1 / 15

Ecosystem Interactions

Ecosystem Interactions . Lesson 7 September 1 st , 2010 . Biotic Interactions. Organisms in a community interact with one another in many ways. Three main ways are through symbiosis, predation, and competition. Symbiotic Relationships (3 types).

braima
Download Presentation

Ecosystem 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. Ecosystem Interactions Lesson 7 September 1st, 2010

  2. Biotic Interactions • Organisms in a community interact with one another in many ways. Three main ways are through symbiosis, predation, and competition.

  3. Symbiotic Relationships (3 types) • Symbiosis is a close interaction between two different species in which members of one species live in, on, or near members of another species. 1. Commensalism • + / 0 relationship • One partner benefits without significantly affecting the other • Example – Clown fish and anemone

  4. Symbiotic Relationships (3 types)

  5. Symbiotic Relationships (3 types) 2. Mutualism • + / + relationship • Both organisms benefit • Example – Bees and flowers, crocodiles and dikkop birds

  6. Symbiotic Relationships (3 types)

  7. Symbiotic Relationships (3 types) 3. Parasitism • +/ - relationship • One organism, the parasite, harms the host • Example – Lamprey, tick

  8. Symbiotic Relationships (3 types)

  9. Predator – Prey Relationships • When one organism consumes a second organism • Example – Lions and Zebras • Some species use mimicry to avoidpredators • one species looks like another species.

  10. Predator – Prey Relationships

  11. Competitive Relationships (2 types) • Where organisms compete for an important resource such as food, shelter or possibly mates. • May have negative effects on one another. • Actual fighting or exploitative competition 1. Intraspecific • Between members of the same species • Individuals may compete over food, water, light, space, safe sites, or mates. • Important factor limiting the population size of many species.

  12. Competitive Relationships (2 types)1. Intraspecific

  13. Competitive Relationships (2 types)2. Interspecific 2. Interspecific • Between 2 or more species • As the population of one species increases, it may limit the density of the competing species

  14. Competitive Relationships (2 types)2. Interspecific

  15. page 74 – 76 # 3,4, 6 a-c

More Related