Taipale, Liisa Holm, Petri Auvinen, Rainer Lehtonen, Mikko J. Frilander, Ilkka Hanski & Anniina L. K. Mattila
Insect flight is one of the most energetically demanding activities in the animal kingdom, yet for many insects flight is necessary for reproduction and foraging. Moreover, dispersal by flight is essential for the viability of species living in fragmented landscapes. Here, working on the Glanville fritillary butterfly (Melitaea cinxia), we use transcriptome sequencing to investigate gene expression changes caused by 15 min of flight in two contrasting populations and the two sexes. Male butterflies and...

Data from: I’m sexy and I glow it: female ornamentation in a nocturnal capital breeder

Juhani Hopkins, Gautier Baudry, Ulrika Candolin & Arja Kaitala
In many species, males rely on sexual ornaments to attract females. Females, by contrast, rarely produce ornaments. The glow-worm (Lampyris noctiluca) is an exception where wingless females glow to attract males that fly in search of females. However, little is known about the factors that promote the evolution of female ornaments in a sexual selection context. Here, we investigated if the female ornament of the glow-worm is a signal of fecundity used in male mate...

Data from: Lake size and fish diversity determine resource use and trophic position of a top predator in high-latitude lakes

Antti P. Eloranta, Kimmo K. Kahilainen, Per-Arne Amundsen, Rune Knudsen, Chris Harrod & Roger I. Jones
Prey preference of top predators and energy flow across habitat boundaries are of fundamental importance for structure and function of aquatic and terrestrial ecosystems, as they may have strong effects on production, species diversity, and food-web stability. In lakes, littoral and pelagic food-web compartments are typically coupled and controlled by generalist fish top predators. However, the extent and determinants of such coupling remains a topical area of ecological research and is largely unknown in oligotrophic...

Data from: Crying wolf to a predator: deceptive vocal mimicry by a bird protecting young

Branislav Igic, Jessica McLachlan, Inkeri Lehtinen & Robert D. Magrath
Animals often mimic dangerous or toxic species to deter predators; however, mimicry of such species may not always be possible and mimicry of benign species seems unlikely to confer anti-predator benefits. We reveal a system in which a bird mimics the alarm calls of harmless species to fool a predator 40 times its size and protect its offspring against attack. Our experiments revealed that brown thornbills (Acanthiza pusilla) mimic a chorus of other species' aerial...

Data from: Ethnicity- and sex-based discrimination and the maintenance of self-esteem

Jan-Erik Lönnqvist, Heike Hennig-Schmidt & Gari Walkowitz
The psychological underpinnings of labor market discrimination were investigated by having participants from Israel, the West Bank and Germany (N = 205) act as employers in a stylized employment task in which they ranked, set wages, and imposed a minimum effort level on applicants. State self-esteem was measured before and after the employment task, in which applicant ethnicity and sex were salient. The applicants were real people and all behavior was monetarily incentivized. Supporting the...

Data from: Strategies of zooplanktivory shape dynamics and diversity of littoral plankton communities: a mesocosm approach

Laura K. Helenius, Anna Aymà Padros, Elina Leskinen, Hannu Lehtonen & Leena Nurminen
Planktivorous fish can exert strong top-down control on zooplankton communities. By incorporating different feeding strategies, from selective particulate feeding to cruising filter feeding, fish species target distinct prey. In this study, we investigated the effects of two species with different feeding strategies, the three-spined stickleback (Gasterosteus aculeatus (L.)) and roach (Rutilus rutilus (L.)), on a low-diversity brackish water zooplankton community using a 16-day mesocosm experiment. The experiment was conducted on a small-bodied spring zooplankton community...

Data from: Temperature and sex related effects of serine protease alleles on larval development in the Glanville fritillary butterfly

Virpi Ahola, Patrik Koskinen, Swee Chong Wong, Jouni Kvist, Lars Paulin, Petri Auvinen, Marjo Saastamoinen, Mikko J. Frilander, Rainer Lehtonen, Ilkka Hanski, R. Lehtonen, P. Koskinen, J. Kvist, L. Paulin, P. Auvinen, M. J. Frilander, V. Ahola, S. C. Wong, M. Saastamoinen & I. Hanski
The body reserves of adult Lepidoptera are accumulated during larval development. In the Glanville fritillary butterfly, larger body size increases female fecundity, but in males fast larval development and early eclosion, rather than large body size, increase mating success and hence fitness. Larval growth rate is highly heritable, but genetic variation associated with larval development is largely unknown. By comparing the Glanville fritillary population living in the Åland Islands in northern Europe with a population...

