Biology 2483A Chapter 13: 12 - Predation and Herbivory
15 Dec 2017
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Document Summary
Over half the species on earth get energy by feeding on other organisms, in a variety of types of interactions (ie. counter-defences). All are exploitation relationship where one organism benefits by feeding on, and directly harming, another (plus/minus interaction). Herbivore eats tissues of living plants or algae. Predator kills and eats other organisms, referred to as prey. Parasite lives in or on another organism (its host), feeding on parts of it. Not all organisms fit neatly into these categories: some predators, such as wolves, also eat berries, nuts, and leaves. Parasitoids: insects that lay an egg on or in another insect host. After hatching, larvae remain in the host, which they eat and often kill: features of parasite & predator. Predators and herbivores both tend to feed on multiple individuals of prey or food plants in their. Predators and herbivores lifetimes: herbivores usually don"t kill.
