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4,175 results for “university”
Snail Shell Strength and Total Crush Force of a Northern Michigan Snail as a Function of Predation Risk at the University of Michigan Biological Station Stream Research Facility (5/31/23-8/1/23)
Many prey organisms respond to the non-consumptive effects of predators by altering their physiology, morphology, and behavior. These inducible defenses can create refuges for prey by decreasing the likelihood of consumption by predators. Some prey, as in marine mollusks, have been shown to alter their morphology in response to the presence of size-limited predation. To extend this work into the freshwater realm, we presented pointed campeloma snails (Campeloma decisum) to chemical cues from a natural predator, the rusty crayfish (Faxonius rusticus), to better understand how snail morphology changes under the threat of predation. The total force needed to crush shells, total shell length, aperture width, and total weight, along with changes to these three body measurements were recorded for each individual and used to quantify morphological changes as a function of risk. Snails exposed to crayfish chemical cues needed significantly more force to crush their shells than controls (p = 0.002). Total shell length was greater in crayfish exposed snails than control snails (p = 0.002), and snails in the crayfish treatment also showed significantly more change in shell length than control snails (p = 0.003). Similarly, aperture width was significantly greater in exposed snails (p = 0.002). However, exposed snails exhibited significantly less change in aperture width than controls (p = 0.017). Finally, we found that snails exposed to crayfish weighed significantly more than snails in the control (p = 0.0009). Thus, the results of this study show that morphology of gastropods is altered in the presence of predators, and this may be an antipredator tactic directly related to risk.
Kawe Gidaa-naanaagadawendaamin Manoomin Tribal-University Research Collaborative, University of Minnesota, Manoomin / Psiη (Wild Rice) Density Survey for Northern Minnesota and Wisconsin Waters
Wild Rice (Ojibwemowin: Manoomin; Dakodiapi: Psiŋ; Latin: Zizania palustris) abundance, harvest, and water level data, across the upper Great Lakes region collected by tribal organizations.
Protist Dispersal Detection: University of Michigan Biological Station, July 2024
This dataset contains the results of a field dispersal array assembled in Gates Bog, Pellston, Michigan. The data were collected by a graduate student, and consist of measurements of protist presence or absence in 1mL fluid samples taken from pitcher plants and centrifuge tubes in the array. The dataset contains both initial protist detection from the fluid samples, as well as detection after a 24 hour incubation period. The dataset also contains the positions of each plant and tube used for sample collection and their distances from the established source population at the center of the array. We used the purple pitcher plant, Sarracenia purpurea, as a model system to explore questions of specialist protist dispersal. Newly opened pitchers are sterile, providing virgin habitat open to community assembly of highly specialized protist species (Peterson 2008). The placement of a known community of protists at the center of an uncolonized array of habitat patches allows us to identify both sources and destinations of dispersing microbes in the array. The purpose of this study is to measure dispersal rates for a subset of pitcher plant protist species.
Understory percent cover, plant traits, canopy LAI, PAR, temperature, and soil moisture data at multiple time points for sites in the burn chronosequence and Indian Point forest at the University of Michigan Biological Station, Pellston, MI (2022-2023)
Community ecology has sought to understand the mechanisms by which plant communities are assembled through time and space. One prominent way to address how communities are assembled is by quantifying functional traits. While there is a tremendous body of literature on functional traits, debate persists about how to account for variation in measured traits. For example, intraspecific trait variation (ITV) can be equal to or greater than interspecific trait variation and ITV has also been found to vary greatly across years. Therefore, there is a need to account for variability in functional trait measures among and within species and through time to improve our understanding of community assembly. Chronosequences are a powerful tool to address temporal changes in community dynamics, however, the inclusion of understory plants in forest chronosequence studies is still relatively uncommon. Previous chronosequence studies have been primarily performed in grasslands or in a limited subset of forest types, so further work is needed in understory plant traits across other ecosystems and climates to improve trait-based understanding of understory plant communities through time. Additionally, because plant traits change as ecosystems age, community interactions are likely to change with ecosystem age. Interactions of particular interest are herbivory, arthropod predation, and the influence of plant traits on arthropod diversity.
Pitcher plant herbivory experimental data at the University of Michigan Biological Station, Pellston, MI 2024-2025
Coping with low-nutrient environments has led to the repeated evolution of plant carnivory. Given the repeated evolution of carnivory as well as the facultative nature of this otherwise costly trait, why are carnivorous plants not more speciose in wet, sunny, nutrient-poor sites? Recent evidence suggests herbivores may play an important role in limiting the success of plants with specialized nutrient acquisition strategies (e.g. nitrogen-fixing bacterial associates), as herbivores are drawn to more nutrient-rich plant tissue. To test this hypothesis in carnivorous plants, we conducted a factorial herbivore exclusion and prey addition experiment on Sarracenia purpurea, the purple pitcher plant. Specifically, we examined whether 1) plant growth rate is maximized at intermediate levels of prey intake, and 2) if this pattern is caused by preferential consumption by herbivores of plants with high nutrient intake. To test these hypotheses, we measured plant growth and herbivore damage on 110 pitcher plants (Sarracenia purpurea) growing at Mud Lake Bog near UMBS from June to August 2024. To measure effects of stored nutrients on plant growth and herbivory, we plan to collect 2nd year early season growth data in June of 2025.
