David Mauricio results 102
· Newest (Page 1/5, per page 25)
Author: David Mauricio ×Clear All Filters
Search Results
Aryl hydrocarbon receptor deficiency leads to sex- and age-dependent colonic dysmotility in miceNARA Subscribed
The aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor involved in xenobiotic sensing and multiple physiological functions, including intestinal homeostasis. Aging is associated with reduced colonic motility and constipation, but the contribution of AhR to intestinal motor function across sex and age remains incompletely defined. We performed a phenotypic characterization of AhR-deficient (AhR −/− ) and...
This study investigates how a subsurface dipole eddy modulates phytoplankton biomass, expressed as chlorophyll- a (Chl- a ) concentrations, in the southern Gulf of Mexico. The analysis is based on high-resolution hydrographic and biogeochemical observations collected during an oceanographic cruise in June 2015. The vertical distributions of temperature, nutrients, and Chl- a fluorescence reveal a well-defined cyclone–anticyclo...
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...
El Niño-Southern Oscillation impacts in a coffee growing region of Colombia and adaptations mechanisms among coffee producersNARA Subscribed
Understanding the vulnerability of coffee production to shifting climate patterns is a global concern. In the Colombian Andes, specifically within the Chinchiná river basin (CRB), where the local economy relies heavily on coffee production, we investigate how coffee serves as a mediator between the El Niño-Southern Oscillation (ENSO) and local producers. Our qualitative/quantitative study at nine coffee farms focuses on the st...
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...
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...
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...
Under the current global biodiversity crisis, there is a need for automated and noninvasive monitoring techniques that can gather large amounts of data cost‐effectively at various ecological scales, from local to large spatial scales. These data can then be analyzed to inform stakeholders and decision‐makers. One such technique is passive acoustic monitoring, which is commonly coupled with automatic identification of animal sp...
Patterns and Drivers of Tree Species Accumulation in Three Biodiversity Hotspots of Northwestern South AmericaNARA Subscribed
Aim This study aims to understand the relative importance of climatic anomalies since the Last Glacial Maximum (LGM) and regional biogeographic (evolutionary) features as drivers of local and regional tree species accumulation across three neotropical biodiversity hotspots in northwestern South America (Northwestern Amazon, Northern Andes and Chocó). We assess the relative influence of phylogenetic structure and dispersal on s...