In the 17th and 18th centuries, the forest was intensively managed as coppice to provide cordwood for the production of charcoal.

As the human population grew, the wood was managed more and more intensively.

In many instances, Dr. Murphy says, there is not enough habitat to begin with, meaning that what is left must be intensively managed by humans.

The chalk streams have been intensively managed for many generations.

These ponds are intensively managed for migrating waterfowl, shorebirds and wading birds.

Much of it is intensively managed grassland carrying a heavy stocking of dairy cattle.

"It's an intensively managed production unit."

Refuge habitats are intensively managed.

"In essence, it is a nature reserve that's been intensively managed for fishing," said Ian Woolley, the trust's chief executive officer.

We must ensure that projects for intensively managed plantations are not subsidised at the expense of protecting biodiversity.