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Data set used in publication titled: All the light we cannot see: Climate manipulations leave short and long-term imprints in spectral reflectance of trees
(2024-12-10) Stefanski, Artur; Butler, Ethan B.; Williams, Laura J.; Bermudez, Raimundo; Guzman, J. Antonio; Larson, Andrew; Townsend, Philip A.; Montgomery, Rebecca A.; Cavender-Bares, Jeannine; Reich, Peter B.; astefans@uwsp.edu; Stefanski, Artur; ASCEND
Anthropogenic climate change, particularly changes in temperature and precipitation, affects plants in multiple ways. Because plants respond dynamically to stress and acclimate to changes in growing conditions, diagnosing quantitative plant-environment relationships is a major challenge. One approach to this problem is to quantify leaf responses using spectral reflectance, which provides rapid, inexpensive, and nondestructive measurements that capture a wealth of information about genotype as well as phenotypic responses to the environment. However, it is unclear how warming, and drought affect spectra. To address this gap, we used an open-air field experiment that manipulates temperature and rainfall in 36 plots at two sites in the boreal-temperate ecotone of northern Minnesota, USA. We collected leaf spectral reflectance (400-2400 nm) at the peak of the growing season for three consecutive years on juveniles (two to six years old) of five tree species planted within the experiment. We hypothesized that these mid-season measurements of spectral reflectance capture a snapshot of the leaf phenotype encompassing a suite of physiological, structural, and biochemical responses to both long- and short-time scale environmental conditions. We show that the imprint of environmental conditions experienced by plants hours to weeks before spectral measurements is linked to regions in the spectrum associated with stress, namely the water absorption regions of the near-infrared and shortwave infrared. In contrast, the environmental conditions plants experience during leaf development leave lasting imprints on the spectral profiles of leaves, attributable to leaf structure and chemistry (e.g., pigment content and associated ratios). Our analyses show that after accounting for baseline species spectral differences, spectral responses to the environment do not differ among the species. This suggests that building a general framework for understanding forest responses to climate change through spectral metrics may be possible, likely having broader implications if the common responses among species detected here represent a widespread phenomenon. Consequently, these results demonstrate that examining the entire spectrum of leaf reflectance for environmental imprints in contrast to single features (e.g. indices and traits) improves inferences about plant-environment relationships, which is particularly important in times of unprecedented climate change.
Data supporting the manuscript Role of microbial mats in bed evolution and the formation of sedimentary structures
(2024-12-05) Assis, Willian; Yang, Judy Q; wassis@umn.edu; Assis, Willian; University of Minnesota, Saint Anthony Falls Laboratory
This dataset contains the data collected and presented in the manuscript "Role of microbial mats in bed evolution and the formation of sedimentary structures". It includes the bed topographies along the centerline of the channel for each tested case. Additionally, it contains the matlab codes used to process the data.
Judicial Homicides Research By Robiner and Borgida
(2024-12-05) Robiner, William; Borgida, Eugene; borgi001@umn.edu; Borgida, Eugene
We conducted a systematic review of the incidence of homicides of U.S. judges to date. The psychological impact of violence on judges and, organizationally, how the judicial system responds to the threat of judicial homicide, remains a critical public policy issue. We reviewed various databases, news accounts, and the National Violent Death Reporting System to identify and compile cases of homicides of judges. Since the 1800s, 55 cases of homicides of judges were identified. Three cases, including one unique case, of judicial homicide were identified through the National Violent Death Reporting System (2003-2021) reflecting the relative newness of the database and incomplete state of reporting as well as the relative rarity of judicial homicides. Among these homicides, nearly all decedents were men. More than half of the homicides appeared to have a connection to work. Firearms were the most common method of attack. Although violence is not uncommon in U.S. courts, homicides of judges remain are relatively rare. Homicide nevertheless is an occupational hazard and potential threat for judges making it essential that public policy and effective security measures be employed to safeguard judges along with strategies for mitigating stress and providing coping resources for judges. We advocate for the development of a comprehensive national database that would be an invaluable data-driven resource for gauging risk and refining risk management policies in the judicial system. Such a database could be instrumental in proactively decreasing the incidence of homicides of judges.