The fate of a plant defense mutualism in a warming world at the University of Michigan Biological Station, Pellston, MI (2024-2026)
Mutualisms are vital to plant survival and reproduction, but climate warming has the potential to alter these interactions. One such mutualism involves foliar mites, which provide plants with defense by consuming harmful fungi. In exchange, plants offer protective structures on their leaves called domatia. Both mite and fungal communities are potentially temperature-sensitive, and warming may shift community composition, potentially altering trophic interactions between botch groups. However, the specific changes in mite and fungal community composition and their implications for plant-mite mutualism and plant performance remain unclear. To investigate the responses of both of these communities to warming, and the effects these changes will have on plants, I conducted a nested factorial field experiment with 96 P. serotina seedlings at the University of Michigan Biological Station. Plants were warmed using open top chambers, nested within which were fully factorial manipulations of the mite and fungal communities. Each group was manipulated using either pruning tar to exclude mites or Quilt fungicide to exclude fungi.
Floral Censuses and Surveys of Insect Visitors to Flowers, University of Michigan Biological Station, Summers 1984-1986
I investigated within- and between-year patterns of flowering phenology of plants and the insects that visited them in an isolated old field in northern Michigan, USA. The project goal was to document the dynamics of resource availabilty (each floral species produced nectar and/or pollen) and assess the implications of its temporal variation on the composition of the community of insects that exploited those resources. I censued the number of open flowers for each species in 50 4-m2 quadrats at 3- 5-day intervals from June-September 1984-1986, and in separate but contemporaneous surveys of the same quadrats recorded each insect species observed on any open flower. Census and survey details noted below.
GM Snow Study at the University of Michigan Biological Station, Pellston, MI (1982-1987)
Wet and dry deposition were monitored at the University of Michigan Biological Station, which is located near the northern tip of Michigan's lower peninsula, for three winters. Dry deposition was measured by both conventional bucket method and by measuring increases in concentration in snow samples. Average results of the two methods were in reasonable agreement. The cumulative wet and dry deposition quantities are in good agreement with snowpack accumulations until the first thaw period. Dry deposition to snow accounts for less than 15% of the total H+, SO4-2, NO-3, NH4+, and approximately 25% of the Ca2+, Mg2+, Na+, J+, and Cl-, during an average precipitation year. Snowpack measurements were also made under deciduous and red pine canopies. Decreases in H+ and NO-3 were observed under the red pine canopy. Snowmelt and runoff were studied during the 1986-87, 1983-84, and the 1982-83 winters at the University of Michigan Biological Station. For the 1982-83 and 1983-84 winters the first 50% of snowpack acidity was released in melt and rain water equal to 25% of the original snowpack water content. Interaction between the meltwater and the litter layer produced large changes in the concentrations of most species. Runoff to two streams had high SO4-2 and very low NO-3 concentrations. It is concluded that most of the NO-3 is either biologically utilized or retained in the ecosystem, even during the early snowmelt period at this site.
Aspen Forest Stem Map and Tree Census at the University of Michigan Biological Station, Pellston, MI 1974-2018
In 1974, a one hectare plot was established at the University of Michigan Biological Station to further understand successional trajectories of birch and aspen forests in northern Michigan. Trees with a DBH greater than 5 cm were inventoried and later, the location of the tree within the plot was documented by the UMBS resident biologist. Plots were remeasured 5 additional times by different groups at the station.
University of Kansas Field Station: Water level and ice cover at Frank B. Cross Reservoir (Kansas, USA) 1993 - 2016
This database is from regular monitoring of water level and surface ice cover at Frank B. Cross Reservoir, a small freshwater impoundment in northeastern Kansas (USA). Cross Reservoir, located at the University of Kansas Field Station near Lawrence (KS), has a 3-ha surface area and a maximum depth of 12 m. Measurements of water elevation and estimates of ice cover were made at semi-monthly intervals (i.e., roughly every two weeks). The first data were taken in December 1993, shortly after the reservoir was constructed and first filled to capacity. Water levels were measured relative to a permanent water control structure. Ice cover observations were visual estimates of the percent (%) surface of the reservoir covered with ice. Water level measurements and ice cover estimates are made at the same time. This database is updated periodically and maintenance is ongoing.
