Not exactly Astro Turf, but artificial sea grass, is being used to replace lost plant cover in Coromandel estuary reserve by the National Institute of Water and Atmospheric Research (NIWA) in New Zealand.
It’s thought that increased sedimentation through wash-off from land development projects, has lead to a decline in sea grass. Some species of fish have seen a decline in numbers as less survive into adulthood. This is considered the result of increased predation due to loss of cover afforded by the structure of sea grass in their nursery grounds.
It’s not just a local problem maybe this will become a world wide solution.
See reports and video: