BIOL 2Q04 Lecture Notes - Lecture 16: Poison Dart Frog, Camouflage, Aposematism
18 Nov 2018
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Induced defenses: induced when attacked (i. e. chemical defenses). Finding the prey is easy but catching them uses lots of energy. Herbivory & mutualism: are all species interactions beneficial: predators of plants: herbivores, herbivores (grazers & browsers) consume live plant material but usually do not kill plants. Its relative: what is very apparent to us may not be apparent to an herbivore, 2. 13/11/2018: fast growing plants (like weeds) invest lots of energy into growth to escape pressure of herbivores. Rainforest trees in panama: best strategy, low growth rate -> invest quite a bit into the defense mechanisms, high growth rate -> invest little into defense mechanisms. Induced defenses (produced in response to herbivory): coevolution, herbivores fight back! 13/11/2018: reduced vigor of the plant due to loss of foliage and subsequent loss of roots, reallocation of plant energy to replace leaves and shoots eaten by herbivores -> less energy for growth and reproduction.
