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ERIC Number: EJ829742
Record Type: Journal
Publication Date: 2009
Pages: 6
Abstractor: As Provided
Reference Count: 22
ISBN: N/A
ISSN: ISSN-1059-9053
A Novel Experimental Design for Examining Bryophyte Response to Increased Ultraviolet Radiation
Fuselier, Linda; True, Nicole
Journal of Natural Resources and Life Sciences Education, v38 p27-32 2009
Bryophytes were among the earliest colonizers of terrestrial environs, and despite their interesting life histories and population dynamics, they are rarely used in undergraduate introductory biology labs. In an inquiry-based laboratory exercise for introductory biology, students implement a controlled experiment to investigate effects of increased ultraviolet radiation (UVR) exposure on liverwort gemmae. The exercise integrates impacts of climate change on plant populations with experimental design and liverwort ecology. It uses a readily available and easily propagated thallose liverwort. Liverworts reproduce both sexually and asexually, but asexual reproduction is imperative for population persistence. In the laboratory exercise, students explore how the environment impacts colonization of asexual propagules using a novel design that underlines the importance of randomization and introduces basic statistical techniques. The experiment can be completed in two, 2-hour laboratory periods and concepts and techniques are transferrable to a variety of learning environments. After the first implementation of this laboratory exercise, the majority of students agreed that they learned more about bryophytes, experimental methods, and reporting statistics in lab reports. (Contains 2 figures and 3 tables.)
American Society of Agronomy. 677 South Segoe Road, Madison, WI 53711. Tel: 608-273-8080; Fax: 608-273-2021; Web site: http://www.jnrlse.org/
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A