Slide 1
Rainforest height creates different living layers
A tropical rainforest contains different living layers. Tall emergent trees, canopy, understory and forest floor experience different light and exposure.
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These layers are useful descriptions, not rigid floors. Branches, climbing plants and moving animals connect them, so conditions change gradually through one continuous ecosystem.
Slide 2
Canopy leaves intercept much of the sunlight
Leaves near the forest's upper surface capture much of the sunlight. Plants nearer the ground grow in a dimmer environment.
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Canopy conditions also include stronger wind and greater exposure than sheltered lower areas. A plant's height changes more than its access to light; it alters its immediate climate.
Slide 3
Plants below must cope with shade
Understory plants live with limited light beneath taller neighbours. Some persist there, while young canopy trees wait for a chance to grow upward.
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A seedling bank can already be present when a gap appears. The next generation does not always begin from seeds arriving after the disturbance; established young plants may respond first.
Slide 4
A fallen tree opens a gap in the canopy
When a canopy tree falls, a gap admits more light. The local conditions experienced by seedlings and understory plants can change rapidly.
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Fast-growing species may gain an early advantage, followed by other trees over time. The gap's history becomes part of the forest's patchwork rather than resetting the entire forest at once.
Slide 5
Animals connect the layers by moving food, pollen and seeds
Animals move food, pollen and seeds among rainforest layers. Their journeys connect resources produced in different parts of the forest.
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A species' feeding location may differ from where it nests or rests. Understanding its habitat requires following those movements rather than assigning it to one permanent level of the canopy.
Sources
- Rainforest Layers
Smithsonian Tropical Research Institute
- Canopy
Smithsonian Tropical Research Institute