DENDROLOGY

Detailed explanation-1: -Many ecosystems benefit from periodic fires, because they clear out dead organic material-and some plant and animal populations require the benefits fire brings to survive and reproduce.

Detailed explanation-2: -Examples of ecological disturbances include fires, landslides, flooding, windstorms and insect and pest outbreaks. Disturbances often come in the form of short-term or temporary changes to the landscape but can have very significant ecosystem impacts.

Detailed explanation-3: -Invasive species – Introduction of non-native plants and animals is one of the greatest threats to sensitive ecosystems, because they frequently disrupt or displace established plant and animal communities.