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Dissertations / Theses on the topic 'Insecticides – Environmental aspects – Alberta'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

McCluskie, Meg L., and University of Lethbridge Faculty of Arts and Science. "Environmentally sustainable grasshopper control in an ecologically protected habitat." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science 2005, 2005. http://hdl.handle.net/10133/273.

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Scientific literature indicates potential for using plant extracts to control arthropod pests thereby decreasing the amount of synthetic chemicals introduced into the ecosystem. The research presented below tested several control candidates in a field settig to determine if selected oils can be used to control grasshopper infestations. Two field studies tested the effects of five plant extract oils on grasshopper pests in southern Alberta: Rosmarinus officinalis, Cedrus deodorata, Melaleuca alternifolia, Eucalyptus globulus, and Azadirachta indica. Grasshopper abundance increased in the first

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2

White, Katrina Marie, and University of Lethbridge Faculty of Arts and Science. "Effects of fire on a prairie arthropod community." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2000, 2000. http://hdl.handle.net/10133/125.

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In this study, I addressed how a large-scale wildfire affected a prairie arthropod community in southern Alberta, Canada. First, I looked at the general effects of disturbance on the arthropod community. Second, I addressed how processes such as competition and secondary succession may have affected diversity in this arthropod community. Third, I determined how the arthropod community trophic structure was regulated. Results showed that the effect of disturbance on arthropods varies greatly by taxa. Factors, such as site, year, distance from disturbance edge, as well as the disturbance itself

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3

Lang, Cassandra C., and University of Lethbridge Faculty of Arts and Science. "Identification and metabolic characterization of host-specific enterococci for use in source-tracking faecal contamination." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2005, 2005. http://hdl.handle.net/10133/265.

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Metabolic were used to evaluate Enterococcus as an indicator of faecal pollution. Enterococci were isolated using m-Enterococcus agar and speciated using conventional biochemical tests. Forty percent of the isolates were identified and metabolically characterized by the automated Biolog system. The biochemical test scheme recognized 16 enterococcal species, while Biolog recognized nine. Both methods identified E. faecalis at the greatest frequency. Overall species frequencies varied between the two methods. Biolog was unable to identify 31% of the isolates; 7% of the isolates were unidentified

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4

Simpson, Lisa G. "Impact of long-term manure application on soil macronutrient levels in Southern Alberta." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Geography, c2010, 2010. http://hdl.handle.net/10133/3098.

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The role of manure applications on soil nutrient dynamics in years after manure applications cease has not been extensively studied. An investigation of two long-term manure trials in the Battersea Drain watershed in southern Alberta was undertaken in 2004 to determine changes in soil nutrient status three years after the initial study was completed. The investigation of the nutrient status of an intensive livestock operation was another component of the study. There was a significant decrease in levels of soil nitrogen, phosphorus and potassium in the plots that received manure application

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5

Patterson, Shane, and University of Lethbridge Faculty of Arts and Science. "The agronomic benefit of pulp mill boiler wood ash." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2001, 2001. http://hdl.handle.net/10133/127.

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Land application of wood ash is becoming more appealing, as a disposable alternative, to landfilling options. It is estimated that 110,000 tonnes of wood ash is produced annually in Alberta by cogeneration systems, a large percentage produced in Central and Peace River Regions of Alberta. Alkaline (pH-13) properties and nutrient content of wood ash provides an alternative for the acidic and nutrient deficient soils within these regions. The objective of this field study was to determine the effect wood ash applications would have under field conditions on: the chemical and physical properties

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6

Shrivastava, Vikram. "Creek water quality impacts : irrigation tailwaters and sewage discharges." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0006/MQ44277.pdf.

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7

Burles, Katie, and University of Lethbridge Faculty of Arts and Science. "Snowmelt energy balance in a burned forest stand, Crowsnest Pass, Alberta." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Geography, 2010, 2010. http://hdl.handle.net/10133/2562.

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Forested watersheds in western North America are subject to significant change from natural and anthropogenic disturbance, including wildfire. Forest canopy changes have subsequent impacts on sub-canopy snow processes. A simple, process-based point energy balance model was developed to quantify differences in energy balance characteristics between a burned and a healthy forest stand. Potential model uncertainties were identified using sensitivity analyses. Simulated snowmelt accurately recreated measured snowmelt, providing confidence in the model’s ability to simulate energy balance processes

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8

Long, Kevin D., and Thesis (University of Lethbridge Faculty of Arts and Science). "Methane fluxes from a northern peatland : mechanisms controlling diurnal and seasonal variation and the magnitude of aerobic methanogenesis." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2008, 2008. http://hdl.handle.net/10133/744.

