In this study, students investigate whether and how much the native understory shrub pawpaw (Asimina triloba) may affect tree regeneration in a forested habitat. During one lab period in the field, they collect data on the densities of tree seedlings and saplings under varying densities of pawpaws. During a second lab period in a classroom, they test whether tree densities are lower under...

Publisher: EcoEd Digital Library

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As invasive plant species spread across landscapes, costs of their economic and environmental impacts have sparked interest in regulating their sale and transport. Laws now prohibit the sale and movement of some species. State and local governments are drafting regulations that will affect horticulture, plant nurseries, and options for landscape design. Awareness of invasive plant species is...

Publisher: EcoEd Digital Library

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Grasping the mathematics underlying the species-area relationship in island biogeography can be difficult for students if they experience it passively. This exercise allows students to take an authentic data set of bird species richness from different islands in the Solomon Islands Archipelago and fit a species-area relationship (S=cAz). Students explore a biological concept in a hands-on...

Publisher: EcoEd Digital Library

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In this activity, students will play the role of a field biologist quantifying and explaining animal behavior using the scientific method (observation – hypothesis – prediction – test). Powerpoint slides contain a series of photos of scavengers at deer carcasses. Students will form hypotheses about the behavioral interactions in the photos, then make predictions that could be used to test their...

Publisher: EcoEd Digital Library

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Species diversity generally increases in the tropics but testing theories that explain this phenomenon is challenging. Here we use body size to quantify niches in ecological communities and explore how species diversify towards the equator.

Publisher: EcoEd Digital Library

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