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Tidal Effects
Environmental Factors

Along eastern and western Australian shores there are two high tides and two low tides every 24+ hours.

In southeastern Australia, the difference between high and low tide is up to 2 metres.

In southwestern Australia, this difference is less than 1 metre.

In northwestern Australia, there is a 7 metre tidal range at Broome.

In South Australia the tides are more problematic. The tides of the Indian Ocean and the Pacific Ocean sometimes cancel each other out, so that there is only one high tide and one low tide every 24 hours.

Occasionally, the water level remains stationary for days at a time in a "dodge tide". If this occurs in the searing summer months, all creatures and algae on the upper shore levels perish.

 

Environmental Factors
Latitude
Currents
Wind Effects
Wave Strength
Tidal Effects
Desiccation
Substrate
Turbidity
Salinity


Home Page
Taxonomy
Biogeography
Rocky Shores
Tidal Levels
Intertidal Zonation
Environmental Factors
Biological Factors
Feeding Relationships
Activities

Glossary
References

 

 

   

References

Bennett, I. (1987) W. J. Dakin's classic study: Australian Seashores. p. 3-12, Angus & Robertson, Sydney.

Davey, K. (1998) A Photographic Guide to Seashore Life of Australia. p.8, New Holland, Sydney.

 

photo of Keith DaveyLife on Australian Seashores
by Keith Davey (C) 2000

Learning Consultant - Media
The University of Newcastle

email at australian_seashores@hotmail.com

Scientific Consultant: Phil Colman
site created 01.01.98 : updated 01.04.2000