Buchtel College of Arts and Sciences
Date of Last Revision
3100 499 - Senior Honors Program in Biology
Number of Credits
Bachelor of Science
Date of Expected Graduation
Ohio forests are threatened by the invasive ecosystem engineer A. agrestis. A. agrestis invasion typically co-occurs with the ecosystem engineer, Odocoileus virginianus, where their impacts may synergize. To determine the direct effects of A. agrestis invasion, fenced plots across the Cuyahoga Valley National Park that excluded deer were utilized. The species richness, Shannon diversity and evenness of woody understory flora was measured in each plot. Mustard extraction was used to determine earthworm abundance. Correlations between abundance and measured variables were used to highlight potential invasion effects. Abundance and species richness was found to have a significant, positive correlation (p = 0.042, r = 0.67). Abundance and diversity, and abundance and evenness, were not significantly correlated (p = 0.16, r = 0.5, and p = 0.22, r = -0.48 respectively). Invasion by A. agrestis may facilitate an increase in species richness in the woody understory, while potentially having no significant impact on diversity and species evenness. These results contradict previous studies. However, these results match a previous study in the CVNP that also utilized fenced plots. This suggests that the direct effects of A. agrestis on woody understory flora may be different than those observed in the presence of White-tailed Deer.
Dr. Randall Mitchell
Dr. Christine Sprunger
Honors Faculty Advisor
Brian P. Bagatto
MAMMANA, CHRISTIAN, "Potential Effects of Amynthas Agrestis Invasion on Woody Understory Flora in the CVNP" (2022). Williams Honors College, Honors Research Projects. 1465.