Data and code for spectral canopy transmittance in diverse tree communities
(2024-12-02) Williams, Laura J.; Kovach, Kyle R.; Guzman Q., J. Antonio; Stefanski, Artur; Bermudez, Raimundo; Butler, Ethan E.; Glenn-Stone, Catherine; Hajek, Peter; Klama, Johanna; Moradi, Aboubakr; Park, Maria H.; Scherer-Lorenzen, Michael; Townsend, Philip A.; Reich, Peter B.; Cavender-Bares, Jeannine; Schuman, Meredith C.; laura.williams@westernsydney.edu.au; Williams, Laura
Light may shape forest function not only as a source of energy or a cause of stress but also as a context cue: plant photoreceptors can detect specific wavelengths of light, and plants use this information to assess their neighborhoods and adjust their patterns of growth and allocation. Here, we examined how the spectral profile of light (350-2200 nm) transmitted through tree canopies differs among communities within three tree diversity experiments on two continents (200 plots each planted with one to 12 tree species). This dataset includes data and metadata on canopy transmittance and leaf area index (LAI) measured on these plots as well as leaf-level transmittance measured for each species in monoculture plots. Data processing code and example analysis code are also provided.
Data for Catalytic Resonance Theory: Forecasting the Flow of Programmable Catalytic Loops
(2024-12-02) Murphy, Madeline; Noordhoek, Kyle; Gathmann, Sallye; Dauenhauer, Paul; Bartel, Chris; noord014@umn.edu; Noordhoek, Kyle; University of Minnesota Design of Materials on Computers Lab - Bartel Group; University of Minnesota Dauenhauer Group
This repository exists to share the data and scripts used in the paper "Catalytic Resonance Theory: Forecasting the Flow of Programmable Catalytic Loops" by Madeline Murphy, Kyle Noordhoek, Sallye Gathmann, Paul Dauenhauer, and Christopher Bartel. The bulk of the files are contained within the `programmable-loop-directionality` folder with additional detailed information presented in the `README.md` files of each subfolder. Here we also include zips containing each of the Random Forest models that were trained along with the full grid searches generated during the study.
Perennial Flax Data Files
(2024-11-25) Goodman, Elizabeth; Anderson, Neil O.; Tong, Cindy B.S.; ander044@umn.edu; Anderson, Neil; University of Minnesota Flower Breeding & Genetics Lab
Wild, perennial flax species (Linum spp.) are being domesticated for high-value agronomic and ornamental uses, with added ecosystem services benefits. Perennial flax ideotypes have recently been defined for oilseed, cut flower, fiber, pollinator, and garden (herbaceous perennial) breeding objectives, and are being used to drive selection within the Forever Green perennial flax breeding program. Oilseed: Breeding for non-shattering types, high oil and protein content, high alpha-linoleic acid content, large seed size, high yielding, 2x harvest/season; Fiber / Cut Flower: Coordinated breeding with cut flower objectives, to produce tall, long-stemmed genotypes with flowers at the top of the stems; for fiber: long strands suitable for weaving, textiles, or other products; for cut flowers: long postharvest vase life. Challenges include establishment, mechanical harvesting and weed control. Pollinator / Ecosystem Services: Perennial flax is a semi-evergreen, flowering plant commonly seen with numerous blue saucer-shaped flowers. With an early and long flowering period – from May to November – a field of these plants can provide local pollinator populations with food resources throughout the year. A research team is studying the pollinator benefits of perennial flax in Minnesota and elsewhere around the globe. Traits of interest include: pollinator type, diurnal and season visitation, pollen and nectar rewards, nectar sugar content (type and quantity). Other ecosystem services afforded by perennial flax include: drought and heat tolerance, perenniality (as far north as USDA Z3). Herbaceous perennial: colorful, continuous flowering herbaceous perennial hardy to USDA Z3, with edible flax seeds, blue flowers, and a spherical (mound) plant growth habit. Data sets herein support publications from project breeding and selection activities will advance the development of perennial flax as a new specialty crop in Minnesota by guiding future breeding and selection decisions.
