1
True or false?
Sandy shores have lower biodiversity than rocky shores
True
How deep are the burrows that the crabs dig?
1 meter
Is sand and temperature a biotic or abiotic factor?
abiotic
What happens to a lugworms tail when it cut off?
It regrows
Water often sits on top or drains very slowly, which can lead to ______.
anoxic
Fewer food sources lead to an increase in what?
How do Mole Crabs (Emerita) use their specialized legs?
To burrow backward into the sand incredibly fast as waves retreat.
Is predation a biotic or abiotic factor?
biotic
Why would a lugworm sacrifice a piece of themselves to a predator?
So they can survive
Small particles pack closely together with tiny spaces, leading low _________.
permeability
What shaped burrows do lugworms live in?
U-shaped
What are lugworms
detritivores
What kind of design is the razor clams shell shape is a "low-drag" design
low-drag design
Razor clams can bury themselves in seconds to avoid being swept away by what?
A breaking wave
Ghost crabs dig 1m deep burrows high on the shore above the tide mark to avoid the _____ during the day.
heat
What is Burrowing?
When most animals live inside the sand to avoid dehydration and waves.
Large particles have large interstitial spaces resulting in what?
high permeability and rapid drainage.
What does a ghost crab camouflage in?
sand
Razor clams make their unique shell shape by using what?
fluidization
A sandy shore is a _______ environment characterized by an unstable, shifting substrate.
dynamic
What does permeability refer to?
Permeability refers to the rate at which water flows through a substrate
What do lugworms filter organic matter from.
sand
How do razor clams dig burrows?
By forcing the muscular foot out of the shells to create a hole.
Since lugworms live in deep burrows where water doesn't circulate well, they have ______ with a very high affinity for oxygen to survive in low-oxygen sand.
hemoglobin
Donax clams (coquina clams) "surf" the waves, moving up and down the beach with the tide to stay in the moist ______ zone.
swash