1 / 9

Community Interactions

Community Interactions. Community Interactions. Community : Many different species interacting in the same environment. Three types of interactions: Competition Predation Symbiosis. Competition. Defined : competing for resources water, nutrients, light, food

shakti
Télécharger la présentation

Community Interactions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Community Interactions

  2. Community Interactions • Community: Many different species interacting in the same environment. • Three types of interactions: • Competition • Predation • Symbiosis

  3. Competition • Defined: competing for resources • water, nutrients, light, food • occurs due to a limited number of resources • Intraspecific competition: When organisms of the same species compete for resources. • Interspecific competition: When organisms of differing species compete for resources. • Competitive exclusion principle: no two species can occupy the same niche in the same habitat at the same time

  4. Predation • Defined: when an organism captures and feeds on another organism. • Predator- hunter • Prey- hunted

  5. Symbiosis • Defined:any relationship where two species live closely together. • Three types • Mutualism • Commensalism • Parasitism

  6. Mutualism Fungus obtains nutrients from the algae Fish receives protection and a home • Defined: both species benefit from a relationship. • Ex: Lichens (fungus and Algae) • Ex: Clown fish and anemones • Ex: Cleaner birds and crocodiles Algae lives amongst the fungal cells Anemone feeds on undigested food from the fish Bird receives food Crocodile has parasites removed

  7. Commensalism • Defined: One member of a symbiotic relationship benefits and the other is neither helped nor harmed • Ex: Cattle and Birds • Birds eat insects stirred up by the cattle • Ex: Barnacles and whales • Barnacles grow on whale

  8. Parasitism • Defined: One creature benefits and one creature is harmed • Endoparasitism: A parasite that inhabits the inside an organism. • Ex: Tapeworm feeds within a human’s intestines absorbing his/her nutrients • Ectoparasitism: A parasite that inhabits the outside of an organism. • Ex: A leech feeds on the blood of an organism from a host’s skin.

  9. Review • What is a community? • Name the 3 types if community interactions. • When do organisms usually compete? • How do predators and prey interact? • Name the 3 types of symbiosis. • How is predation and parasitism differ? • How does mutualism, commensalism, and parasitism differ?

More Related