Data from: Inter-annual variation and long-term trends in proportions of resident individuals in partially migratory birds

Kalle Meller, Anssi V Vähätalo, Tatu Hokkanen, Jukka Rintala, Markus Piha & Aleksi Lehikoinen
Partial migration – a part of a population migrates and another part stays resident year-round on the breeding site – is probably the most common type of migration in the animal kingdom, yet it has only lately garnered more attention. Theoretical studies indicate that in partially migratory populations, the proportion of resident individuals (PoR) should increase in high latitudes in response to the warming climate, but empirical evidence exists for few species. We provide the...

Data from: Ants medicate to fight disease

Nick Bos, Liselotte Sundström, Siiri Fuchs & Dalial Freitak
Parasites are ubiquitous, and the ability to defend against these is of paramount importance. One way to fight diseases is self-medication, which occurs when an organism consumes biologically active compounds to clear, inhibit or alleviate disease symptoms. Here, we show for the first time that ants selectively consume harmful substances (Reactive Oxygen Species, ROS) upon exposure to a fungal pathogen, yet avoid these in the absence of infection. This increased intake of ROS, while harmful...

Data from: Environmental fluctuations restrict eco-evolutionary dynamics in predator-prey system

Teppo Hiltunen, Gökçe B. Ayan, Lutz Becks & T. Hiltunen
Environmental fluctuations, species interactions and rapid evolution are all predicted to affect community structure and their temporal dynamics. Although the effects of the abiotic environment and prey evolution on ecological community dynamics have been studied separately, these factors can also have interactive effects. Here we used bacteria–ciliate microcosm experiments to test for eco-evolutionary dynamics in fluctuating environments. Specifically, we followed population dynamics and a prey defence trait over time when populations were exposed to regular...

Data from: Temporal stability of genetic variability and differentiation in the three-spined stickleback (Gasterosteus aculeatus)

Jacquelin DeFaveri & Juha Merilä
Temporal variation in allele frequencies, whether caused by deterministic or stochastic forces, can inform us about interesting demographic and evolutionary phenomena occurring in wild populations. In spite of the continued surge of interest in the genetics of three-spined stickleback (Gasterosteus aculeatus) populations, little attention has been paid towards the temporal stability of allele frequency distributions, and whether there are consistent differences in effective size (Ne) of local populations. We investigated temporal stability of genetic variability...

Data from: Thermal biology of flight in a butterfly: genotype, flight metabolism, and environmental conditions

Anniina L. K. Mattila
Knowledge of the effects of thermal conditions on animal movement and dispersal is necessary for a mechanistic understanding of the consequences of climate change and habitat fragmentation. In particular, the flight of ectothermic insects such as small butterflies is greatly influenced by ambient temperature. Here, variation in body temperature during flight is investigated in an ecological model species, the Glanville fritillary butterfly (Melitaea cinxia). Attention is paid on the effects of flight metabolism, genotypes at...

Data from: Understanding the dominant controls on litter decomposition

Mark A. Bradford, Bjorn Berg, Daniel S. Maynard, William R. Wieder & Stephen A. Wood
Litter decomposition is a biogeochemical process fundamental to element cycling within ecosystems, influencing plant productivity, species composition and carbon storage. Climate has long been considered the primary broad-scale control on litter decomposition rates, yet recent work suggests that plant litter traits may predominate. Both decomposition paradigms, however, rely on inferences from cross-biome litter decomposition studies that analyse site-level means. We re-analyse data from a classical cross-biome study to demonstrate that previous research may falsely inflate...

Data from: Signatures of selection in the three-spined stickleback along a small scale brackish water - freshwater transition zone

Nellie Konijnendijk, Takahito Shikano, Dorien Daneels, Filip A. M. Volckaert, Joost A. M. Raeymaekers & Filip A.M. Volckaert
Local adaptation is often obvious when gene flow is impeded, such as observed at large spatial scales and across strong ecological contrasts. However, it becomes less certain at small scales such as between adjacent populations or across weak ecological contrasts, when gene flow is strong. While studies on genomic adaptation tend to focus on the former, less is known about the genomic targets of natural selection in the latter situation. In this study, we investigate...

Data from: Mesoclosures – increasing realism in mesocosm studies of ecosystem functioning

Saija Lähteenmäki, Eleanor M. Slade, Bess Hardwick, Gustavo Schiffler, Júlio Louzada, Jos Barlow & Tomas Roslin
1. Experimental studies linking community composition to functioning are typically confined to small and closed micro- or mesocosms. Such restricted conditions may affect both species’ biology and their environment. Yet, targeting simple features in the behaviour of species may circumvent these constraints. Focusing on ecological functions provided by dung beetles, we test whether large, open-top cages – MESOCLOSURES – will intercept the flight trajectories of beetles, thereby allowing manipulation of local community composition. 2. MESOCLOSURES...