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Continuous eddy covariance measurements were conducted for a 125 day period, throughout the 2007 growing season, in a northern Alberta peatland. Significant diurnal and seasonal variation in methane fluxes were observed. Diurnal variation in methane flux was suggested to be due to variation in soil temperature and methane convective flow through vegetation to the atmosphere. Seasonal variation in methane flux was associated with a variety of factors, most notably seasonal variation in the capacity for methane emission at 10 ºC (R10). The R10 values varied as a function of soil temperature and

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9

Nemeth, Michael W., and University of Lethbridge Faculty of Arts and Science. "Climate change impacts on streamflow in the upper North Saskatchewan River Basin, Alberta." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Geography, c2010, 2010. http://hdl.handle.net/10133/2477.

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This research focuses on the estimation of the impacts of climate change on water yield, streamflow extremes, and the streamflow regimes in the Cline River Watershed, and consequently, water availability for hydropower generation in this area. The Cline River Watershed comprises the flow into Lake Abraham, the reservoir for Bighorn Dam, is part of the upper North Saskatchewan River basin (UNSRB). This objective was achieved by parameterizing the ACRU agro-hydrological modelling system. After parameterization was complete, ACRU output was calibrated and verified against available observed data,

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10

Plese, Luis Pedro de Melo. "Utilização do conceito de fugacidade na previsão do comportamento ambiental do carbosulfan e do carbofuran na cultura do arroz irrigado." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257252.

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Orientador: Luiz Lonardoni Foloni<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Agricola<br>Made available in DSpace on 2018-08-04T06:05:15Z (GMT). No. of bitstreams: 1 Plese_LuisPedrodeMelo_D.pdf: 1119151 bytes, checksum: 71b0dc99bac0c1f913f9f77bc3014bc4 (MD5) Previous issue date: 2005<br>Resumo: A utilização de produtos fitossanitários para o controle de plantas daninhas, pragas ou doenças têm sido muito difundido em função da necessidade crescente da oferta de alimentos, limitação de áreas agricultáveis e disponibilidade de mão-de-obra. Os problemas gera

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11

Franz, Simone, and University of Lethbridge Faculty of Arts and Science. "The effect of cattle grazing in riparian areas on winter biodiversity and ecology." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Biological Sciences, c2009, 2009. http://hdl.handle.net/10133/2516.

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Livestock grazing in riparian habitats alters the vegetation structure, which has a detrimental effect on wildlife. This study examined the effect of cattle grazing in riparian habitats on winter bird biodiversity, small mammal biodiversity, and microclimate. Study sites were ungrazed, moderately grazed, and heavily grazed riparian habitats along the Oldman River, Alberta during winter 2005 and 2006. Bird species richness, individual abundance, and diversity indices were higher in ungrazed habitats than in grazed habitats. Deer mouse population sizes were not different except during spring 200

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12

Sonnenberg, Rob. "Development of aquatic communities in high-altitude mine pit lake systems of west-central Alberta." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Geography, 2011, 2011. http://hdl.handle.net/10133/3106.

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Reclamation on the Cardinal River and Gregg River coal mines includes the construction of mine pit lakes connected to stream environments. Key physical, chemical and biological parameters of these “truck and shovel” lakes and their streams were investigated, and hypotheses regarding ecosystems and populations were tested. Findings include: Sphinx Lake and Pit Lake CD exhibit meromictic (partial-mixing) tendencies, but still function in a similar fashion to shallower, natural sub-alpine lakes. Elevated selenium concentrations as high as 16 ug/g (dry weight) were recorded in Rainbow trout (O

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13

Lennox, Preston A. "Examining the impacts of stream channelization on salmonid and aquatic invertebrate communities of a fifth-order montane river." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Biological Sciences, c2012, 2012. http://hdl.handle.net/10133/3363.

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Stream channelization is a common form of anthropogenic disturbance, whose impacts on cold water salmonid communities have received little attention in comparison to the body of work demonstrating its negative effects on low land, warm water systems. Here, I compared the effects of stream channelization on fish and invertebrate communities and their habitats in disturbed and undisturbed cold-water mountain streams in southern Alberta. I demonstrate that stream channelization has imposed significant alterations to stream habitat, most notably a loss of deep habitat, and that these alterations h

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14

Brinkmann, Lars, and University of Lethbridge Faculty of Arts and Science. "Mercury biomagnification in the upper South Saskatchewan River Basin." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2007, 2007. http://hdl.handle.net/10133/742.

