15 Works

Data from: Sharp acoustic boundaries across an altitudinal avian hybrid zone despite asymmetric introgression

Wouter Halfwerk, Caroline Dingle, Dusan M. Brinkhuizen, Jelmer W. Poelstra, Jan Komdeur & Hans Slabbekoorn
Birdsong is a sexually selected trait that could play an important evolutionary role when related taxa come into secondary contact. Many songbird species however learn their songs through copying one or more tutors, which complicates the evolutionary outcome of such contact. Two subspecies of a presumed vocal learner, the grey-breasted wood-wren (Henicorhina leucophrys), replace each other altitudinally across the western slope of the Ecuadorian Andes. These subspecies are morphologically very similar, but show striking differences...

Data from: On the effect specificity of accessory gland products transferred by the love-dart of land snails

Monica Lodi & Joris M. Koene
Background: Sexual selection favours the evolution of male bioactive substances transferred during mating to enhance male reproductive success by affecting female physiology. These effects are mainly well documented for separate-sexed species. In simultaneous hermaphrodites, one of the most peculiar examples of transfer of such substances is via stabbing a so-called love-dart in land snails. This calcareous stylet delivers mucous products produced by accessory glands into the mate's haemolymph. In Cornu aspersum, this mucus temporarily causes...

Data from: Hidden female physiological resistance to male accessory gland substances in a simultaneous hermaphrodite

Monica Lodi & Joris M. Koene
To increase fertilization chances compared to rivals, males are favoured to transfer accessory gland proteins to females during mating. These substances, by influencing female physiology, cause alteration of her sperm usage and remating rate. Simultaneously hermaphroditic land snails with love-darts are a case in point. During courtship, a love-dart is pierced through the partner's body wall, thereby introducing accessory mucous gland products. This mucus physiologically increases paternity by inhibiting the digestion of donated sperm. The...

Data from: Understanding nutrient dynamics in an African savanna: local biotic interactions outweigh a major regional rainfall gradient

Michiel P. Veldhuis, Anneleen Hulshof, Wimke Fokkema, Matty P. Berg & Han Olff
Nutrient availability in terrestrial ecosystems has been found to vary along regional climatic and soil gradients and drive variation in plant community composition and vegetation structure. However, more local biotic feedbacks also affect nutrient availability, but their importance in determining vegetation structure relative to regional drivers is yet unclear. Mesic African savannas form a transition zone between the dry grasslands with relatively low nitrogen availability (indicated by low plant N:P ratios) and the wet woodlands...

Data from: Resolving coiled shapes reveals new reorientation behaviors in C. elegans

Onno D. Broekmans, Jarlath B. Rodgers, William S. Ryu & Greg J. Stephens
We exploit the reduced space of C. elegans postures to develop a novel tracking algorithm which captures both simple shapes and also self-occluding coils, an important, yet unexplored, component of 2D worm behavior. We apply our algorithm to show that visually complex, coiled sequences are a superposition of two simpler patterns: the body wave dynamics and a head-curvature pulse. We demonstrate the precise ΩΩ-turn dynamics of an escape response and uncover a surprising new dichotomy...

Data from: Faunal community consequence of interspecific bark trait dissimilarity in early-stage decomposing logs

Juan Zuo, Matty Berg, Roy Klein, Jasper Nusselder, Gert Neurink, Orsi Decker, Mariet M. Hefting, Ute Sass-Klaassen, Richard S. P. Van Logtestijn, Leo Goudzwaard, Jurgen Van Hal, Frank J. Sterck, Lourens Poorter, Johannes H. C. Cornelissen & Matty P. Berg
Dead tree trunks have significant ecosystem functions related to biodiversity and biogeochemical cycles. When lying on the soil surface, they are colonized by an array of invertebrate fauna, but what determines their community composition is still unclear. We apply community assembly theory to colonization of tree logs by invertebrates. During early decomposition, the attached bark is critically important as an environment filter for community assembly through habitat provision. Specifically, we hypothesized that the more dissimilar...

Data from: Noise affects nest box choice of 2 competing songbird species, but not their reproduction

Wouter Halfwerk, Christiaan Both & Hans Slabbekoorn
Anthropogenic noise levels are steadily increasing worldwide and may potentially affect many species. Short-term experimental noise exposure under field and lab conditions has revealed that noise can affect the behavior and physiology of birds. However, few studies have been able to link these short-term effects to longer-term consequences. Here, we report on 2 long-term noise exposure field experiments to assess the direct and indirect effects of noise on avian reproductive success. In one experiment, we...

Data from: The changing contribution of top-down and bottom-up limitation of mesopredators during 220 years of land use and climate change

Marianne Pasanen-Mortensen, Bodil Elmhagen, Harto Linden, Roger Bergström, Märtha Wallgren, Ype Van Der Velde, Sara A. O. Cousins & Sara A.O. Cousins
Apex predators may buffer bottom-up driven ecosystem change, as top-down suppression may dampen herbivore and mesopredator responses to increased resource availability. However, theory suggests that for this buffering capacity to be realized, the equilibrium abundance of apex predators must increase. This raises the question: will apex predators maintain herbivore/mesopredator limitation, if bottom-up change relaxes resource constraints? Here, we explore changes in mesopredator (red fox Vulpes vulpes) abundance over 220 years in response to eradication and...

