7 Works

Data from: Biodiversity response to natural gradients of multiple stressors on continental margins

Erik A. Sperling, Christina A. Frieder & Lisa A. Levin
Sharp increases in atmospheric CO2 are resulting in ocean warming, acidification and deoxygenation that threaten marine organisms on continental margins and their ecological functions and resulting ecosystem services. The relative influence of these stressors on biodiversity remains unclear though, as well as the threshold levels for change and when secondary stressors become important. One strategy to interpret adaptation potential and predict future faunal change is to examine ecological shifts along natural gradients in the modern...

Data from: Genetic inviability is a major driver of type-III survivorship in experimental families of a highly fecund marine bivalve

Louis V. Plough, Grace Shin & Dennis Hedgecock
The offspring of most highly fecund marine fish and shellfish suffer substantial mortality early in the life cycle, complicating prediction of recruitment and fisheries management. Early mortality has long been attributed to environmental factors and almost never to genetic sources. Previous work on a variety of marine bivalve species uncovered substantial genetic inviability among the offspring of inbred crosses, suggesting a large load of early-acting deleterious recessive mutations. However, genetic inviability of randomly bred offspring...

Data from: Adaptation in isolated populations: when does it happen and when can we tell?

Jessica L. Crisci, Matthew D. Dean & Peter Ralph
Isolated populations with novel phenotypes present an exciting opportunity to uncover the genetic basis of ecologically significant adaptation, and genomic scans have often, but not always, led to candidate genes directly related to an adaptive phenotype. However, in many cases these populations were established by a severe bottleneck, which can make identifying targets of selection problematic. Here, we simulate severe bottlenecks and subsequent selection on standing variation, mimicking adaptation after establishment of a new small...

Data from: Recovery from hybrid breakdown in a marine invertebrate is faster, stronger and more repeatable under environmental stress

AnnMarie S. Hwang, Victoria Pritchard, Suzanne Edmands & V. L. Pritchard
Understanding how environmental stress alters the consequences of hybridization is important, because the rate of hybridization and the likelihood of hybrid speciation both appear elevated in harsh, disturbed or marginal habitats. We assessed fitness, morphometrics and molecular genetic composition over 14 generations of hybridization between two highly divergent populations of the marine copepod Tigriopus californicus. Replicated, experimental hybrid populations in both control and high salinity conditions showed a decline in fitness, followed by a recovery....

Data from: Extreme QTL mapping of germination speed in Arabidopsis thaliana

Wei Yuan, Jonathan M. Flowers, Dustin J. Sahraie, Ian M. Ehrenreich & Michael D. Purugganan
Seed germination is a key life history transition for annual plants and partly determines lifetime performance and fitness. Germination speed, the elapsed time for a nondormant seed to germinate, is a poorly understood trait important for plants’ competitiveness and fitness in fluctuating environments. Germination speed varied by 30% among 18 Arabidopsis thaliana populations measured, and exhibited weak negative correlation with flowering time and seed weight, with significant genotype effect (P < 0.005). To dissect the...

Data from: The wings before the bird: an evaluation of flapping-based locomotory hypotheses in bird antecedents

T. Alexander Dececchi, Hans C.E. Larsson & Michael B. Habib
Background. Powered flight is implicated as a major driver for the success of birds. Here we examine the effectiveness of three hypothesized pathways for the evolution of the flight stroke, the forelimb motion that powers aerial locomotion, in a terrestrial setting across a range of stem and basal avians: flap running, Wing Assisted Incline Running (WAIR), and wing-assisted leaping. Methods. Using biomechanical mathematical models based on known aerodynamic principals and in vivo experiments and ground...

Data from: The genetic architecture of freezing tolerance varies across the range of Arabidopsis thaliana

Matthew W. Horton, Glenda Willems, Eriko Sasaki, Maarten Koornneef & Magnus Nordborg
The capacity to tolerate freezing temperatures limits the geographical distribution of many plants, including several species of agricultural importance. However, the genes involved in freezing tolerance remain largely unknown. Here, we describe the variation in constitutive freezing tolerance that occurs among worldwide accessions of Arabidopsis thaliana. We found that although plants from high latitudes tend to be more freezing tolerant than plants from low latitudes, the environmental factors that shape cold adaptation differ across the...

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  • Austrian Academy of Sciences
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  • Max Planck Institute for Plant Breeding Research
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