Poor fen is usually grazed by wild animals or livestock, which prevent ecological succession into wet woodland.

ERS rely on a continued supply of sediment from upstream, and periodic disturbances from flooding to prevent ecological succession to more vegetated riparian habitat.

Fire prevents ecological succession in the open habitat where the plant grows.

Wildfire maintains it in a relatively open state, preventing ecological succession from occurring.

If Saddam's ouster is the goal, what are we doing to prevent succession by a regime like his own - Himmler succeeding Hitler?

Scrub invasion is managed to maintain a state of semi-equilibrium and prevent succession to a climax community.

This removed any invading species, prevented ecological succession from occurring and preserved the diversity of the fenland.

Fire prevents ecological succession, maintaining a type of ecosystem in which the taller vegetation is kept small and sparse, allowing the herb layer to flourish in the sun.

Ostensibly, prevents succession by females if they are married to a foreigner.

Periodic wildfire halts the encroachment of large and woody vegetation, preventing ecological succession and keeping the canopy thin to allow sunlight to the herb layer below.