15 Works

Data from: Experimental duration and predator satiation levels systematically affect functional response parameters

Yuanheng Li, Björn C. Rall & Gregor Kalinkat
Empirical feeding studies where density-dependent consumption rates are fitted to functional response models are often used to parameterize the interaction strengths in models of population or food-web dynamics. However, the relationship between functional response parameter estimates from short-term feeding studies and real-world, long-term, trophic interaction strengths remains largely unexamined. In a critical first step to address this void, we tested for systematic effects of experimental duration and predator satiation on the estimate of functional response...

Data from: Transcriptomic alterations during ageing reflect the shift from cancer to degenerative diseases in the elderly

Peer Aramillo Irizar, Sascha Schäuble, Daniela Esser, Marco Groth, Christiane Frahm, Steffen Priebe, Mario Baumgart, Nils Hartmann, Shiva Marthandan, Uwe Menzel, Jule Müller, Silvio Schmidt, Volker Ast, Amke Caliebe, Rainer König, Michael Krawczak, Michael Ristow, Stefan Schuster, Alessandro Cellerino, Stephan Diekmann, Christoph Englert, Peter Hemmerich, Jürgen Sühnel, Reinhard Guthke, Otto W. Witte … & Christoph Kaleta
Disease epidemiology during ageing shows a transition from cancer to degenerative chronic disorders as dominant contributors to mortality in the old. Nevertheless, it has remained unclear to what extent molecular signatures of ageing reflect this phenomenon. Here we report on the identification of a conserved transcriptomic signature of ageing based on gene expression data from four vertebrate species across four tissues. We find that ageing-associated transcriptomic changes follow trajectories similar to the transcriptional alterations observed...

Data from: Resource stoichiometry and availability modulate species richness and biomass of tropical litter macro-invertebrates

Malte Jochum, Andrew D. Barnes, Patrick Weigelt, David Ott, Katja Rembold, Achmad Farajallah & Ulrich Brose
1. The high biodiversity and biomass of soil communities is crucial for litter decomposition in terrestrial ecosystems such as tropical forests. However, the leaf litter that these communities consume is of particularly poor quality as indicated by elemental stoichiometry. The impact of resource quantity, quality, and other habitat parameters on species richness and biomass of consumer communities is often studied in isolation, although much can be learned from simultaneously studying both community characteristics. 2. Using...

Data from: Whole-genome patterns of linkage disequilibrium across flycatcher populations clarify the causes and consequences of fine-scale recombination rate variation in birds

Takeshi Kawakami, Carina F. Mugal, Alexander Suh, Alexander Nater, Reto Burri, Linnea Smeds & Hans Ellegren
Recombination rate is heterogeneous across the genome of various species, and so are genetic diversity and differentiation as a consequence of linked selection. However, we still lack a clear picture of the underlying mechanisms for regulating recombination. Here we estimated fine-scale population recombination rate based on the patterns of linkage disequilibrium (LD) across the genomes of multiple populations of two closely related flycatcher species (Ficedula albicollis and F. hypoleuca). This revealed an overall conservation of...

Data from: The impact of even-aged and uneven-aged forest management on regional biodiversity of multiple taxa in European beech forests

Peter Schall, Martin M. Gossner, Steffi Heinrichs, Markus Fischer, Steffen Boch, Daniel Prati, Kirsten Jung, Vanessa Baumgartner, Stefan Blaser, Stefan Böhm, Francois Buscot, Rolf Daniel, Kezia Goldmann, Kirstin Kaiser, Tiemo Kahl, Markus Lange, Jörg Müller, Jörg Overmann, Swen C. Renner, Ernst-Detlef Schulze, Johannes Sikorski, Marco Tschapka, Manfred Türke, Wolfgang W. Weisser, Bernd Wemheuer … & Kristin Kaiser
For managed temperate forests, conservationists and policymakers favour fine-grained uneven-aged management over more traditional coarse-grained even-aged management, based on the assumption that within-stand habitat heterogeneity enhances biodiversity. There is, however, little empirical evidence to support this assumption. We investigated for the first time how differently grained forest management systems affect the biodiversity of multiple above- and below-ground taxa across spatial scales. We sampled 15 taxa of animals, plants, fungi and bacteria within the largest contiguous...

Data from: Morphological and colour morph clines along an altitudinal gradient in the meadow grasshopper Pseudochorthippus parallelus

Günter Köhler, Jörg Samietz & Holger Schielzeth
Many animals show altitudinal clines in size, shape and body colour. Increases in body size and reduction in the length of body appendices in colder habitats are usually attributed to improved heat conservation at lower surface-to-volume ratios (known as Bergmann's and Allen's rule, respectively). However, the patterns are more variable and sometimes reversed in small ectotherms that are affected by shortened growing seasons. Altitude can also affect colouration. The thermal melanism hypothesis predicts darker colours...

Data from: Lack of evidence for selection favouring MHC haplotypes that combine high functional diversity

Arnaud Gaigher, Alexandre Roulin, Walid H. Gharib, Pierre Taberlet, Reto Burri & Luca Fumagalli
High rates of gene duplication and the highest levels of functional allelic diversity in vertebrate genomes are the main hallmarks of the major histocompatibility complex (MHC), a multigene family with a primordial role in pathogen recognition. The usual tight linkage among MHC gene duplicates may provide an opportunity for the evolution of haplotypes that associate functionally divergent alleles and thus grant the transmission of optimal levels of diversity to coming generations. Even though such associations...

