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- Biofilms (1)
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- Chloride (1)
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- Deicing salt (1)
- Diphenhydramine (1)
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- Neonicotinoids (1)
- Non-parametric Data Analysis (1)
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Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
Herbicide Management Alters Fungal Biomass And Community Composition In Great Lakes Coastal Wetlands, Erica Danae Lathers
Herbicide Management Alters Fungal Biomass And Community Composition In Great Lakes Coastal Wetlands, Erica Danae Lathers
Master's Theses and Doctoral Dissertations
Wetlands provide many ecosystem services, and invasive species and their management can alter these services. Plant responses to wetland management actions are typically monitored, but less is known about how soils respond. Phragmites australis, an invasive wetland plant, can alter soil conditions, potentially impacting soil microbial structure and function. We sampled soil communities in Great Lakes coastal wetlands in southeastern Michigan dominated by Phragmites and sites that had been previously invaded by Phragmites then treated with herbicide from 2011-2017, to understand how herbicide management alters soil fungal communities. We assessed microbial and fungal biomass, fungal community composition, greenhouse gas emissions, …
Soil And Compost Tea: A New Restoration Technique?, Carol E. Day
Soil And Compost Tea: A New Restoration Technique?, Carol E. Day
Master's Theses and Doctoral Dissertations
Historically, prairie restorations have lacked the plant diversity seen in remnant prairies. Most restoration practices focus on reestablishing the plant community but overlook the soil microbial community even though microbes are critical to habitat functioning. Developing techniques that increase soil microbes in prairie restorations is critical to ensuring diverse restored habitats. We compared how microbial communities differed between remnant and restored prairie sites. We also investigated if soil and compost teas could be used to reintroduce microbes to restored prairie soil and if the teas affected native plant establishment. We found significant differences in the levels of bacterial taxa between …
The Effects Of Low-Level Pharmaceuticals On Stream Biofilm Structure And Function Across A Land-Use Gradient In Streams Of The Huron River Watershed, Elizabeth Mae Stover
The Effects Of Low-Level Pharmaceuticals On Stream Biofilm Structure And Function Across A Land-Use Gradient In Streams Of The Huron River Watershed, Elizabeth Mae Stover
Master's Theses and Doctoral Dissertations
Pharmaceuticals and personal care products (PPCPs) are a contaminant class of worldwide concern. Their environmental omnipresence indicates they may be a potential source of global change, and ecosystem-scale impacts at non-lethal levels have not been fully explored. We used stream biofilms to assess ecosystem responses to PPCPs. Biofilms were cultivated in streams draining areas of different land use and then exposed to triclosan, diphenhydramine, and sulfamethoxazole-trimethoprim treatments. We found evidence that low levels of these PPCPs affected some, but not all, aspects of biofilm processes and bacterial community composition. Bacterial carbon uptake was reduced (p = 0.06) and we found …
The Effect Of Neonicotinoids On Apis Mellifera: A Revisit, Qingchen Liang
The Effect Of Neonicotinoids On Apis Mellifera: A Revisit, Qingchen Liang
Master's Theses and Doctoral Dissertations
Colony collapse disorder (CCD), which has caused high colony mortality rates in the European honeybee (Apis mellifera), is a pressing economical and ecological problem. I revisited Woodcock et al.'s (2017a) paper, "Country-specic Effects of Neonicotinoid Pesticides on Honey Bees and Wild Bees", in light of unsound statistical methods used in the original study. In the first part of this paper, I attempted to replicate the analysis underlying key findings in the original paper. In the second part, I reanalyzed the data using mostly non-parametric methods in order to obtain robust results. I did not find any evidence for a harmful …
Salt Retention In Wetland Soils And Effects On Dissolved Organic Carbon Export, Kayla Marie Mcguire
Salt Retention In Wetland Soils And Effects On Dissolved Organic Carbon Export, Kayla Marie Mcguire
Master's Theses and Doctoral Dissertations
Deicing salt runoff has negative effects on ecosystems. Wetland ecosystems can act as important filters for runoff pollution (e.g., nutrients), mitigating damage to plants and microbes. Wetlands are important sinks for nutrients and pollutants (e.g., road salt) and transformation spots for many nutrients including carbon. The interactions between deicing salt runoff and wetland soil carbon were explored by measuring chloride export and retention, dissolved organic carbon (DOC) export, and carbon quality using mesocosm experiments. Net retention of Cl- was highest in soils receiving high salt treatments (5.0 g/L NaCl), although percent retention of Cl- was greater in soils receiving moderate …