66 Works

Data for A small native predator reduces reproductive success of a large invasive fish as revealed by whole-lake experiments

Przemyslaw G Bajer & Joshua R Poole

Spring 2022 University of Minnesota College of Liberal Arts First-Year Student Surveys

Emma Estrella, Ethan Voss, Isha Mody, Katie DeWitte, Arushi Roy, Chenwei Yan, Abbey Hammell, Alicia Hofelich Mohr, Alexander Hines & Emily Ronning

Failed despots and the equitable distribution of fitness in a subsidized species

Kristin Brunk, Kristin Brunk, Elena H. West, M. Peery & Anna Pidgeon
Territorial species are often predicted to adhere to an ideal despotic distribution and under-match local food resources, meaning that individuals in high-quality habitat achieve higher fitness than those in low-quality habitat. However, conditions such as high density, territory compression, and frequent territorial disputes in high-quality habitat are expected to cause habitat quality to decline as population density increases and, instead, promote resource matching. We studied a highly human-subsidized and under-matched population of Steller’s jays (Cyanocitta...

The eco-evolutionary history of Madagascar presents unique challenges to tropical forest restoration

Katherine A. Culbertson, Timothy L.H. Treuer, Ariadna Mondragon Botero, Tanjona Ramiadantsoa & J. Leighton Reid
High biodiversity and endemism combined with persistently high deforestation rates mark Madagascar as one of the hottest of biodiversity hotspots. Contemporary rising interest in large-scale reforestation, both globally and throughout Madagascar itself, presents a promising impetus for forest restoration and biodiversity conservation across the island. However, Madagascar may face unique restoration challenges due to its equally unique eco-evolutionary trajectory, which must be understood to enable successful ecological restoration. We conducted a systematic review of potential...

Serial thin section movie of every third section from the DTC to the distal extensions of Sh1 in a young adult hermaphrodite posterior gonad arm

Theadora Tolkin, Ariz Mohammed, Todd Starich, Ken C. Q. Nguyen, David H. Hall, Tim Schedl, E. Jane Albert Hubbard & David Greenstein
Gap-junctional signaling mediates myriad cellular interactions in metazoans. Yet, how gap junctions control the positioning of cells in organs is not well understood. Innexins compose gap junctions in invertebrates and affect organ architecture. Here, we investigate the roles of gap-junctions in controlling distal somatic gonad architecture and its relationship to underlying germline stem cells in Caenorhabditis elegans. We show that a reduction of soma-germline gap-junctional activity causes displacement of distal sheath cells (Sh1) towards the...

Using GBIF to Demonstrate Colonial Legacies on Biodiversity Data

Ryan S. Mohammed, Melissa Kemp, Michelle J. LeFebvre, Alexis M. Mychajliw, Grace Turner, Kelly Fowler, Michael Pateman, Maria A. Nieves-Colón, Lanya Fanovich, Siobhan B. Cooke, Liliana M. Dávalos, Scott M. Fitzpatrick, Christina M. Giovas, Myles Stokowski & Ashley A. Wrean
Biologists recognize the Caribbean archipelago as a biodiversity hotspot and employ it for their research as a “natural laboratory”, but do not always appreciate that these ecosystems are in fact palimpsests shaped by multiple human cultures over millennia. We discuss two case studies of the Caribbean’s fragmented natural history collections, the effects of differing legislation and governance by the region’s multiple nation states. We use digital natural history specimen data from GBIF to demonstrate how...

Flow and clay erosion data taken and processed at SAFL in a grid-turbulence tank Fall 2021-Spring 2022

Jorge E San Juan, William G Wei & Judy Q Yang

Antheridiogen controls spatial dynamics of sex‐expression in naturally occurring gametophytes of the tree fern Cyathea multiflora

Aidan Harrington, Jennifer Blake‐Mahmud & James Watkins
Background and aims: Antheridiogen systems are an important and widespread mechanism by which sex expression is controlled and genetic diversity maintained in fern gametophyte populations. However, antheridiogens have rarely been studied outside of the laboratory and little is known about their function in natural populations. Combining predictions based on field and laboratory study, we document the sexual structure of tree fern gametophyte populations and test the effects of antheridiogen in situ. Key results: In all...

Finding what you don’t know: testing SDMs methods for poorly-known species

Tom Radomski, David Beamer, Alan Babineau, Christa Wilson, Joseph Pechmann & Kenneth Kozak
Aim: A limitation of species distribution models (SDMs) is that species with low sample sizes are difficult to model. Yet it is often important to know the habitat associations of poorly known species to guide conservation efforts. Techniques have been proposed for modeling species’ distributions from few records, but their performance relative to one another has not been compared. Because these models are built and evaluated with small datasets, sampling error could cause severely biased...

