L. Mayer results 174
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No difference in nitrate leaching between digestates and untreated cattle slurry over eight years of organic arable farmingNARA Subscribed
Organic fertilizers often contribute to nitrate (NO 3 − ) leaching and impair drinking water quality, because the mineralization of applied organic nitrogen (N) is often asynchronous with crop N uptake. Crop yield, crop N uptake, seepage water and NO 3 − leaching were investigated in a lysimeter facility (Zurich, Switzerland) under temperate climate conditions during two consecutive four-year organically managed crop rotations...
Linking organic fertilizer properties to in-season N dynamics using multispectral UAV imageryNARA Subscribed
Purpose Alignment of crop nitrogen (N) demand with N supply is crucial to improve N use efficiency of organic fertilizers whose N is largely bound organically. This study aimed to evaluate the potential of unmanned aerial vehicle (UAV)-based multispectral imagery to monitor in-season N uptake and to assess how different organic fertilizers affect N dynamics. Methods A field trial in Wallbach, Switzerland, compared untreated ca...
Global patterns and regional insights into kelp forest protection, restoration, and stewardshipNARA Subscribed
Kelp forests are among the most extensive and productive coastal ecosystems, yet they remain underrepresented in global conservation policy despite widespread declines driven by interacting global- (i.e., ocean warming, marine heatwaves) to local-scale stressors. At the same time, kelp conservation and restoration efforts are expanding rapidly across regions, but measures of success and syntheses tend to primarily focus on eco...
Understanding the mechanisms underlying fast diversifications is central to evolutionary biology. This can be partly achieved by focusing on intrinsic reproductive barriers that emerge during early stages of divergence in fast‐radiating groups. Here, we explored the mechanisms underlying the divergence of two ecotypes of the Dianthus rupicola complex, which belong to the Eurasian clade of the hyperdiverse genus Dianthus , the...
Interpretable deep learning reveals spatiotemporal MRI features of brain aging that align with neurodegenerationNARA Subscribed
Cortical thinning and atrophy are hallmarks of brain aging that have been characterized using magnetic resonance imaging (MRI). Brain aging involves many neuroanatomic features whose effects on brain structure remain unexplored. To address this challenge, we trained interpretable deep neural networks (DNNs) to estimate brain age (BA) from T 1 -weighted ( T 1 w) MRI. By identifying MRI features unapparent to humans, DNNs can fi...
SNAPSHOT USA 2024: Year 6 of the Coordinated National Camera Trap Survey of the United StatesNARA Subscribed
Motivation SNAPSHOT USA is an annual, multi‐contributor camera trap survey of mammals across the United States. The growing SNAPSHOT USA dataset is intended for tracking the spatial and temporal responses of mammal populations to changes in land use, land cover and climate. These data will be useful for exploring the drivers of spatial and temporal changes in relative abundance and distribution, as well as the impacts of speci...
Alzheimer’s disease (AD) disproportionately affects women and carriers of the apolipoprotein E ε4 allele (APOE4), yet little is known about how sex and APOE interact to influence white matter (WM) integrity during disease progression. We integrated diffusion MRI and matched blood transcriptomic data to investigate these interactions and their underlying biological mechanisms. WM microstructure was quantified using diffusion te...
Leaf anatomy as evidence of water-use strategies in two seasonally dry Brazilian vegetations: a comparison of co-occurring speciesNARA Subscribed
Water-use strategies, i.e., the ratio of carbon gain to water loss, reflect how efficiently a plant assimilates carbon minimizing water loss. Leaf anatomical traits are crucial in shaping these strategies. Here, we look at evidence of water-use strategies from assessing leaf anatomical traits in two co-occurring species from the Cerrado (Brazilian savanna) and the Caatinga (a seasonally dry tropical forest in Brazil). We teste...
Micro‐Refuges or Ecological Traps: Context‐Dependent Effects of Rock Pools on Intertidal Biodiversity Across LatitudesNARA Subscribed
Aim We investigated how local‐scale environmental heterogeneity influences biodiversity patterns across broad biogeographic gradients, using intertidal microhabitats as a model system within one of the most environmentally stressful ecosystems on Earth. Location Intertidal habitats at 26 locations (two rocky shore sites per location) across six continents, spanning 98° of latitude (38°S to 60°N). Time Period 2019–2022. Major T...
Characterising the Radionuclide Fingerprint of an Advanced Gas-Cooled Nuclear Power ReactorNARA Subscribed
Radionuclides are monitored in the atmosphere for the signatures of nuclear explosions, as part of the verification of the Comprehensive Nuclear-Test-Ban Treaty (CTBT). Civil nuclear facilities, such as Nuclear Power Plants (NPPs) and Isotope Production Facilities (IPFs) are sources of anthropogenic radionuclides in the atmosphere and these signatures are sometimes indistinguishable to those of a nuclear explosion. In order to...
Subtyping of mouse pancreatic ductal adenocarcinoma (mPDAC)NARA Subscribed
Reproductive biology of invasive grass carp ( Ctenopharyngodon idella ) in two North American systemsNARA Subscribed
Grass carp ( Ctenopharyngodon idella ) are nonnative, herbivorous freshwater fish that represent an ecological threat in North American waters. However, data are limited on reproductive biology specific to wild populations in midwestern North America, despite recent concern for grass carp establishment within the Great Lakes. Basic information on reproductive traits could be useful to determine reproductive potential, inform f...