Hop pedigree data
(2024-11-25) Rohwer, Charlie; rohw0009@umn.edu; Rohwer, Charlie; University of Minnesota Southern Research and Outreach Center, Horticulture
This is a tab-delimited .txt file detailing what is known about pedigrees for hop varieties and breeding materials, mainly from British, German, and USDA breeding programs. The data start with Salmon's release of Brewer's Gold in 1934 and end with the USDA release of Vista in 2021. The data contain named varieties and parents (where known), including a substantial number of selections with unknown male parentage. The pedigrees are based on published data and conversations with researchers in the US, Germany, Japan, and UK. Hops from breeding programs in Australia, New Zealand, Germany, and private breeders in the US are under-represented due to their proprietary tendencies. The information here were used to generate a poster available for sale from the UMN Bookstore (SKU: 2820000084149), a smaller version of which is available from the UMN Digital Conservancy (https://hdl.handle.net/11299/267835). Additional information is contained on these posters, including indications of which varieties are dwarf, similarities of Columbus, Tomahawk, and Zeus, and equivalence of Styrian Golding, US Tettnanger, and Fuggle.
Data supporting: Evaluation of a decade of management of a North American aquatic invasive species (Nitellopsis obtusa) highlights scale-dependent effectiveness and monitoring gaps
(2024-11-25) Glisson, Wesley; Nault, Michelle; Jurek, Chris; Fischer, Eric; Lund, Keegan; Bloodsworth Cattoor, Kylie; Londo, April; Hauck-Jacobs, Emelia; Egdell, Rod; McComas, Steve; Fieldseth, Eric; Larkin, Daniel; djlarkin@umn.edu; Larkin, Daniel; Minnesota Aquatic Invasive Species Research Center (MAISRC); Department of Fisheries, Wildlife and Conservation Biology
Nitellopsis obtusa (starry stonewort) is an invasive macroalga subject to substantial control efforts in the Midwestern United States; however, there has not been systematic evaluation of treatment effectiveness. We synthesized management approaches and outcomes using monitoring performed over a decade-long period across 38 lakes in Indiana, Wisconsin, and Minnesota. We compiled all available point-intercept (PI) survey data from lakes where N. obtusa was known to occur since the year the species was first discovered in each state (Indiana, 2008; Wisconsin, 2014; Minnesota, 2015) until 2018 (Indiana) and 2019 (Wisconsin and Minnesota). These data comprised raw survey and summary data from whole-lake PI surveys, as well as targeted sub-PI surveys within managed areas. We compiled all available information on N. obtusa management for the time periods encompassing the survey data. Management data were collected from: 1) pesticide application records (PARs; Minnesota), 2) chemical treatment and mechanical harvesting records (Wisconsin), 3) aquatic vegetation management plans (AVMPs; Indiana), and 4) direct knowledge of known management events (all states). We compiled as much information as possible for each management action on each lake. For hand pulling, we additionally compiled all available data on the biomass of N. obtusa removed during each event; we included all such data through 2022.
