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Name ______________________________________________________ Biotic Factors in the Intertidal Zone Guided Notes -‐The 4 Needs of all living organisms are: _________________________________________________________________________ _________________________________________________________________________________________________________________________ -‐Each species in the intertidal zone has _________________________________________________________________________ _________________________________________________________________________________________________________________________ -‐Different _______________________________________________________________________________ affect an organism’s ability to obtain the 4 Needs of living things -‐Generally speaking -‐Abiotic factors set ___________________________________________________________________________________________ -‐Biotic factors set ____________________________________________________________________________________________ Abiotic Factors Biotic Factors Competition for Space -‐________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ -‐________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ -‐________________________________________________________________________________________________________________________ Example: Competition for Food -‐________________________________________________________________________________________________________________________ -‐________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ -‐________________________________________________________________________________________________________________________ Example: Predation -‐________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ -‐________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Example: Food Availability -‐________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ -‐________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ -‐________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Examples: Grazing -‐________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ -‐________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Examples: Questions to consider – answer the back of this sheet. 1. As you move from the Splash Zone down to the Sub Tidal Zone, which factors (abiotic and biotic) become more important in determining an organisms' range? 2. Paraphrase/summarize the main theory that behind what determines the dominant organisms in each zone. Use the following quote to help you: “The interplay of the two sets of problems of abiotic factors and biotic factors produces a series of horizontal bands along the coast each dominated by the particular species which best deals with the problems at that particular level.” – David Attenborough
