Regions in the Amazon Basin have been associated with specific biogeochemical processes, but a detailed chemical classification of the abundant and ubiquitous dissolved organic matter (DOM), beyond specific indicator compounds and bulk measurements, has not yet been established. We sampled water from different locations in the Negro, Madeira/Jamari and Tapajós River areas to characterize the molecular DOM composition and distribution. Ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) combined with excitation emission matrix (EEM)...
Forest management could potentially affect organisms in all forest habitats. However, aquatic communities in water-filled tree-holes may be especially sensitive because of small population sizes, the risk of drought and potential dispersal limitation. We set up artificial tree holes in forest stands subject to different management intensities in two regions in Germany and assessed the influence of local environmental properties (tree-hole opening type, tree diameter, water volume and water temperature) as well as regional drivers...
Data from: Assessing patterns in introduction pathways of alien species by linking major invasion databasesWolf-Christian Saul, Helen E. Roy, Olaf Booy, Lucilla Carnevali, Hsuan-Ju Chen, Piero Genovesi, Colin A. Harrower, Philip E. Hulme, Shyama Pagad, Jan Pergl & Jonathan M. Jeschke
1. Preventing the arrival of invasive alien species (IAS) is a major priority in managing biological invasions. However, information on introduction pathways is currently scattered across many databases that often use different categorisations to describe similar pathways. This hampers the identification and prioritisation of pathways in order to meet the main targets of recent environmental policies. 2. Therefore, we integrate pathway information from two major IAS databases, IUCN's Global Invasive Species Database (GISD) and the...
Data from: Mechanistic model of evolutionary rate variation en route to a nonphotosynthetic lifestyle in plantsSusann Wicke, Kai F. Müller, Claude W. DePamphilis, Dietmar Quandt, Sidonie Bellot & Gerald M. Schneeweiss
Because novel environmental conditions alter the selection pressure on genes or entire subgenomes, adaptive and nonadaptive changes will leave a measurable signature in the genomes, shaping their molecular evolution. We present herein a model of the trajectory of plastid genome evolution under progressively relaxed functional constraints during the transition from autotrophy to a nonphotosynthetic parasitic lifestyle. We show that relaxed purifying selection in all plastid genes is linked to obligate parasitism, characterized by the parasite’s...
Data from: Species pools and environmental sorting control different aspects of plant diversity and functional trait composition in recovering grasslandsTimo Conradi & Johannes Kollmann
Succession theory argues that the taxonomic and functional structure of assembling communities is regulated by the interplay of local environmental conditions and regional factors such as available species pools or landscape configurations that moderate dispersal. Yet, the relative importance of these factors and whether they control different aspects of community structure, for example species diversity or the composition of plant traits, is not well understood. This limits predictions of spatial variation in successional outcomes. We...
Data from: The escalatory Red Queen: population extinction and replacement following arms-race dynamics in poplar rustAntoine Persoons, Katherine J. Hayden, Bénédicte Fabre, Pascal Frey, Stéphane De Mita, Aurélien Tellier & Fabien Halkett
Host-parasite systems provide convincing examples of Red Queen co-evolutionary dynamics. Yet, a key process underscored in Van Valen's theory – that arms-race dynamics can result in extinction – has never been documented. One reason for this may be that most sampling designs lack the breadth needed to illuminate the rapid pace of adaptation by pathogen populations. In this study we used a 25-years temporal sampling to decipher the demographic history of a plant pathogen: the...
Data from: Comparative genomics to explore phylogenetic relationship, cryptic sexual potential and host specificity of Rhynchosporium species on grassesDaniel Penselin, Martin Muensterkoetter, Susanne Kirsten, Marius Felder, Stefan Taudien, Matthias Platzer, Kevin Ashelford, Konrad H. Paskiewicz, Richard J. Harrison, David J. Hughes, Thomas Wolf, Ekaterina Shelest, Jenny Graap, Jan Hoffmann, Claudia Wenzel, Nadine Woeltje, Kevin M. King, Bruce D. L. Fitt, Ulrich Gueldener, Anna Avrova & Wolfgang Knogge
Background: The Rhynchosporium species complex consists of hemibiotrophic fungal pathogens specialized to different sweet grass species including the cereal crops barley and rye. A sexual stage has not been described, but several lines of evidence suggest the occurrence of sexual reproduction. Therefore, a comparative genomics approach was carried out to disclose the evolutionary relationship of the species and to identify genes demonstrating the potential for a sexual cycle. Furthermore, due to the evolutionary very young...
