Publication: HERBACEOUS PLANT COMPOSITION IN THE HUSSON UNIVERSITY FOREST PRIOR TO INVASION BY EMERALD ASH BORER
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Date
2026-04-16
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Type
Poster
Abstract
The Emerald Ash Borer (Agrilus planipennis, EAB) is an invasive species quickly killing ash trees across the eastern United States. With the EAB soon to arrive on our campus forest, we proposed a study to establish baseline pre-invasion data on woody, herbaceous, avian, and small mammal populations. Husson’s ash forest contains both upland deciduous forest and wetlands. We established six sites in the forest, each with multiple ash trees present: three in the upland and three in the wetland. Following the collection of pre-invasion herbaceous data in July 2025, we analyzed the diversity, composition, and canopy openness between site types. We found a significant difference in composition between the upland and wetland sites, but no difference in diversity or canopy openness. The lack of difference in diversity between upland and wetland plots may be due to an overall low number of species throughout the forest, while the lack of difference in canopy openness suggests that the cause of the compositional difference between the upland and wetland is not related to varying levels of light reaching the forest floor. Indicator species analysis revealed five species that represented the upland (p=0.01, 0.03, 0.03, 0.04, 0.04) and two species that represented the wetland (p=0.01, 0.001). We recommend monitoring the water table and measuring nutrient availability as a possible means to explain the compositional difference between the wetland and upland environments. Collecting data earlier in the season may reveal the presence of transient wetland species. Research post-invasion should focus on the species identified as indicators of their respective environments.