Jeff Chieppa
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View article: Soil resource acquisition strategy modulates global plant nutrient and water economics
Soil resource acquisition strategy modulates global plant nutrient and water economics Open
Summary Natural selection favors growth by selecting a combination of plant traits that maximize photosynthetic CO 2 assimilation at the lowest combined carbon costs of resource acquisition and use. We quantified how soil nutrient availabi…
View article: Extreme drought impacts have been underestimated in grasslands and shrublands globally
Extreme drought impacts have been underestimated in grasslands and shrublands globally Open
Climate change is increasing the frequency and severity of short-term (~1 y) drought events—the most common duration of drought—globally. Yet the impact of this intensification of drought on ecosystem functioning remains poorly resolved. T…
View article: Altered rainfall greatly affects enzyme activity but has limited effect on microbial biomass in Australian dryland soils
Altered rainfall greatly affects enzyme activity but has limited effect on microbial biomass in Australian dryland soils Open
Drylands support a substantial proportion of the worlds biodiversity and are important to food production but are sensitive to changes in rainfall regimes. Altered rainfall has been shown to impact plant growth and soil microbial activity …
View article: Severe Prolonged Drought Favours Stress-Tolerant Microbes in Australian Drylands
Severe Prolonged Drought Favours Stress-Tolerant Microbes in Australian Drylands Open
Drylands comprise one-third of Earth’s terrestrial surface area and support over two billion people. Most drylands are projected to experience altered rainfall regimes, including changes in total amounts and fewer but larger rainfall event…
View article: Severe prolonged drought favours stress-tolerant microbes in Australian drylands
Severe prolonged drought favours stress-tolerant microbes in Australian drylands Open
Drylands comprise one-third of Earth’s terrestrial surface area and support over two billion people. Most drylands are projected to experience altered rainfall regimes, including changes in total amounts and fewer but larger rainfall event…
View article: Aridity drives clinal patterns in leaf traits and responsiveness to precipitation in a broadly distributed Australian tree species
Aridity drives clinal patterns in leaf traits and responsiveness to precipitation in a broadly distributed Australian tree species Open
Aridity shapes species distributions and plant growth and function worldwide. Yet, plant traits often show complex relationships with aridity, challenging our understanding of aridity as a driver of evolutionary adaptation. We grew nine ge…
View article: Coordination of hydraulic and morphological traits across dominant grasses in eastern Australia
Coordination of hydraulic and morphological traits across dominant grasses in eastern Australia Open
Leaf hydraulic traits characterize plant drought tolerance and responses to climate change. Yet, plant hydraulics are biased towards northern hemisphere woody species. We collected rhizomes of several perennial grass species along a precip…
View article: Plant functional traits affect competitive vigor of pasture grasses during drought and following recovery
Plant functional traits affect competitive vigor of pasture grasses during drought and following recovery Open
Grassland biomass production is strongly linked with the timing and intensity of precipitation events. While the direct effects of precipitation patterns on grasses are well‐studied, less is known regarding plant–plant interactions during …
View article: Climate and stomatal traits drive covariation in nighttime stomatal conductance and daytime gas exchange rates in a widespread C<sub>4</sub> grass
Climate and stomatal traits drive covariation in nighttime stomatal conductance and daytime gas exchange rates in a widespread C<sub>4</sub> grass Open
Summary Nighttime stomatal conductance ( g sn ) varies among plant functional types and species, but factors shaping the evolution of g sn remain unclear. Examinations of intraspecific variation in g sn as a function of climate and co‐vary…
View article: Exploring patterns of thermal acclimation of leaf respiration in a marsh-mangrove ecotone
Exploring patterns of thermal acclimation of leaf respiration in a marsh-mangrove ecotone Open
Vegetated coastal ecosystems (saltmarsh, mangroves) make a large contribution to global net primary productivity and C cycling despite covering a small proportion of the earth’s surface. Yet, our understanding of C cycling processes over s…
View article: Florida mangroves show no evidence of thermal acclimation of leaf respiration: implications for coastal carbon cycling and future climate
Florida mangroves show no evidence of thermal acclimation of leaf respiration: implications for coastal carbon cycling and future climate Open
Temperature controls of physiological processes that regulate C cycling in mangrove ecosystems remain understudied. New studies that investigate mangrove sensitivity to temperature could improve representation of coastal C cycling in globa…
View article: Photosynthetic responses to climate warming differ among forest plant species in a temperate--subtropical forest ecotone
Photosynthetic responses to climate warming differ among forest plant species in a temperate--subtropical forest ecotone Open
Temperatures in Florida are expected to increase ~5°C by 2100. North Florida will shift from a temperate/subtropical climate to a tropical climate within 30 years which could alter the forest composition and productivity. We conducted a fi…
View article: Biogeography of arbuscular mycorrhizal fungal spore traits along an aridity gradient and responses to experimental rainfall manipulation
Biogeography of arbuscular mycorrhizal fungal spore traits along an aridity gradient and responses to experimental rainfall manipulation Open
Spore traits measured on AM fungal communities collected at DRI-Grass (Richmond, NSW) in 2015, and at the arid sites in NSW and QLD (Broken Hill, Milparinka, Cobar, Nyngan, Charleville, Quilpie) in 2016 and 2017. Contains 4 tables: melanin…
View article: Using “Local Climate Zones” to Detect Urban Heat Island on Two Small Cities in Alabama
Using “Local Climate Zones” to Detect Urban Heat Island on Two Small Cities in Alabama Open
Classifying “urban” and “rural” environments is a challenge in understanding urban climate, specifically urban heat islands (UHIs). Stewart and Oke developed the “local climate zone” (LCZ) classification system to clarify these distinction…
View article: Trait selection and community weighting are key to understanding ecosystem responses to changing precipitation regimes
Trait selection and community weighting are key to understanding ecosystem responses to changing precipitation regimes Open
Plant traits can be used to predict ecosystem responses to environmental change using a response–effect trait framework. To do this, appropriate traits must be identified that explain a species' influence on ecosystem function (“effect tra…
View article: Simulated Summer Rainfall Variability Effects on Loblolly Pine (Pinus taeda) Seedling Physiology and Susceptibility to Root-Infecting Ophiostomatoid Fungi
Simulated Summer Rainfall Variability Effects on Loblolly Pine (Pinus taeda) Seedling Physiology and Susceptibility to Root-Infecting Ophiostomatoid Fungi Open
Seedlings from four families of loblolly pine (Pinus taeda L.) were grown in capped open-top chambers and exposed to three different weekly moisture regimes for 13 weeks. Moisture regimes varied in intensity and frequency of simulated rain…