ScholarWorks@UMass Amherst

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  GIS data for mapping the Leigh Fermors’ journey through the southern Mani Peninsula, Greece, in 1951

  Rebecca M. Seifried and Chelsea A.M. Gardner

  GIS data created by mapping Patrick (Paddy) and Joan Leigh Fermor's journey through the Mani peninsula in 1951. The zip file contains 6 layers (in GeoJSON format) that can be used to display least-cost models of portions of their route, the hikes we carried out to recreate them, and our final interpretation of their route from start to finish.

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

  Michael S. Dimitriyev and Gregory M. Grason

  Supplementary code for solving the constraint equations that describe curved polymer brushes. Also contains software for analyzing the resulting solutions.

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  Invasion and Global Change Meta-analysis Data

  Bianca E. Lopez, Jenica M. Allen, Jeffrey S. Dukes, Jonathan Lenoir, Montserrat Vilà, Dana M. Blumenthal, Evelyn M. Beaury, Emily J. Fusco, Toni Lyn Morelli, Cascade J. B. Sorte, and 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 the titles and abstracts of the 5,662 returned papers and retained those that reported the ecological effects of: (a) one or more invasive species; (b) one or more GECs; (c) both invasive species and a GEC together; and (d) also reported data for a control treatment (no invasion and at current or ambient environmental conditions). From each study, we recorded data on means and variances of each measured response in the three treatments and control; the response measures (categorized into "response classes"); the introduced invasive species and hypothesized mechanism by which the invasion impacted the ecosystem; the type of GEC factor(s) manipulated; the ecosystem setting where the experiment took place (marine, terrestrial, or freshwater); and the type of experiment (laboratory/greenhouse, field, or mesocosm).

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  Winter malt barley growth, yield, and quality following leguminous cover crops in the Northeast United States

  Arthur Siller, Heather Darby, Alexandra Smychkovich, and Masoud Hashemi

  There is growing interest in malt barley (Hordeum vulgare L.) production in the Northeast United States. This crop must meet high quality standards for malting but can command a high price if these quality thresholds are met. A two-year field experiment was conducted from 2015–2017 to evaluate the impact of two leguminous cover crops, sunn hemp (Crotalaria juncea L.) and crimson clover (Trifolium incarnatum L.), on subsequent winter malt barley production. Four cover crop treatments –sunn hemp (SH), crimson clover (CC), sunn hemp and crimson clover mixture (SH+CC), and no cover crop (NC) – were grown before planting barley at three seeding rates (300, 350, and 400 seeds m^–2). SH and SH+CC produced significantly more biomass and residual nitrogen than the CC and NC treatments. Higher barley seeding rates led to higher seedling density and winter survival. However, the subsequent spring and summer barley growth metrics, yield, and malt quality were not different in any of the treatments. There is much left to investigate in determining the best malt barley production practices in the Northeast United States, but these results show that winter malt barley can be integrated into crop rotations with leguminous plants without negative impacts on barley growth, yield, and grain quality.

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  Load-Bearing Entanglements in Polymer Glasses

  Cynthia Bukowski, Tianren Zhang, Robert A. Riggleman, and Alfred J. Crosby

  Data for "Load-bearing entanglements in polymer glasses" Cynthia Bukowski, Tianren Zhang, Robert A. Riggleman, Alfred J. Crosby. 2021.

  Experimental and simulation data describing the mechanical response of glassy polymer blends in a thin film state. Blends are made of long and short chain polymers. The load-bearing entanglement network is quantified.

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  Freshwater Tidal Wetland Sediment Flux in the Hudson River, NY

  Kelly McKeon and Jonathan Woodruff

  This study primarily used a 16-year tidal flux dataset generated by the Hudson River National Estuarine Research Reserve (HRNERR) to generate highly detailed sediment budgets for two freshwater tidal wetlands in the Hudson River. Throughout this dataset, Tivoli North Bay is a marsh and files associated with it will be labeled TVN. Tivoli South Bay is a mudflat and files associated with this bay will be labelled TVS. The HRNERR dataset is publicly available through their centralized data management office at cdmo.baruch.sc.edu. To supplement the publicly available water level, turbidity, and suspended sediment concentration (SSC) data, we deployed additional current meters and water level loggers at openings to each bay, placed sediment traps on the marsh platform, and collected sediment cores in the mudflat. Tiltmeter, HOBO water level-logger, and ADCP current measurements are included here, as well as loss-on-ignition data from water filters and sediment traps, and Cs-137 values from sediment cores. We use the synthesis of these data with the HRNERR data to estimate net sediment import and export from both the marsh and the mudflat between 2004 and 2019.

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

  Evan Thaler, Jeffrey S. Kwang, and 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 Zones 14, 15, or 16.

  We used results from the topographic surveys and data from Lidar-derived elevation data to regionally scale estimates of soil loss and historically averaged erosion rates. For each county within the region, we calculated the historically averaged erosion rate and the modern erosion rate estimated by the USDA National Resources Inventory. The data for these analyses are provided as shapefiles.