Data for Accelerated hydrolysis of amorphous polylactide containing salicylate additives
(2024-11-25) Rachita, Eric; Larison, Taylor; Hillmyer, Marc; Ellison, Christopher; cellison@umn.edu; Ellison, Christopher; Ellison Research Group; Hillmyer Research Group
Blends of amorphous-grade polylactide (PLA) with low levels of salicylic acid (SA), disalicylide (DS), or oligosalicylate (OS) were prepared using scalable melt processing techniques. The glass transition temperature (Tg), tensile properties, and shelf-life stability of the salicylate-containing blends were nearly identical to neat PLA (Tg = 56.3 °C). The inclusion of salicylate additives accelerated sample mass loss in artificial seawater at 50 °C by up to a factor of three as compared to neat PLA. Water uptake occurred after the PLA molar mass dropped below 15 kg/mol, corresponding to the point that the Tg of the remaining material dropped below 50 °C. The onset of mass loss was observed after PLA hydrolyzed into 2 kg/mol fragments, coinciding with leaching of SA and DS; OS remained in the blends for longer immersion periods. The rate of molar-mass loss in 1 wt.% salicylate-containing blends was up to twice as fast as the rate of neat PLA. Degradation-induced PLA crystallization occurred once Tg dropped below 50 °C and mass loss slowed after the degree of crystallinity (Xc) exceeded 50%. We conclude that a low concentration of carboxylic acid groups from salicylate-containing compounds is sufficient to enhance PLA degradability without sacrificing material performance.
Supporting Data for Design Guidelines for Luminescent Solar Concentrator Greenhouses in the United States
(2024-11-21) Loh, Kristine Q; Harbick, Kale; Eylands, Nathan J; Kortshagen, Uwe R; Ferry, Vivian E; veferry@umn.edu; Ferry, Vivian E
Agrivoltaic greenhouses combine controlled environment agriculture and photovoltaics in one plot of land to simultaneously address the global challenges of renewable energy and sustainable food production. Luminescent solar concentrators (LSCs) can benefit these systems by providing additional design flexibility, granting the ability to tune light transmission for plant growth while generating electricity. Herein, we determine design guidelines for the implementation of LSCs in agrivoltaic greenhouses given the two competing priorities of light used for crop yield or for energy generation. Using a comprehensive model, we evaluate the impact of LSC design choices on the greenhouse environment, energy generation, crop yield, and economic value in 48 locations across the contiguous United States. We show the PV coverage ratio and the greenhouse’s heating demands determine the energy offset provided by the LSC. For improving crop yield, luminophore selection should maximize transmitted red light. We demonstrate the sensitivity of the economic value to crop yield, thus dictating luminophore selection for optimizing plant growth. Based on current project technology costs, LSC greenhouses are as profitable as conventional greenhouses generally for states below 40 °N. Future improvements to LSC manufacturing may allow previously unprofitable LSC greenhouses to become economically viable in northern states. This work showcases the broad design space for LSCs in agrivoltaic systems and the strong potential of integrating LSCs into greenhouses.
MLC-CHEM code and data for A vertically-resolved canopy improves chemical transport model predictions of ozone deposition to north temperate forests
(2024-11-21) Vermeuel, Michael; Millet, Dylan; Farmer, Delphine; Ganzeveld, Laurens; Visser, Auke; Alwe, Hariprasad; Bertram, Timothy; Cleary, Patricia; Desai, Ankur; Helmig, Detlev; Kavassalis, Sarah; Link, Michael; Pothier, Matson; Riches, Mj; Wang, Wei; Williams, Sara; dbm@umn.edu ; Millet, Dylan ; University of Minnesota Atmospheric Chemistry Group
This data set includes model code, input, and output data to constrain the 1D Multi-Layer Canopy CHemistry and Exchange Model (MLC-CHEM) for simulations of ozone deposition over three north temperate forests across four field studies. These studies include The Flux Closure Study 2021, The Probing Ecosystem Responses Involving Notable Organics (PEcoRINO) study in 2020, The Chequamegon Heterogenous Ecosystem Energy-balance Study Enabled by a High-density Extensive Array of Detectors 2019 (CHEESEHEAD19) in 2019, and the Program for Research on Oxidants: Photochemistry, Emissions, Transport - Atmospheric Measurements of Oxidants in Summer (PROPHET-AMOS) in 2016.
