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Impacts of Introduced Species: Interspecific Competition, Predation, and Other Species Interactions
Due to increasing global connectivity, global biotic interchange has been escalating, leading to species introductions in regions in which they are not indigenous. Most of these species do not establish and/or do not cause significant impacts, but a small proportion do and can have positive or, more often, negative ecological, economic, and cultural impacts. These species often interact with...
Publisher: EcoEd Digital Library
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A 4DEE Introduction to wetlands: Basic principles, online mapping, and field identification
This lesson focuses on basic principles and identification of wetlands, which are valuable and productive ecosystems in the landscape. It consists of two files that complement each other. This first is a Powerpoint presentation that provides basic principles about wetlands. The second is a set instructions for a laboratory in which students learn how to locate wetlands using online mapping,...
Publisher: EcoEd Digital Library
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Case Study on Mark and Recapture
Estimating the population size of animals is an important task for wildlife biologists, who can use the data to assess the health of a population. It requires diligent observation skills coupled with the ability to use empirical models that effectively determine the number of animals based on field surveys. The most common method for estimating the population size of animals is mark and recapture....
Publisher: EcoEd Digital Library
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Finding a species-area relationship for island birds using Solver in Excel
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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Testing hypotheses about behavioral interactions between cats, coyotes, and birds at carcasses
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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