42 Works

Bumble bee demographic data for functional linear models

Natalie Kerr, Elizabeth Crone, Neal Williams & Rosemary Malfi
1. Behavior and organization of social groups is thought to be vital to the functioning of societies, yet the contributions of various roles within social groups towards population growth and dynamics have been difficult to quantify. A common approach to quantifying these role-based contributions is evaluating the number of individuals conducting certain roles, which ignores how behavior might scale up to effects at the population-level. Manipulative experiments are another common approach to determine population-level effects,...

Hardware perceptron and ReLU measurements and results

Fatemeh Kiani & Qiangfei Xia
Recently, in-memory analog computing through memristive crossbar arrays attracted a lot of attention due to its efficient power consumption, area, and computing throughput. Using this computing method, different types of neural networks can be implemented for different applications. In such neural networks, memristors represent the synapses. However, in previous work, digital processors have been used to implement the activation functions or neurons. Implementing neurons using analog-based hardware further improves the power consumption, area, and throughput...

Real-time geographic settling of a hybrid zone between the invasive winter moth (Operophtera brumata L.) and the native Bruce spanworm (O. bruceata Hulst)

Jeremy Andersen, Nathan Havill, George Boettner, Jennifer Chandler, Adalgisa Caccone & Joseph Elkinton
Hybridization plays an important and underappreciated role in shaping the evolutionary trajectories of species. Following the introduction of a non-native organism to a novel habitat, hybridization with a native congener may affect the probability of establishment of the introduced species. In most documented cases of hybridization between a native and a non-native species, a mosaic hybrid zone is formed, with hybridization occurring heterogeneously across the landscape. In contrast, most naturally occurring hybrid zones are clinal...

A model for oceanic melt rates under ice shelves using a balance-flux approach (CHICO)

D. Pollard & R. DeConto
A two-layer model of thermohaline ocean circulation under Antarctic ice shelves is described that predicts sub-oceanic ice-shelf melt rates given the basin geometries and ocean temperatures and salinities at the ice edges. The model builds on a series of similar models, using an upper plume layer and adding a balance-flux approach that enables it to be used for evolving land-ocean geometries without the need to pre-define individual basin outlines. Results are compared to Antarctic melt...

Supplementary data, code, and other information for ‘Global Signatures and Dynamical Origins of the Little Ice Age and Medieval Climate Anomaly’ (Science, Mann et al. 2009)

M.E. Mann, Z. Zhang, S. Rutherford, R.S. Bradley, M.K. Hughes, D. Shindall, C. Ammann, G. Faluvegi & F. Ni
Global temperatures are known to have varied over the past 1500 years, but the spatial patterns have remained poorly defined. We used a global climate proxy network to reconstruct surface temperature patterns over this interval. The Medieval period is found to display warmth that matches or exceeds that of the past decade in some regions, but which falls well below recent levels globally. This period is marked by a tendency for La Niña–like conditions in...

Source Data for \"Block copolymers beneath the surface: measuring and molding complex morphology at the sub-domain scale\"

Abhiram Reddy, Edwin Thomas & Greg Grason

Plant regulatory lists in the U.S. are reactive and inconsistent - Appendix 1

Evelyn M. Beaury, Emily J. Fusco, Jenica M. Allen & Bethany A. Bradley

Supplementary data, code, and information for ‘Global-Scale Temperature Patterns and Climate Forcing Over the Past Six Centuries’ (Mann et al. 1998 – the first ‘Hockey Stick’ paper [MBH98])

M.E. Mann, R.S. Bradley & M.K. Hughes
Spatially resolved global reconstructions of annual surface temperature patterns over the past six centuries are based on the multivariate calibration of widely distributed high-resolution proxy climate indicators. Time-dependent correlations of the reconstructions with time-series records representing changes in greenhouse-gas concentrations, solar irradiance, and volcanic aerosols suggest that each of these factors has contributed to the climate variability of the past 400 years, with greenhouse gases emerging as the dominant forcing during the twentieth century. Northern...

Load-Bearing Entanglements in Polymer Glasses

Cynthia Bukowski, Tianren Zheng, Robert Riggleman & Alfred Crosby

North River and South River Estuary Tidal Marsh and Channel Sediment and Water Level Data

Hannah Baranes, Brian Yellen, Jonathan Woodruff, W Rockwell Geyer, Justin Richardson & Frances Griswold

Source Data for \"End exclusion zones in strongly stretched, molten polymer brushes of arbitrary shape\"

Michael Dimitriyev & Gregory Grason

Model data for 'C02 and Tectonic Controls on Antarctic Climate and Ice-Sheet Evolution in the Mid-Miocene'

Anna Ruth Halberstadt

Database of impact assessment summaries for 87 invasive plants likely to shift into northern New England with climate change

William Coville, Bridget J. Griffin & Bethany A. Bradley

Supplementary data, code, validation statistics, and other information for ‘Proxy-based reconstructions of hemispheric and global surface temperature variations over the past two millennia’ (PNAS, Mann et al. 2008)

M.E. Mann, Z. Zhang, M.K. Hughes, R.S. Bradley, S.K. Miller, S. Rutherford & F. Ni
Following the suggestions of a recent National Research Council report [NRC (National Research Council) (2006) Surface Temperature Reconstructions for the Last 2,000 Years (Natl Acad Press, Washington, DC).], we reconstruct surface temperature at hemispheric and global scale for much of the last 2,000 years using a greatly expanded set of proxy data for decadal-to-centennial climate changes, recently updated instrumental data, and complementary methods that have been thoroughly tested and validated with model simulation experiments. Our...

