Are males cheaper than females? Male and female costs of reproduction
In this TIEE experiment, students investigate the costs of reproduction. In dioecious plants, a female's investment in reproduction is typically much greater than a male's, because while both sexes encounter the basic cost to produce a flower, only females have to allocate energy to seeds, exceeding the energy requirements to produce pollen. This 1-2 week field project tests whether the effects of these unequal costs are reflected in characteristics of individuals of functionally dioecious and long-lived Jack-in-the-pulpit (Arisaema triphyllum) in the field. Students will read two introductory articles and take a pre-project online quiz, collect the data in the field, analyze it, collect and interpret literature sources and will write a short report.
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| Format | |
| Resource Group | TIEE |
| Resource Group Link | https://ecoed.esa.org/index.php?P=SearchResults&F46=TIEE |
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| Life science discipline (subject) | |
| Keywords | plant ecology, cost of reproduction, sex change, size class, forest herb, dioecy, sequential hermaphroditism, seed production |
| Key taxa | Jack-in-the-pulpit (Arisaema triphyllum) |
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| Pedagogical Use Category | |
| Pedagogical Use Description | This field activity could be used in two ways: (1) in a third-year ecology course for 12-16 undergraduate students using the instructions as outlined in the present document, where students cooperatively collect their data in groups of two, and (2) in third to fourth year, two-week summer field course setting as an individual student project. In the latter setting, the project approach could be more inquiry-based. |
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| Url | http://tiee.esa.org/vol/v7/experiments/stehlik/abstract.html |
| Full Name of Primary Author | Ivana Stehlik |
| Primary Author Controlled Name | |
| Primary Author Affiliation | Department of Biological Sciences, University of Toronto at Scarborough, 1265 Military Trail, Toronto, ON, Canada, M1C 1A4 |
| Primary Author email | ivana.stehlik@utoronto.ca |
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| Rights | 2011 - Ivana Stehlik and Christina Thomsen and the Ecological Society of America |
| License | |
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| Review type | |
| Drought and Water Ecosystem Services Collection | Off |
| Conservation Targets Under Global Change Collection | Off |
| Big Data Collection | Off |
| Editors Choice | No |
| Resource Status | |
| Date Of Record Submission | 2011-08-29 |
| I Agree to EcoEdDL's Copyright Policy & Terms of Use | Yes |
| Date Of Record Release | 2011-08-29 12:39:21 |
| Last Modified By Id |
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| Date Last Modified | 2018-07-26 15:10:58 |
| Release Flag | Published |
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