Browsing by Subject "wetland"

Now showing 1 - 10 of 10
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    Data and model code for assessing dabbling duck age ratios and corresponding environmental correlates in the North American Prairies, 1969-2015
    (2018-05-16) Specht, Hannah M; Arnold, Todd W; spech030@umn.edu; Specht, Hannah M
    Fecundity estimates for demographic modeling are difficult to acquire at the regional spatial scales that correspond to climate shifts, land use impacts or habitat management programs, yet are important for evaluating such effects. While waterfowl managers have historically used harvest-based age ratios to assess fecundity at continental scales, widely available age ratios from late-summer banding data present an underutilized opportunity to examine a regional fecundity index with broad temporal replication. We used age ratios from banding data and hierarchical mixed-effect models to examine how fecundity of five North American dabbling duck species was affected by temporal variation in hydrological cycles, intra- and inter-specific density dependence and alternate prey availability, and whether those relationships were consistent across a broad geographic area. The data and code for these analysis are included here.
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    Minnesota Pollution Control Agency Wild Rice Sulfate Standard Field Study: water, sediment, porewater, and observational data collected across Minnesota 2011-2013
    (2017-04-10) Myrbo, Amy; amyrbo@umn.edu; Myrbo, Amy
    This study was undertaken by the Minnesota Pollution Control Agency (MPCA) and University of Minnesota to improve the understanding of why wild rice (Zizania palustris, manoomin, psin) is observed to thrive only in waters with low sulfate (SO4), and to contribute to evaluation of Minnesota Rules 7050.0224, promulgated in 1973, which seeks to limit the exposure of wild rice to sulfate concentrations exceeding 10 mg/L. The dataset is now released as manuscripts using it are being published.
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    Minnesota Pollution Control Agency Wild Rice Sulfate Standard Mesocosm Study: Water, Sediment, and Porewater "Synoptic" Sampling 2013 and 2015
    (2017-05-30) Myrbo, Amy; amyrbo@umn.edu; Myrbo, Amy
    This dataset represents opportunistic, "synoptic" sampling of 30 experimental mesocosms for chemical parameters. The mesocosm experiments were undertaken by Dr. John Pastor (UMN-Duluth) and the Minnesota Pollution Control Agency (MPCA) to improve the understanding of why wild rice (Zizania palustris, manoomin, psin) is observed to thrive only in waters with low sulfate (SO4), and to contribute to evaluation of Minnesota Rules 7050.0224, promulgated in 1973, which seeks to limit the exposure of wild rice to sulfate concentrations exceeding 10 mg/L.The dataset is now released as manuscripts using it are being published.
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    Minnesota Restorable Wetland Index
    (2024-01-11) Johnson, Lucinda; Bartsch, Will; Kovalenko, Katya; Kloiber, Steve; Nixon, Kristi; wbartsch@d.umn.edu; Bartsch, Will; Natural Resources Research Institute
    The Minnesota Restorable Wetland Index (RWI) was developed by the Natural Resources Research Institute (NRRI) in collaboration with the Minnesota Department of Natural Resources (MN DNR). The RWI was developed statewide on a 3m grid by applying machine learning models to predict the location of existing and restorable wetlands based on hydrological, geomorphological, and geological variables. Post-processing was done to remove existing wetlands and smooth the results. This data layer replaces the original NRRI Restorable Wetland Inventory that was developed statewide on a 30m grid using a different methodology.
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    Proceedings of the 2nd Agricultural Drainage and Water Quality Field Day
    (2005-08-19) Strock, Jeffrey S.; Fausey, Norm; Kanwar, Ramesh; Skaggs, Wayne; Gupta, Satish; Moncrief, John
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    Proceedings of the 4th Drainage Water Management Field Day
    (2011-08-23) Strock, Jeffrey S.; Gupta, Satish; Sands, Gary; Ranaivoson, Andry; Hay, Chris; Talbot, Mike; Magner, Joe
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    Property tax: new Minnesota wetlands exemptions and credits
    (University of Minnesota. Agriculture Extension Service, 1980-01-14) Grant, Winston W
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    Reconnecting Communities to the River: Exploring Barriers to Benefits of a Restored Waterfront in a Post-Industrial Community
    (2023-05) Green, Sophia
    As a result of historic industry on the western Duluth waterfront, state, federal, and tribal partners worked to restore 240 acres of coastal wetland habitat in the bays of the St. Louis River estuary known as Kingsbury Bay and Grassy Point. The goals of the restoration projects were to restore coastal wetland quality and to improve user amenities such as trails, fishing piers, and bird-watching platforms. The restoration projects were completed in October 2021. During the same period, significant progress was made to complete a new river heritage trail known as the Waabizheshikana along the restoration area. Despite awareness that the restored wetlands can provide a variety of ecosystem services to local neighborhoods, which are socially vulnerable and have poor access to the waterfront, very little is known about neighborhood access to and community use of the restored green and blue spaces. This research study aims to understand community access to and use of the restoration areas through exploring the underlying barriers of use and access that are associated with safety, stigma, and connectivity. Historical policies were reviewed to curate a timeline of influential events that impacted community sense of place and cohesion. Additionally, survey instruments were utilized at specific sites to study community access, connectivity, and social barriers such as stigma and safety, to sites. This study found that historic decision-making in urban design and transportation planning of communities in the West Duluth region perpetuated inequalities in neighborhood green space quantity. Additionally, this study inferred differences in green space use by local and non-local communities. The outcomes from this study provided recommendations to support decision making in the field of urban planning, environmental justice, and restoration planning in postindustrial urban communities. More specifically the results will be shared with the interested stakeholders including the City of Duluth and Minnesota Department of Natural Resources. Other relevant audiences may include the Great Lakes National Program Office, whom are responsible for cleaning up Area of Concerns. Recommendations informed by this research intend to best support neighborhood connectivity to green and blue space so that restoration benefits such as ecosystem services may be actualized by existing underprivileged communities to promote community health and wellbeing.
