Garrett Johnson results 10
· Newest (Page 1/1, per page 25)
Author: Garrett Johnson ×Clear All Filters
Search Results
The Caenorhabditis Intervention Testing Program (CITP) is an NIH-funded research consortium of investigators who conduct analyses at three independent sites to identify chemical interventions that reproducibly promote health and lifespan in a robust manner. The founding principle of the CITP is that compounds with positive effects across a genetically diverse panel of Caenorhabditis species and strains are likely engaging cons...
Application of plant metabarcoding to identify diverse honeybee pollen forage along an urban–agricultural gradientNARA Subscribed
Understanding animal foraging ecology requires large sample sizes spanning broad environmental and temporal gradients. For pollinators, this has been hampered by the laborious nature of morphologically identifying pollen. Identifying pollen from urban environments is particularly difficult due to the presence of diverse ornamental species associated with consumer horticulture. Metagenetic pollen analysis represents a potential...
Automated lifespan determination across Caenorhabditis strains and species reveals assay-specific effects of chemical interventionsNARA Subscribed
The goal of the Caenorhabditis Intervention Testing Program is to identify robust and reproducible pro-longevity interventions that are efficacious across genetically diverse cohorts in the Caenorhabditis genus. The project design features multiple experimental replicates collected by three different laboratories. Our initial effort employed fully manual survival assays. With an interest in increasing throughput, we explored a...
Bottom‐up processes mediated by social systems drive demographic traits of coral‐reef fishesNARA Subscribed
Ectotherms exhibit considerable plasticity in their life‐history traits. This plasticity can reflect variability in environmental and social factors, but the causes of observed patterns are often obscured with increasing spatial scales. We surveyed dichromatic parrotfishes across the northern Great Barrier Reef to examine variation in body size distributions and concomitant size at sex change ( L ∆50 ) against hypotheses of di...
Big bluestem ( A ndropogon gerardii ) is an ecologically dominant grass with wide distribution across the environmental gradient of U.S. Midwest grasslands. This system offers an ideal natural laboratory to study population divergence and adaptation in spatially varying climates. Objectives were to: (i) characterize neutral genetic diversity and structure within and among three regional ecotypes derived from 11 prairies across...
Previous1Next