Data for Extracellular Phosphate Modulation and Polyphosphate Accumulation by Corynebacterium matruchotii and Streptococcus mutans
(2024-11-21) Jones, Debarati; Jones, Robert S.; rsjones@umn.edu; Jones, Robert S; B-A-M (Biofilm-Apatite-Microbiome) Lab; School of Dentistry
An alternative and understudied microbial mechanism that may influence demineralization is the microbially mediated ion exchange of Ca2+ and orthophosphate (Pi), which alters the saturation state of the mineral species within the surface enamel. There is a need to examine the ability of members of the oral microbiome to modulate Ca2+ and Pi, which control mineral solubility, in order to effectively evaluate mineralization therapies to improve oral health. (2) Methods: Pi uptake was measured using an ascorbic acid assay during a BHI liquid culture growth of Corynebacterium matruchotii and Streptococcus mutans for up to 20 h. The initial and endpoint medium Ca2+ levels were measured using ICP-OES. Bacterial cells were examined at different growth stages using DAPI/polyP binding emission at 525 nm to detect the presence of internalized macromolecules of polyphosphates (polyP) that could drive Pi uptake. (3) Results: C. matruchotii (p = 0.0061) substantially accumulated Pi (3.84 mmol/L), with a concomitant formation of polyP. In contrast, S. mutans did not take up Pi or accumulate polyP. No significant Ca2+ drawdown in the media was observed in either strain. (4) Conclusions: This study suggests that when examining the future efficacy of prevention technologies to improve, in vitro assays may consider including specific oral bacteria capable of substantial Pi uptake.
Survival data from glioma-bearing French bulldogs treated with immunotherapy, stereotactic radiation therapy, sonodynamic therapy, and palliative care
(2024-11-21) Arnold, Susan; Taylor, Amanda; Hansen, Katherine; Agarwal, Vijay; Low, Walter; Pluhar, G. Elizabeth; saarnold@umn.edu; Arnold, Susan; University of Minnesota Canine Brain Tumor Program
This retrospective, multi-institutional study was conducted to examine survival outcomes in immunotherapy-treated French bulldogs compared to closely related breeds, and to French bulldogs treated with several other treatment modalities. French bulldogs treated with immunotherapy experienced significantly shorter overall survival (OS) than boxers and Boston terriers (132 vs. 221 days, respectively). French bulldogs treated with immunotherapy had no significant difference in OS compared to French bulldogs treated palliatively, whereas dogs treated with either a novel therapy involving sonodynamic therapy or stereotactic radiation therapy had significantly longer OS. This study provides evidence for an immunotherapy-resistant form of HGG in French bulldogs, suggesting that the breed harbors key molecular differences affecting the tumor and tumor-immune microenvironment and subsequent poor response to treatment.
Data for Membraneless Compartmentalization of Cell-Free Transcription-Translation by Polymer-Assisted Liquid-Liquid Phase Separation
(2024-11-20) Izri, Ziane; Noireaux, Vincent; noireaux@umn.edu; Noireaux, Vincent; Noireaux Lab
The data shared in this repository consists mainly of the collection of the original fluorescence microscopy pictures of the PSTXTL system presented in the manuscript together with the product of their processing and analysis. Those pictures were acquired through three different channels: Bright Field, FITC and Texas Red. The bright field images inform on the presence of phase-separated droplets, while the FITC and Texas Red channels inform on the content of the phase-separated droplets, depending on the fluorophores used. The results of the fluorometry analysis are also present in the data collection.
