Natural Nitrate Removal In Shallow Subsurface Stream Flows

As agricultural growth increases across the planet, more anthropogenic nitrate from fertilizers and sewage effluent is contributed to the aquatic system, exacerbating both ecosystem- and human-health issues. Nitrate is naturally processed and removed within the environment, and those processes have been observed in a segment of substrata and porewater below streams called the hyporheic zone (HZ). The interaction of stream water with groundwater can promote denitrification; however, the rate of nitrate reduction within the HZ is unknown. This study determined the extent of surface water-groundwater interactions in a HZ and assessed the nitrate reduction in this zone via monthly sampling of three wells inserted along the length of T3, a stream located in the agriculturally dominated, Central Illinois landscape. Samples were taken from 10, 20, 30, and 50 cm below the streambed, the stream, and a groundwater well from spring to fall of one year to assess the full mixing patterns and nitrate contributions of the landscape to the stream system. The chemical composition of the stream water, groundwater, and HZ waters were analyzed using an Ion Chromatograph and applied in a mixing-model. Results show that stream water and groundwater contribute proportionally inverting amounts to water flow through the depth of the HZ. The conservative ion chloride is a chemical indicator of mixing in waters, and in the studied HZ, chloride concentrations were 48.8% higher in surface water than groundwater, and a gradient of change between these two endmembers was observed along depth throughout the HZ. Reducing nitrate levels along depth can be positively correlated to this gradient of mixing in the HZ. This relationship supports that the mixing of surface water and groundwater that occurs along the depth of the HZ dilutes the surface water and removes its excess nitrate. A better understanding of how different water sources contribute to the HZ and how that water flows through this zone will better equip regulators and remediators to use streams and their hyporheic zones to remove excess nitrate from agricultural runoff, contributing to healthier ecosystems and drinking water.https://ir.library.illinoisstate.edu/urs2021geo/1001/thumbnail.jp

Supporting pharmacy education and research:

The UCL School of Pharmacy is celebrating its 180th anniversary (Figure1).  This article discusses how its library has supported the School in its teaching, research and public engagement.  There is an overview of the challenges and opportunities the library has faced with regards space, collection management, information literacy and non-traditional support, such as wellbeing and sustainability. Post-COVID developments, AI and the utilisation of the library’s important historic collections and archive are also described

The Effectiveness of an Artificial Floating Wetland to Remove Nutrients in an Urban Stream: A Pilot-Study in the Chicago River, Chicago, IL USA

Ever expanding urbanized landscapes are increasingly impacting streams that run through them. Among other stressors, urban streams often are host to elevated concentrations of nutrients, salts, and heavy metals. The pollutants, coupled with high temperatures, are drivers of ecosystem degradation in urban streams. The installation of artificial floating wetlands (AFWs) has been successful in mitigating the effects of urbanization in lakes and wastewater treatment ponds, but rarely have they been tested in streams. This pilot-study examined the ability of an AFW to improve water quality in an urban stream. The small, 90 m2 AFW was installed to improve the aquatic habitat and aesthetics of a small section of the Chicago River, Chicago, IL USA.Water samples and in-situ measurements were collected from the surface and at 0.3 m depth of upstream and downstream of the AFW. Samples were analyzed for nitrate-as-nitrogen, phosphate, chloride, and heavy metals. Comparison of upstream and downstream waters showed that the AFW lowered the concentrations of nitrate-as-nitrogen and phosphate during the growing season by 6.9% and 6.0%, respectively. Nitrate was also removed during the dormant season; however, phosphate was not removed during that time. Plant or microbial uptake of the nutrients are believed to be the dominant mechanisms in the growing season with denitrification serving as the primary pathway in the dormant season. Despite not having a measurable effect on the water temperature, the AFW was an effective means to reduce concentrations of nitrate and phosphorus, decreasing the potential for eutrophication

Identifying Wetland Availability and Quality For Focal Species of the Illinois Wetlands Campaign W-184-R-1

