Research
Wetland plant function and morphology
For my undergraduate research project I was fortunate to gain a closer look at wetland plant function and morphology using a system of 40 mesocosm plots. Because of the diverse set of ecological services that wetlands provide - stormwater retention, purification, nutrient cycling, and primary productivity.
The overall objective was to determine how functional wetland development, represented through plant community attributes (percent cover and above ground biomass) is affected by nitrogen enrichment for four plant diversity groups. In a real-world application, we wanted to identify how nutrient enrichment of urban wastewater may interact with community diversity to affect ecosystem functioning.
Spikerush
(Eleocharis obtusa)
Allegheny monkeyflower
(Mimulus regens)
Fox Sedge
(Carex vulpineoidea)
Soft Rush
(Juncus effusus)
Our findings showed that plant height and coverage within the tub was positively associated with nitrogen enrichment. Treated tubs experienced significantly greater plant growth. We also observed certain species, like Soft Rush, becoming more dominant (i.e., covering a larger percentage of area) than other species also planted in the tub at the same amount initially.
Urban wetlands serve as vital ecosystems within cities, performing crucial functions for both the environment and the local community. These wetlands act as natural filters, cleansing and purifying water by removing pollutants and improving water quality. They also provide habitats for diverse wildlife, promoting biodiversity and creating recreational spaces for people to enjoy nature in urban areas. Additionally, urban wetlands help mitigate flooding by absorbing excess rainwater, reducing the risk of damage to surrounding infrastructure.
Results of Research
2019
Moody, N., S. Dorsey, J. Wong, S. Schmidt, and C. Ahn. 2019. Responses of an established planted wetland vegetation community in a constructed stormwater wetland to a two-year nitrogen addition. Poster presented at The Society of Wetland Scientists Annual Meeting in Baltimore, MD.
2018
Dorsey, S., & C. Ahn. 2018. Morphological and growth responses of planted wetland macrophyte community to nitrogen enrichment in stormwater wetlands – a mesocosm study. Poster presented at George Mason University College of Science Undergraduate Research Colloquium in Fairfax, VA.