Data supporting Wolf predation on white-tailed deer before, during, and after a historically-mild winter in northern Minnesota
(2024-11-15) Gable, Thomas D; Homkes, Austin T; Bump, Joseph K; gable079@umn.edu; Gable, Thomas D; Voyageurs Wolf Project
In many southern boreal ecosystems of North America, wolves are the primary predator of white-tailed deer and white-tailed deer the primary prey of wolves. Further, wolf-deer systems have, and will continue to become more common as white-tailed deer range continues expanding northward in North America. Despite this, there is little information on kill rates of wolves on deer (i.e., the number of deer killed per wolf per unit of time)—a fundamental metric of wolf predation on deer—and how kill rates vary with deer density, wolf density, and environmental conditions. We estimated kill rates of wolves on deer before, during, and after a historically-mild winter in the Greater Voyageurs Ecosystem, Minnesota, USA. Kill rates of wolves on deer were low (0.009-0.018 deer/wolf/day) in fall, peaked in February (0.050 deer/wolf/day), and quickly declined to 0 deer/wolf/day by April. The kill rates of wolves on deer we observed in winter were some of the lowest kill rates of wolves on deer that have been documented. Wolves in the Greater Voyageurs Ecosystem appeared unable to catch and kill a sufficient number of deer to meet their daily energetic requirements during Winter 2023-2024, and thus most wolves likely lost weight during winter, a period when wolves are typically in peak physical condition. The rates of wolf predation we observed appeared to be well below those needed to decrease deer population density in the GVE. Thus, our work, in combination with numerous other studies, indicates winter conditions are the primary driver of deer population change in northern climates.
Transcriptomic data from RNA Sequencing of canine high grade glioma tumor samples
(2024-11-15) Arnold, Susan A; Pluhar, G. Elizabeth; Abrahante Llorens, Juan E; saarnold@umn.edu; Arnold, Susan; University of Minnesota Canine Brain Tumor Program
These files contain the raw data for bulk RNA sequencing performed on canine high grade glioma tumor samples. These samples were obtained from three breeds of dogs: French bulldogs, boxers, and Boston terriers. All dogs were enrolled in immunotherapy clinical trials within the University of Minnesota Canine Brain Tumor Program. They were obtained from two different time points relative to treatment: pre-treatment and post-treatment. Treatment consisted of surgical resection and immunotherapy. The purpose of these data are to provide a comprehensive profile of how canine high grade glioma transcriptomes change in response to immunotherapy treatment, and to determine if there are breed-associated changes in differential gene expression.
Data for Reexamination of the electronic phase diagram of doped NiS₂: Electronic, magnetic, and structural inhomogeneity across the Mott insulator-metal transition
(2024-11-04) Tao, Yu; Das, Bhaskar; Calder, Stuart; Day-Roberts, Ezra; Maiti, Moumita; Lee, Yeon; Komar, Caitlyn; Birol, Turan; Leighton, Chris; leighton@umn.edu; Leighton, Chris; Leighton Electronic and Magnetic Materials Lab; Chemical Engineering and Materials Science, University of Minnesota
Pyrite-structure NiS₂ is, in principle, a model antiferromagnetic Mott insulator that can be electron doped, hole doped, and bandwidth controlled. Despite decades of study, however, the electronic and magnetic behavior of NiS₂ have proven challenging to understand. Here, we build on recent advances establishing surface conduction in NiS₂ to completely reexamine the electronic phase behavior of electron- and hole-doped single-crystal Ni₁₋ₓCuₓS₂ and Ni₁₋ₓCoₓS₂. Magnetometry, heat capacity, neutron diffraction, and electronic transport measurements suggest that prior work missed vital details of the magnetic ordering in this system. While electron and hole doping rapidly increase the antiferromagnetic ordering temperature (by as much as 4-fold by x ≈ 0.1), signatures remain of antiferromagnetic and weak ferromagnetic ordering at the same temperatures as in undoped NiS₂. As these undoped ordering temperatures remain constant, the associated magnetic moments are diminished by doping, strongly implicating electronic/ magnetic phase coexistence across the Mott insulator-metal transition. Substantial structural changes and inhomogeneity accompany these evolutions, highlighting the importance of structural-chemical-electronic-magnetic coupling in NiS₂. The insulator-metal transition is also strongly electron/hole asymmetric, which we interpret with the aid of complementary dynamical mean-field theory results. These findings significantly revise and advance our understanding of the electronic phase behavior of this prototypical Mott insulator, highlighting the essential role of electronic, magnetic, structural, and chemical inhomogeneity across the Mott transition. This dataset contains all digital data in the published paper of the same name.
