In your own words, explain the following: ecological succession, disturbance, pioneer species, annuals, and hardwood trees.

Well, let's see

Ecological succession would be the changing of the ecosystem which changes habitats and leaving nothing the same
Disturbance would be to interrupt or cause mischief to a peaceful ongoing or condition
Pioneer species would be a type of species that is the first to form after a damage of ecosystems
Annuals would be an event that only occurs once a year
Annndd last but not least
Hardwood tress would be a type of wood tree that is harder than softwood tree.
Hope you likes this answer

Reduction in overall biodiversity