Biology Chapter 2.1 Organisms and Their Environment.

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Presentation transcript:

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.SeaWiFSNASAGoddard Space Flight CenterORBIMAGE

2.1 Organisms and Their Environment  Biotic Factors = Living  Abiotic Factors = Nonliving earthguide.ucsd.edu/.../acct/lzace/jellyfish.gif

2.1 Organisms and Their Environment  Levels of Organization Individual Population Biological community Ecosystem

2.1 Organisms and Their Environment  Habitat – where an organism lives Can be changed by natural causes or humans

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

2.1 Organisms and Their Environment  Survival Relationships Predator / Prey Relationship

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