L. L. Needham results 39
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Sensory impairments and epigenetic aging: insights from self-rated hearing and vision in United States adultsNARA Subscribed
Sensory impairments are common with aging, but studies examining the relationships of these impairments with DNA methylation–based biomarkers of aging, strong predictors of morbidity and mortality, remain sparse. We investigated whether subjective measures of sensory impairment are associated with epigenetic age biomarkers. We conducted a cross-sectional analysis in a representative sample of 2344 U.S. adults from the 1999–200...
The Effect of Sediment Mud Content on Primary Production in Seagrass and Unvegetated Intertidal FlatsNARA Subscribed
As a consequence of anthropogenic activities and climate change, accelerated terrestrial sediment runoff is causing the gradual mudification of soft sediment estuarine habitats worldwide. Increased sediment mud content (< 63 µm) has been recognised to alter seagrass morphology and cause declines in primary production in unvegetated habitats. However, the effect of increased mud content on primary production in seagrass meadows...
Going under: The implications of sea‐level rise and reduced light availability on intertidal primary productionNARA Subscribed
Estuarine intertidal flats are known for high rates of primary production, however, globally these ecosystems are under threat from rising sea‐level and accelerated inputs of terrestrial sediments. These stressors simultaneously alter the duration of submersion/emersion periods and water‐column turbidity impacting seafloor photoperiods. To assess how changes in submergence time and water‐clarity can affect benthic primary prod...
Demographic composition, not demographic diversity, predicts biomass and turnover across temperate and tropical forestsNARA Subscribed
The growth and survival of individual trees determine the physical structure of a forest with important consequences for forest function. However, given the diversity of tree species and forest biomes, quantifying the multitude of demographic strategies within and across forests and the way that they translate into forest structure and function remains a significant challenge. Here, we quantify the demographic rates of 1961 tr...
Comparison of geostatistical approaches to spatially interpolate month‐year rainfall for the Hawaiian IslandsNARA Subscribed
The Hawaiian Islands have one of the most spatially diverse rainfall patterns on earth. Knowledge of these patterns is critical for a variety of resource management issues and, until now, only long‐term mean monthly and annual rainfall maps have been available for Hawai‘i. In this study, month‐year rainfall maps from January 1920 to December 2012 were developed for the major Hawaiian Islands. The maps were produced using clima...
Detection of Phthalate Metabolites in Human Amniotic FluidNARA Subscribed
Phthalate Monoesters Levels in the Urine of Young ChildrenNARA Subscribed