M. Hahn results 148
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A heterogeneous lithosphere on VenusNARA Subscribed
Temperate Forest Floors: Ecosystem Hubs in Transition?NARA Subscribed
The forest floor (FF) plays a key role in carbon, nutrient, and water cycling. It is the biologically most active compartment of forest soils, highly responsive to environmental conditions. Yet, its response to current changes in environmental conditions and forest management is understudied. Temperate forests are among the best studied ecosystems globally, providing the necessary ecological and biogeochemical background infor...
What role for deliberative minipublics in sustainability transformations? An emerging topic for sustainability scienceNARA Subscribed
Democracies struggle to translate sustainability science, and public concern into sufficiently transformative actions. Ongoing polarization, politicization and disinformation extenuate this challenge. Some scholars suggest that deliberative democratic innovations can help to bridge science, public understanding and will formation, and policy implementation in the face of vested interests. In light of these challenges, we intro...
Xylazine exacerbates fentanyl-induced respiratory depression and prevents rescue by naloxone in miceNARA Subscribed
Introduction Xylazine is a veterinary sedative and widespread adulterant of illicit opioids, where it is commonly detected in combination with the potent synthetic µ opioid receptor (MOR) agonist fentanyl in fatal overdose. Methods We used whole body plethysmography to evaluate the respiratory effects of xylazine in the presence and absence of fentanyl in awake C57BL/6 mice of both sexes. We asked whether suppression of breath...
Keystone species and ecosystem engineers play critical roles in maintaining and enhancing biodiversity by modifying their environment and creating ecological niches that support a wide range of organisms. The gopher tortoise ( Gopherus polyphemus ) is a prime example in the longleaf pine sandhill ecosystems of southeastern United States. Although the gopher tortoise’s positive influence on aboveground biodiversity (especially...
Repeated Independent Formation of Triploid Lineages Contributes to Clonal Diversity in Heteronotia binoei ParthenogensNARA Subscribed
Parthenogenesis, or all‐female clonal reproduction, is rare among vertebrates. This is often attributed to the selective disadvantages of assumed reduction of genetic diversity in the absence of sex. However, parthenogenetic vertebrates have highly complex evolutionary histories, with most arising through hybridisation and many being polyploid. Here, we show that geographically widespread triploid parthenogenetic forms of the...
Functional traits allow ecologists to infer processes that structure ecological communities and quantify interactions between trophic levels. Insects are a ubiquitous group that exhibits a variety of functional traits, and studying these traits could prove useful for understanding insect community assembly. We use insect trait measurements, community sampling along a disturbance gradient, and a cafeteria-style feeding assay to...
Bdh1l Gene Expression Is a Potential Molecular Factor in the Evolution of Carotenoid‐Based Colour Diversity of Cichlid FishesNARA Subscribed
Carotenoids contribute substantially to animal body colour pattern diversity. While the ecological and evolutionary drivers of carotenoid coloration are reasonably well understood, the molecular mechanisms facilitating evolutionary transitions between red and yellow hues are less investigated. Here we leverage phylogenetically replicated red‐versus‐yellow colour contrasts in three pairs of closely related cichlid fishes ( Trop...
Genome‐Wide Adaptation to a Complex Environmental Gradient in a Keystone Phytoplankton SpeciesNARA Subscribed
Marine phytoplankton play essential roles in global primary production and biogeochemical cycles. Yet, the evolutionary genetic underpinnings of phytoplankton adaptation to complex marine and coastal environments, where many environmental variables fluctuate and interact, remain unclear. We combined population genomics with experimental transcriptomics to investigate the genomic basis underlying a natural evolutionary experime...