What is the relationship between water clarity and urchin survival?

Sea urchins do not live in clear waters because they provide less nutrients to survive.

Sea urchins are organisms characterized by:

Sea urchins are:

From the above, it can be inferred that the sea urchin cannot survive in clear water because it has a low amount of microorganisms, organic matter, and herbs for its food.

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Sea urchin cannot survive in clear water

Explanation:

The higher the water clarity, the lower/or negligible is the number of urchin found in that particular water body.  

It is so because sea urchins prefer to stay in water bodies with proximity to rock pools and mud. Most commonly they are found on coral reefs of kelp forest or sea grass bed. They prefer to stay in habitat which can provide them food such as algae, sea weed, sea grass etc.  

a. population growth is decreasing

-2

+4

-10

-3

-8

-3

so the population decreased by 24 because 3+3+8+10+2=26-2=24.

hoped i !

explanation: