a study of rocky shore...
TRANSCRIPT
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A Study of Rocky Shore Ecosystem
Group 5
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Region Near Sea water Rock pool Splash-
zone
Hermit crab 1 6 0
Bumpy Drill 1 1 0
Sea slater 0 2 0
Top shell 15 20 0
Sea anemone 17 0 0
Turban shell 14 0 0
Ribbed clusterwink 0 0 0
Periwinkles 0 1 0
Dark-fingered crab 5 0 0
Red coloured crab 0 3 0
Total no. of species 6 6 0
Total no. of individuals 53 33 0
Rock pool has highest no. of animal species •Possible reasons: •Big and heavy rock •Constant environment •Temperature and humidity
Splash-zone has lowest no. of animal 0 •Possible reasons: •No water •Have rubbish
•Common species in the 3 sites sites: Top shell
• Species only found near sea water:Sea anemone and dark-fingered crab
• Species only found in rock pool:red coloured crab and sea slater
• Species only found in splash zone/rock pool water: none
Relative density of top shell in quadrat 1: 28.3%
Relative density of top shell in quadrat 2: 60.6%
A comparison of animal data (by quadrat survey) from the 3 sites
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Near sea water
rock pool
water
Splash-zone
Air temperature 27.6 29.8 27.8
Relative humidity(%) 51% 41% 50%
Light intensity (lux) 35400 16650 22300
Wind speed (m/s) 0.5 2.9 0.4
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Sea waterrock pool
water
Dissolved oxygen mg/l 8.59 11.56
pH 6.91 7.7
Total Dissolved Solid ppm 3 3
Total Suspended Solid mg/l 35 36
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Quadrat1
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Quadrat 2
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Turban shell
Adaptation features• Operculum semi-globular
Herbivorous
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Bumpy DrillCarnivorous
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Dark-fingered crab
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Active Searching
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Stalked barnacles
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Limpet
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Thank you ☺