The correct order for the process of plant succession is 3. B, A, C, E, D (Nudation → Migration → Ecesis → Reaction → Stabilization).

Detailed Process Explanation

Plant ecological succession follows Clement’s classic model with these sequential stages:

1. Nudation (B): Bare area creation via disturbance (volcanic eruption, fire, flood) exposing substrate.​

2. Migration (A): Dispersal of propagules (seeds, spores) to the site by wind, water, animals.

3. Ecesis (C): Germination and establishment of pioneer species adapting to local conditions.​

4. Reaction (E): Existing community modifies environment (soil formation, nutrient cycling), enabling successor species invasion.​

5. Stabilization (D): Climax community reaches equilibrium, self-perpetuating with stable species composition.​

Options Explained

1. B, A, E, C, D: Wrong—Reaction (E) before Ecesis (C); pioneers must establish before habitat modification.​

2. A, B, C, E, D: Wrong—Migration can’t precede Nudation; no bare area exists for colonization.​

3. B, A, C, E, D: Correct—Standard sequence: bare area → arrival → establishment → modification → climax.

4. B, C, A, D, E: Wrong—Ecesis before Migration illogical; seeds must arrive before germination.​

Introduction
The correct order for the process of plant succession is Nudation → Migration → Ecesis → Reaction → Stabilization, transforming barren land into stable climax communities through predictable seral stages.​

Succession Stages Defined

• Nudation: Substrate exposure (e.g., lava flow).​

• Migration: Propagule dispersal to site.​

• Ecesis: Pioneer establishment (lichens, mosses).​

• Reaction: Environmental modification by pioneers.​

• Stabilization: Climax vegetation equilibrium.​

Stages Sequence Table

Exam Significance

This sequence appears in NEET/UGC-NET ecology; remember “NMERS” (Nudation-Migration-Ecesis-Reaction-Stabilization).​