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Climate change and the Great Barrier Reef

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Fill-in-the-blanks to complete this information on how climate change threatens the Great Barrier Reef.

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Sobre Completar frases
biology
great barrier reef
coral bleaching
 Edad recomendada: 16 años
4 veces realizada

Creada por

Belinda Schirmer
Belinda Schirmer
Australia

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Climate change and the Great Barrier Reef

Fill-in-the-blanks to complete this information on how climate change threatens the Great Barrier Reef.

Belinda Schirmer
1

lifecycle stationary location animals

The larvae of hard corals are tiny that move around in the open water for up to a month , until they find a place to settle . Once a suitable is found , a larvae moves into the next stage of its and becomes a polyp . Polyps are organisms . Large numbers of polyps usually live together in a colony - called a coral .

2

inside food algae colour

Reef - building corals are a type of hard coral . They rely on a symbiotic relationship with tiny called zooxanthellae . These algae live and multiply the polyps . Zooxanthellae are photosynthetic organisms . They provide for the coral polyps and also give reef - building corals their .

3

degrees tissues short beautiful temperature source die

Reef - building corals are very sensitive to water . Increases to water temperatures of only a couple of puts these corals under thermal stress . When a coral is stressed , it expels the tiny symbiotic algae that live within their . This is problematic , as these algae are the coral's main food . Incidentally , when the algae leave , it also causes the corals to lose their colours . If water temperatures return to normal within a relatively period of time ( weeks ) , the zooxanthellae will return to the coral . However , if warm temperatures persist , the bleached coral will from starvation .

4

dioxide water bleaching Barrier

Increased levels of coral have been observed in ecosystems such as Australia's Great Reef . These are directly associated with increases in average temperature due to increased carbon levels in the atmosphere .

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