Biological Communities

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Biological Communities

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Presentation transcript:

Biological Communities Chapter 17 Pre AP Biology Spring ‘13

Relationships within an ecosystem No one organism can survive by itself. Organisms depend on each other.

Predator-Prey Predation is a relationship between 2 organisms in which one is being consumed so that the other can gain energy. The predator does the eating, the prey gets eaten.

Symbiotic Relationships Symbiosis – when two or more species live together in a close, long-term association. Three major kinds of symbiosis: Parasitism Mutualism Commensalism

Parasitism One organism feeds on another. Usually lives on or in another larger organism which is called a “host” Parasites don’t kill their host.

Mutualism Mutualism is a relationship in which both species benefit.

Commensalism Commensalism is a relationship in which one species benefits and the other is neither harmed nor hurt.

Climate's Effect on Where Species Live Where organisms live is determined by the climate. Climate is the prevailing weather conditions in a given area largely determine where species live. 2 most important aspects of weather are: Temperature Moisture

Temperature and Moisture are related The warmer the air, the more moisture it will hold. Temperature also decreases as altitude increases. So the air is colder and drier in the mountains.

How Temperature and Moisture Effect Ecosystems

Biome Biome - A major biological community that occurs over a large area of land. There are 2 kinds: Aquatic biomes and Terrestrial biomes

Aquatic Communities Aquatic communities interact with the terrestrial biomes There are three kinds of Aquatic Communities: Freshwater Communities Wetlands Marine Communities

Fresh Water Communities

Marine Communities