32 Works

Data from: Climate and vegetation structure shape ant communities along elevational gradients on the Colorado Plateau

Derek Uhey & Richard Hofstetter
Aim: Terrestrial animal communities are largely shaped by vegetation and climate. With climate also shaping vegetation, can we attribute animal patterns solely to climate? To understand this, we compare the relative and interactive effects of climate and vegetation on an animal community. Our study observes ant community changes along climatic gradients (i.e. elevational gradients) within different habitat types (i.e. open and forest). We compare the explanatory powers and effect sizes of climate and vegetation variables...

Microbial community structure across grazing treatments and environmental gradients in the Serengeti

Bo Stevens, Derek Sonderegger & Nancy Johnson
Field-based observational research is the first step in understanding the factors that structure microbial communities and generate biogeography of soil microbes. As one of the last remaining naturally grazed ecosystems on Earth, the Serengeti National Park in Tanzania is an ideal location to study the influence of large migratory mammals on microbial communities. Also, active volcanoes generate strong environmental gradients due to ash deposition and a rain shadow. We used 16S rRNA amplicons to characterize...

Rainfall continentality, via the winter GAMS angle, provides a new dimension to biogeographical distributions in the Western United States

Richard Michalet, Philippe Choler, Ragan M. Callaway & Thomas G. Whitham
Aim: Drought stress, and its effects on the biogeography of vegetation, has focused primarily on water availability during the growing season, thus focusing primarly on summer. However, variation in rainfall continentality (i.e., the continental interior being insulated from oceanic influences) can produce striking vegetation differences. We aim to disentangle summer water balance from the influence of rainfall continentality on winter rainfall, to better understand how climate regulated the distributions of woody plants in the Western...

Adaptive trait syndromes along multiple economic spectra define cold and warm adapted ecotypes in a widely distributed foundation tree species

Davis Blasini, Dan Koepke, Kevin Grady, Gerard Allan, Catherine Gehring, Samuel A. Cushman, Thomas Whitham & Kevin Hultine
1. The coordination of traits from individual organs to whole plants is under strong selection because of environmental constraints on resource acquisition and use. However, the tight coordination of traits may provide underlying mechanisms of how locally adapted plant populations can become maladapted because of climate change. 2. To better understand local adaptation in intraspecific trait coordination, we studied trait variability in the widely distributed foundation tree species, Populus fremontii using a common garden near...

Andreanoff Active-Source OBS Experiment

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This is an active-source experiment support by OBSIC. Short-period OBS will be deployed along one strike-line just north of the Aleutians, and two dip lines that cross the Aleutian Arc. The shooting ship will be the R/V Marcus Langseth. The majority of OBS will be equipped with a 3-component geophone (4.5 Hz resonant frequency) and a hydrophone. Some stations deployed in the Aleutians Trench where water depths exceed ~5000 m will be moored above the...

Frequent burning causes large losses of carbon from deep soil layers in a temperate savanna

Adam Francis Pellegrini, Kendra K. McLauchlan, Sarah E. Hobbie, Michelle C. Mack, Abbey L. Marcotte, David M. Nelson, Steven Perakis, Peter B. Reich & Kyle Whittinghill
1. Fire activity is changing dramatically across the globe, with uncertain effects on ecosystem processes, especially belowground. Fire‚Äźdriven losses of soil carbon (C) are often assumed to occur primarily in the upper soil layers because the repeated combustion of aboveground biomass limits organic matter inputs into surface soil. However, C losses from deeper soil may occur if frequent burning reduces root biomass inputs of C into deep soil layers or stimulates losses of C via...

Maximum carboxylation rate estimation with chlorophyll content as a proxy of rubisco content

Xuehe Lu, Weimin Ju, Jing Li, Holly Croft, Jing M. Chen, Yiqi Luo, Hua Yu & Haijing Hu
The maximum carboxylation rate (Vcmax) is a key parameter in determining the plant photosynthesis rate per unit leaf area. However, most terrestrial biosphere models currently treat Vcmax as constants changing only with plant functional types, leading to large uncertainties in modelled carbon fluxes. Vcmax is tightly linked with Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco). Here we investigated the relationship between leaf chlorophyll content and Rubisco (Chl-Rub) within a winter wheat paddock. With chlorophyll as a proxy of Rubisco,...

Registration Year

  • 2020
    32

Resource Types

  • Dataset
    32

Affiliations

  • Northern Arizona University
    31
  • Wilfrid Laurier University
    3
  • University of Wyoming
    2
  • University of Edinburgh
    2
  • Auckland University of Technology
    2
  • CSIRO Ocean and Atmosphere
    2
  • University of Oklahoma
    2
  • University of Colorado Boulder
    2
  • United States Geological Survey
    2
  • Colorado State University
    2