Why don't evergreen trees lose their leaves in winter?

Answer 1

Coniferous trees, other than those that are deciduous such as the baldcypress tree [Taxodium distichum] look green all year long because they drop and regrow their foliage in the course of more than a year instead of the less than a year that's the hallmark of deciduous trees.

Answer 2

Evergreen trees have adapted to withstand cold winters by retaining their leaves, which are typically needle-like or scale-like. These leaves have a thick cuticle and reduced surface area, allowing them to retain water and continue photosynthesis throughout the winter. This adaptation helps evergreen trees maintain their energy production and growth, even in cold and snowy conditions.

Answer 3

because your mom keeps putting leaves on them

They do lose their leaves as the leaves age but not all at once.

The leaf loss is spread thoughout the year so the loss is not noticed.

Answer 4

Because in the winter or the dry season it becomes difficult for the tree to maintain its water balance as there is less free water available in the soil. The lack of water damages the leaves cells. Instead of remaining actively growing during this time of the year the tree enters a dormant period. win
If the leaves on deciduous trees did not fall, the water in the leaves would freeze causing the cells in the leaf to eat themselves from the inside using the lysosomes.

In addition: Its to protect the tree. It makes the tree less heavy when coated with ice because of less surface area. It makes the tree more wind resistant during winter storms. Deciduous trees don't have tap roots like pine trees and the roots travel far from the trunk, just not deep. If they did not lose their trees every fall, the winter could damage the tree badly or kill it. In addition:The days begin to get shorter after the summer solstice, but are still longer than the nights. By the time after the autumnal equinox arrives, days still get shorter and the nights are longer than the days (the days last fewer than 12 hours). If a day does not last as long as or longer than a night during a period of 24 hours, there is not enough daylight for leaves to hold their chlorophyll, so the leaves dry up and become different colors and then fall off the trees.
If the leaves on deciduous trees did not fall, the water in the leaves would freeze causing the cells in the leaf to eat themselves from the inside using the lysosomes. In addition: Its to protect the tree. It makes the tree less heavy when coated with ice because of less surface area. It makes the tree more wind resistant during winter storms. Deciduous trees don't have tap roots like pine trees and the roots travel far from the trunk, just not deep. If they did not lose their trees every fall, the winter could damage the tree badly or kill it. In addition:The days begin to get shorter after the summer solstice, but are still longer than the nights. By the time after the autumnal equinox arrives, days still get shorter and the nights are longer than the days (the days last fewer than 12 hours). If a day does not last as long as or longer than a night during a period of 24 hours, there is not enough daylight for leaves to hold their chlorophyll, so the leaves dry up and become different colors and then fall off the trees.
Trees lose their leaves because the leaves have fully matured and are no longer needed. The leaves falling is part of a tree maturing. When leaves fall, it allows for pollination to occur and new leaves to grow.

Answer 5

Plants which loose their leaves in the fall/ autumn are called deciduous.

Leaf fall is triggered by a number of factors:

• Decrease in average daylight hours

• Decrease in average temperature

• and in some instances decrease in the level of available moisture.

At this point enzymes are released into the plant and stop the production of chlorophyll (the green photosynthetic pigment in leaves and stems). Some species of plants absorb what nutrients are left in the leaves back into the trunk or stem of the plant, in most cases other pigments such Beta-Carotene and Xanthophyll are left behind in the leaves (enhancing the colour effect)

An abscission layer forms between the petiole and the stem, this is basically a layer of callus cells so that the leaf does not leave an open wound when if falls, the abscission layer also facilitates the breaking away of the leaf from the stem.

Leaves fall when the abscission layer breaks - disturbed by the wind or under their own weight.

There are a number of reasons why deciduous plants drop their leaves:

• Fall is normally the onset of cold winters, in most cases if the foliage remained behind on the tree it would simply be damaged by snow, frost or wind. Ice crystals can begin to form in the cells at a temperature of about 4 degrees C, these grow and puncture/ rupture the cells killing them; this is the reason for the cold related phenomon known as "black frost"

• Some winter climates have snow, this means that there is in actual fact very little usable water available to the plant (ground water is frozen and snow does not melt readily and provide sufficient water for the plant to survive).

• Trees with large surface areas in storm frequented areas are regularly damaged by high winds, shedding leaves increase the aerodynamics of the plant and is a survival mechanism.

• The leaves which are shed collect around the base of the plants and are normally covered by snow, this assists in creating a bit of a buffer zone and possibly preventing root damage (like a blanket).

• After winter the fallen leaves decompose and release what nutrients and minerals they have stored inside them back into the soil - which the plant then reabsorbs.

Answer 6

Coniferous trees don't lose their leaves in the fall because it's as a adaptation to low nutrient levels.

Answer 7

Evergreens are covered in a wax like coating and the cells contain a fluid that resists freezing .

Answer 8

No, except for a couple of exceptions the Ginko and the Larch which do drop their leaves in Autumn.

Answer 9

The deciduous trees of temperate forests lose their leaves in the fall. This is a survival tactic for dealing with the long, cold winters often experienced in temperate forests.

Answer 10

They have needles instead of leaves because they can support the heavy weight of the snow better than leaves