Supporting Data for Circular Dichroism of Distorted Double Gyroid Thin Film Metamaterials
(2024-11-04) McGuinness, Emily; Magruder, Benjamin; Dorfman, Kevin; Ellison, Chris; Ferry, Vivian; veferry@umn.edu; Ferry, Vivian; Department of Chemical Engineering and Materials Science, University of Minnesota
Strong circular dichroism (CD) has been reported in triply periodic, co-continuous gyroid thin films for certain orientations and surface terminations. However, processing of gyroid thin films introduces distortions experimentally, creating a mismatch between the structures created practically and those explored computationally. This work explores the impact of compression normal to the substrate (z-compression) with conserved volume in (110)-oriented plasmonic silver double gyroid thin films on CD using finite-difference time-domain (FDTD) simulations. As compression reaches fifteen percent and above, new features emerge including termination-dependent opposite-handed CD responses and, at larger compressions, shorter wavelength responses that span many surface terminations. The longest wavelength responses of the system red-shift with increasing compression. The top surface structure contributes strongly to the emerging opposite-handed features and red-shifting of wavelengths. However, the less surface termination dependent features arise from a mixture of contributions from the top surface and interior of the films. Interplay of these leads to CD-switching phenomena as a function of compression for certain terminations and wavelengths. When alternative methods are utilized to compress the system, such as compression with a Poisson’s ratio of 0.33 (comparable to polystyrene) or the generation of compressed equilibrium structures with non-affine strut changes via self-consistent field theory, similar optical responses persist. Overall, this study highlights the significant impact experimentally relevant distortions (especially compression and some non-affine structural shifts) can have on the CD response of block copolymer templated plasmonic double gyroid thin films, and provides mechanistic insight into the film interior versus surface contributions to the CD response during compression.
Complete data and code to generate datasets in: Occurrence and environmental data for aquatic plants of Minnesota from 1999-2018
(2024-07-15) Verhoeven, Michael; Larkin, Daniel J.; michael.verhoeven.mrv@gmail.com; Verhoeven, Michael; Minnesota Aquatic Invasive Species Research Center (MAISRC); Fisheries Systems Ecology Lab
A dataset (and multi-scale aggregations thereof) of point-level occurrences, relative abundances, and associated environmental data for macrophytes (freshwater plants) across Minnesota. The data encompass 3,194 surveys of 1,520 lakes and ponds performed over a 19-year timespan. A total of 372,091 points were sampled, across which 231 taxa were recorded. Macrophyte occurrence data and depth, as well as point-level relative-plant-abundance measures for a subset of surveys, were collated, cleaned, and joined to geospatial data and Secchi-depth measurements of water clarity, enabling light availability, a primary control on aquatic plant growth, to be estimated.
Eastern larch beetle reproductive success in western and subalpine larch
(2024-10-31) Picklo, Rose; Eidson, Erika; Steed, Brytten; Aukema, Brian; bhaukema@umn.edu; Aukema, Brian; University of Minnesota Forest Entomology Lab
Eastern larch beetle Dendroctonus simplex LeConte has been outbreaking for the past two decades in the Great Lakes region of North America, impacting approximately 400,000 hectares of eastern larch Larix laricina (tamarack) forest in Minnesota, United States, alone. Range expansions of some Dendroctonus species driven by climate change have occurred across North America as rising temperatures increase climatically suitable habitats across latitudes and elevations. The range of eastern larch beetle is currently sympatric to that of its host, eastern larch, but the insect could, in theory, eventually access ranges of other species of Larix native to North America. We compared host suitability of two potential novel hosts, western larch (Larix occidentalis Nutt.) and subalpine larch (Larix lyalli Parl.) against the beetle’s native host, eastern larch, using a reproductive success experiment conducted in cut bolts of all three species. We measured fertility, maternal gallery length, and offspring size and lipid content as metrics of reproductive success. We share data here upon publication of this work in the journal Frontiers in Forests and Global Change.