Written in 2008; 1,355 words; 5 sources; APA; $ 45.95
Paper Summary:
This paper discusses an aquatic ecosystem located in a botanical garden in which dragonfly larva eat stickleback fish, which eat daphnia. The author describes the dragonfly larva, the stickleback fish and the daphnia and points out that the actions of these three entities in this aquatic ecosystem transfer nutrients into energy as they move through the food chain. The author concludes that the presence of predators has an effect on the morphology of each of the species and any changes in their behavior affects the environment as a whole.
From the Paper:
"A study by Arnqvist and Johansson (1998) considers ways in which the dragonfly larva may show the effects of adaptive phenotypic plasticity, meaning that the form of the insect based on environmental considerations, one of which is the action of predator-induced defenses in prey. Predation is known to affect the phenotypic expression of a wide range of traits in a way that reduces the impact of predation. Most studies have examined traits that exhibit switched plasticity and usually do not examine the ontogenetic growth trajectories of defense structures."
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