Browse Dissertations and Theses - Natural Resources and Environmental Sciences by Issue Date

• (1972)

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• (1996)
Three independent but interrelated experiments were conducted to investigate the effects of growing media, irrigation systems and NO3-N concentrations on geranium (Pelargonium hortorum) stock plant production cv "Yours ...

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• (1996)
The research in this thesis is made up of three related experiments, each concerned with nitrate (NO$\sb{3-})$ accumulation and reduction in hydroponically-grown lettuce (Lactuca sativa L.), and its relationship to various ...

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• (2000)
The characterization of spatial variability in soil properties is a prerrequisite to many activities, such as site specific management (i.e., precision farming), groundwater and solute tranport modeling, groundwater pollution ...

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• (2010-01-06)
The relationship between population and the environment holds an important role in research on the linkages between human society and ecological systems. Recent studies on population and the environment have turned research ...

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• (2010-01-06)
Correlated parameters are often expected when modeling a natural system. However, correlation among the variables often blurs the model uncertainty and makes it difficult to determine parameter sensitivity. In simple ...

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• (2010-01-06)
Urbanization is increasing at a rapid rate and creating novel environmental conditions for wildlife species, even in already human-altered landscapes. We need a better understanding of demographic and behavioral responses ...

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• (2010-01-06)
Wild berries are fundamental components of traditional diet and medicine for Native American and Alaska Native tribes and contain a diverse array of phytochemicals, including anthocyanins and proanthocyanidins, with known ...

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• (2010-01-06)
Illinois had been the major producer of horseradish in the United States for many years. Horseradish root production in Illinois had recently decreased due to a disease complex that causes root discoloration and rots. ...

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• (2010-01-06)
Several environmental stressors can impact the physiology and survival of fishes. Fish experience natural fluctuations in temperature and dissolved oxygen, but variations in these parameters due to anthropogenic sources ...

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• (2010-01-06)
Common terns currently are listed as endangered or threatened in many states, including Illinois, Vermont, Pennsylvania, Ohio, Wisconsin, Michigan, and New York, and a species of special concern by the U.S. Fish and Wildlife ...

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• (2010-01-06)
Increased urban land cover and more intensive agriculture in the Midwest have changed the landscape for wildlife species. Distributions of semi-aquatic mammals such as muskrats (Ondatra zibethicus) may respond to environmental ...

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• (2010-01-06)
Correlated patterns of abundance, activity, and composition are commonly observed between phytoplankton and bacterial communities. There are a number of potential explanations for correlated dynamics. Recent observations ...

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• (2010-05-18)
The distribution of Ixodes scapularis and Borrelia burgdorferi has continued expanding in Illinois over the past twenty years. However, the extent to which this tick vector and etiologic agent of Lyme disease has spread ...

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• (2010-05-18)
Parents play an important role in creating phenotypic variation in their offspring through genetic and environmental mechanisms. For example, mothers can influence their offspring via hormonally-mediated maternal effects. ...

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• (2010-05-18)
Strong correlations between bacterial communities and algal seasonal succession have been previously observed. In aquatic systems, dissolved organic carbon derived by algae is an important resource for bacteria. Light and ...

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• (2010-05-19)
Research from the last two decades has elucidated the importance of migration in the annual cycle of ducks, but many aspects of migration ecology remain poorly understood due to the difficulty of investigating movements ...

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• (2010-05-19)
Yellow-breasted Chats (Icteria virens) are a Neotropical migratory bird species that breeds in shrubland habitat in Illinois. Chats are a diurnally active species but males are known to sing often at night. This behavior ...

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• (2010-05-19)
The growth and survival of larval fish are influenced by a suite of biotic and abiotic factors. Because aquatic systems are characterized by strong heterogeneity in biotic and abiotic conditions along a vertical gradient, ...

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• (2010-05-19)
Phosphorus (P) in rivers and streams in the Mississippi River Basin (MRB) is a contributing nutrient to hypoxia in the Gulf of Mexico and impacts local water quality. Although nitrogen has been extensively studied and ...

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