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Write in your journal the DEFINITIONS:

Write in your journal the DEFINITIONS:. PREDATION PARASITISM COMMENSALISM MUTUALISM COMPETITION. Biological Communities. Coevolution. Back-and-Forth evolutionary adjustments between interacting members of a community. Ex: a moth pollinating an orchid flower Click for video

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Write in your journal the DEFINITIONS:

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  1. Write in your journal the DEFINITIONS: PREDATION PARASITISM COMMENSALISM MUTUALISM COMPETITION

  2. Biological Communities

  3. Coevolution • Back-and-Forth evolutionary adjustments between interacting members of a community. • Ex: a moth pollinating an orchid flower • Click for video • http://www.dnatube.com/video/1882/Darwins-Comet-Orchid

  4. Predation • One organism killing another for food • ex: A grizzly bear eating a salmon fish

  5. Parasitism • A parasite does not kill it’s prey. They depend on their prey (host) for food and a place to live. The parasite feeds on the host. • Ex: Mosquitoes suck human and animal blood.

  6. Secondary Compounds • To discourage herbivores, plants contain chemicals that may be toxic to insects or animals. • Ex: tobacco has a natural insecticide (kills the insect) known as nicotine.

  7. Symbiosis • This is when 2 or more species live together long term. These relationships can benefit both species or just one.

  8. Mutualism • This is a type of symbiotic relationship. Both species benefit in this situation. • Ex: ants suck an altered fluid containing sucrose (sugar) from aphids while they feed. The ants in turn protect the aphids from predators.

  9. Commensalism • This is a symbiotic relationship where one species benefits, but the other species is not harmed. • Ex: clown fish (Nemo) and the sea anemone

  10. Competition • When two species use the same resource. A resource could be the habitat or food source.

  11. Niche • This is how the organism lives. What “job” they perform in the ecosystem. • What do they eat? • Where do they live?

  12. Fundamental Niche • The entire range of resource opportunities for an organism. The variables that decide this are temperature, what the organism eats, and what time of year it mates.

  13. Realized Niche • This is part of the fundamental niche that an organism actually inhabits. • Ex: Cape May Warbler only feeds on insects at the top of the tree.

  14. Competitive Exclusion • When two species are competing for the same resources. The species that uses the resource more efficiently will eventually eliminate the other species.

  15. Biodiversity • This is a measure of both the number of different species in a community and the relative numbers of each species.

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