4 Works

Data from: CO2 enrichment and soil type additively regulate grassland productivity

H. Wayne Polley, Michael J. Aspinwall, Harold P. Collins, Anne E. Gibson, Richard A. Gill, Robert B. Jackson, Virginia L. Jin, Albina R. Khasanova, Lara G. Reichmann & Philip A. Fay
Atmospheric CO2 enrichment usually increases aboveground productivity (ANPP) of grassland vegetation, but the magnitude of the ANPP-CO2 response differs among ecosystems. Soil properties affect ANPP via multiple mechanisms and vary over topographic to geographic gradients, but have received little attention as potential modifiers of the ANPP-CO2 response. We assessed effects of three soil types, sandy loam, silty clay, and clay, on the ANPP response of perennial C3/C4 grassland communities to a subambient to elevated CO2...

Hydrology, geochemistry, and microbiology data from meter-scale infiltration experiments exploring the impact of a woodchip soil amendment on nitrate removal during infiltration

Sarah Beganskas, Galen Gorski, Tess Weathers, Andrew Fisher, Calla Schmidt, Chad Saltikov, Kaitlyn Redford, Brendon Stoneburner, Ryan Harmon & Walker Weir
We present results from field experiments linking hydrology, geochemistry, and microbiology during infiltration at a field site that is used for managed aquifer recharge (MAR). These experiments measured how a horizontal permeable reactive barrier (PRB) made of woodchips impacted subsurface nitrate removal and microbial ecology. Concentrations of dissolved organic carbon consistently increased in infiltrating water below the PRB, but not in un-amended native soil. The average nitrate removal rate in soils below the PRB was...

Data from: Shifts to earlier selfing in sympatry may reduce costs of pollinator sharing

April M. Randle, Rachel B. Spigler & Susan Kalisz
Coexisting plant congeners often experience strong competition for resources. Competition for pollinators can result in direct fitness costs via reduced seed set or indirect costs via heterospecific pollen transfer (HPT), causing subsequent gamete loss and unfit hybrid offspring production. Autonomous selfing may alleviate these costs, but to preempt HPT, selfing should occur early, before opportunities for HPT occur (i.e. “preemptive selfing hypothesis”). We evaluated conditions for this hypothesis in Collinsia sister species, C. linearis and...

Data from: The relationship between post-mating reproductive isolation and reinforcement in Phlox

Sevan S. Suni & Robin Hopkins
The process of speciation involves the accumulation of reproductive isolation (RI) between diverging lineages. Selection can favor increased RI via the process of reinforcement, whereby costs to hybridization impose selection for increased prezygotic RI. Reinforcement results in phenotypic divergence within at least one taxon, as a result of costly hybridization between sympatric taxa. The strength of selection driving reinforcement is determined by the cost of hybridization and the frequency of hybridization. We investigated the cost...

Registration Year

  • 2018
    4

Resource Types

  • Dataset
    4

Affiliations

  • University of San Francisco
    4
  • Stanford University
    1
  • The University of Texas at Austin
    1
  • Temple University
    1
  • University of North Florida
    1
  • University of Nevada Reno
    1
  • United States Department of Agriculture
    1
  • University of Tennessee at Knoxville
    1
  • Agricultural Research Service
    1
  • University of California, Santa Cruz
    1