Deciduous and Coniferous Trees (Junior Cert Wood Technology): Revision Notes

Deciduous vs Coniferous Trees

Overview

• Deciduous Trees and Coniferous Trees are key to understanding wood as a material.
  Their special traits decide their use in areas like furniture and building.

Definitions

• Deciduous Trees:

  • Lose leaves every year.
  • Usually have broad leaves.
  • Called hardwoods, with seeds in fruits or nuts.

• Coniferous Trees:

  • Have needle-like or scaly leaves.
  • Known as evergreens, they keep leaves all year.
  • Called softwoods, with seeds in cones.

Comparison of Characteristics

• Leaf Structure:

  • Deciduous: Broad and flat leaves (e.g., oak, maple).
  • Coniferous: Needle-like or scaly leaves (e.g., pine, spruce).

• Reproduction:

  • Deciduous: Use wind or insects. Flowers make seeds in fruits or nuts.
  • Coniferous: Seeds are inside cones.

• Seasonal Behaviour:

  • Deciduous: Lose leaves in autumn, saving water in winter.
  • Coniferous: Keep leaves all year.

Diagram:

Geographic Distribution

• Deciduous Trees:
  • Thrive in temperate areas like North America, Europe, and Asia.
  • Important regions include Eastern U.S. and Central Europe.

Image:

• Coniferous Trees:
  • Found in boreal regions of North America, Northern Europe, and Asia.
  • Well-suited for cold areas with poor soil, like Canada and Russia.

Image:

Ecological Roles and Economic Uses

• Deciduous Trees:

  • Ecological: Provide homes, increase biodiversity, help recycle nutrients.
  • Economic: Timber for furniture, flooring, and products like oak and maple.

• Coniferous Trees:

  • Ecological: Reduce carbon dioxide and stop soil erosion.
  • Economic: Wood for construction, paper, and softwood products.

Life Cycle Traits

• Deciduous Trees:

  • Lose leaves in autumn for resource savings and seed spread. This aids winter survival.

• Coniferous Trees:

  • Keep leaves year-round, allowing for photosynthesis all year.

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