Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 11 of 11 for “"Water resources science"”.
-
Targeting Audiences for Improved Lawn Management: Can Grouping Households Assist with Nonpoint Water Pollution Reduction
… are resource consumers and contributors to urban water pollution. At the landscape level, individual household choices regarding lawn management vary greatly, contributing to the detriment or protection of water resources. To better target household behavior change, we need to understand the …
-
How do the availability of fish and rice affect occupation and food security in the Lower Mekong Basin?
This study aims to contribute to our understanding of how rice and fish availability affect occupation and food security of people in the Lower Mekong Basin (LMB), including Cambodia, Lao PDR, Thailand, and Vietnam. The study focuses on subsistence and commercial fishers and farmers. The data …
-
Development and evaluation of methodologies for the classification of ecological communities.
… method investigating stream substrate with underwater videos. With it a desired large area can be covered, and the resulting videos can be archived and used for quantitative analysis. The third component of my dissertation, Chapters 4 and 5, relate to clustering methods. Chapter 4 investigates …
-
Three dimensional water quality modeling in a shallow lake with complex morphometry; implications for coolwater fish habitat under changing climate
… complex lakes usually have a significant water quality heterogeneity and hydrodynamic gradients that require a three dimensional (3D) model to accurately capture their temporal and spatial dynamics. The objectives of this research were to evaluate and apply a 3D coupled hydrodynamic and …
-
Effects of repeated early season herbicide treatments of curlyleaf pondweed on native macrophyte assemblages in Minnesota Lakes.
Non-native invasive species have the potential to cause various problems in small isolated ecosystems, these constraints are exemplified in the small, shallow, lakes of Minnesota. Curlyleaf pondweed (Potamogeton crispus L.) is one of the common occurring and most influential non-native invasive …
-
Closing the knowledge gap surrounding nitrogen cycling in Minnesota lakes
… in N2 supersaturation occurred throughout the water column in areas with both low and high dissolved oxygen levels, the latter being somewhat paradoxical given that denitrification has traditionally been considered an anaerobic process. To further understand where and when these different …
-
Diel and horizontal patterns in the densities of Bythotrephes, Chaoborus, and Leptodora in a Minnesota Reservoir
… Increases were likely driven by reduced water column net avoidance and nighttime diel vertical migration from a daytime refuge. Differences in nearshore to offshore density were variable, with marginally significant differences in the Bythotrephes distribution during the night (larger …
-
Past precipitation, watershed characteristics, and drought: interactive effects on watersheds of Northern California.
Forested watersheds in Western North America are experiencing more frequent drought due to climate change, which impacts drinking water resources and stresses vulnerable aquatic species. Watershed properties, such as aspect, elevation, soil type, vegetation composition, and stand age, are known to …
-
Optimizing a long-term monitoring program to track toxic cyanobacteria blooms in a Great Lakes estuary
… examine relationships between phytoplankton and water quality. Warm, late-summer temperatures were an important predictor of cyanobacteria, but nitrogen and other drought-mediated variables may have determined dominant cyanobacteria species, carrying implications in a changing climate. Analysis …
-
Biological Iron Limitation within Lake Superior's Watershed: Oligotrophic Algal Blooms Along a Land to Lake Gradient
Growing amounts of freshwater literature highlight phytoplankton iron limitation in systems of varying hydrology and trophic status. Furthermore, global trends of increased dissolved iron in lakes could play an important role in relieving iron limitation. Concurrent rises in oligotrophic harmful …
-
Characterizing spatial and temporal trends in fish community diversity in the inland lakes of Isle Royale, MI, USA
… but larger lakes became more dominated by cool-water species. Species gains and losses were associated with isostatic rebound rate, where lakes with fast and slow rebound rates tended to gain and lose species, respectively. Sculpin and stickleback species were most commonly lost, while blackchin …