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Coral Reefs - Abiotic Factors

Jaimee Stegall

Anna Clawson

Bree Johnson

Cynthia Ruiz

Hurricanes

Coral Cover

Coral reefs in the Caribbean are majorly damaged by hurricanes every year. There are two different types of coral in the caribbean; Staghorn and Boulder star. The hurricanes affected the staghorn more severely than the boulder star coral because the boulder star is like a rock unlike the staghorn which has branches of coral floating free in the ocean. The hurricanes also affected multiple different plants and the temperature of the ecosystem. Hurricanes are an abiotic factor because it is non-living. The storms or hurricanes are not limiting factors. The hurricanes in the caribbean greatly affected the coral over the time span of ten years when i set the storm severity to 50%. About 90% of all staghorn coral had vanished among the coral reef.

  • a factor that affected the ecosystem is the coral, the coral is a home to some, and a lunch for others.
  • Coral effected the ecosystem by the fish numbers and the water clarity.
  • Coral effected the algae and the Queen Angelfish. The algae amount went up as the queen angelfish went down.
  • Coral is biotic
  • Yes, it is density-dependent.

First image: Boulder star coral

Second image: Staghorn coral

Temperature

Sewage

  • Temperature is the amount of warmth or coolness in the water. temperature can affect the species that live there, plant that grow there, and other things in the ocean.
  • Temperature can affect all aspects of the ocean. Two things that temperature can affect are coral reef growth and amount of fish.
  • Temperature is abiotic. It is a limiting factor. It is also density independent. No matter how many animals are in the water, the temperature is part of the climate. Climate affects everything, no matter how many organisms are in that area.
  • Relative Example: no matter how many people are outside, it is still going to rain. The number of people that are outside does not affect if it is going to rain or not.
  • Temperature affected the coral by coral bleaching. Coral bleaching is where the temperature in the water rises, causing coral to loose it's color. Coral usually dies after this. Another affect temperature can have on the ocean is changing the balance of certain chemicals. pH can rise and fall depending on the coolness of the water.

Pictures/ Graph

  • Sewage is a mixture of toxic chemicals.
  • The chemicals unbalance the pH of the water, which then causes problems for the ecosystem.
  • Sewage is abiotic. Also an unlimited factor, due to the fact that we can not control the amount of waste and other substances we produce.
  • The substances effect the species in coral reefs, the organisms require a substantial amount of nutrients, toxins being dumped into coral reefs causes the quality of water to deteriorate.
  • The bacteria in the mixture feeds decomposing organic material which then limits the amount of oxygen availble to the organisms

Hypothesis

If wolves eat grass, fish, and bugs surrounding or in the river, then bunnies, birds and other animal populations will decrease.

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