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Environmental Snapshots Marine and Coast

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  • Created: 11/2/2025

tied to river health. Rivers carrying sediment, nutrients or pollutants can harm estuarine habitats. Hei inenga | What we measure Estuary macrofauna are small invertebrates (animals without backbones) such as worms, snails, crabs, pipi and cockles and can be seen with the naked eye. Mud content is the amount of fine sand and silt, washed from the land, found on the surface of estuary mudflats. Contaminants are pollutants that may harm people or marine life;