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South Australia is known to support up to many species of seagrasses, found in various water depths, waves and seabed types. Seagrass are marine flowering plants that have a true root structure, often growing in large meadows that can be monospecific (one species) or mixed species.  

Seagrass meadows are very important to the nearshore coastal environment. They help stabilise the seabed by holding sand with their roots and reduce the waves and currents near the seabed with their leaves.  They also provide both food and habitat for a variety of marine organisms.

Seagrass loss is a worldwide problem and this includes South Australia. While natural events such as storms can cause large-scale seagrass loss, in many areas human activity has also contributed to the decline in seagrass meadows in coastal areas.  

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