Experimental realization of the 1D random field Ising model

Nicholas Bingham, Spencer Rooke, Jungsik Park, Alejandro Simon, William Zhu, Xiaoyu Zhang, Joseph Batley, Justin Watts, Chris Leighton, Karin Dahmen & Peter Schiffer
We have measured magnetic-field-induced avalanches in a square artificial spin ice array of interacting nanomagnets. Starting from the ground state ordered configuration, we imaged the individual nanomagnet moments after each successive application of an incrementally increasing field. The statistics of the evolution of the moment configuration show good agreement with the canonical one-dimensional random field Ising model. We extract information about the microscopic structure of the arrays from our macroscopic measurements of their collective behavior,...

On the hybrid origin of the C2 Salsola divaricata agg. (Amaranthaceae) from C3 and C4 parental lineages

Delphine T. Tefarikis, Diego F. Morales-Briones, Ya Yang, Gerald Edwards & Gudrun Kadereit
C2 photosynthesis is characterized by recapturing photorespiratory CO2 by RuBisCO in Kranz-like cells and is therefore physiologically intermediate between C3 and C4 photosynthesis. C2 can be interpreted as an evolutionary precursor of C4 and/or as the result of hybridization between a C3 and C4 lineage. We compared the expression of photosynthetic traits among populations of the Salsola divaricata agg. (C2) from humid subtropical to arid habitats on the coasts of the Canary Islands and Morocco...

Macaques preferentially attend to intermediately surprising information

Shengyi Wu, Tommy Blanchard, Emily Meschke, Richard Aslin, Ben Hayden & Celeste Kidd
Normative learning theories dictate that we should preferentially attend to informative sources, but only up to the point that our limited learning systems can process their content. Humans, including infants, show this predicted strategic deployment of attention. Here we demonstrate that rhesus monkeys, much like humans, attend to events of moderate surprisingness over both more and less surprising events. They do this in the absence of any specific goal or contingent reward, indicating that the...

Supporting data for Surface Structure Dependent Circular Dichroism in Single and Double Gyroid Metamaterials

Lenart R William, Christopher J Ellison, Vivian E Ferry & Bryan M Cote

Supporting data for 3D Printed Skin-Interfaced UV-Visible Hybrid Photodetectors

Michael C McAlpine, Xia Ouyang, Ruitao Su, Wai Hou Ng, Guebum Han & David R Pearson

Metapopulation-level associations in positively interacting stream fishes

Seoghyun Kim, Akira Terui & Christine Dolph
Positive biotic interactions are recognized as important factors determining species distributions. Although effects of positive interactions have often been observed at local scales, much less is known about consequences at larger spatial scales. Here, we study nest associations of stream fishes - widespread reproductive facilitation between host (nest-builder) and beneficiary (nest associate) species in North America - as a model system to examine the role of positive interactions in determining the metapopulation-level relationship between host...

Pastures and climate extremes: Impacts of cool season warming and drought on the productivity of key pasture species in a field experiment

Amber Churchill, Sally Power, Haiyang Zhang, Kathryn Fuller, Karen Catunda, Manjunatha Chandregowd, Chioma Igwenagu & Vinod Jacob
Shifts in the timing, intensity and/or frequency of climate extremes, such as severe drought and heatwaves, can generate sustained shifts in ecosystem function with important ecological and economic impacts for rangelands and managed pastures. The Pastures and Climate Extremes experiment (PACE) in Southeast Australia was designed to investigate the impacts of a severe winter/spring drought (60% rainfall reduction) and, for a subset of species, a factorial combination of drought and elevated temperature (ambient +3 °C)...

Nuanced qualitative trait approaches reveal environmental filtering and phylogenetic constraints on lichen communities

Natalia Koch, Daniel Stanton, Sandra Müller, Leandro Duarte, Adriano Spielmann & Robert Lücking
We propose that a qualitative trait approach based on more detailed nuanced traits may reveal previously overlooked patterns, especially when combined with phylogenetic perspectives. By sampling epiphytic lichens and using a functional approach based on nuanced qualitative traits, such as a much greater resolution over photobiont identity, type of cortex and chemical compounds, we evaluated the effects of environmental filtering and phylogenetic constraints on community assembly along natural succession of Atlantic rainforest. We found changes...

Moving beyond the diversity paradox: the limitations of competition-based frameworks in understanding species diversity

Anita Simha, Carlos Pardo-De La Hoz & Lauren Carley
Over the last century, ecologists have attempted to understand patterns of species diversity by showing stable coexistence arising from a baseline expectation of competitive exclusion. This expectation stems from an explicit assumption of resource scarcity and implicit assumptions of Malthusian struggle and winner-take-all dynamics. Fidelity to the competitive exclusion principle (CEP) presents species diversity as a paradox: if species compete for limited resources, how can they coexist? In this essay, we investigate the contradiction between...

