Step 1: Understanding the Concept:
Ecological succession in forest communities proceeds through a series of orderly stages that transform a bare area into a stable climax community.
These stages are Nudation, Migration, Ecesis, Aggregation, Competition, Reaction, and Stabilization.
Step 2: Detailed Explanation:
Let us examine the stages of ecological succession related to the options:
- Ecesis (also known as establishment) is the phase where a migrating plant species successfully adjusts to its new habitat. This process spans from initial seed germination and seedling survival to vegetative growth and the eventual attainment of reproductive maturity (producing flowers and seeds).
- Competition describes the struggle among plants for limited resources such as light, nutrients, water, and space.
- Reaction is the mechanism where the established plant community modifies its local physical environment (e.g., soil organic matter, light levels).
- Aggregation is the subsequent increase in the local population of the newly established colonizers.
Step 3: Final Answer:
Therefore, the successful establishment of a plant in a new site from germination to reproduction is Ecesis, corresponding to option (D).