Man-made salt marshes 'falling short'.

Man-made salt marshes not as good as natural ones. Credit: ITV Anglia

Man-made saltmarshes in Norfolk and Essex are not providing wildlife with as good a home as their natural counterparts.

Scientists from the University of East Anglia claim that some of the created marshes aren't offering enough biodiversity.

The RSPB, which manages many of the saltmarshes, says they're an important way of supporting and protecting species.