Abstract

The introduction of a new species into an ecosystem can have dire consequences for the native inhabitants of that area. Introductions can have a wide range of effects on a community including increased competition for space and resources and new or increased hybridization. I analyzed hybridization between native species Echinacea angustifolia and introduced species E. pallida at the Hegg Wildlife Management Area in Minnesota. Specifically, I analyzed whether hybridization whether flowering time was a predictor for hybridization and whether maternal plants of both species produced the same number of hybrid offspring. My analysis of symmetry showed no significant results, although there was a visible trend toward higher hybridization in E. pallida. My analysis of lowering time showed a significant relationship between flowering time and hybridization in E. angustifolia revealed no significant results. However, there was a significant relationship between hybridization and flowering time in E. pallida. This relationship informs the trends seen in asymmetry. Further work genotyping pure E. pallida plants would aid in providing an easier, more accurate method of identifying hybrids and understanding the exact dynamics of hybridization at this site. Studying hybridization in this system is particularly relevant to understanding not only how hybridization may be affecting or threatening small, fragmented plant populations, but also may enhance understanding of secondary contact between recently diverged species and the genetic consequences that may follow. All of this knowledge will aid in predicting and understanding population dynamics as the ranges of species continue to shift in the coming years.

Advisor

Ison, Jennifer

Department

Biology

Disciplines

Botany | Plant Biology | Plant Breeding and Genetics

Publication Date

2016

Degree Granted

Bachelor of Arts

Document Type

Senior Independent Study Thesis

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© Copyright 2016 Kathleen Hogg