Threats on the Coral Reefs By lily barber, xiomara dalley, pam vlachogianni

Ocean Acidification

Definition: Ocean acidification is the ongoing decrease in the alkaline level of the Earth's oceans, caused by the uptake of carbon dioxide (CO2) from the atmosphere.

How does ocean acidification affect the ecosystem?

Increasing ocean acidification has been shown to significantly reduce the ability of reef-building corals to produce their skeletons. This results in the decrease in reef reproduction. Therefore marine species are limited in habitats and the entire marine ecosystem is affected.

Global Warming

Definition: An increase in the earth's average atmospheric temperature that causes corresponding changes in the climate.

How does global warming affect the ecosystem?

A rise in temperature makes a stressful and unfitting environment to the marine species (zooxanthellae) resulting in them leaving the corals in an attempt to find a more suitable environment, this process is called coral bleaching. This affects the ecosystem as it destroys potential habitats.

Human Impacts

Pollution, Oil Spill, Overfishing

Affects of another Resort on Heron Island

- Increase of boat traffic causing decrease in marine life.

- Bring more tourism affecting silver gulls, mutton birds, turtles, casuarinas, etc. Causes sand erosion and damage to the island.

- More electricity and freshwater is needed, causing the need for diggers and generators to come over to build causing pollution affecting the environment.

- Lots of people on the island swimming and stepping on coral causing destruction of the coral which will decrease the amount of coral. This will then affect the marine life as there habitats will be lost.

- Runoff will cause lots of soil in the water

- People walking or doing any activities will affect the islands natural cycle

- Larger lose of zooxanthellae

Heron Island

Affect of the Resort on Feeding Behaviours and Reproduction of Coral Species

If another resort was to be developed on Heron Island it would negatively affect the feeding and reproduction behaviours of coral species. For example, an increase of human activity and boat traffic will cause destruction to coral. This will then affect the marine food chain as feeding relationships will be lost. Reproduction cycles are also impacted as some species are not fit to survive.

Created By
Lily Barber


Created with images by paulbr75 - "starfish sea life animal" • vjacob1 - "christmastree worms close-up coral" • MikeBird - "rubbish seaside beach" • andreas160578 - "herring fish port" • dennisflarsen - "oil slick uss arizona hawaii" • Ben_Kerckx - "waste garbage garbage bag" • werner22brigitte - "heron island australia horizon" • skeeze - "blue heron great beach" • Find-cat - "heron sea nature" • IvaCastro - "mar ocean beach"

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