Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Great Barrier Reef' has mentioned 'Algae' in the following places:
Occurrence Sentence Text Source
[53] Five hundred species of marine algae or seaweed live on the reef,[40] including thirteen species of genus Halimeda, which deposit calcareous mounds up to 100 metres (110xc2xa0yd) wide, creating mini-ecosystems on their surface which have been compared to rainforest cover.
[70][71][72] It is thought that the poor water quality is due to increased light and oxygen competition from algae.
Extensive beds of Halimeda algae represent active calcification and accretion over thousands of years.