University of Michigan Biological Station Weather Observations 1980 to Present
This data set includes daily year-round weather measurements and observations recorded at the University of Michigan Biological Station (UMBS) from 1980-present. Data primarily serves the purpose of benefitting UMBS researchers needing access to weather data as a confounding variable. Parameters include maximum and minimum temperatures, precipitation, snowfall, snowpack, and estimated cloud cover and type recorded daily at approximately 08:00. Maximum and minimum temperatures were measured at the Biological Station campus with National Weather Service liquid-in-glass thermometers housed in a Weather Service (a.k.a., Cotton Region) shelter located on State Road. Precipitation was measured with either a Belfort Rainfall Transmitter 5915 or an ETI NOAH IV Total Precipitation Gauge in the “UV Field” located immediately northwest of the Biological Station campus. Snowfall and snowpack were also measured in the UV Field on snowboards using National Weather Service according to National Weather Service snow measurement guidelines. Cloud cover was estimated in oktas and classified into one of the ten basic cloud types.
Stem maps of eight 1 ha forest plots distributed around Ann Arbor, MI and around the University of Michigan Biological Station (UMBS)
In this project we established a network of forest inventory plots to gather the data needed to forecast future forest performance under global change. Data collected from forest inventory plots, i.e., size and location of individual trees from all ages and species, have been shown to be particularly useful to link tree species demographic rates (survival, growth, age at maturity, fecundity) with community characteristics (assemblages and species turnovers), and are also widely used to estimate biomass removal (logging) and biomass production (carbon sequestration).
Effect of the aspen leaf miner feeding damage on aspen leaf gas exchange and water relations from south-facing site on the University of Alaska Fairbanks campus: Fairbanks, Alaska 2018
This dataset addresses the effects of epidermal leaf mining by the aspen leaf miner (Phyllocnistis populiella) on the physiology and water relations of aspen leaves. The dataset contains measurements of gas exchange, water potential, water content, and delta13C of aspen leaves manipulated to bear leaf mining damage on the top (adaxial) leaf surface only, the bottom (abaxial) leaf surface only, or no mining damage.
University of Colorado MURC Observations from LAPSE-RATE
<p>This dataset contains meteorological data collected by the University of Colorado's Mobile UAS Research Collaboratory (MURC) vehicle during the 2018 LAPSE-RATE (Lower Atmospheric Profiling Studies at Elevation - a Remotely-piloted Aircraft Team Experiment) field campaign. Questions about the dataset should be addressed to Gijs de Boer (gijs.deboer@colorado.edu).</p>
University of Nebraska-Lincoln Unmanned Aerial System observations from LAPSE-RATE
<p>This dataset contains thermodynamic (pressure, temperature, humidity) measurements from the University of Nebraska-Lincoln unmanned aerial system multirotors during the LAPSE-RATE campaign from 14--19 July 2018. This dataset contains 171 files from two multirotors. File names are coded as per the LAPSE-RATE community standard naming agreement. See README_v1.txt for more information about the naming convention and other details.</p>
Deutsche wissenschaftliche Universal- und Hochschulbibliotheken: Gesamte Mittel und Ausgaben für Bücher, Zeitungen und Zeitschriften, Inflationsraten (2007-2012)
<p>This Dataset provides information about<br> a) the growth for books (including dissertations), scientific journals, magazines and newspapers in German academic libraries and university libraries<br> b) the expenditures for acquiring books (including dissertations), scientific journals, magazines and newspapers in German academic libraries and university libraries<br> c) the total resources in German academic libraries and university libraries<br> d) the inflation rates in Germany<br> between the years 2007 and 2012.</p> <p><br> Please pay attention to the readme-file (in English or German Language) for more information.</p>
Utrecht University Open Access Monitor: Methodology
<p>Methodology used for the Utrecht University Open Access Monitor, which attributes OA labels to peer reviewed journal articles registered by researchers in the UU CRIS and UMCU CRIS (PURE).</p>
The Heber-Serrure codex (Ghent, University Library, Ms. 1374)