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

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

  This file includes supplemental information for Beaury, E.M.*, Fusco, E.J., Allen, J.M., Bradley, B.A. Plant regulatory lists in the U.S. are reactive and inconsistent. Journal of Applied Ecology. The file contains the sources for regulated plant lists, the lists themselves, and summarized findings of the study (whether taxa are listed proactively or as climate change proactive). Metadata are included in the file.

  *corresponding author: Evelyn M. Beaury (ebeaury@umass.edu), 312B Holdsworth Hall, University of Massachusetts Amherst, Amherst, MA, 01002.

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  Source data for "Narrower Paleo-canyons Downsize Megafloods"

  Scott R. David, Isaac Larsen, and 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 scripts to analyze flood hydraulics and sediment routing, and to reproduce plots.

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

  Abhiram Reddy, Edwin Thomas, and Greg Grason

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

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

  Summary reports of Environmental Impacts Classification of Alien Taxa (EICAT) assessments of 87 invasive plants projected to shift their ranges into Vermont, New Hampshire, and/or Maine by 2050.

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  Date of planting and nitrogen management for malt barley production in the Northeast USA

  Arthur Siller, Masoud Hashemi, Alexandra Smychkovich, Caroline Wise, and Heather Darby

  There is an increasing market for locally grown malting barley (Hordeum vulgare L.) in the Northeast US. Malting barley must meet certain quality standards for acceptability in the brewing market. Up-to-date recommendations are needed regionally for adaptation to ongoing climate change. A two-year field experiment was conducted to assess the interactive influence of three dates of planting (5 Sept., 15 Sept, and 25 Sept.), two levels of fall N (0 or 28 kg ha^-1), and three levels of spring N (28, 50.5, and 73 kg ha^-1). No significant difference was detected in grain yield amongst the treatments. The date of planting and fall N application mainly affected crop growth while spring N impacted grain quality. Delayed planting led to better winter survival and reduced lodging and foliar disease. Fall N application reduced winter survival for the early September planting but had minimal other agronomic impacts. Increased spring N application rate increased grain protein and lowered falling number but there were no treatment differences in other quality parameters. Results indicated that late September planting, application of no fall N, and moderate spring N (28 kg ha^-1) resulted in highest agronomic N efficiency and grain quality for malting barley in Northeast.

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  The Paris Climate Agreement and future sea level rise from Antarctica

  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, and Andrea Dutton

  Three dimensional ice sheet model output for select model simulations in netCDF format.

  Please click the blue download button to download 3deg.nc (18MB).

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  Model data for 'CO₂ and Tectonic Controls on Antarctic Climate and Ice-Sheet Evolution in the Mid-Miocene'

  Anna Ruth Halberstadt

  This is the data repository associated with the manuscript "CO₂ and Tectonic Controls on Antarctic Climate and Ice-Sheet Evolution in the Mid-Miocene" containing all model output files relevant to the project. We use an ensemble of asynchronously coupled climate - ice sheet - vegetation model simulations spanning a range of CO₂ concentrations, Transantarctic Mountain uplift scenarios, and glacial/interglacial climatic conditions to identify climate and ice-sheet conditions consistent with Antarctic mid-Miocene terrestrial and marine geological records. Details about the content of the data repository can be found in the readme.txt file located in the repository.

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  Data for "Pleistocene megaflood discharge in Grand Coulee, Channeled Scabland, USA"

  Karin Lehnigk and Isaac Larsen

  This is the data repository associated with the manuscript 'Pleistocene megaflood discharge in Grand Coulee, Channeled Scabland, USA,' containing all code, input files, and output files relevant to the project. Details about the content of the data repository can be found in the readme.txt file located in the repository.

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  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, and Bethany Bradley

  Data collected from English-language articles published between 1999-2018 on the ten most studied invasive plants in the United States.

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  Data for Elastically-mediated Positioning of 2D Colloids

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

  Data for publication “Elastically-mediated Positioning of 2D Colloids” by Weiyue Xin, Hao Wu, Gregory Grason, Maria Santore, 2021.

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  Data for Autonomous snapping and jumping polymer gels

  Alfred J. Crosby, Yongjin Kim, and Jay van den Berg

  Data for publication "Autonomous snapping and jumping polymer gels" by Yongjin Kim, Jay van den Berg, and Alfred J. Crosby. 2020.

