Words to Know Ecosystem 10. population density 19. symbiosis Habitat 11. immigration 20. mutualism Biotic factor 12. emigration 21.commensalism Abiotic factor 13. limiting factor 22. parasitism Photosynthesis 14. natural selection 23. parasite Species 15. adaptation 24. host Population 16. niche 25. birth/deatrate Community 17. predator Ecology 18. prey

Interactions among living organisms

Adaptations The behaviors and physical characteristics of species that allow them to live successfully in their environment.

Niche An organisms particular role, or how it makes its living.

Competition The struggle between organisms to survive in a habitat with limited resources.

Predation An interaction in which one organism kills and eats another

predator The organism that is doing the killing

Predator Adaptations Adaptations that allow the predator to more easily catch and kill their prey. Ability to see at night Speed Poisonous stings

Prey The organism being killed

Prey Adaptations The development of defense mechanisms helping to protect the prey Warning colors Protective coverings camouflage

Symbiosis Close relationship between two species that benefits at one of the species…. Three types: mutualism, commensalism, parasitism

Mutualism Relationship in which both species benefit

Commensalism Relationship in which one species benefits and the other species is neither helped nor harmed

Parasitism Relationship in which one organism lives on or in another harming that organism

Illustration Quiz Each picture is given with its vocabulary word…..write one sentence why each picture is true.

Ecosystem

Biotic Factors

Mutualism

Commensalism

Natural Selection

Predator

Prey

Energy Flow in Ecosystem

How does this group of Organisms work together?

Energy Roles An organism’s energy role is determined by how it obtains energy and how it interacts with the other living things in its ecosystem. Roles maybe:

Energy Energy first enters most ecosystems as sunlight. Organisms, such as plants, algae and certain microorganisms store it as food energy. http://www.pbs.org/wgbh/nova/nature/photosynthesis.html

Producers

Research Consumers Table Group # 2 (middle tables) Define Explain its position in an ecosystem 6 examples of consumer What makes them important How do they work 6 other details you can find

Research Decomposers Table group # 3 (by the window) Define Explain its position in an ecosystem 6 examples of decomposer What makes them important How do they work 6 other details you can find