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ABSTRACT
In this paper, we demonstrate that rapid cycling Brassica rapa (Wisconsin Fast Plants) can be used in inquiry-based, student ecological fieldwork. We are the first to describe age-specific survival for field-grown Fast Plants and identify life history traits associated with individual survival. This experiment can be adapted by educators as a method to teach age-specific demography or ecology with Fast Plants. Four genotypes of Fast Plants (dwarf, elongated internode, standard, and rosette) were used. Fast Plants were grown in a "common garden" experiment. The site was surveyed every day to monitor emergence, and every 2 days to record mortality. Seven life-history traits were measured: days to emergence, emergence date, death date, life span, flowering date, juvenile days, and adult days. Most seedlings emerged 5 to 6 days after sowing and plants lived an average of 30 days. Flowering began about 17 days after seedling emergence. Life table analysis showed that Fast Plants have Type I age-specific survivorship. Analysis of variance showed that these four genotypes did not differ for any of the life-history traits measured. However, correlation analysis revealed that life span was negatively related to emergence date, and flowering date was positively related with emergence date. We suggest that ecologists extend the use of Fast Plants to include student field-work. Through inquiry based work, students can construct a personal understanding about the process, practice, and outcomes of science. Students will also gain understanding about the limits of numerical data, their analysis, and their interpretation.
Abbreviations: ESA, Ecological Society of America.
ALL NATURAL SCIENCE is based on observation of reality. Observation can lead to questions, hypotheses, predictions, and experiments. Fieldwork provides one of the few opportunities in life science education where students can individually observe and interact with nature. Fieldwork can serve as the basis for student experience with science. In this article, we consider any out of classroom inquiry-based activity, even if conducted on campus or school grounds, as field-work.
There is clear evidence that a variety of teaching methods and learning experiences help to motivate students. The "hands on" learning achieved through field labs can reach students who are "turned off by the classroom setting (Nundy, 2001). Fieldwork provides an opportunity for students to work cooperatively. When students work together...