Data from: Species interactions increase the temporal stability of community productivity in Pinus sylvestris-Fagus sylvatica mixtures across EuropeMiren Del Río, Hans Pretzsch, Ricardo Ruiz-Peinado, Evy Ampoorter, Peter Annighöfer, Ignacio Barbeito, Kamil Bielak, Gediminas Brazaitis, Lluis Coll, Lars össler, Marek Fabrika, David I. Forrester, Michael Heym, Václav Hurt, Viktor Kurylyak, Magnus Löf, Fabio Lombardi, Ekaterina Makrickiene, Bratislav Matovic, Frits Mohren, Renzo Motta, Jan Den Ouden, Maciej Pach, Quentin Ponette, Gerhard Schütze … & Lars Drössler
1.There is increasing evidence that species diversity enhances the temporal stability of community productivity in different ecosystems, although its effect at population and tree levels seems to be negative or neutral. Asynchrony in species responses to environmental conditions was found to be one of the main drivers of this stabilizing process. However, the effect of species mixing on the stability of productivity, and the relative importance of the associated mechanisms, remain poorly understood in forest...
Data from: Genetic differentiation and regional adaptation among seed origins used for grassland restoration: lessons from a multispecies transplant experimentAnna Bucharova, Stefan Michalski, Julia-Maria Hermann, Karola Heveling, Norbert Hölzel, Johannes Kollmann, Walter Durka & Oliver Bossdorf
One of the key questions in ecosystem restoration is the choice of seed material for restoring plant communities. More and more scientists and practitioners are currently advocating the use of regional seed sources, based on the argument that plants are often adapted to local or regional environmental conditions, and thus, regional seed sources should provide the best restoration success. However, there is still substantial debate about this approach, partly because of a lack of solid...
Data from: Light availability experienced in the field affects ability of following generations to respond to shading in an annual grassland plantTina Heger
For plants competing for light, grasslands represent complex environments. Grassland microhabitats vary in the amount of available light and in the spatial distribution of patches with full sunlight, light shade and deep shade. Plant populations have been shown to adapt to specific competitors and shading conditions, but it is an open question how tightly the responses of populations to different shading situations are linked to the light availability previously experienced in the field. Using maternal...
Data from: The impacts of climate change and disturbance on spatio-temporal trajectories of biodiversity in a temperate forest landscapeDominik Thom, Werner Rammer, Thomas Dirnboeck, Jörg Müller, Johannes Kobler, Klaus Katzensteiner, Norbert Helm & Rupert Seidl
The ongoing changes to climate challenge the conservation of forest biodiversity. Yet, in thermally limited systems, such as temperate forests, not all species groups might be affected negatively. Furthermore, simultaneous changes in the disturbance regime have the potential to mitigate climate-related impacts on forest species. Here, we (i) investigated the potential long-term effect of climate change on biodiversity in a mountain forest landscape, (ii) assessed the effects of different disturbance frequencies, severities and sizes and...
Data from: Shade tolerance and the functional trait - demography relationship in temperate and boreal forestsAitor Ameztegui, Alain Paquette, Bill Shipley, Michael Heym, Christian Messier & Dominique Gravel
Despite being instrumental in forest ecology, the definition and nature of shade tolerance are complex and not beyond controversy. Moreover, the role it plays in the trait – demography relationship remains unclear. Here, we hypothesize that shade tolerance can be achieved by alternative combinations of traits depending on the species’ functional group (evergreen vs. deciduous species), and that its ability to explain the array of traits involved in demography will also vary between these two...
Data from: Duration of the parasitic phase determines subsequent performance in juvenile freshwater pearl mussels (Margaritifera margaritifera)Janhavi Marwaha, Knut Helge Jensen, Per Johan Jakobsen & Juergen Geist
Host–parasite systems have been useful in understanding coevolutionary patterns in sympatric species. Based on the exceptional interaction of the long-lived and highly host-specific freshwater pearl mussel (FPM; Margaritifera margaritifera) with its much shorter-lived host fish (Salmo trutta or Salmo salar), we tested the hypotheses that a longer duration of the parasitic phase increases fitness-related performance of mussels in their subsequent post parasitic phase, and that temperature is the main factor governing the duration of the...
Background: Extracorporeal perfusion (ECP) might prolong the vital storage capabilities of composite free flaps, potentially opening a wide range of clinical applications. Aim of the study was the development a validated low-cost extracorporeal perfusion model for further research in small animal free flaps. Methods: After establishing optimal perfusion settings, a specially designed extracorporeal perfusion system was evaluated during 8-hour perfusion of rat epigastric flaps followed by microvascular free flap transfer. Controls comprised sham-operation, ischemia and...
Technical University Munich14
University of Münster2
Berlin Brandenburg Institute of Advanced Biodiversity Research2
Helmholtz Centre for Environmental Research1
University of Quebec at Montreal1
Aleksandras Stulginskis University1
Helmholtz Zentrum München1
Technical University of Zvolen1