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- =Ecological Core Concepts -- Populations [X]
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A Bearded Vulture (Gypaetus barbatus), a threatened species.
The Bearded Vulture (Gypaetus barbatus) is a threatened species. Many conservation programs aim to increase population size by improving survival and reproduction; however, density dependence may confound this approach. A recent study evaluated the consequences of population growth on reproductive performance of Bearded Vultures in the Spanish Pyrenees, and its results suggest that the use of...
Publisher: EcoEd Digital Library
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Teaching Exponential and Logistic Growth in a Variety of Classroom and Laboratory Settings
Ecology and conservation biology contain numerous examples of
populations growing without bounds or shrinking towards extinction. For these
populations, the change in the number of individuals generally follows an
exponential curve. On the other hand, limited resources may keep population
numbers in check and help maintain the population at the environment's carrying
capacity. These...
Publisher: EcoEd Digital Library
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Painting turtles: an introduction to species distribution modeling in R
Cooperative learning: Students can work through the exercises in groups, using either the painted turtle data
or group-specific taxa (i.e., each group selects a taxon to model). This module addresses multiple, complex
concepts online data availability & access, spatial query & analysis, global climate models, theoretical
concepts of SDMs, model fitting any of which can be expanded depending...
Publisher: EcoEd Digital Library
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Effects of plant quality on caterpillar performance
Fertilizers are commonly applied to plants in both agricultural and ornamental settings and these fertilizers can affect insect herbivores. Beet armyworms, Spodoptera exigua, are phytophagous insects that are easy to rear in the lab. In this exercise, students design an experiment that manipulates plant quality via fertilizer application and then measure the effect of fertilization on caterpillar...
Publisher: EcoEd Digital Library
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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...
Publisher: EcoEd Digital Library
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