| 1 | <p>In this exercise, students investigate differences in seed dispersal between two tropical tree species, one wind-dispersed and one bird-dispersed. Student make predictions about the seed shadow of the two species and then compare their predictions to seed dispersal patterns revealed in graphs. Students also explore the relationship between seed survival as a function of distance from the maternal tree. Students apply what they learn to the design of a conservation area. In an optional activity, students examine the degree to which results from the study support the Janzen-Connell hypothesis.</p> | 1 | <p>Understanding differing dispersal mechanisms (wind & animal) and their impact on seed shadows and conservation actions is an essential first step in conservation. Comparing two types of tropical tree species, a wind-dispersed species and a bird-dispersed species, students consider factors that may limit dispersal for each type of tree. Students explore concepts such as seed shadows, the relationship between seed survival as a function of distance from the maternal tree and the Janzen-Connell hypothesis. Students learn to graph data and discuss the impacts of fragmentation on dispersal.</p> |
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