Data from: Cortical thickness, surface area and subcortical volume differentially contribute to cognitive heterogeneity in Parkinson's disease

Niels Gerrits, Anita Van Loenhoud, Stan Van Den Berg, Henk Berendse, Elisabeth Foncke, Martin Klein, Diederick Stoffers, Ysbrand Van Der Werf & Odile Van Den Heuvel
Parkinson's disease (PD) is often associated with cognitive deficits, although their severity varies considerably between patients. Recently, we used voxel-based morphometry (VBM) to show that individual differences in gray matter (GM) volume relate to cognitive heterogeneity in PD. VBM does, however, not differentiate between cortical thickness (CTh) and surface area (SA), which might be independently affected in PD. We therefore re-analyzed our cohort using the surface-based method FreeSurfer, and investigated (i) CTh, SA, and (sub)cortical...

Data from: Exotic or not, leaf trait dissimilarity modulates the effect of dominant species on mixed litter decomposition

Genevieve E. Finerty, Francesco De Bello, Karolína Bílá, Matty P. Berg, André T. C. Dias, Gianni B. Pezzatti & Marco Moretti
It has long been recognized that leaf traits exert a crucial control on litter decomposition, a key process for nutrient cycling, and that invading species can greatly alter such soil processes via changes in mixed litter trait composition. Trait effects on ecosystem processes are hypothesized to operate via changes in either dominant trait values in the community (often calculated as community weighted mean trait values; CWM) or trait functional diversity (dissimilarity between species trait values;...

Data from: Plant quantity affects development and survival of a gregarious insect herbivore and its endoparasitoid wasp

Minghui Fei, Rieta Gols, Feng Zhu & Jeffrey A. Harvey
Virtually all studies of plant-herbivore-natural enemy interactions focus on plant quality as the major constraint on development and survival. However, for many gregarious feeding insect herbivores that feed on small or ephemeral plants, the quantity of resources is much more limiting, yet this area has received virtually no attention. Here, in both lab and semi-field experiments using tents containing variably sized clusters of food plants, we studied the effects of periodic food deprivation in a...

Data from: Catecholaminergic regulation of learning rate in a dynamic environment

Marieke Jepma, Peter R. Murphy, Matthew R. Nassar, Mauricio Rangel-Gomez, Martijn Meeter & Sander Nieuwenhuis
Adaptive behavior in a changing world requires flexibly adapting one’s rate of learning to the rate of environmental change. Recent studies have examined the computational mechanisms by which various environmental factors determine the impact of new outcomes on existing beliefs (i.e., the ‘learning rate’). However, the brain mechanisms, and in particular the neuromodulators, involved in this process are still largely unknown. The brain-wide neurophysiological effects of the catecholamines norepinephrine and dopamine on stimulus-evoked cortical responses...

Data from: Decoupled diversity dynamics in green and brown webs during primary succession in a salt marsh

Maarten Schrama, Fons Van Der Plas, Matty P. Berg & Han Olff
Terrestrial ecosystems are characterized by a strong functional connection between the green (plant–herbivore-based) and brown (detritus–detritivore-based) parts of the food web, which both develop over successional time. However, the interlinked changes in green and brown food web diversity patterns in relation to key ecosystem processes are rarely studied. Here, we demonstrate changes in species richness, diversity and evenness over a wide range of invertebrate green and brown trophic groups during 100 years of primary succession...

Data from: Transgenerational effects of nutrition are different for sons and daughters

Z. Valentina Zizzari, Nico M. Van Straalen & Jacintha Ellers
Food shortage is an important selective factor shaping animal life-history trajectories. Yet, despite its role, many aspects of the interaction between parental and offspring food environments remain unclear. In this study, we measured developmental plasticity in response to food availability over two generations and tested the relative contribution of paternal and maternal food availability to the performance of offspring reared under matched and mismatched food environments. We applied a cross-generational split-brood design using the springtail...

Data from: Fixation biases towards the index finger in almost-natural grasping

Dimitris Voudouris, Jeroen B. J. Smeets & Eli Brenner
We use visual information to guide our grasping movements. When grasping an object with a precision grip, the two digits need to reach two different positions more or less simultaneously, but the eyes can only be directed to one position at a time. Several studies that have examined eye movements in grasping have found that people tend to direct their gaze near where their index finger will contact the object. Here we aimed at better...

Registration Year

  • 2016
    15

Resource Types

  • Dataset
    15

Affiliations

  • VU University Amsterdam
    15
  • University of Groningen
    6
  • Leiden University
    3
  • Wageningen University & Research
    2
  • University of Cambridge
    1
  • University of California, Berkeley
    1
  • Nederlands Instituut voor Ecologie
    1
  • La Trobe University
    1
  • University Medical Center Hamburg-Eppendorf
    1
  • University of Manchester
    1