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  Massachusetts Beach Grain Size and Slope Data

  Jonathan Woodruff, Nicholas Venti, Stephen Mabee, Alycia DiTroia, and Douglas Beach

  This data repository contains grain size and beach face slope data from approximately 100 paired summer and winter transects collected along 18 separate beaches in southern New England. The study is focused to beaches of Massachusetts, which represents a particularly unique section of the Northeastern US coast in that it: 1) lies at the interface between New England’s paraglacial lowlands and Mid-Atlantic Coastal Plain, 2) spans both micro- and meso- tidal regimes, 3) encompasses a wide range of seasonally varying wave conditions, and 4) contains a diverse array of geomorphic and grain size characteristics. Between 2 and 10 intertidal transects were conducted for each of the sites depending on the length of the beach and accessibility. Transect positions were chosen at representative locations along the beach and equally spaced when possible. At each transect at least three separate samples were collected at near 1) high-tide, 2) mid-tide and 3) low-tide. When possible, additional samples were collected along berm crest, storm berms and dune. To assess seasonal variations in grain size distribution and slope, all transects along beaches were sampled and surveyed twice, once at the end of the summer and then revisited again at the end of the winter season. Surface sediments from the top 15-30 cm were collected from sites primarily composed of sand and pebbles (i.e. < 64 mm), and brought back to the University of Massachusetts in Amherst, MA for analysis. Exclusively sand samples were collected in 1-liter (1-quart) bags, predominantly sand samples were collected in 4-liter (1-gallon) bags and mixed sand and pebble samples in 19 -liter (5 gallon) buckets. Areas comprised primarily of cobbles and boulder (> 64 mm) were measured in the field using a gravelometer and standard pebble count technique. Sediment samples were washed and dried thoroughly to remove salt and debris (sticks, seaweed, etc.). Each sample was weighed and sub-divided into fractions greater and less than 4 mm. Distributions for grains greater than 4 mm were obtained via standard sieving techniques. Grain size distributions for sample fractions < 4 mm were measured on a CAMSIZER digital particle size analyzer capable of measuring particles between 30 μm and 4 mm. The elevation of each sampling location as well as inter-tidal beach slope for each transect was obtained using a using a Real Time Kinematic (RTK) GPS survey system or a total station survey system tied to local benchmarks.

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  Data for "Hydrogeologic and Geochemical Distinctions within Freshwater Brine Systems in Salar Environments"

  Lee Ann Munk, David F. Boutt, Brendan Moran, Sarah McKnight, and Jordan Jenckes

  All chemistry and striontium isotope data for the study, "Hydrogeologic and Geochemical Distinctions within Freshwater Brine Systems in Salar Environments".

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  Global Plant Invaders: a compendium of invasive plant taxa documented by the peer-reviwed literature

  Brittany B. Laginhas and Bethany A. Bradley

  The purpose of the global invaders database was to create a list of non-native, invasive plant species reported worldwide in the English language scientific literature reported in Web of Science.

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  Results from "Impact of Hydrostratigraphic Continuity in Heterogeneity on Brine-to-Freshwater Interface Dynamics; Implications from a 2-D Parametric Study in an Arid and Endorheic Basin"

  Sarah McKnight, David F. Boutt, and Lee Ann Munk

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  Data on Fossil Fuel Divestment Commitments through March 2018

  Tyler Hansen and Robert Pollin

  This dataset includes information on fossil fuel divestment commitments that took place as part of the fossil fuel divestment movement through Mar. 23, 2018. The dataset includes the following variables: name of organization, type of organization, home country of organization, type of divestment commitment, date of divestment commitment, and total assets under management of the organization committing to divest. Divestment commitment data was shared with the authors by 350.org. The authors verified and made corrections to two subsets of the data: organizations with assets under management of at least $1 billion which committed to fully divesting from all fossil fuels, and organizations with assets under management of at least $90 billion which committed to divesting from some, but not all, fossil fuels. 350.org granted permission for the data to be made public.

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  Data for "The Efficacy of Allocating Housing Growth in the Los Angeles Region (2006-2014)"

  Darrel Ramsey-Musolf

  This data set contains the data used in the descriptive and inferential analyses referenced in all tables, figures, and maps.

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  Dam Impoundments Sediment Mass – Tributaries to the Hudson River

  Brian Yellen and Jonathan Woodruff

  This repository contains data from sediment cores collected during 2017-2018 from 17 impoundments that are located on tributaries to the tidal portion of the Hudson River as part of a larger NERRs collaborative project entitled Dams and Sediment on the Hudson (DaSH). A companion dataset that contains sediment core data from Hudson tidal marshes is archived at UMass Scholarworks data repository. Sediment cores collected from impoundments behind dams were recovered via piston push coring, which tends to minimize compaction and be representative of true sediment thicknesses. The general workflow for cores included (1) splitting; (2) Itrax XRF scanning; (3) subsampling cores ~10 cm spacing; (4) drying and burning samples for percent water, organic, and mineral (Dean, 1974). Combusted samples were gently disaggregated with mortar and pestle and analyzed for grain size on a Coulter Laser Particle Size Analyzer. Basal sediments were identified by low organic content and a contrast in grainsize or sediment texture with overlying pond sediment. Sediment age was constrained by the construction date of the corresponding dam, when that information was available, and by ¹³⁷Cs chronology when absent. The small sediment masses present in most of these dams relative to expected masses based on regional sediment yield is representative of the small aggregate trapping of sediment by legacy mill dams in the Northeast US, highlighted in the manuscript “Watershed sediment supply and potential impacts of dam removals for an estuary,” submitted to Estuaries and Coasts in March, 2020.