14 Works

A high-throughput assay for quantifying phenotypic traits of microalgae

Phoebe Argyle, Jana Hinners, Nathan G. Walworth, Sinead Collins, Naomi M. Levine & Martina A. Doblin
High-throughput methods for phenotyping microalgae are in demand across a variety of research and commercial purposes. Many microalgae can be readily cultivated in multi-well plates for experimental studies which can reduce overall costs, while measuring traits from low volume samples can reduce handling. Here we develop a high-throughput quantitative phenotypic assay (QPA) that can be used to phenotype microalgae grown in multi-well plates. The QPA integrates 10 low-volume, relatively high-throughput trait measurements (growth rate, cell...

Food deprivation exposes sex-specific trade-offs between stress tolerance and lifespan in the copepod Tigriopus californicus

Ning Li, Ben A Flanagan & Suzanne Edmands
Long life is standardly assumed to be associated with high stress tolerance. Previous work shows that the copepod Tigriopus californicus breaks this rule, with longer lifespan under benign conditions found in males, the sex with lower stress tolerance. Here we extended this previous work, raising animals from the same families in food-replete conditions until adulthood and then transferring them to food-limited conditions until all animals perished. As in previous work, survivorship under food-replete conditions favored...

Multivariate trait analysis reveals diatom plasticity constrained to a reduced set of biological axes

Phoebe Argyle, Nathan G. Walworth, Jana Hinners, Sinéad Collins, Naomi M. Levine & Martina A. Doblin
Trait-based approaches to phytoplankton ecology have gained traction in recent decades as phenotypic traits are incorporated into ecological and biogeochemical models. Here, we use high-throughput phenotyping to explore both intra- and interspecific constraints on trait combinations that are expressed in the cosmopolitan marine diatom genus Thalassiosira. We demonstrate that within Thalassiosira, phenotypic diversity cannot be predicted from genotypic diversity, and moreover, plasticity can create highly divergent phenotypes that are incongruent with taxonomic grouping. Significantly, multivariate...

Examining the Impact of Early Maternal Psychopathology on Children’s Frontal Alpha Asymmetry and Psychopathology

Alexis Hernandez & Santiago Morales
Internalizing and externalizing disorders impact the child’s social, emotional, and cognitive development, including difficulties in school, increased risk for physical health problems, substance misuse, higher risk taking behaviors, and suicide (Coleman et al., 2007; Jesulola et al., 2015). One main influence on children’s internalizing and externalizing disorders are maternal characteristics such as mothers’ perinatal psychopathology (Monk et al., 2019). Perinatal maternal psychopathology like depression and anxiety have been found to be associated with higher risk...

Why the long teeth? Morphometric analysis suggests different selective pressures on functional occlusal traits in Plio-Pleistocene African suids

Deming Yang, Asli Pisano, Joan Kolasa, Tea Jashashvili, Job Kibii, Ana Gomez Cano, Laurent Viriot, Frederick Grine & Antoine Souron
Neogene and Pleistocene African suids displayed convergent evolutionary trends in the third molar (M3) morphology, with increasingly elongated and higher crowns through time. While these features can prevent premature loss of masticatory functionality and potentially increase long-term reproductive success, changes in dental occlusal traits such as enamel complexity and thickness can also improve chewing efficiency and increase short-term energetic return. While both long-term and short-term benefits can contribute to the thriving of a lineage, the...

Geographic and temporal morphological stasis in the latest Cretaceous ammonoid Discoscaphites iris from the U.S. Gulf and Atlantic Coastal Plains

James Witts, Corinne Myers, Matthew Garb, Kayla Irizarry, Ekaterina Larina, Anastasia Rashkova & Neil Landman
We examine temporal and spatial variation in morphology of the ammonoid cephalopod Discoscaphites iris using a large dataset from multiple localities in the Late Cretaceous (Maastrichtian) of the United States Gulf and Atlantic Coastal Plains, spanning a distance of 2000 km along the paleoshoreline. Our results suggest that the fossil record of D. iris is consistent with no within species net accumulation of phyletic evolutionary change across morphological traits or the lifetime of this species....

Young children's understanding of belief formation

Qianhui Ni & Henrike Moll
This is the pre-registration of the first study on 3-year-olds' understanding of belief formation.