Data from: No ecological opportunity signal on a continental scale? Diversification and life-history evolution of African true toads (Anura: Bufonidae)

H. Christoph Liedtke, Hendrik Müller, Mark-Oliver Rödel, Michele Menegon, LeGrand Nono Gonwouo, Michael F. Barej, Václav Gvoždík, Andreas Schmitz, Alan Channing, Peter Nagel & Simon P. Loader
The niche-filling process predicted by the “ecological opportunity” (EO) model is an often-invoked mechanism for generating exceptional diversity in island colonizers. Whether the same process governs lineage accumulation and trait disparity during continental colonization events is less clear. Here, we test this prediction by investigating the rate dynamics and trait evolution of one of Africa's most widespread amphibian colonizers, the true toads (Bufonidae). By reconstructing the most complete molecular phylogeny of African Bufonidae to date,...

Data from: Root and shoot glucosinolate allocation patterns follow optimal defence allocation theory

Tomonori Tsunoda, Sebastian Krosse, Nicole Van Dam & Nicole M. Van Dam
1. Optimal defence allocation theory (ODT) is one of the most prominent theoretical frameworks to explain the allocation of defence compounds within plants. It predicts that the most valuable and vulnerable plant organs have the highest levels of chemical defence. The ODT has been well worked out and experimentally tested for shoot defences, but not for root defences. To assess if ODT principles apply similarly to roots and shoots, we examined glucosinolates in aboveground and...

Data from: Temperature and consumer type dependencies of energy flows in natural communities

Birgit Lang, Roswitha B. Ehnes, Ulrich Brose & Björn C. Rall
With the world continuously warming, a mechanistic understanding of how temperature affects interaction strengths, which are fundamental to food-web stability, is needed. As interaction strengths are determined by the flows of energy from resources to consumers, we investigated effects of temperature on animal energetics. We used newly compiled datasets on respiration rates and assimilation efficiencies to assess how temperature affects the energy use (respiration rates) and the efficiency of energy gain (assimilation efficiency) for different...

Data from: Macroalgal-bacterial interactions: role of dimethylsulfoniopropionate in microbial gardening by Ulva (Chlorophyta)

Ralf W. Kessler, Anne Weiss, Stefan Kuegler, Cornelia Hermes & Thomas Wichard
The marine macroalga Ulva mutabilis (Chlorophyta) develops into callus-like colonies consisting of undifferentiated cells and abnormal cell walls under axenic conditions. U. mutabilis is routinely cultured with two bacteria, the Roseovarius sp. MS2 strain and the Maribacter sp. MS6 strain, which release morphogenetic compounds and ensure proper algal morphogenesis. Using this tripartite community as an emerging model system, we tested the hypothesis that the bacterial-algal interactions evolved as a result of mutually taking advantage of...

Data from: Testing the validity of functional response models using molecular gut content analysis for prey choice in soil predators

Bernhard Eitzinger, Björn Rall, Michael Traugott & Stefan Scheu
Analysis of predator - prey interactions is a core concept of animal ecology, explaining structure and dynamics of animal food webs. Measuring the functional response, i.e. the intake rate of a consumer as a function of prey density, is a powerful method to predict the strength of trophic links and assess motives of prey choice, particularly in arthropod communities. However, due to their reductionist set-up, functional responses, which are based on laboratory feeding experiments, may...

Data from: Terrestrial reproduction as an adaptation to steep terrain in African toads

H. Christoph Liedtke, Hendrik Müller, Julian Hafner, Johannes Penner, David J. Gower, Tomáš Mazuch, Mark-Oliver Rödel & Simon P. Loader
How evolutionary novelties evolve is a major question in evolutionary biology. It is widely accepted that changes in environmental conditions shift the position of selective optima, and advancements in phylogenetic comparative approaches allow the rigorous testing of such correlated transitions. A longstanding question in vertebrate biology has been the evolution of terrestrial life histories in amphibians and here, by investigating African bufonids, we test whether terrestrial modes of reproduction have evolved as adaptations to particular...

Data from: Beyond biomass: soil feedbacks are transient over plant life-stages and alter fitness

Jan-Hendrik Dudenhöffer, Anne Ebeling, Alexandra-Maria Klein & Cameron Wagg
1. Plants influence associated soil biotic communities that in turn can alter the performance of the subsequently growing plants. Although such ‘plant-soil feedbacks’ (PSFs) are considered as important drivers of plant community assembly, past PSF studies have mainly addressed plant biomass production. However, plant performance is not only the production of biomass, but comprises a sequence of different life-stages: from seed germination over vegetative growth up to the production of a viable progeny. 2. Here...

Data from: Propulsion in hexapod locomotion: how do desert ants traverse slopes?

Toni Wöhrl, Lars Reinhardt & Reinhard Blickhan
The employment of an alternating tripod gait to traverse uneven terrains is a common characteristic shared among many Hexapoda. Because this could be one specific cause for their ecological success, we examined the alternating tripod gait of the desert ant Cataglyphis fortis together with their ground reaction forces and weight-specific leg impulses for level locomotion and on moderate (±30 deg) and steep (±60 deg) slopes in order to understand mechanical functions of individual legs during...

Registration Year

  • 2017
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Affiliations

  • Friedrich Schiller University Jena
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  • German Center for Integrative Biodiversity Research
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  • University of Göttingen
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  • University of Freiburg
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  • University of Bern
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  • University of Basel
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  • Leipzig University
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  • University of Roehampton
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  • Swiss Federal Institute for Forest, Snow and Landscape Research
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  • Museum für Naturkunde
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