Holger Stephan results 37
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Geographic and Genomic Signatures of a Dynamic Evolutionary History in Lake Tanganyika's Synodontis Catfish RadiationNARA Subscribed
Aim Lacustrine systems generally exhibit greater habitat stability than riverine systems, yet some lakes have experienced substantial lake‐level fluctuations throughout the Pleistocene. These environmental perturbations repeatedly altered habitat availability critical to the evolution of their diverse fish communities. In this context, we inferred phylogenetic relationships and divergence times of lacustrine Synodontis catfish...
Pathogens in the garden dormouse Eliomys quercinusNARA Subscribed
Wild rodents are important reservoirs and vectors of various pathogens, and play a crucial role in the spread of zoonotic pathogens. The garden dormouse ( Eliomys quercinus ), an arboreal nocturnal rodent species native to Europe, has declined throughout much of its natural range in recent decades. The reason for this ongoing decline is not yet fully understood, but infectious diseases may play a role. This study aimed to revi...
Long‐Term Ecological Baselines and Critical Thresholds in Ombrotrophic Peatlands of Europe: Implications for Restoration StrategiesNARA Subscribed
Maintaining appropriate peatland hydrology, notably through the regulation of the depth to water table (DWT), is crucial for peatland conservation, restoration, and the mitigation of greenhouse gas (GHG) emissions. We assess the long‐term ecological impact of hydrological changes, primarily induced by drainage, in ombrotrophic peatlands across Europe. Our analysis is based on novel palaeoecological data from seven peat cores c...
Obligate brood parasites delegate the workload of costly parental care to their hosts. Theory predicts that release from demanding parental care increases the importance of other factors to shape mating patterns. However, behavioural observations and parentage estimates are notoriously difficult to obtain in species with covert reproductive strategies, such as brood parasites, and evidence for their mating strategies are scarc...
Bisphenols are a group of chemical compounds widely used in the industry, e.g., in the production of plastics, and as precursor of epoxy resins. The three bisphenols investigated in this study, namely bisphenols A (BPA), F (BPF) and S (BPS), seem to have endocrine activity in the same order of magnitude. Thus, an exposure and risk assessment was performed based on urinary concentrations of these bisphenols in 150 urine samples...
Successful deployment of geological carbon storage (GCS) requires an extensive use of reservoir simulators for screening, ranking and optimization of storage sites. However, the time scales of GCS are such that no sufficient long-term data is available yet to validate the simulators against. As a consequence, there is currently no solid basis for assessing the quality with which the dynamics of large-scale GCS operations can b...
Lack of host specialization despite selective host use in brood parasitic cuckoo catfishNARA Subscribed
Host–parasite dynamics involve coevolutionary arms races, which may lead to host specialization and ensuing diversification. Our general understanding of the evolution of host specialization in brood parasites is compromised by a restricted focus on bird and insect lineages. The cuckoo catfish ( Synodontis multipunctatus ) is an obligate parasite of parental care of mouthbrooding cichlids in Lake Tanganyika. Given the ecologic...
Subterranean estuaries are connective zones between inland aquifers and the open sea where terrestrial freshwater and circulating seawater mix and undergo major biogeochemical changes. They are biogeochemical reactors that modify groundwater chemistry prior to discharge into the sea. We propose that subterranean estuaries of high-energy beaches are particularly dynamic environments, where the effect of the dynamic boundary con...
The highly conserved YrdC domain-containing protein (YRDC) interacts with the well-described KEOPS complex, regulating specific tRNA modifications to ensure accurate protein synthesis. Previous studies have linked the KEOPS complex to a role in promoting telomere maintenance and controlling genome integrity. Here, we report on a newborn with a severe neonatal progeroid phenotype including generalized loss of subcutaneous fat,...
sPlotOpen – An environmentally balanced, open‐access, global dataset of vegetation plotsNARA Subscribed
Motivation Assessing biodiversity status and trends in plant communities is critical for understanding, quantifying and predicting the effects of global change on ecosystems. Vegetation plots record the occurrence or abundance of all plant species co‐occurring within delimited local areas. This allows species absences to be inferred, information seldom provided by existing global plant datasets. Although many vegetation plots...
TRY plant trait database – enhanced coverage and open accessNARA Subscribed
Plant traits—the morphological, anatomical, physiological, biochemical and phenological characteristics of plants—determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research spanning from evolutionary biology, community and functional ecology, to biodivers...
EditorialNARA Subscribed
Evolutionary liberties of the Abutilon mosaic virus clusterNARA Subscribed