Coral reefs and kelp forests are important subtidal ecosystems. Generally, you will not find kelp ecosystems in areas where corals thrive and vice versa. What is the primary reason why (choose the best answer)?
1) Kelp cannot grow in warm water.
2) Kelp forest need deeper water to survive.
3) Areas where kelp ecosystems grow tend to have higher dissolved nutrient.
4) Coralline red algae does not grow well in areas in temperate locations.
5) Coral reefs need higher salinity than kelps.