Q.45 The zone of transition between two communities is called:
1. Ecad
2. Ecotone
3. Ecotype
4. Edge effect
The zone of transition between two communities is called ecotone.
Option Breakdown
This question tests ecological boundary concepts; only one precisely defines the transition zone.
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Ecad: A phenotypic variant of a species adapted to a specific microhabitat within its population, not a zone between communities.
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Ecotone: Correct answer—the transitional boundary area where two ecosystems or communities meet and blend, often with higher biodiversity.
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Ecotype: A distinct subspecies or population genetically adapted to a unique environment, like a local race, but not a spatial transition zone.
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Edge effect: The ecological changes (e.g., increased species interaction) occurring at ecotone boundaries due to exposure, not the zone itself.
The zone of transition between two communities ecotone acts as a dynamic boundary where ecosystems blend, boosting biodiversity like in mangroves or grasslands.
Key Characteristics
Ecotones feature intermediate conditions, tension zones with high species density, and edge species unique to the area; they can be narrow (forest-grassland) or wide (forest-desert).
Why Not Other Terms?
Ecad refers to habitat-modified individuals, ecotype to genetically distinct populations, and edge effect to boundary impacts like predation rise—not the transition zone itself.
Ecological Role
These zones enhance resilience, host diverse flora/fauna, and signal environmental change; examples include estuaries (fresh-saltwater) and riverbanks.