Data for a preliminary molecular phylogeny of the family Hydroptilidae (Trichoptera): exploring the combination of targeted enrichment data and legacy Sanger sequence data

Robin Thomson, Paul Frandsen & Ralph Holzenthal
The purpose of this study is to provide a proof-of-concept that the use of molecular data, particularly targeted enrichment data, and statistically supported methods of analysis can result in the construction of a stable phylogenetic framework for the microcaddisflies (Trichoptera: Hydroptilidae). Here, we use a combination of targeted enrichment data for ca. 300 nuclear protein-coding genes and legacy (Sanger-based) sequence data for the mitochondrial COI gene and partial sequence from the 28S rRNA gene.

Collective ferromagnetism of artificial square spin ice

Nicholas Bingham, Xiaoyu Zhang, Justin Ramberger, Olle Heinonen, Chris Leighton & Peter Schiffer
We have studied the temperature and magnetic field dependence of the total magnetic moment of large-area permalloy artificial square spin ice arrays. The temperature dependence and hysteresis behavior are consistent with the coherent magnetization reversal expected in the Stoner-Wohlfarth model, with clear deviations due to inter-island interactions at small lattice spacing. Through micromagnetic simulations, we explore this behavior and demonstrate that the deviations result from increasingly complex magnetization reversal at small lattice spacing, induced by...

Data for \"Stability of Cubic Single Network Phases in Diblock Copolymer Melts\"

Pengyu Chen, Mahesh K Mahanthappa & Kevin D Dorfman
This dataset contains the self-consistent field theory (SCFT) simulation results and data for geometric analysis in "Stability of cubic single networks in diblock copolymer melts" by Chen et. al. (DOI: 10.1002/pol.20220318). SCFT was used to investigate the stability of cubic single and double network phases. Geometric analysis, including the calculations of mean curvatures and interfacial areas per unit volume of the domain interface, was used to understand the metastability of the single network phases. With...

Data from: Loss-of-heterozygosity facilitates a fitness valley crossing in experimentally evolved multicellular yeast

Beatriz Baselga-Cervera, Noah Gettle & Michael Travisano
These data sets are generated to investigate a simple evolutionary landscape that arises from underdominance at a single locus where the fitness valley consists of only one less-fit genotype. We make use of an experimental system previous evolved in the laboratory, the Saccharomyces cerevisiae snowflake system. This system was experimentally selected resulting in a significant evolutionary shift, the transition from uni-to-multicellularity in asexual diploid populations. We carried out the phenotypic and fitness characterization of the...

Roadside turfgrass seed mixtures: models and figures

Dominic Christensen
Roadsides in urban areas are often seeded with turfgrass mixtures to provide ground cover and reduce weed abundance. Designing mixtures to withstand exposure to biotic and abiotic stress is challenging. Research from managed and natural ecosystems have shown that increasing plant species richness and diversity can increase groundcover and suppress weed cover, but it is unclear whether such relationships hold in roadside environments. Our objective was to determine the effect of seeded turfgrass species richness...

Entropy driven order in an array of nanomagnets

Hilal Saglam, Ayhan Duzgun, Aikaterini Kargioti, Nikhil Harle, Xiaoyu Zhang, Nicholas Bingham, Yuyang Lao, Ian Gilbert, Joseph Sklenar, Justin Watts, Justin Ramberger, Daniel Bromley, Rajesh Chopdekar, Liam O’Brien, Chris Leighton, Cristiano Nisoli & Peter Schiffer
Long-range ordering, while typically understood as a decrease in entropy, can also be driven by increasing system entropy in certain special cases. We demonstrate that artificial spin ice arrays of single-domain nanomagnets can be designed to produce entropy-driven order. We probe thermally active tetris artificial spin ice, known to have a zero point Pauli entropy, both experimentally and through simulations. We find two-dimensional magnetic ordering in one subset of the nanomagnet moments, which we demonstrate...

Data and code from: Correlates of individual participation in boundary patrols by male chimpanzees

Anthony Massaro, Ian Gilby, Nisarg Desai, Alexander Weiss, Joseph Feldblum, Anne Pusey & Michael Wilson
Group territory defense poses a collective action problem: individuals can free-ride, benefiting without paying the costs. Individual heterogeneity has been proposed to solve such problems, as individuals high in reproductive success, rank, fighting ability, or motivation may benefit from defending territories even if others free-ride. To test this hypothesis, we analyzed 30 years of data from chimpanzees (Pan troglodytes) in the Kasekela community, Gombe National Park, Tanzania (1978-2007). We examined the extent to which individual...

Registration Year

  • 2022

Resource Types

  • Dataset


  • University of Minnesota
  • Yale University
  • University of Wisconsin–Madison
  • The University of Texas at Austin
  • Duke University
  • University of Maine
  • University of California, Berkeley
  • University of Illinois Urbana-Champaign
  • Ludwig-Maximilians-Universität München
  • California Polytechnic State University