• Zonation is a vertical banding of the organisms living on the rocky coastline.

• These distinct bands occur in part from many complex physical and biological factors that effect marine organisms.

Spray or Splash Zone

High Tide Zone

Middle Tide Zone

Low Tide Zone

Mostly shelled orgs

Many soft bodied orgs and algae

Biotic factors affecting organisms living in the intertidal zone:

• Competition for space and food• Predation• Reproduction• Substrate settlement preference• Osmoregulation (dessication)

Abiotic factors affecting organisms living in the intertidal zone:• Salinity• Temperature • Air and light exposure• Tidal flow• Waves and current action• Substrate• Wind direction and strength• Dissolved O2• Storms• Natural Disasters

Please see the power point entitled…

“Rocky Shorewith labelsPower Point”

From my school web page