25 Works

Hawkmoths use wingstroke-to-wingstroke frequency modulation for aerial recovery to vortex ring perturbations

Jeff Gau, Ryan Gemilere, FM Subteam LDS-VIP, James Lynch, Nick Gravish & Simon Sponberg
Centimetre-scale fliers must contend with the high power requirements of flapping flight. Insects have elastic elements in their thoraxes which may reduce the inertial costs of their flapping wings. Matching wingbeat frequency to a mechanical resonance can be energetically favourable, but also poses control challenges. Many insects use frequency modulation on long timescales, but wingstroke-to-wingstroke modulation of wingbeat frequencies in a resonant spring-wing system is potentially costly because muscles must work against the elastic flight...

Plasticity of the gastrocnemius elastic system in response to decreased work and power demand during growth

Suzanne Cox, Jonas Rubenson, Stephen Piazza, Matthew Salzano, Kavya Katugam & Adam DeBoef
Elastic energy storage and release can enhance performance that would otherwise be limited by the force-velocity constraints of muscle. While functional influence of a biological spring depends on tuning between components of an elastic system (the muscle, spring, driven mass, and lever system), we do not know whether elastic systems systematically adapt to functional demand. To test whether altering work and power generation during maturation alters the morphology of an elastic system, we prevented growing...

Functional traits explain the consistent resistance of biodiversity to plant invasion under nitrogen enrichment

Shao-Peng Li, Jia Pu, Shu-Ya Fan, Yingtong Wu, Xiang Liu, Yani Meng, Yue Li, Wen-Sheng Shu, Jin-Tian Li & Lin Jiang
Elton’s biotic resistance hypothesis, which posits that diverse communities should be more resistant to biological invasions, has received considerable experimental support. However, it remains unclear whether such a negative diversity–invasibility relationship would persist under anthropogenic environmental change. By using the common ragweed (Ambrosia artemisiifolia) as a model invader, our four-year grassland experiment demonstrated consistently negative relationships between resident species diversity and community invasibility, irrespective of nitrogen addition, a result further supported by a meta-analysis. Importantly,...

Bulk and amino acid nitrogen specific isotope data from particulate organic matter and mesozooplankton (1000-2000 µm) from the Mekong River plume and southern South China Sea

Natalie Loick-Wilde, Sarah Weber, Joseph P. Montoya, Melvin Bach, Hai Doan-Nhu, Ajit Subramaniam, Iris Liskow, Lam Nguyen-Ngoc, Dirk Wodarg & Maren Voss
The mean trophic position (TP) of mesozooplankton largely determines how much mass and energy is available for higher trophic levels like fish. Unfortunately, the ratio of herbivores to carnivores in mesozooplankton is difficult to identify in field samples. Here we investigated changes in the mean TP of mesozooplankton in a highly dynamic environment encompassing four distinct habitats in the southern South China Sea: the Mekong River plume, coastal upwelling region, shelf waters, and offshore oceanic...

Phylotranscriptomics points to multiple independent origins of multicellularity and cellular differentiation in the volvocine algae

Charles Lindsey, Frank Rosenzweig & Matthew Herron
The volvocine algae, which include the single-celled species Chlamydomonas reinhardtii and the colonial species Volvox carteri, serve as a model in which to study the evolution of multicellularity and cellular differentiation. Studies reconstructing the history of this group have by and large relied on datasets of one to a few genes for phylogenetic inference and ancestral character state reconstruction. As a result, volvocine phylogenies lack concordance depending on the number and/or type of genes (i.e.,...

De Novo Design of Peptides that Co-assemble into β-sheet Based Nanofibrils Dataset

Kong M. Wong, Xingqing Xiao, Yiming Wang, Dillon T. Seroski, Renjie Liu, Anant K. Paravastu, Gregory A. Hudalla & Carol K. Hall

Supporting data for: Gene-rich UV sex chromosomes harbor conserved regulators of sexual development (Carey et al., 2021)

Sarah Carey, Shenqiang Shu, John Lovell, Avinash Shenqiang, Florian Maumus, George Tiley, Noe Fernandez-Pozo, Kerrie Barry, Cindy Chen, Mei Wang, Anna Lipzen, Chris Daum, Christopher Saski, Adam Payton, Jordan McBreen, Roth Conrad, Leslie Kollar, Sanna Olsson, Sanna Huttunen, Jacob Landis, Norman Wickett, Matthew Johnson, Stefan Rensing, Jane Grimwood, Jeremy Schmutz … & Adam Healey
Non-recombining sex chromosomes, like the mammalian Y, often lose genes and accumulate transposable elements, a process termed degeneration. The correlation between suppressed recombination and degeneration is clear in animal XY systems, but the absence of recombination is confounded with other asymmetries between the X and Y. In contrast, UV sex chromosomes, like those found in bryophytes, experience symmetrical population genetic conditions. Here we generate and use nearly gapless female and male chromosome-scale reference genomes of...

