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View Resource 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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View Resource 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

View Resource 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

View Resource 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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View Resource 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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