The purpose of the study was to estimate functional quality of wetlands for focal species of the Illinois Wetlands Campaign, including the following objectives: 1) Estimate wetland habitat quality during spring, summer, and autumn for focal species of the Illinois Wetlands Campaign; 2) Develop a model to predict wetland quality for focal species of the Illinois Wetlands Campaign relative to wetland and landscape characteristics.Illinois Department of Natural Resources Contract Number: RC09-13FWUIUC Subagreement Number: SIU Carbondale 15-01unpublishednot peer reviewedOpe

Dealing with mobility: Understanding access anytime, anywhere

The rapid and accelerating move towards the adoption and use of mobile technologies has increasingly provided people and organisations with the ability to work away from the office and on the move. The new ways of working afforded by these technologies are often characterised in terms of access to information and people ‘anytime, anywhere’. This paper presents a study of mobile workers that highlights different facets of access to remote people and information, and different facets of anytime, anywhere. Four key factors in mobile work are identified from the study: the role of planning, working in ‘dead time’, accessing remote technological and informational resources, and monitoring the activities of remote colleagues. By reflecting on these issues, we can better understand the role of technology and artefact use in mobile work and identify the opportunities for the development of appropriate technological solutions to support mobile workers

Wetland Management Strategies that Maximize Marsh Bird Use in the Midwest: Annual Performance Report Period: 1 July 2016 – 30 June 2017

We determined marsh bird use across a wide range of wetland types (e.g., emergent, non-vegetated, riparian), hydrologic regimes (e.g., temporary, seasonal, semi-permanent), management practices (e.g., active, passive, unmanaged), and past disturbance regimes (e.g., natural and restored, impounded and unimpounded) in Illinois during late spring and early summer in 2015–2017. Our objectives were to 1) compare marsh bird use of restored and natural wetlands, 2) determine characteristics of wetlands and the surrounding landscape that influence marsh bird use of restored and natural wetlands, 3) compare marsh bird use of wetland impoundments managed for waterfowl across a continuum of management intensities and strategies to predict how these actions can increase use by both waterfowl and marsh birds. Additionally, we surveyed marsh birds using the standard protocols on wetlands concurrently surveyed within the Illinois Critical Trends Assessment Program (CTAP) for comparison of methodologies. We will provide marsh bird and other wetland-associated bird data to the Midwest Avian Data Center and the Avian Knowledge Network (AKN) and other conservation partners.Our data will be used as a basis for establishment of multi-group management strategies for marsh birds in the Midwest. These data will be especially useful as the Illinois Department of Natural Resources (IDNR) finalizes their Wetlands Campaign and Conservation Strategy as part of the Illinois Comprehensive Wildlife Conservation Plan and Strategy (i.e., wildlife action plan; ICWCPS). Moreover, our research addresses several priorities outlined in the Midwest bird monitoring framework outlined by Koch et al. (2010), including furthering understanding of the ecology and conservation priorities for migrating birds, evaluating effectiveness of conservation actions such as wetland restoration, and increasing access to bird data relative to landscape characteristics for use in conservation planning.Unites States Fish and Wildlife Service Contract Number: F14AP00485unpublishednot peer reviewedOpe

Gravitational waves from high-power twisted light

Recent advances in high-energy and high-peak-power laser systems have opened up new possibilities for fundamental physics research. In this work, the potential of twisted light for the generation of gravitational waves in the high frequency regime is explored for the first time. Focusing on Bessel beams, novel analytic expressions and numerical computations for the generated metric perturbations and associated powers are presented. Compelling evidence is provided that the properties of the generated gravitational waves, such as frequency, polarisation states and direction of emission, are controllable by the laser pulse parameters and optical arrangements

Illinois Waterfowl Surveys and Investigations W-43-R-64 Annual Progress Report FY2017 Period: 1 July 2016 – 30 June 2017