Sensitivity analysis of the maximum entropy production method to model evaporation in boreal and temperate forests

Audrey Maheu, Pierre-Erik Isabelle, Laure Viens, Daniel F. Nadeau, François Anctil & Jingfeng Wang
The maximum entropy production (MEP) approach has been little used to simulate evaporation in forests and its sensitivity to input variables has yet to be systematically evaluated. This study addresses these shortcomings. First, we show that the MEP model performed well in simulating evaporation during the snow-free period at six sites in temperate and boreal forests (0.68 ≤ NSE ≤ 0.82). Second, we computed a sensitivity coefficient S representing the proportion of change in the...

Data from: Nanotransfection-based vasculogenic cell reprogramming drives functional recovery in a mouse model of ischemic stroke

Luke Lemmerman, Maria Balch, Jordan Moore, Diego Alzate-Correa, Maria Rincon-Benavides, Ana Salazar-Puerta, Surya Gnyawali, Hallie Harris, William Lawrence, Lilibeth Ortega-Pineda, Lauren Wilch, Ian Risser, Aidan Maxwell, Silvia Duarte-Sanmiguel, Daniel Dodd, Gina Guio-Vega, Dana McTigue, William Arnold, Shahid Nimjee, Chandan Sen, Savita Khanna, Cameron Rink, Natalia Higuita-Castro & Daniel Gallego-Perez
Ischemic stroke causes vascular and neuronal tissue deficiencies that could lead to significant functional impairment and/or death. Although progenitor-based vasculogenic cell therapies have shown promise as a potential rescue strategy following ischemic stroke, current approaches face major hurdles. Here we used fibroblasts nanotransfected with Etv2, Foxc2, and Fli1 (EFF), to drive reprogramming-based vasculogenesis, intracranially, as a potential therapy for ischemic stroke. Perfusion analyses suggest that intracranial delivery of EFF-nanotransfected fibroblasts led to a dose-dependent increase...

The evolution of two distinct strategies of moth flight

Brett Aiello
Across insects, wing shape and size have undergone dramatic divergence even in closely related sister groups. However, we do not know how morphology changes in tandem with kinematics to support body weight within available power and how the specific force production patterns are linked to differences in behavior. Hawkmoths and wild silkmoths are diverse sister families with divergent wing morphology. Using 3d kinematics and quasi-steady aerodynamic modeling, we compare the aerodynamics and the contributions of...

Data from: Virulent disease epidemics can increase host density by depressing foraging of hosts

Rachel Penczykowski, Marta Shocket, Jessica Housley Ochs, Brian Lemanski, Hema Sundar, Meghan Duffy & Spencer Hall
All else equal, parasites that harm host fitness should depress densities of their hosts. However, parasites that alter host traits may increase host density via indirect ecological interactions. Here, we show how depression of foraging rate of infected hosts can produce such a hydra effect. Using a foraging assay, we quantified reduced foraging rates of a zooplankton host infected with a virulent fungal parasite. We then parameterized a dynamical model of hosts, parasites, and resources...

Machine learning to extract muscle fascicle length changes from dynamic ultrasound images in real-time

Luis Rosa
B-mode ultrasound has become one-off, if not the main way of measuring muscle fascicle fiber lengths non-invasively. Yet, the gold standard for tracking these is still time-intensive hand-tracking, and even with semi-automated approaches, the process takes time and has to be done post hoc. Hence, towards greatly improving current processing capabilities by tracking these muscle fasicle lengths in real-time, we trained and optimized machine learning models with collected B-mode ultrasound data. We focused on soleus...

Data from: Consistently positive effect of species diversity on ecosystem, but not population, temporal stability

Qianna Xu
Despite much recent progress, our understanding of diversity-stability relationships across different study systems remains incomplete. In particular, recent theory clarified that within-species population stability and among-species asynchronous population dynamics combine to determine ecosystem temporal stability, but their relative importance in modulating diversity-ecosystem temporal stability relationships in different ecosystems remains unclear. We addressed this issue with a meta-analysis of empirical studies of ecosystem and population temporal stability in relation to species diversity across a range of...

Heterogenous susceptibility to R-pyocins in populations of Pseudomonas aeruginosa sourced from cystic fibrosis lungs

Madeline Mei, Jacob Thomas & Stephen Diggle
Bacteriocins are proteinaceous antimicrobials produced by bacteria which are active against other strains of the same species. R-type pyocins are phage tail-like bacteriocins produced by Pseudomonas aeruginosa. Due to their anti-pseudomonal activity, R-pyocins have potential as therapeutics in infection. P. aeruginosa is a Gram-negative opportunistic pathogen and is particularly problematic for individuals with cystic fibrosis (CF). P. aeruginosa from CF lung infections develop increasing resistance to antibiotics, making new treatment approaches essential. P. aeruginosa populations...