<p><strong>The Heber-Serrure codex (Ghent, University Library, Ms. 1374)</strong></p> <p>This repository holds the raw XML data underlying the diplomatic edition of the Heber-Serrure codex (Ghent, University Library, Ms. 1374), a Middle Dutch miscellany, dating to the late fourteenth century. The edition was published in the series "Middelnederlandse verzamelhandschriften", under the auspices of the series' editorial panel. The present, digital edition follows the (TEI-inspired) MVN-guidelines developed by Peter Boot and Herman Brinkman, supported by a publicly available Oxygen framework (<a href="https://github.com/HuygensING/mvn-xml">Github</a>). The edition and the (Dutch-language) introduction can be consulted <a href="https://hbsr.mvn.huygens.knaw.nl/">online</a> (additionally archived through the <a href="https://web.archive.org/web/20230928080836/https://hbsr.mvn.huygens.knaw.nl/">Wayback Machine</a>). A IIIF-compliant, open-access facsimile of the manuscript can be consulted through the <a href="https://lib.ugent.be/catalog/rug01:000763342">website</a> of Ghent University Library. The material in this repository is shared under an open access-license (Creative Commons; CC-BY-SA 4.0) that encourages re-use but requires an explicit attribution. If you use this edition, please provide an appropriate scholarly citation, e.g.:</p> <blockquote> <p>Renée Gabriël & Mike Kestemont (eds). De Heber-Serrurecodex: Gent, Universiteitsbibliotheek, Hs. 1374. Diplomatische editie bezorgd door Renée Gabriël en Mike Kestemont, met een dialectologische analyse door Amand Berteloot. Middeleeuwse Verzamelhandschriften uit de Nederlanden XVII. Amsterdam, Huygens Instituut voor Nederlandse Geschiedenis en Cultuur van de Koninklijke Nederlandse Akademie van Wetenschappen, 2023. URL: hbsr.mvn.huygens.knaw.nl. DOI: 10.5281/zenodo.8385501.</p> </blockquote> <p><strong>English summary</strong><br> The Heber-Serrure manuscript (Ghent, University Library, Ms. 1374) is a miscellany containing Middle Dutch rhyming texts, mostly ethical and didactic in content. Although the manuscript is not explicitly dated or localized, there is ample reason to assume that the codex was compiled near the end of the fourteenth century in the Carthusian monastery of Herne (about 18 miles southwest of Brussels). For a variety of reasons, this codex deserves our attention (and a new, modern edition), as it continues to fascinate both philologists and book historians.</p> <p>Until now, the Heber-Serrure manuscript has been primarily valued because of the many unique texts which it contains, including sizable excerpts from the <em>Spiegel historiael</em> (the Middle Dutch adaption of Vincent of Beauvais’ <em>Speculum historiale</em>) as well as a number of rare strophic poems by Jacob van Maerlant, but also the <em>Rinclus</em>. All of these works have already been edited in the past, based on the Heber-Serrure codex. These historic editions, however, were often heavily critical in orientation and appeared in isolation from one another, thus hindering our view on the joint survival of these works, as well as the original context in which this book was produced and meant to function. The present diplomatic edition aims to correct this situation.</p> <p>From the point of book history too, the Heber-Serrure manuscript present us with a remarkable object for scholarly study: the manuscript only contains rhyming texts, but these have been copied as continuous prose, most likely to save space (and time). Moreover, the available evidence suggests that the text collection wasn’t copied from a prior witness: in this manuscript, we can almost literally peak over the scribe’s shoulder, because we are dealing with a ‘growth miscellany’ that was composed in distinct phases, even though these phases were not meticulously planned beforehand. The single scribe of the book also acted as the book’s compiler, thus enabling privileged insights into the dynamic process that led to the gradual expansion of the codex’s content.</p> <p>That we can place the composition of the Heber-Serrure manuscript relatively precisely (in Herne) is unusual for a vernacular medieval codex in the medieval Low Countries. A such, we are able to study the codex in relation to a large number of contemporary sources that were produced in the same monastic environment. The manuscript’s main and only scribe is currently known under the pen name ‘Speculum scribe’, named so after his most famous copy, the second part of the Middle Dutch <em>Speculum historiale</em> adaptation (<em>Spiegel historiael</em>) in Vienna, Ö.N.B. Cod. 13.708; the scribe’s historic identity has not been established (yet), although a large number of manuscripts survive in his handwriting.</p>
Phlorest phylogeny derived from Dunn et al. 2011 'Evolved structure of language shows lineage-specific trends in word-order universals'
<p>Cite the source of the dataset as:</p> <blockquote> <p>Dunn M, Greenhill SJ, Levinson SC & Gray RD. 2011. Evolved structure of language shows lineage-specific trends in word-order universals. Nature, 473(7345), 79-82.</p> </blockquote>
University Learning Management System xAPI data for the ILEDA project
<p>Anonymized data in xAPI format collected from learning management systems (Moodle and LAMS) for the ILEDA (2021-1-BG01-KA220-HED-000031121) project https://ileda.eu/ileda-project. The dataset contains 306,741 records of 829 individuals participating in eight different blended learning courses following either a flipped classroom methodology or a project-based learning methodology from four universities: University of Eastern Finland (Finland), University of León (Spain), Belgrade Metropolitan University (Serbia) and Sofia University (Bulgaria).</p>
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.