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How do plants and animals contribute to soil formation on coral reef islands?

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coral reef The Great Barrier Reef, off the coast of Queensland, Australia, is the world's largest coral reef.

On coral reef islands, soil formation is a gradual process that begins once the land is colonized by various organisms. After an island forms through the accretion of reef rock, sand, and other detritus, plants and animals begin to inhabit the new surface.1

These organisms contribute to the development of soil by adding their own organic remains to the existing calcareous material. As plants and animals die and decompose, their biological matter mixes with the mineral-rich reef sediments, facilitating the creation of soil. Additionally, certain plants, such as mangroves and sea grasses, as well as blue-green algal mats, play a vital role in the broader reef environment by trapping and stabilizing sediment, which further supports the accumulation and structural integrity of the island complex.12

This biological input is essential for transforming the raw, limestone-based substrate into a more hospitable environment capable of supporting further life.1