Tree Physiology and Water Runoff

The video discusses ornamental cherry trees, focusing on lenticels that facilitate respiration. It explains how water runoff can lead to algae and moss growth, potentially blocking lenticels. Some trees can shed bark to expose new lenticels. The video also covers dissolved organic carbons creating soapy effects in water and the acidity of tree bark, particularly in oak and lime trees, due to tannins.

What is the primary function of lenticels on an ornamental cherry tree?

• To store nutrients

• To facilitate air exchange

• To protect against pests

• To absorb water

How does water runoff affect the lenticels on a tree?

• It causes them to dry out

• It blocks them with algae and moss

• It enhances their function

• It has no effect

What is one way trees can respond to blocked lenticels?

• By absorbing more water

• By increasing root size

• By producing new growth

• By shedding leaves

What is the composition of the runoff that forms a soapy effect?

• Pollen and dust

• Dissolved organic carbons

• Minerals from the soil

• Insect secretions

Why is the bark of oak trees particularly acidic?

• Due to low sunlight exposure

• Because of the presence of tannins

• Due to high moisture content

• Because of insect activity

What industry historically used tannins found in oak bark?

• Pharmaceutical

• Construction

• Tanning

• Textile

What effect does the shape of lime trees have on water runoff?

• It absorbs all the water

• It creates natural runoff channels

• It causes water to pool at the top

• It prevents runoff

What is a common visual effect seen at the base of lime trees due to runoff?

• Cracked soil

• Foamy product

• Dry leaves

• Moss growth

Which trees are known for having very acidic bark?

• Birch trees

• Oak trees

• Maple trees

• Pine trees