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Biology Chapter 2.1
Organisms and Their Environment
2.1 Organisms and Their Environment
Ecology- study of organisms and their environment Biosphere – high in atmosphere to
bottom of ocean
Provided by the SeaWiFS Project, NASA/Goddard Space Flight Center and ORBIMAGE.
2.1 Organisms and Their Environment
Biotic Factors = Living
Abiotic Factors = Nonliving
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earthguide.ucsd.edu/.../acct/lzace/jellyfish.gif
2.1 Organisms and Their Environment
Levels of Organization Individual Population Biological
community Ecosystem
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2.1 Organisms and Their Environment
Habitat – where an organism lives Can be changed by natural causes or
humans
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2.1 Organisms and Their Environment
Niche- a position a species has in its environment No two sp. Can exist in the same niche
in the same place at the same time One will gain control over resources The other must adapt, move elsewhere, or
go extinct.
y2u.co.uk/.../I_zq5/RN_Animal_Giraffe_1.jpg
2.1 Organisms and Their Environment
www.unu.edu
2.1 Organisms and Their Environment
Survival Relationships Predator / Prey Relationship
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2.1 Organisms and Their Environment
Survival Relationships Symbiotic Relationships
Commensalism Remora/Shark Barnacles on whales
Mutualism Bacteria in lg intestines The Nile crocodile and the Egyptian plover N-Fixing Bacteria and plants
Parasitism Tapeworms Fleas, Lice Mistletoe
www.scubaduba.com/gallery/shark2.jpgwww.warrenphotographic.co.uk/.../cats/00955.jpg
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