As on land, reintroductions and population reinforcements can help the process of natural recovery to get started.
They are particularly useful:
Where a species has gone locally extinct or populations are extremely depleted.
If a marine species is very slow growing (e.g. seagrass) and replanting can help to speed their regeneration. Here, replanting provides important habitat for juvenile fish and grazing grounds for turtles, providing benefits throughout the trophic chain.
The illustration below depicts the trophic chains in the North Sea. Take a moment to reflect in the interactions and natural processes in this image.