A deglacial hazard cascade exemplified by the landslide, tsunami and outburst flood at Elliot Creek, Southern Coast Mountains, British Columbia, Canada

Marten Geertsema, Brian Menounos, Gemma Bullard, Jonathan Carrivick, John Clague, Chunli Dai, Davide Donati, Goran Ekstrom, Jennifer Jackson, Patrick Lynett, Manuele Pichierri, Andy Pon, Dan Shugar, Doug Stead, Justin Del Bel Belluz, Pierre Friele, Ian Giesbrecht, Derek Heathfield, Tom Millard, Sasha Nasonova, Andrew Schaeffer, Brent Ward, Darren Blaney, Erik Blaney, Camille Brillon … & Meghan Sharp
We describe and model the evolution of a recent landslide and outburst flood in the southern Coast Mountains, British Columbia, Canada. About 18 Mm3 of rock descended 1000 m from a steep valley wall and traveled across the toe of a glacier before entering a 0.6 km2 glacier lake and producing a >100-m high wave. Water overtopped the lake outlet and scoured a 10-km long channel before depositing debris on a 2 km2 fan below...

A new genus of treeshrew and other micromammals from the middle Miocene hominoid locality of Ramnagar, Udhampur District, Jammu & Kashmir, India

Ramesh Sehgal, Abhishek Singh, Christopher Gilbert, Biren Patel, Christopher Campisano, Keegan Selig, Rajeev Patnaik & Ningthoujam Premjit Singh
The fossil record of treeshrews, hedgehogs, and other micromammals from the Lower Siwaliks of India is sparse. Here, we report on a new genus and species of fossil treeshrew, specimens of the hedgehog Galerix, and other micromammals from the middle Miocene (Lower Siwalik) deposits surrounding Ramnagar (Udhampur District, Jammu & Kashmir), at a fossil locality known as Dehari. The treeshrew from Dehari (Sivatupaia ramnagarensis gen. nov. et sp. nov.) currently represents the oldest record of...

A dataset for pollinator diversity and their interactions with plants in the Pacific NorthWest

Laura Melissa Guzman, Tyler Kelly & Elizabeth Elle
Pollinator populations have declined substantially in recent years. The resulting loss in pollination services has both ecological and economic consequences including reductions in plant diversity and crop production and lower food security. Datasets that identify pollinators and their plant hosts are of utmost importance in order to understand the main causes of pollinator declines. Here we present a dataset, which contains 67,954 individual pollinator records. The data has been collected across the Pacific Northwest, primarily...

Toddlers' Selection of Mature Helpers in the Context of Problem Solving

Alexandra Little
It has been established that young children seek help from others when engaged in a task that exceeds their competence (Vredenburgh & Kushnir, 2015). By age 2, children attend to a potential helper’s competence when deciding to seek help (Cluver et al., 2013). However, not much is known otherwise about the basis on which children decide whom to address for help. This study investigates whether children choose helpers based on maturity (infant versus adult; small...

Systemic Bias and DEIA Reform of the Force Concept Inventory

Dana Milstein & Jade Winn

Combining metabolomics and experimental evolution reveals key mechanisms underlying longevity differences in laboratory evolved Drosophila melanogaster populations

Mark Phillips, Kenneth R. Arnold, Zer Vue, Heather K. Beasley, Edgar Garza-Lopez, Andrea G. Marshall, Derrick J. Morton, Melanie R. McReynolds, Thomas T. Barter & Antentor Hinton
Experimental evolution with Drosophila melanogaster has been used extensively for decades to study aging and longevity. In recent years, the addition of DNA and RNA sequencing to this framework has allowed researchers to leverage the statistical power inherent to experimental evolution to study the genetic basis of longevity itself. Here, we incorporated metabolomic data into to this framework to generate even deeper insights into the physiological and genetic mechanisms underlying longevity differences in three groups...

Fitness of gnotobiotic Rhodnius prolixus nymphs

Kevin Vogel, Carissa Gilliland, Vilas Patel, Ashley Dombrowski & Bradley Mackett
Kissing bugs (Hempitera: Reduviidae) are obligately and exclusively blood feeding insects. Vertebrate blood is thought to provide insufficient B vitamins to insects, which rely on obligate symbiotic relationships with bacteria that provision these nutrients. Kissing bugs harbor environmentally acquired bacteria in their gut lumen, without which they are unable to develop to adulthood. Early experiments identified a single bacterial species, Rhodococcus rhodnii, as a symbiont of Rhodnius prolixus, but modern studies of the kissing bug...

Registration Year

  • 2022
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Affiliations

  • University of Southern California
    14
  • University of Edinburgh
    2
  • Simon Fraser University
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  • University of Technology Sydney
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  • Helmholtz-Zentrum Hereon
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  • Pennsylvania State University
    2
  • City University of New York
    1
  • Columbia University
    1
  • Meharry Medical College
    1
  • University of Georgia
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