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Groups of organism that settle on man-made structures

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Presentation on theme: "Groups of organism that settle on man-made structures"— Presentation transcript:

1 Groups of organism that settle on man-made structures

2

3 How are they formed?

4 INTERTIDAL Sometimes under water SUBTIDAL Always under water

5 STRESSORS under the dock
Always submerged Low salinity No waves High pollution

6 STRESSORS on the piling.
INTERTIDAL: EXPOSURE TO AIR Exposure to predators Desiccation: drying out, getting oxygen, heat

7 How to Attach? CEMENT FOOT & GLUE BYSSAL THREADS: beard

8 Why must there be lots of algae/plant life?

9 How do organisms feed at the docks?
Suspension feeders: eating particles

10 How do organisms feed at the docks?
Filter feeders: eating particles

11 INTERTIDAL Sometimes under water SUBTIDAL Always under water

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