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Articles 1 - 11 of 11
Full-Text Articles in Life Sciences
Pariette Wetlands Water, Sediment And Plant Total Selenium Concentration, Colleen P. Jones, Paul R. Grossl, Astrid R. Jacobson
Pariette Wetlands Water, Sediment And Plant Total Selenium Concentration, Colleen P. Jones, Paul R. Grossl, Astrid R. Jacobson
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We measured total Selenium in plants from July through November of 2012 and in water, macroinvertebrates, plants, and sediments from July of 2014 from Pariette Wetlands, Utah, U.S.A. to test for spatial, temporal, plant species and plant tissue distribution of Selenium.
Thermal Tolerance And Physiology Of Eleutherodactylus Coqui Along An Elevational Gradient In Hawai‘I, Karen H. Beard, Susannah S. French, Jack Marchetti
Thermal Tolerance And Physiology Of Eleutherodactylus Coqui Along An Elevational Gradient In Hawai‘I, Karen H. Beard, Susannah S. French, Jack Marchetti
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The purpose of this study was to determine if the thermal tolerance and physiology of the coqui frog changed along HawaiÔiÕs elevation gradient. A short acclimation experiment was used to test the baseline thermal tolerance and physiology, and an extended acclimation experiment to test the acclimation ability of the thermal tolerance and physiology metrics of the coqui frogs collected from low (m), medium (350-550 m) and high elevations (>750 m).
Elevation Influences The Microhabitat Use And Baseline Physiology Of Coqui Frogs In Hawai‘I, Karen H. Beard, Susannah S. French, Jack Marchetti
Elevation Influences The Microhabitat Use And Baseline Physiology Of Coqui Frogs In Hawai‘I, Karen H. Beard, Susannah S. French, Jack Marchetti
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The purpose of this study was to determine whether elevation in HawaiÔi affects the coquiÕs microhabitat use such as substrate choice and height off the forest floor and physiological metrics such as osmolality, oxidative status, and energy metabolites (glucose, free glycerol, and triglycerides).
Data For Gridding, Joseph D. Birch, James A. Lutz, Soren Struckman, Jessica Miesel, Justine Karst
Data For Gridding, Joseph D. Birch, James A. Lutz, Soren Struckman, Jessica Miesel, Justine Karst
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Background: Large-diameter trees have an outsized influence on aboveground forest dynamics, composition, and structure. Although their influence on aboveground processes is well studied, their role in shaping belowground fungal communities is largely unknown. We sought to test if (H1) fungal community spatial structure matched aboveground forest structure, (H2) fungal functional guilds exhibited differential associations to aboveground tree, snag, and deadwood, and (H3) that large-diameter trees and snags have a larger influence on fungal community richness than smaller-diameter trees. We used MiSeq sequencing of fungal communities collected from soils in a spatially intensive survey in a portion of Cedar Breaks National …
Dietary Supplementation With Black Raspberries Altered The Gut Microbiome Composition In A Mouse Model Of Colitis-Associated Colorectal Cancer, Although With Differing Effects For A Healthy Versus A Western Basal Diet, Abby D. Benninghoff
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Black raspberries (BRB) are rich in anthocyanins with purported anti-inflammatory properties. However, it is not known whether dietary supplementation would ameliorate Western-diet enhanced gut inflammation and colon tumorigenesis. We employed a mouse model of colitis-associated colorectal cancer (CAC) to determine the effects of dietary supplementation with 5 to 10% (w/w) whole, freeze-dried BRB in male C57BL/6J mice fed either a standard healthy diet (AIN93G) or the total Western diet (TWD). In a pilot study, BRB suppressed colitis and colon tumorigenesis while also shifting the composition of the fecal microbiome in favor of taxa with purported health benefits, including Bifidobacteria pseudolongum. …
Data From: Complex Tourism And Season Interactions Contribute To Disparate Physiologies In An Endangered Rock Iguana, Susannah French
Data From: Complex Tourism And Season Interactions Contribute To Disparate Physiologies In An Endangered Rock Iguana, Susannah French
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To promote survival and fitness, organisms use a suite of physiological systems to respond to both predictable and unpredictable changes in the environment. These physiological responses are also influenced by changes in life history state. The continued activation of physiological systems stemming from persistent environmental perturbations enable animals to cope with these challenges but may over time lead to significant effects on the health of wildlife. In the present study, we tested how varying environmental perturbations driven by tourism and associated supplemental feeding affects the energetics, corticosterone and immunity of six discrete populations of the northern Bahamian rock iguana (Cyclura …
