M.L. Johnson results 506
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Conservation practitioners face the complex challenge of addressing global biodiversity threats within social-ecological systems with multiple jurisdictions, numerous interest groups, and changing environmental conditions. Bridging the research-to-implementation gap between scientists and managers, which integrates diverse perspectives that represent the variety of considerations impacting management outcomes can help to infor...
Coral acclimatization to novel, co-varying stressors is associated with fitness trade-offsNARA Subscribed
Reef-building corals are under pressure to acclimatize and/or adapt to multiple co-occurring stressors, including climate change and declines in water quality. However, their capacity to do so is largely unknown. Yet, some corals naturally persist in habitats with multi-stressor conditions which can provide crucial insight into coral adaptive capacity under future ocean conditions. To assess the role of phenotypic plasticity a...
Spatiotemporal Changes in Forest Metrics after a Catastrophic Tornado in Planted Loblolly Pine (Pinus taeda L.) StandsNARA Subscribed
Tornadoes drastically impact managed forest landscapes, altering structure, composition, and economic valuation. Tornadoes occur frequently in the US and are projected to increase in the southeastern region, which is a substantial timber-producing region. Quantifying tornado damage in managed forest landscapes is important for guiding management decisions and modeling recovery efforts to recoup economic losses. We assessed the...
Dune Russet (COTX08063-2Ru) is the first French fry russet potato cultivar released by the Texas A&M Potato Breeding Program. It derives from a cross made by the Colorado State University Potato Program between Premier Russet and A99073-1 and was subsequently selected and advanced by the Texas Program. Dune Russet has oblong potato tubers with light russet skin texture and white flesh. It is characterized by having excellent F...
Bacteria are fundamental to coral health and resilience, though a dearth of knowledge exists on the formation of the coral microbiome in early life history stages. Although this initial microbial consortium is thought to hold key roles throughout development, its sparsity is easily obscured by environmental background microbiota. This opacity renders accurate studies of the early coral microbiome difficult, and limits applicat...
In vitro propagation protocol was optimized for the endangered fern Anemia schimperiana C. Presl subsp. Wightiana (Gardner) Fraser-Jenk and Cyathea gigantea (Wall. Ex. Hook.) Holtt. using in vitro spore culture. The matured spores that were collected and sterilized with 0.1% HgCl 2 for 15 min and washed with distilled water for 20 min showed less frequency of microbial contamination. The sterilized spores were inoculated on to...
The in vitro alkaline comet assay with liver models as a complementary tool for genotoxicity assessment of N-nitrosaminesNARA Subscribed
N -nitrosamine (NA) impurities in pharmaceuticals represent “cohort of concern” compounds under ICH M7(R2), due to their mutagenic/carcinogenic potential, involving cytochrome P450 (CYP)-mediated metabolic activation. Increasing interest in mammalian cell-based genotoxicity/mutagenicity assays prompted our assessment of the in vitro alkaline comet assay regarding its predictive power for NAs. Here, precision-cut liver slices (...
A Three-Factor Experimental Study on the Effect of Specimen Size on the Shear Strength of Rock JointsNARA Subscribed
Shearing of rock joints is a critical failure mode in rock masses. The shear strength of rock joints must, therefore, be considered in the design of structures in rock masses. Several criteria for prediction of shear strength have been proposed over the years. However, the possible effect of scale on shear strength is an issue. One possible reason for this is that previous experimental studies on the scale effect contain vario...
Diversity and functional group composition drive biogeographic patterns in marine biogenic structural complexityNARA Subscribed
Biogenic structural complexity is a key driver of biodiversity and ecosystem functioning, yet its ecological and environmental determinants remain poorly understood across broad biogeographic scales. Here, we conducted standardized 90‐day field experiments at 16 coastal sites, spanning a 41‐degree latitudinal gradient, using naturally assembled marine fouling communities on settlement panels. We measured rugosity as our metric...
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...
To determine whether long-term residential air pollution [AP; ozone (O₃) and fine particulate matter (PM₂.₅)] is associated with (1) incident mild cognitive impairment (MCI) or Alzheimer’s disease (AD), (2) biomarkers of core and AD-relevant pathology, and (3) whether these relationships are moderated by APOE4+/- (carrier/non-carrier of one or both ε4 alleles) status or mediated by neuroinflammation. Sample included 795 partic...
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...