Comparative study of snake lateral undulation kinematics in model heterogeneous terrain

Perrin Schiebel, Alex Hubbard & Daniel I. Goldman

Programming Mechanics in Knitted Materials, Stitch by Stitch Data

Krishma Singal, Michael Dimitriyev & Elisabetta A. Matsumoto

Technology review and roadmap for inventorying complete streets for integration into pavement asset management systems

April Gadsby, & John Harvey
Complete Streets provide mobility for all modes of transportation including active transportation. Complete Streets are being implemented in the US and transportation agencies must maintain these assets, which requires bringing them into asset management systems. Many gaps exist to include Complete Streets in asset management, and there is no comprehensive plan for filling those gaps. This project developed a road map to fill those gaps. To create this roadmap, the study completed the following tasks:...

Adaptive shifts underlie the divergence in wing morphology in bombycoid moths

Brett Aiello, Milton Tan, Usama Bin Sikandar, Alexis Alvey, Burhanuddin Bhinderwala, Katalina Kimball, Jesse Barber, Chris Hamilton, Akito Kawahara & Simon Sponberg
The evolution of flapping flight is linked to the prolific success of insects. Across Insecta, wing morphology diversified, strongly impacting aerodynamic performance. In the presence of ecological opportunity, discrete adaptive shifts and early bursts are two processes hypothesized to give rise to exceptional morphological diversification. Here, we use the diverse sister-families Sphingidae and Saturniidae to answer how the evolution of aerodynamically important traits is linked to clade divergence and through what process(es) these traits evolve....

Dataset from: Warming effects on grassland productivity depend on plant diversity

Junjiong Shao, Xuhui Zhou, Kees Van Groenigen, Guiyao Zhou, Huimin Zhou, Lingyan Zhou, Meng Lu, Jianyang Xia, Lin Jiang, Bruce Hungate, Yiqi Luo, Fangliang He & Madhav Thakur
Aim: Climate warming and biodiversity loss both alter plant productivity, yet we lack an understanding of how biodiversity regulates the responses of ecosystems to warming. In this study, we examine how plant diversity regulates the responses of grassland productivity to experimental warming using meta-analytic techniques. Location: Global Major taxa studied: Grassland ecosystems Methods: Our meta-analysis is based on warming responses of 40 different plant communities obtained from 20 independent studies on grasslands across five continents....

FRET imaging and curvature data of freely moving C. elegans

Daniel Porto
The force - induced unfolding and refolding of proteins is speculated to be a key mechanism in the sensing and transduction of mechanical signals in the living cell. Yet, little evidence has been gathered for its existence in vivo . Prominently, s tretch - induced unfolding is postulated to be the activation mechanism of the t witchin/titin family of autoinhibited sarcomeric kinases linked to the mechanical stress response of muscle. To test the occurrence of...

Time-series drinking water metagenomes: Assemblies & MAGs

Solize Vosloo, Linxuan Huo, Christopher Anderson, Maria Sevillano & Ameet Pinto
Reconstructing microbial genomes from metagenomic short-read data can be challenging due to the unknown and uneven complexity of microbial communities. This complexity encompasses highly diverse populations which often includes strain variants. Reconstructing high-quality genomes is a crucial part of the metagenomic workflow as subsequent ecological and metabolic inferences depend on their accuracy, quality and completeness. In contrast to microbial communities in other ecosystems, there has been no systematic assessment of genome-centric metagenomic workflows for drinking...

Anatomy of a Selectively Coassembled Beta-sheet Peptide Nanofiber Dataset

Kong M. Wong, Qing Shao, Dillon T. Seroski, Yiming Wang, Renjie Liu, Anant K. Paravastu, Gregory A. Hudalla & Carol K. Hall

Large interannual variability in supraglacial lakes around East Antarctica (2014-2020)

Jennifer Arthur, Chris Stokes, Stewart Jamieson, Rachel Carr, Amber Leeson & Vincent Verjans
This dataset provides supraglacial lake extents and depths as included in the paper by Arthur et al. (in review, Nature Comms.) entitled " Large interannual variability in supraglacial lakes around East Antarctica". Please cite this paper if using this data. This dataset consists of (1) shapefiles of supraglacial lake extents around the East Antarctic Ice Sheet derived from Landsat-8 imagery acquired between January 2014 and 2020 and (2) rasters of supraglacial lake depths derived from...

Registration Year

  • 2021
    25

Resource Types

  • Dataset
    25

Affiliations

  • Georgia Institute of Technology
    25
  • Duke University
    2
  • East China Normal University
    2
  • Yunnan University
    1
  • University of Massachusetts Amherst
    1
  • University of Michigan-Ann Arbor
    1
  • The Ohio State University
    1
  • Université du Québec en Outaouais
    1
  • University of California, San Diego
    1
  • Center for International Forestry Research
    1