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Intertidal Zone

Intertidal Zone. What is the intertidal zone?. Area between highest high tide (spring) and lowest low tide (neap). 2 Types of Intertidal Zones. Based on substrate : Rocky Intertidal Western Coast of US, Eastern Canada and New England Sandy Intertidal Eastern and Gulf Coasts of US.

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Intertidal Zone

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  1. Intertidal Zone

  2. What is the intertidal zone? • Area between highest high tide (spring) and lowest low tide (neap)

  3. 2 Types of Intertidal Zones • Based on substrate: • Rocky Intertidal • Western Coast of US, Eastern Canada and New England • Sandy Intertidal • Eastern and Gulf Coasts of US

  4. Abiotic Factors • Exposure to air • Threat of high temp. • Higher organisms live in intertidal, more time exposed • Desiccation – drying out • Clam up • Run and hide

  5. Wave shock • Bigger problem along rocky shores • Hits headland the hardest

  6. Wave Refraction

  7. Other Challenges • Feeding Restrictions • Filter feeders cannot eat when tide is out • Predators • More difficult to hide when tide is out • Salinity fluctuations • Decreases with rain • Increases with evaporation

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