INTERACTIONS AMONG ORGANISMSADAPTATIONS Biosphere the parts of Earth

INTERACTIONS AMONG ORGANISMS/ADAPTATIONS

� Biosphere: the parts of Earth and the surrounds atmosphere where there is life. � Community: all the populations of different species that live together in the same area at the same time. � Population: all the organisms of the same species living together in the same place at the same time.

� Competition: the demand for resources, such as food, water, and shelter, in short supply in a community. � Limiting factor: anything that restricts the size of the population. � Population Density: the size of a population compared to the amount of space available.

� Biotic Potential: the potential for growth of a population if it could grow in perfect conditions with no limiting factors. � Carrying Capacity: the largest number of individuals of one species that an environment can support.

INTERACTIONS AMONG ORGANISMS � Limiting factors � Resource in an environment is scarce…limits the amount of organisms in an eco system � Carrying capacity = total amount an ecosystem can support

INTERACTIONS AMONG ORGANISMS � 1. Competition = struggle with one another or the environment to survive � 2. Predator/Prey = predator eats prey � Ex. � 3. Bird eats worm Symbiosis = close relationship � Mutualism = both organisms benefit � Commensalism = one organisms benefits, the other is unaffected � Parasitism = one benefits, one is harmed � Ex. Parasite vs host

YOU TUBE—INTERACTIONS VIDEO � http: //www. youtube. com/watch? v=D 1 a. RSe. T- m. QE � http: //www. youtube. com/watch? v=z. Sm. L 2 F 1 t 81 Q � http: //www. youtube. com/watch? v=f 1 Y 88 Fb 9 l 0 o

MR. LEE � http: //www. youtube. com/watch? v=x. Nm 7 dg 3 Biy. U

OTHER VOCABULARY � Habitat = environment in which an organism lives � Niche = organisms way of life with in an ecosystem