Zonation
* Introduction
The focus of our investigation is to discuss the distribution of CE ( Turbo Smaragda) and NN (Hormasira Banksii) on the rockyshore at Wenderholm considering biotic and abiotic factors that may explain their distribution.
Describe the distribution of TWO of these species in the kite graph that appear to show a biotic distribution.
The Cat’s Eye are found 14~18m from the HWM AND 22~32m from HWM so they are found in mid and low tide zone and absent from HTZ, therefore they are predominantly found within the zone where NN is found. The NN are found 26~36 from the HWM. So they are predominantly found in low tide region and not above at 0~24m. Name an abiotic factor (non living-environmental), linked to this pattern. Explain how and why this abiotic factor changes down the rocky shore.
There is a pattern of zonation from the HWM to LWM. The abiotic factor that can be linked to this pattern of zonation is exposure to air. (How) The movement of the tide in and out over the intertidal area twice a day exposes organisms to the air for varying length of time, which cause organisms to desiccating. (Why) Organisms inhabiting the high tide zone will be exposed to air for very long periods of time and will need a greater tolerance to desiccation than organisms lower down the intertidal area where they will be exposed to air for shorter periods of time and will not need such a great tolerance to desiccation.
So NN and CE will be exposed for same periods of time as they occupy the low-mid tide zone. Explain the effect this abiotic factor has on your two selected organisms, and the adaptations these species have that allow them to live in the areas shown in the pattern. The adaptations must be linked to the abiotic factor mentioned above.
Exposure to air has a desiccating effect on CE and NN. They both possess adaptations to reduce this effect when exposed to air when the tide is out.
* Adaptation for CE/OB
The focus of our investigation is to discuss the distribution of CE ( Turbo Smaragda) and NN (Hormasira Banksii) on the rockyshore at Wenderholm considering biotic and abiotic factors that may explain their distribution.
Describe the distribution of TWO of these species in the kite graph that appear to show a biotic distribution.
The Cat’s Eye are found 14~18m from the HWM AND 22~32m from HWM so they are found in mid and low tide zone and absent from HTZ, therefore they are predominantly found within the zone where NN is found. The NN are found 26~36 from the HWM. So they are predominantly found in low tide region and not above at 0~24m. Name an abiotic factor (non living-environmental), linked to this pattern. Explain how and why this abiotic factor changes down the rocky shore.
There is a pattern of zonation from the HWM to LWM. The abiotic factor that can be linked to this pattern of zonation is exposure to air. (How) The movement of the tide in and out over the intertidal area twice a day exposes organisms to the air for varying length of time, which cause organisms to desiccating. (Why) Organisms inhabiting the high tide zone will be exposed to air for very long periods of time and will need a greater tolerance to desiccation than organisms lower down the intertidal area where they will be exposed to air for shorter periods of time and will not need such a great tolerance to desiccation.
So NN and CE will be exposed for same periods of time as they occupy the low-mid tide zone. Explain the effect this abiotic factor has on your two selected organisms, and the adaptations these species have that allow them to live in the areas shown in the pattern. The adaptations must be linked to the abiotic factor mentioned above.
Exposure to air has a desiccating effect on CE and NN. They both possess adaptations to reduce this effect when exposed to air when the tide is out.
* Adaptation for CE/OB