Seagrass is a threatened yet crucial coastal ecosystem

Seagrass are ancient plants that grow under the oceans of the world. They evolved 100 m years ago during the age of dinosaurs. They are found in bays and estuaries across the globe. Seagrass provide food and shelter for many marine species. Seagrasses stabilise the coasts and provide buffers against storms, fix carbon dioxide, filter water and add value to local economies. But they are degrading rapidly. It would result in an ecosystem collapse. Restoring them could help conserve coastal ecosystems and estuaries. The question is how sea levels will affect their survival. This video from Changing Seas describes this ecosystem and ways to preserve it.