If a tropical rain forest is removed, it does not regenerate quickly as compared to a tropical deciduous forest. This is because
A
the soil of rain forest is deficient in nutrients
B
propagules of the trees in a rain forest have poor viability
C
the rain forest species are slow-growing
D
exotic species invade the fertile soil of rain forest
Correct Answer: Option A
Explanation
1. Tropical rain forest ecosystems, despite high biomass, typically have soils (often lateritic) that are surprisingly deficient in nutrients.
2. The majority of nutrients are held within the living vegetation rather than the soil itself.
3. Constant heavy rainfall leads to significant leaching, washing soluble nutrients out of the topsoil.
4. When the rain forest vegetation is removed (e.g., through deforestation), the main nutrient store is lost, and the exposed soil becomes vulnerable to further depletion and erosion.
5. This inherent nutrient deficiency in the soil makes it difficult for the forest to regenerate quickly after disturbance, unlike tropical deciduous forests which often have more nutrient-retentive soils.
6. Options B, C, and D are less accurate explanations for the difference in regeneration rates compared to the critical factor of soil nutrient availability.