Blood Chemistry And Biliverdin Differ According To Reproduction And Tourism In A Free-Living Lizard, Susannah French
Blood Chemistry And Biliverdin Differ According To Reproduction And Tourism In A Free-Living Lizard, Susannah French
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Changes in the physiological health of species are an essential indicator of changing conditions and environmental challenges. Reponses to environmental challenges can often induce stress, influence physiology, and change metabolism in organisms. Here we tested blood chemistry parameters indicative of stress and metabolic activity using an i-STAT point-of-care blood analyzer in seven populations of free-ranging rock iguanas exposed to varying levels of tourism and supplemental feeding. We found significant differences in blood chemistry (glucose, oxygen, carbon dioxide, hematocrit, hemoglobin, calcium, potassium, and biliverdin levels) among populations exposed to varying levels of tourism, and also some variation between sexes and reproductive …
Data For Dancing, Joseph D. Birch, James A. Lutz, Justine Karst
Data For Dancing, Joseph D. Birch, James A. Lutz, Justine Karst
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Fungal communities can influence the productivity, composition, and survival of trees through cycling nutrients, providing resources, and altering pathogens. Thus, shifts in fungal communities could impact forests by altering interactions between trees and their environments. Fungal community composition may be shaped by stochastic and deterministic processes such as dispersal-limitation, environmental filtering, and partner specificity between trees and fungi. For tree species with large geographic ranges, we expect fungal assembly processes to change with environmental variation across the range of the tree partner. Due to specificity between trees and symbiotic fungi, we expect deterministic to outweigh stochastic processes in root compared …
Plant-Soil Feedbacks Help Explain Plant Community Productivity, Andrew Kulmatiski, Jeanette Norton, Leslie E. Forero, Josephine Grenzer
Plant-Soil Feedbacks Help Explain Plant Community Productivity, Andrew Kulmatiski, Jeanette Norton, Leslie E. Forero, Josephine Grenzer
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Plant community productivity tends to increase as species richness increases, but the mechanisms behind this biodiversity-productivity relationship are not fully understood. Plant-soil feedbacks (PSF) are a compelling potential mechanism of the biodiversity-productivity relationship because they can explain patterns of both underyielding and overyielding in diverse plant communities. To test the role of plant-soil feedbacks in the biodiversity-productivity relationship we measured all possible plant-soil feedbacks for sixteen species, and used the measured plant-soil feedbacks to predict plant community biomass production. We compared the predicted plant community biomass production to observed biomass production in a paired biodiversity-productivity experiment.
Pando Aspen 2021 Remeasure, Paul C. Rogers
Pando Aspen 2021 Remeasure, Paul C. Rogers
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Upland aspen (Populus spp.) forests contribute significantly to biodiversity in their circumboreal role as keystone species. The 43-hectare Pando aspen (Populus tremuloides Michx.) clone in Utah, USA, is thought to be the largest living organism on earth, but is faltering due to chronic herbivory. Long-term resilience in aspen communities, including Pando, rests on successful recruitment of vegetative suckers. This is the first trend assessment of this threatened iconic forest using a vital indicators approach. I examined 64 plots using 19 indicators to determine current conditions. Findings show that a genetically uniform Pando is 'breaking up' because of herbivory fencing. Initial …
Data From: Glucose Tolerance Of Iguanas Is Affected By High Sugar Diets In The Lab And Supplemental Feeding By Ecotourists In The Wild, Susannah S. French
Data From: Glucose Tolerance Of Iguanas Is Affected By High Sugar Diets In The Lab And Supplemental Feeding By Ecotourists In The Wild, Susannah S. French
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Physiological responses to both natural and anthropogenic perturbations involve changes in glucose use and metabolism to enable animals to respond to challenges. The responses are at least partially mediated via the glucocorticoids, and the proper functioning of these systems are critical to animal health. Prolonged high-sugar diets in humans can compromise physiological functions and lead to a range of diseases including diabetes. Such outcomes are less common in natural, non-human systems, likely because of evolutionarily based balances between sugar intake and the ability to process it. Due to both landscape changes and human feeding of wildlife, the introduction of unnatural …