6 Works

Data from: Genetic and ecotypic differentiation in a Californian plant polyploid complex (Grindelia, Asteraceae)

Abigail J. Moore, William L. Moore & Bruce G. Baldwin
Studies of ecotypic differentiation in the California Floristic Province have contributed greatly to plant evolutionary biology since the pioneering work of Clausen, Keck, and Hiesey. The extent of gene flow and genetic differentiation across interfertile ecotypes that span major habitats in the California Floristic Province is understudied, however, and is important for understanding the prospects for local adaptation to evolve or persist in the face of potential gene flow across populations in different ecological settings....

Data from: Abortion legislation, maternal healthcare, fertility, female literacy, sanitation, violence against women, and maternal deaths: a natural experiment in 32 Mexican states

Elard Koch, Monique Chireau, Fernando Pliego, Joseph Stanford, Sebastián Haddad, Byron Calhoun, Paula Aracena, Miguel Bravo, Sebastián Gatica & John Thorp
Objective: To test whether there is an association between abortion legislation and maternal mortality outcomes after controlling for other factors thought to influence maternal health. Design: Population-based natural experiment. Setting and data sources: Official maternal mortality data from 32 federal states of Mexico between 2002 and 2011. Main outcomes: Maternal mortality ratio (MMR), MMR with any abortive outcome (MMRAO) and induced abortion mortality ratio (iAMR). Independent variables: Abortion legislation grouped as less (n=18) or more...

Data from: Evidence for varying social strategies across the day in chacma baboons

Claudia Sick, Alecia J. Carter, Harry H. Marshall, Leslie A. Knapp, Torben Dabelsteen & Guy Cowlishaw
Strong social bonds can make an important contribution to individual fitness, but we still have only a limited understanding of the temporal period relevant to the adjustment of social relationships. While there is growing recognition of the importance of strong bonds that persist for years, social relationships can also vary over weeks and months, suggesting that social strategies may be optimized over shorter timescales. Using biological market theory as a framework, we explore whether temporal...

Data from: Do pathogens limit the distributions of tropical trees across a rainfall gradient?

Erin R. Spear, Phyllis D. Coley & Thomas A. Kursar
1. Organisms are adapted to particular habitats; consequently, community composition changes across environmental gradients, enhancing regional diversity. In Panama, a rainfall gradient correlates with the spatial turnover of tree species. While strong evidence suggests that tree species common in the wetter forests are excluded from the drier forests by seasonal drought, the factor(s) excluding drought-tolerant species, common in the drier forests, from the wetter forests remain ambiguous. 2. Here, we show that seedlings were significantly...

Data from: A palaeoequatorial Ornithischian and new constraints on early dinosaur diversification

Paul M. Barrett, Richard J. Butler, Roland Mundil, Torsten M. Scheyer, Randall B. Irmis, Marcelo R. Sánchez-Villagra & M. R. Sanchez-Villagra
Current characterizations of early dinosaur evolution are incomplete: existing palaeobiological and phylogenetic scenarios are based on a fossil record dominated by saurischians and the implications of the early ornithischian record are often overlooked. Moreover, the timings of deep phylogenetic divergences within Dinosauria are poorly constrained owing to the absence of a rigorous chronostratigraphical framework for key Late Triassic–Early Jurassic localities. A new dinosaur from the earliest Jurassic of the Venezuelan Andes is the first basal...

Data from: Analytical tools for quantifying the morphology of invertebrate trace fossils

James R. Lehane & Allan A. Ekdale
The analysis of trace fossils usually is performed qualitatively, which makes comparing trace fossils from different units less objective than quantitative approaches. Quantifying the shape of trace fossils enables scientists to compare trace fossils described by different people with greater precision and accuracy. This paper describes several methods for quantifying invertebrate trace fossils, including morphology dependent methods (motility index, mesh size, topology, tortuosity, branching angle, and the number of cell sides) and morphology independent methods...

Registration Year

  • 2014

Resource Types

  • Dataset


  • University of Utah
  • Duke University
  • West Virginia University
  • University of North Carolina
  • University of California, Berkeley
  • Berkeley Geochronology Center
  • National Autonomous University of Mexico
  • Johannes Gutenberg University of Mainz
  • University of Zurich
  • Universidad Anáhuac