Abiotic and Biotic

Only available on StudyMode
  • Topic: Stream, Water, Biotic component
  • Pages : 8 (2361 words )
  • Download(s) : 441
  • Published : October 10, 2012
Open Document
Text Preview

Cabbage tree creek and its catchment runs from the foothills of Ferny Hills to Sandgate and terminates at Shorncliffe before emptying into Moreton Bay. Cabbage tree creek is known for its intact riparian and the high percentage native vegetation that lines the creek. . Cabbage tree creek is well looked after by its community, and is considered to be very healthy, with a high rating for Abiotic and biotic indicators; although it has its a few low quality zones e.g. the waterway under the Park Collins road.


Abiotic is a scientific term for non living factors that effect the environment. Abiotic and biotic factors combine together to create an eco system. An ecosystem is a community of living and non living things combined together carefully. Abiotic factors include sunlight, temperature, water, turbidity, salinity, pH, nitrides D.O. These factors have a major effect on the biotic factor in the eco system.


Turbidity is the measurement of the clearness of the water. The major determination that can affect the turbidity of the waterways is human manufacturing and consumption. The level of turbidity will affect the biotic factors in the waterway, this can affect the different species and the of macros and micros that are present. Macro and micros have a certain specific sensibility to the clarity of the water, the clearer the water the more highly sensitive macros and micros present. Photosynthesis is affected by the level of turbidity. The turbidity stops the light penetrating the necessary light that is needed for photosynthesis in the plant, which is also, connected the amount of oxygen that is available in the water. The amount of oxygen that is present in the water also is connected to the different species that can live in that waterway. The Overall high turbidity levels can lead to affecting all the orgasming that are present in the waterway.

Dissolved Oxygen

The amount of dissolved oxygen (D.O) is referred to the levels of oxygen that is present in the waterway. Aquatic organisms depend on the amount of dissolved oxygen that is present; the living conditions of aquatic organisms are also affected. The amount of D.O in the water reflects the amount of oxygen that produced by the plants in the water through photosynthesis. The D.O rates are increased and decreased by the turbidity of the water, this links to the plants creating photosynthesis by the amount of light that is visible on the bottom of the creek. The oxygen is affected by the temperature of water and the salinity. D.O is produced by plants that are present in the water, light intensity and water temperature. If the D.O in the water drops the waterway is more likely to contain more toxics and death of living organisms. As the temperature increases the D.O decreases, this will then affect the fish, macros and micros because there will not be enough oxygen present in the water, which can suffocate the organisms and kill them.

Water Temperature

Water temperature is a measure of the degree of hotness or coldness of water. Water temperature helps the ecosystem functioning both directly through the effects on the organisms. Photosynthesis and the growth, reproduction of organisms are all affected by changes in water temperature. Aquatic organisms can only survive in a specific temperature range. If temperature goes too far above or below the tolerance range for a species, it increases its the chances of the organism being killed.


Salinity is the mass of salts in water. Salinity affects the organisms that live within the water. The organisms have a tolerant range of salinity. Salinity is an indictor of the nature of the eco system. The salinity of the water tells how much fresh water as been mixed with sea water.


pH is a measure of acidic or base of the water on a scale from 0 through 7 to 14. If the pH of the waters is close to 7, it is the most neutral water. The weather...
tracking img