Source data for \"Narrower Paleo-canyons Downsize Megafloods\"

Scott R. David, Isaac Larsen & Michael P. Lamb
The data provided in this repository is the source data for "Narrower Paleo-canyons Downsize Megafloods". The repository contains 3 main directories: 1) Hydro_Models (hydrodynamic modeling data), 2) Topo_Reconstruction (topographic reconstruction data), and 3) Analysis_Scripts (data analysis scripts). The Hydro_Models directory contains all inputs, outputs, and python scripts used for the ANUGA flood simulations. The Topo_Reconstruction directory contains all inputs, outputs, and Matlab scripts used in the artificial neural network analysis. The Analysis_Scripts folder contains Matlab...

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...

Raw radiocarbon dates and stable carbon isotope values for individual bone specimens from Madagascar's Central Highlands.

Brooke Crowley, Laurie Godfrey, Karen Samonds & James Hansford
This commentary has no abstract.

Supplementary data, code, and information for ‘Northern Hemisphere Temperatures During the Past Millennium: Inferences, Uncertainties, and Limitations’ (Mann et al. 1999 – the second ‘Hockey Stick’ paper [MBH99])

M.E. Mann, R.S. Bradley & M.K. Hughes
Building on recent studies, we attempt hemispheric temperature reconstructions with proxy data networks for the past millennium. We focus not just on the reconstructions, but the uncertainties therein, and important caveats. Though expanded uncertainties prevent decisive conclusions for the period prior to AD 1400, our results suggest that the latter 20th century is anomalous in the context of at least the past millennium. The 1990s was the warmest decade, and 1998 the warmest year, at...

Data for « Does invasion science encompass the invaded range? A comparison of the geographies of invasion science versus management in the U.S. »

Lara Munro, Bridget Griffin, Brittany Laginhas & Bethany Bradley

Data for Elastically-mediated Positioning of 2D Colloids

Weiyue Xin, Hao Wu, Gregory M. Grason & Maria M. Santore

The Paris Climate Agreement and future sea level rise from Antartica

Robert M. DeConto, David Pollard, Richard B. Alley, Isabella Velicogna, Edward Gasson, Natalya Gomez, Shaina Sadai, Alan Condron, Daniel M. Gilford, Erica L. Ashe, Robert E. Kopp, Dawei Li & Andrea Dutton

Historical rates of soil erosion in the Midwestern U.S.

Evan Thaler, Jeffrey S. Kwang & Isaac J. Larsen
In the Midwestern U.S., erosion has caused native prairie remnants to become perched above surrounding farmland, providing an opportunity to measure historical soil loss. We conducted high-resolution topographic surveys across erosional escarpments at the boundary between 20 prairies and adjacent fields. Data were collected in 2016,2017, and 2019 in South Dakota, Nebraska, Minnesota, Iowa, and Illinois. Coordinates, elevation data, and transect number are given for each of the 20 locations. Coordinates are provided in UTM...

Invasion and Global Change Meta-analysis Data

Bianca E. Lopez, Jenica M. Allen, Jeffrey S. Dukes, Jonathan Lenoir, Montserat Vila, Dana M. Blumenthal, Evelyn M. Beaury, Emily J. Fusco, Toni Lyn Morelli, Cascade J. B. Sorte & Bethany A. Bradley
We conducted a global meta-analysis to investigate invasions, abiotic global environmental changes, and their combined effects on native species, communities, and ecosystems.We searched the Web of Science Core Collection for articles and reviews that were available in English through September 30, 2020. Search terms were chosen to identify papers reporting impacts of invasions with one of six abiotic global environmental changes (GECs: warming, nitrogen deposition, O2 depletion, drought, CO2 addition, and altered pH). We assessed...

Circumstellar gas and dust emission and mass loss from evolved stars.

David Hiriart

A reversal in sensory processing accompanies ongoing ecological divergence and speciation in Rhagoletis pomonella

Cheyenne Tait, Hinal Kharva, Marco Schubert, Daniel Kritsch, Andy Sombke, Jürgen Rybak, Jeffrey Feder & Shannon Olsson
Changes in behavior often drive rapid adaptive evolution and speciation. However, the mechanistic basis for behavioral shifts is largely unknown. The tephritid fruit fly Rhagoletis pomonella is an example of ecological specialization and speciation in action via a recent host plant shift from hawthorn to apple. These flies primarily utilize specific odors to locate fruit, and because they mate only on or near host fruit, changes in odor preference for apples versus hawthorns translate directly...

Registration Year

  • 2021
    42

Resource Types

  • Dataset
    42

Affiliations

  • University of Massachusetts Amherst
    42
  • Pennsylvania State University
    8
  • University of Arizona
    5
  • Duke University
    2
  • George Washington University
    2
  • University of Vermont
    2
  • Roger Williams University
    2
  • Mount Holyoke College
    2
  • Woods Hole Oceanographic Institution
    2
  • University of California, Irvine
    2