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    Restorable Wetland Decision Support Data, 2014
    (2024-02-01) Johnson, Lucinda; Brady, Valerie; Erickson, Jeremy; Brown, Terry; Gernes, Mark; ljohnson@d.umn.edu; Johnson, Lucinda; Natural Resources Research Institute
    The Minnesota Restorable Wetland Decision Support Data were developed in combination with the Minnesota Restorable Wetland Index to: predict likely locations of restorable wetlands; locate highly stressed areas most in need of water quality or habitat improvement; prioritize areas that already are or are most likely to result in high functioning, sustainable wetlands; identify areas that will provide the greatest benefits in the form of water quality and habitat. Data include: Minnesota Restorable Wetland Decision Support - Viability, Minnesota Restorable Wetland Decision Support - Water Quality Benefits, Minnesota Restorable Wetland Decision Support - Habitat Stress, Minnesota Restorable Wetland Decision Support - Habitat Benefits, Minnesota Restorable Wetland Decision Support - Nitrogen Stress, and Minnesota Restorable Wetland Decision Support - Phosphorus Stress. This data had previously been available within the Minnesota Restorable Wetland Prioritization Tool (2013-2024).
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    Treatment Wetland Vegetation Harvesting for Phosphorus Removal in Upper Midwest Agricultural Watersheds
    (2019-12) Alsadi, Nadia
    Midwestern wetlands can provide a variety of ecosystem services to the surrounding landscape including nutrient retention. Although wetlands are often times sinks for phosphorus (P), accumulation of P in wetland soils, referred to as legacy phosphorus, can affect water quality when flushed out of a system. The prevention, management, or removal of stored soil P within treatment wetlands can be challenging for land managers, but P may be stored within plant biomass and removed by harvesting. In Minnesota, a small-scale edge-of-farm treatment wetland (Granada treatment wetland), a micro-scale experiment of 30 mesocosm wetland systems (University of Minnesota, St. Paul campus), and a large-scale flood water storage impoundment (North Ottawa Impoundment) were assessed. In the small scale Granada treatment wetland and the St. Paul mesocosm experiments, harvested wetland vegetation was compared in autumn for P retention within the above ground biomass. A wet prairie vegetation mix from the Granada treatment wetland was sampled from each cell within the wetland and various native Minnesota plants were tested in the mesocosms at different times of the year. The monoculture species in the mesocosm experiments ultimately removed more P per biomass than the wet prairie mixes at the Granada treatment wetland. Biomass was not witnessed to be a direct indicator of P removal per the species studied in our experiments. The time of season of harvest and correlated phosphorus content was found to be an indicative factor for phosphorus removal potential. The Granada treatment wet prairie vegetation mix removed phosphorus each season through harvesting in the fall with approximately 2.3 kg/ha removed by vegetation in 2017 and 3.2 kg/ha removed in 2018. From the 2017-2018 mesocosm experiments, both Schoenoplectus tabernaemontani and Scirpus fluviatilis removed approximately 1.6 g of P per tank or up to approximately 12 kg/ha of P. Both bulrush species removed more P than Calamagrostis canadensis, Spartina pectinata, and Carex stricta. In the large scale North Ottawa Impoundment (NOI), a 2014 Typha x glauca harvest was analyzed for P removal potential in which results indicated up to 2,564 kg of P removal from biomass harvesting, or approximately 3.11 kg/ha. Each site was also monitored for soil legacy phosphorus reductions. In the 2018 St. Paul mesocosm soil analysis, reductions of soil P after plant harvest significantly exceeded loading of P. This may indicate potential for legacy phosphorus reduction by removing vegetation. Harvesting vegetation in treatment wetlands based on phosphorus content within the shoots of selected species can be a successful management practice to reduce phosphorus accumulation over time. Currently, treatment wetland vegetation harvesting is not widely practiced in Midwestern agricultural watersheds; if treatment wetland design and harvests were cost-effective and compatible with surrounding farm systems, there may be potential for widespread application of harvesting vegetation for P removal. Harvesting treatment wetland vegetation annually may aid in reducing legacy phosphorus content within soil and may further prevent water quality degradation within agricultural watersheds at different scales.