Objectives 1) Inventory abundance and distribution of waterfowl, shorebirds, and other waterbirds (a minimum of 10 species and guilds) during autumn migration at a minimum of 30 sites along and nearby the Illinois and central Mississippi rivers, 2) Estimate waterfowl and other waterbird population sizes (a minimum of 10 species and guilds) during autumn migration using an aerial quadrat survey in the central Illinois River Valley for comparison with aerial inventories (Objective 1), 3) Investigate movement and population ecology of lesser scaup, canvasback, and other diving ducks by trapping and leg-banding a minimum of 1,000 individuals during spring migration along the Illinois and Mississippi rivers, 4) Investigate the ecology of American green-winged teal and gadwall by radio-marking a minimum of 40 individuals of each species during spring migration in and nearby the central Illinois River Valley, 5) Investigate movements and home range size of a minimum of 10 Canada geese during winter in and near the Greater Chicago Metropolitan Area (GCMA) of Illinois, 6) Determine habitat quality of a minimum of 50 wetland and deepwater polygons during spring, summer, and early autumn for migrating dabbling ducks, breeding wetland birds, and migrating shorebirds in Illinois, and 7) Distribute results and findings to site managers and biologists of the Illinois Department of Natural Resources (IDNR) and other state agencies, the Mississippi Flyway Technical Section, the Upper Mississippi River and Great Lakes Region (UMRGLR) Joint Venture, the U.S. Fish and Wildlife Service, other scientists and collaborators as requested, and the general public through oral presentations, popular articles, technical reports, and peer reviewed publications; make recommendations for future wetland management practices and research needs based on results and related research; contribute to regional conservation planning efforts during the project period as appropriate and requested.Illinois Department of Natural Resources, Division of Wildlife & U.S. Fish and Wildlife Service Contract Number: RC09-13FWUIUCunpublishednot peer reviewedOpe

Illinois Waterfowl Surveys and Investigations W-43-R-63 Annual Progress Report FY2016 Period: 1 July 2015 – 30 June 2016

Objectives 1) Inventory abundance and distribution of waterfowl and other waterbirds (a minimum of 10 species and guilds) during autumn migration at a minimum of 30 sites along the Illinois and central Mississippi rivers of Illinois, 2) Estimate waterfowl and other waterbird population sizes (a minimum of 10 species and guilds) during autumn migration using an aerial quadrat survey along the central Illinois River for comparison with aerial inventories (Objective 1), 3) Investigate the ecology of up to 50 gadwall and 50 American green-winged teal during spring migration in and near the central Illinois River valley of Illinois, 4) Determine breeding bird use of and nest density in a minimum of 10 moist-soil wetlands managed for waterfowl during summer in central Illinois, 5) Investigate the breeding ecology of a minimum of 50 sandhill cranes during spring and summer in northeastern Illinois consistent with an ongoing research project, 6) Investigate movements and home range size of a minimum of 10 Canada geese during winter in and near the Greater Chicago Metropolitan Area of Illinois, and 7) Determine habitat quality of a minimum of 100 wetlands and deepwater habitats during spring, summer, and early autumn for migrating dabbling ducks, breeding wetland birds, and migrating shorebirds in Illinois.Illinois Department of Natural Resources, Division of Wildlife & U.S. Fish and Wildlife Service Contract Number: RC09-13FWUIUCunpublishednot peer reviewedOpe

Wetland Management Strategies that Maximize Marsh Bird Use in the Midwest: Final Performance Report: F14AP00485

We sought to investigate marsh bird occupancy and abundance across a wide range of representative wetlands types, hydrologic regimes, management practices, and former disturbance regimes in Illinois. We hypothesized that characteristics of wetlands that were actively and passively managed for waterfowl would be positively correlated with marsh bird occupancy and abundance in Illinois during the migration and breeding seasons. Our specific objectives were to: 1) compare marsh bird use of wetland impoundments managed for waterfowl across a continuum of management intensities and strategies to predict how impoundment management actions can increase use by both groups; 2) compare marsh bird use of restored and natural wetlands; and 3) determine characteristics of wetlands and the surrounding landscape that influence marsh bird use of restored wetlands. Our results are important to understanding spatiotemporal, hydrological, and vegetative conditions suitable for multi-species management of wetlands. Moreover, our research provided information regarding the effectiveness of conservation actions, particularly wetland restoration in meeting conservation priorities for migrating birds.U.S. Fish & Wildlife Service Wildlife and Sport Fish Restoration Programsunpublishednot peer reviewedOpe