Habitat space is a limiting resource for coral-dwelling gobies. The species pictured, Gobiodon histrio, coexists with an ecologically similar species in the same genus, Gobiodon erythrospilus, by...
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An ant (Crematogaster opuntiae) visits an extrafloral nectary of a fishhook barrel cactus (Ferocactus wislizeni). In many mutualistic species interactions, a suite of species in one guild exchanges...
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An Argentine ant worker (Linepithema humile) tends mealybugs in exchange for honeydew (visible in its mandibles). The Argentine ant is a widespread and ecologically damaging invasive species native...
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In this close up view of bayberries you can clearly see a whitish waxy coating. Bayberries are boiled to melt this wax for use in bayberry scented candles. One of the berries has been nibbled by a...
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In this Experiment, students investigate the inhibitory effects of Eastern Hemlock trees on establishment of neighboring woody plants. Some years ago, one of the faculty in the Biology Department at...
In this Experiment, students design an experiment to examine intraspecific and interspecific competition using two species of parasitoid wasps (Nasonia vitripennis and Melittobia digitata). Students...
In this laboratory exercise, the following issues are examined: 1) why neither predators nor prey go extinct when there is a long period of nonrenewal of the prey population 2) the effects of...
Impala (Aepyceros melampus) graze on grass in the Hluhluwe-iMfolozi Park, South Africa. Grass is a major component of the diet of impala and several other species abundant in the park. A recent study...
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