3 Works

Data from: Inbreeding depression and drift load in small populations at demographic disequilibrium

Rachel B. Spigler, Konstantinos Theodorou & Shu-Mei Chang
Inbreeding depression is a major driver of mating system evolution and has critical implications for population viability. Theoretical and empirical attention has been paid to predicting how inbreeding depression varies with population size. Lower inbreeding depression is predicted in small populations at equilibrium, primarily due to higher inbreeding rates facilitating purging and/or fixation of deleterious alleles (drift load), but predictions at demographic and genetic disequilibrium are less clear. In this study, we experimentally evaluate how...

Data from: Changes in spatial variance during a grassland to shrubland state transition

Zak Ratajczak, Paolo D'Odorico, Jesse B. Nippert, Scott L. Collins, Nathaniel A. Brunsell & Sujith Ravi
State transitions are changes in ecosystem structure and self-reinforcing feedbacks that are initiated when an exogenous driver variable crosses a threshold. Reversing state transitions is difficult and costly. While some state transitions are relatively rapid, many take years to decades. Outside of theoretical models, very little is known about slower state transitions and how they unfold in time and space. We quantified changes in spatial variance as a mesic grassland ecosystem shifts to a shrub-dominated...

Data from: Global mammal betadiversity show parallel assemblage structure in similar but isolated environments

Caterina Penone, Ben G. Weinstein, Catherine H. Graham, Thomas M. Brooks, Carlo Rondinini, S. Blair Hedges, Ana D. Davidson & Gabriel C. Costa
The taxonomic, phylogenetic and trait dimensions of betadiversity each provide unique insight into the importance of historical isolation and environmental conditions in shaping global diversity. These three dimensions should, in general, be positively correlated. However, if similar environmental conditions filter species with similar trait values, then assemblages located in similar environmental conditions, but separated by large dispersal barriers, may show high taxonomic, high phylogenetic, but low trait betadiversity. Conversely, we expect lower phylogenetic diversity but...

Registration Year

  • 2016
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  • Dataset
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Affiliations

  • Temple University
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  • University of Kansas
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  • University of Virginia
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  • University of California, Berkeley
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  • Sapienza University of Rome
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  • University of the Aegean
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  • Federal University of Rio Grande do Norte
    1
  • University of New Mexico
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  • Kansas State University
    1