Mears Bush
Understanding Mears Bush
Life Cycle of a Forest
Bush Layers
Life cycle of a tree
Forests are important for our environment so we need to understand how they grow. The life cycle of a forest begins when trees spread their seeds through wind, water, or animals. Once the seeds grow into trees they must compete for resources like sunlight, water, and nutrients to grow as tall as they can.
Forest layers
In NZ there are 5 layers but in other countries there are often three.
The layers are called:
Forest floor
Understory
Sub-canopy
Canopy
Emergent
Forest life cycle
For a forest to grow it needs a balance between the different species of trees and other plants. This is the ecosystem. Disturbances like fires, storms, and human activity can disrupt this balance. Understanding the life cycle of a forest can help us manage and conserve them for future generations.
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Forests start from a small seedling that grow into an adult.
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As trees grow they too can produce seeds and continue the forest's life cycle.
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Over time forests can also experience disasters such as fires, insects, or diseases. While these events can be destructive they can also help the forest's seedlings grow.
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Eventually, forests reach adulthood and start to die off.
The forest floor, understory, sub canopy and a glimpse of the canopy.
The forest floor is a damp and mossy place. It has lots of interesting bugs like velvet worms and giant land snails.
The understory consists of young trees, taller ferns and shrubs, such as kawakawa. In our native bush this layer is very thick with plants, making it hard to walk through easily. The plants in this layer are no taller than about five meters tall.
The sub-canopy is mainly made up of tree ferns, nikau palms and small trees like mahoe, makomako and horopito. The plants in this layer normally grow to around ten meters in height.
The canopy is like the roof of the forest. The trees in this layer create a dense greenery that drains all rain and sunlight. Trees in the canopy grow to 20 meters tall.
The emergent layer are the trees that grow even taller, often over thirty meters, and tower over the bush. These trees are more spread out and do not form a dense greenery like the canopy. The emergent trees include rimu, totara and matai.