BISC 313 Lecture Notes - Lecture 8: Striking Distance, Coevolution, Body Armor
1 Nov 2017
School
Department
Course
Professor
Document Summary
Over half the species on earth get energy from feeding on other organisms in a variety of interactions. All are exploitative--the involve a relationship in which one organism benefits by feeding on, and directly harming, another. (+/- interaction) Herbivore: eats tissues of living plants or algae (consumer) Usually do(cid:374) t kill food orga(cid:374)is(cid:373)s as predators do. Can still reduce plant reproduction, survival, and growth. Predator: kills and eats other organisms referred to as prey (some eat prey alive) Parasite: lives in or on another (its host), feeding on parts of it. Parasitoids spend most o their life consuming a host, usually resulting in the host"s death. Insects that lay an egg in or on another insect host. Success in an exploitative interaction is defined by whether you are the predator/consumer or the prey/consumee. Adaptations for predation generally lower foraging costs and increase benefits. Predators are considered successful by consuming prey efficiently (cost vs.
