2. Regents Biology Ecology & Levels of Organization

3. Regents Biology with a whole lot of other creatures… We share the Earth…

4. Regents Biology We don’t share very well….

5. Regents Biology

6. Ecology  study of interactions between the living creatures (biotic factors) & the nonliving factors (abiotic), because… Everything is connected to everything else

7. Regents Biology Environment  The physical, chemical and biological factors that act upon living things. Surroundings…  The environment ultimately determines the survival of the organisms!!!

8. Regents Biology Levels of Organization of the Environment 1. Species Smallest 2. Population 3. Community 4. Ecosystem 5. Biome 6. Biosphere Largest

9. Regents Biology Levels of Organization

10. Regents Biology 1 st Level of Organization Species A group of organisms so similar that they can breed and produce fertile offspring. Ex.

11. Regents Biology A Species has a HOME Habitat: The area an organism live in. Possible habitats: river, coral reef, deciduous forest Ex. A lives in a

12. Regents Biology A Species has a JOB… Niche: An organisms role in the ecosystem…what it takes and gives back to that ecosystem. No two species can share the same niche or competition occurs and one will lose out!

13. Regents Biology 2 nd Level of Organization Populations Population - all the organisms of the SAME species that live in the same area

14. Regents Biology 3 rd Level of Organization Community - populations of different species that live in the same area Feeding relationships Community

15. Regents Biology 4 th Level of Organization Ecosystem All the organisms that live in a particular area AND their nonliving environment.

16. Regents Biology Living vs. Nonliving Factors  BIOTIC ABIOTIC The living parts of The physical (nonliving) the environment factors that affect the survival of each organism Ex: water, air, rock soil, light, temperature Ex. Plants, animals, bacteria

17. Regents Biology Biotic Factors ECOSYSTEM Abiotic Factors Abiotic and Biotic Factors

18. Regents Biology Limiting Factors An ecosystem only has so many resources…  Limiting Factors: Conditions that limit the growth of a population Ex: The growth of a bunny population  Air  Water  Food  Shelter  Predators  Temperature  Nutrients  Space

19. Regents Biology Carrying Capacity The number of organisms an ecosystem can support

20. Regents Biology 5 th Level of Organization Biome Click meClick me a group of ecosystems that have the same climate and similar dominant communities.

21. Regents Biology 5 th Level of Organization Biome Biomes may be terrestrial (land) or marine(water) determined by their geography and climate

22. Regents Biology 6 th Level of Organization: Biosphere = Earth (Bio =living Sphere = Earth… Living Earth)

23. Regents Biology The part of Earth that contains all ecosystems Community and its nonliving surroundings Populations that live together in a defined area Group of organisms of one type that live in the same area