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Early Round Goby (Neogobius Melanostomus) Invasion Into Lake Michigan Tributaries And Competitive Interactions With Two Native Benthic Fishes., Margaret Ann Malone
Early Round Goby (Neogobius Melanostomus) Invasion Into Lake Michigan Tributaries And Competitive Interactions With Two Native Benthic Fishes., Margaret Ann Malone
Master's Theses
The round goby is a prolific invasive species and is currently spreading into Great Lake tributary streams. There is a high potential for negative impacts on native benthic fishes in these stream habitats and the aim of this study is to assess the impacts of the round goby on two native darter species in particular (johnny darter and blackside darter). I review the history of round goby invasion in the Great Lakes and summarize hypotheses of the invasive characters of the round goby. Using game theory, I provide a G-function approach to understanding the outcomes of the round goby invasion …
Assessing The Success Of Outreach At Preventing The Movement Of Aquatic Invasive Species In Illinois, Ellen Anne Cole
Assessing The Success Of Outreach At Preventing The Movement Of Aquatic Invasive Species In Illinois, Ellen Anne Cole
Master's Theses
Overland transport of recreational boats is the major vector of dispersal for aquatic invasive species among North American waterbodies. These species have large economic and ecosystem impacts, and understanding their movement is essential to understanding the biodiversity and functioning of aquatic ecosystems across the continent. I surveyed Illinois boaters to determine patterns of recreational boat movement and the consistency with which boaters perform actions to prevent the spread of invasive species. Although most boaters perform these actions, a large minority do not and the network for invasive species spread on recreational boats still connects most waterbodies. Next, I interviewed managers …
History Of Freshwater Invasions In Illinois: Learning From The Past To Inform The Future, Abigail Jacobs
History Of Freshwater Invasions In Illinois: Learning From The Past To Inform The Future, Abigail Jacobs
Master's Theses
Rates of introduction and spread of non-native species continue to increase worldwide, with freshwater ecosystems highly impacted. Many non-native species crossed between the Great Lakes and Mississippi watersheds by traveling through waterways in Illinois. I assembled a comprehensive database of occurrences of aquatic non-native species (n=99) in Illinois inland waters. The arrival of non-native species accelerated since 1873. The Great Lakes Basin was the main source of established species into Illinois. From 1990-2012 the dominant vector was unintentional release of established species non-native to North America. Sixty of the 99 introduced species established. Eighteen established species had high or very …
Behavior And Ecosystem Effects Of The Invasive Asian Clam (Corbicula Fluminea) In Urban Streams, Kayla Turek
Behavior And Ecosystem Effects Of The Invasive Asian Clam (Corbicula Fluminea) In Urban Streams, Kayla Turek
Master's Theses
Invasive species can be detrimental to freshwater ecosystems. By completing laboratory and field studies to observe processes and behaviors of the invasive Asian Clam (Corbicula fluminea), I documented pathways whereby this invasive species impacts aquatic ecosystems under conditions typical of urbanized streams I found. The predominant pathways by which clams impacted nitrogen (N) cycling was through excretion thus increasing ammonium (NH4+) flux out of sediment and through bioturbation, which increased nitrate (NO3-) diffusion to the sediment and dinitrogen gas (N2) production (i.e., denitrification). The effect was greater under urban conditions, where C. fluminea population density and water column NO3- were …
Aquatic Macroinvertebrate Response To Invasion And Subsequent Removal Of Typha × Glauca From Great Lakes Coastal Marshes, Kimberly Anne Greene
Aquatic Macroinvertebrate Response To Invasion And Subsequent Removal Of Typha × Glauca From Great Lakes Coastal Marshes, Kimberly Anne Greene
Master's Theses
Aquatic macroinvertebrates are important in wetland ecosystems; many fish and wildlife species depend upon them for food resources and they aid in nutrient cycling. Wetland macroinvertebrate communities are influenced by plant community composition; as such, this study examined two implications of invasive hybrid cattail, Typha × glauca (Typha), on aquatic macroinvertebrate communities in northern Great Lakes coastal wetlands: 1) how the presence of nearly monotypic stands of Typha alters wetland aquatic macroinvertebrate communities and 2) how manual removal of Typha, via mowing and manual tilling, impacts these invertebrate communities along with wetland plant communities. I found that …
Soil Nutrient Changes Following A Typha X Glauca Invasion In A Great Lakes Coastal Wetland, Lane Marie Vail
Soil Nutrient Changes Following A Typha X Glauca Invasion In A Great Lakes Coastal Wetland, Lane Marie Vail
Master's Theses
Invasive species are one of the major threats to the integrity and health of Great Lakes coastal wetlands. Plant invaders, such as the hybrid cattail Typha x glauca, threaten wetlands, as they can cause shifts in ecosystem structure and function and modify biogeochemical cycles and nutrient availability. Cheboygan Marsh on the coast of Lake Huron is currently undergoing invasion by T. x glauca, and soils in T. x glauca-dominated areas of the marsh have greater soil carbon and nitrogen concentrations than in areas dominated by native vegetation. This study investigated whether T. x glauca is affecting the accumulation of carbon …