Ecology 6th Edition by Charles Krebs

تمرين 10

Bracken fern ( Pteridium aquilinum ) often invades lowland heaths in Britain and develops a dense, uniform stand with a very depauperate flora and fauna. To reverse this habitat deterioration, various chemical and physical control methods were carried out over 18 years, but the objective of this restoration scheme (to restore heather heathland) was not achieved. Read Marrs et al. (1998) and discuss the reasons for the failure of this restoration program.