Data from: Establishing a community-wide DNA barcode library as a new tool for arctic research

H. Wirta, G. Várkonyi, C. Rasmussen, R. Kaartinen, N. M. Schmidt, P. D. N. Hebert, M. Barták, G. Blagoev, H. Disney, S. Ertl, P. Gjelstrup, D. J. Gwiazdowicz, L. Huldén, J. Ilmonen, J. Jakovlev, M. Jaschhof, J. Kahanpää, T. Kankaanpää, P. H. Krogh, R. Labbee, C. Lettner, V. Michelsen, S. A. Nielsen, T. R. Nielsen, L. Paasivirta … & T. Roslin
DNA sequences offer powerful tools for describing the members and interactions of natural communities. In this study, we establish the to-date most comprehensive library of DNA barcodes for a terrestrial site, including all known macroscopic animals and vascular plants of an intensively studied area of the High Arctic, the Zackenberg Valley in Northeast Greenland. To demonstrate its utility, we apply the library to identify nearly 20 000 arthropod individuals from two Malaise traps, each operated...

Data from: Rewetting of drained boreal spruce swamp forests results in rapid recovery of Sphagnum production

Liisa Maanavilja, Laura Kangas, Lauri Mehtätalo & Eeva-Stiina Tuittila
1. Peatland rewetting aims to restore biomass accumulation from peat-forming plants for climate change mitigation, biotope conservation and water purification purposes. Boreal spruce swamp forests in Europe have suffered heavily from drainage for forestry and are now a focus of restoration efforts. 2. We measured Sphagnum height and biomass increment by allowing Sphagnum to grow through mesh nets located in nine undrained, nine drained and 18 rewetted boreal spruce swamp forests. 3. At the moss...

Data from: The de novo genome assembly and annotation of a female domestic dromedary of North African origin

Robert R. Fitak, Elmira Mohandesan, Jukka Corander & Pamela A. Burger
The single-humped dromedary (Camelus dromedarius) is the most numerous and widespread of domestic camel species and is a significant source of meat, milk, wool, transportation and sport for millions of people. Dromedaries are particularly well adapted to hot, desert conditions and harbour a variety of biological and physiological characteristics with evolutionary, economic and medical importance. To understand the genetic basis of these traits, an extensive resource of genomic variation is required. In this study, we...

Data from: Air humidity thresholds trigger active moss spore release to extend dispersal in space and time

Victor Johansson, Niklas Lönnell, Üllar Rannik, Sebastian Sundberg & Kristoffer Hylander
1. Understanding the complete dispersal process is important for making realistic predictions of species distributions, but mechanisms for diaspore release in wind-dispersed species are often unknown. However, diaspore release under conditions that increase the probability of longer dispersal distances and mechanisms that extend dispersal events in time may have evolutionary advantages. 2. We quantified air humidity thresholds regulating spore release in the moss Brachythecium rutabulum. We also investigated the prevailing micrometeorological conditions when these thresholds...

Data from: The sexual selection paradigm: have we overlooked other mechanisms in the evolution of male ornaments?

Ulrika Candolin & Iina Tukiainen
Extravagant male ornaments expressed during reproduction are almost invariably assumed to be sexually selected and evolve through competition for mating opportunities. Yet in species where male reproductive success depends on the defence of offspring, male ornaments could also evolve through social competition for offspring survival. However, in contrast to female ornaments, this possibility has received little attention in males. We show that a male ornament that is traditionally assumed to be sexually selected—the red nuptial...

Data from: Age-related effects of chronic hantavirus infection on female host fecundity

Eva R. Kallio, Heikki Helle, Esa Koskela, Tapio Mappes & Olli Vapalahti
1. Pathogens often cause detrimental effects to their hosts and, consequently, may influence host population dynamics that may, in turn, feed back to pathogen transmission dynamics. Understanding fitness effects of pathogens upon animal host populations can help to predict the risks that zoonotic pathogens pose to humans. 2. Here we determine whether chronic infection by Puumala hantavirus (PUUV) affects important fitness-related traits, namely the probability of breeding, reproductive effort and mother and offspring condition, in...

Registration Year

  • 2015

Resource Types

  • Dataset


  • University of Helsinki
  • University of Jyväskylä
  • Swedish University of Agricultural Sciences
  • Natural Resources Institute Finland
  • University of Eastern Finland
  • University of Groningen
  • University of Cambridge
  • Finnish Environment Institute
  • Australian National University
  • Aarhus University
  • Eötvös Loránd University
  • University of Copenhagen
  • University of Oxford
  • Stockholm University
  • University of Turku