Date of Graduation
Summer 2018
Degree
Master of Science in Biology
Department
Biology
Committee Chair
La Toya Kissoon-Charles
Abstract
Wetlands are often the ultimate destination of agrochemicals. The increased use of these pollutants has resulted in their increased transport, via runoff and spray drift, into wetlands. Atrazine, a commonly used herbicide, has been detected in surface water, groundwater, soil, and sediment, and has shown to have adverse impacts on aquatic biota, such as fish and amphibians. Few studies have reported on the relationships between atrazine and macrophytes. I measured atrazine concentrations in surface sediments in agricultural, conservation, and golf course ponds of southwest Missouri, and investigated how those concentrations might be related to macrophyte communities, and pond environmental characteristics. My study found that water pH, depth, open water area, and sediment organic matter content varied among ponds; while macrophyte cover, richness, water conductivity, atrazine concentrations, and sediment particle size were similar. Water pH and sediment organic matter content were found to be significant predictors of macrophyte composition and frequency, explaining approximately 27% of the variation. Water depth and open water area were found to be significant predictors of macrophyte presence-absence, explaining 25% of the variation. Lemna minor and Spirodela polyrhiza were found to be significant indicator species of conservation ponds; whereas Spirogyra spp. was a significant indicator species of golf course ponds.
Keywords
wetland ecology, ecotoxicology, ponds, macrophytes, atrazine
Subject Categories
Biology | Other Pharmacology, Toxicology and Environmental Health | Terrestrial and Aquatic Ecology
Copyright
© Christine Michelle Cornish
Recommended Citation
Cornish, Christine Michelle, "Macrophytes and Atrazine in Ponds of Southwest Missouri" (2018). MSU Graduate Theses. 3296.
https://bearworks.missouristate.edu/theses/3296
Open Access
Included in
Biology Commons, Other Pharmacology, Toxicology and Environmental Health Commons, Terrestrial and Aquatic Ecology Commons