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In this thesis mercury concentrations in biota of the upper South Saskatchewan River Basin are assessed in three non-industrialized systems. Mercury levels in large sport fish (northern pike, walleye, lake trout) frequently exceeded the consumption limit of 0.5ppm. Goldeye and mooneye of the Oldman River and lake whitefish of Waterton Lakes were below 0.5ppm total mercury. Agricultural and urban effluents constituted no sources of significant mercury loadings to the Oldman River. A doubling of mercury biomagnification factors between longnose dace and their food suggests bioenergetic heterogen

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15

Gobeli, Amanda. "The Effects of Neonicotinoid Exposure on Embryonic Development and Organ Mass in Northern Bobwhite Quail." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc849707/.

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Since their emergence in the early 1990s, neonicotinoid use has increased exponentially to make them the world's most prevalent insecticides. Although there is considerable research concerning the lethality of neonicotinoids, their sub-lethal and developmental effects are still being explored, especially with regards to non-mammalian species. The goal of this research was to investigate the effects of the neonicotinoid imidacloprid on the morphological and physiological development of northern bobwhite quail (Colinus virginianus). Bobwhite eggs (n = 650) were injected with imidacloprid concent

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16

Goble, Tarryn Anne. "Towards the development of a mycoinsecticide to control white grubs (Coleoptera: Scarabaeidae) in South African sugarcane." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1001748.

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In the KwaZulu-Natal (KZN) Midlands North region of South Africa, the importance and increased prevalence of endemic scarabaeids, particularly Hypopholis sommeri Burmeister and Schizonycha affinis Boheman (Coleoptera: Melolonthinae), as soil pests of sugarcane, and a need for their control was established. The development of a mycoinsecticide offers an environmentally friendly alternative to chemical insecticides. The identification of a diversity of white grub species, in two Scarabaeidae subfamilies, representing seven genera were collected in sugarcane as a pest complex. Hypopholis sommeri

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17

Aponso, G. Lalith M. "Exposure and health risk assessment for farmers occupationally exposed to chlorpyrifos in Sri Lanka and drinking water and house dust analysis for chlorpyrifos." Thesis, 2001. http://hdl.handle.net/1957/29855.

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18

Sanei, Hamed. "Environmental geochemistry and petrology of the recent sediments from lakes in the vicinity of the coal-fired power plants in central Alberta, Canada." 2005. http://hdl.handle.net/1828/656.

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19

Missirian, Anouch. "Space matters: Quantifying ecosystem-mediated externalities." Thesis, 2020. https://doi.org/10.7916/d8-c4vj-x803.

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Economic and ecological processes interact with one another over both spatial and temporal dimensions.This dissertation explores four socio-ecological systems where space crucially matters for both economic and ecological outcomes. In the first chapter, a windborne chemical dictates the diffusion in space of a new agricultural technology. The second chapter dissects the notion of landscape complexity to find which of its components matter for the intensity of insect pressure in agriculture, and thus the use of insecticides. In the third chapter, the location of participants in an environmental

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20

Moate, Thomas F. "Total exposure profiles of azinphosmethyl and azinphosmethyl-oxon to orchard workers in the Pacific Northwest." Thesis, 1996. http://hdl.handle.net/1957/34603.

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21

Sadilkova, Regina Maria. "Sharing the range: the challenges and opportunities for sustainable ranching and habitat conservation in the municipal district of Pincher Creek." Thesis, 1998. http://hdl.handle.net/2429/8249.

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The broad scope and intent of this thesis is to contribute to the body of research and writing about the loss of agricultural land due to development and the transformation of rural agricultural communities. At the more specific level, through interviews and secondary research, this thesis considers municipal land use planning in Alberta under the revised 1995 Municipal Government Act in the Municipal District (MD) of Pincher Creek No. 9, where cattle ranching, wildlife, and now, acreages vie for land resources. The critical questions addressed are: What are the conflicts between ranchin

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22

Smyth, Clinton Ross. "High altitude coal mine reclamation: an ecological audit of regulatory requirements, planning information and participant attitudes." Thesis, 1995. http://hdl.handle.net/1828/6570.

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23

Ayles, Christopher P. "Regulation-induced channel gradation in the Peace River." Thesis, 2001. http://hdl.handle.net/2429/11963.

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River regulation imposes direct changes on flow and sediment delivery, producing a suite of downstream responses in channel morphology. On the Peace River in northern British Columbia and Alberta, the W.A.C. Bennett hydroelectric dam has reduced peak flows while leaving sediment load effectively unchanged. My research aims to identify systematic, regulation-induced patterns of channel gradation in the mainstem Peace and its tributaries below the dam. The significance of regulation within the natural variability of basin hydrology is assessed by comparing actual regulated river flows to s

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