Question

Какие изменения происходят у деревьев и кустарников осенью

Answer 1

Листья деревьев и сами стволы деревьев начинают преображаться к осенней поре,листья желтеют и краснеют

Answer 2

Для начала листья желтеют , краснеют . Потом они засушиваються и выпадают . А уже выпавшими удобряют земную кору

Answer 3

Changes in Trees and Shrubs During Autumn

Autumn is a season of change, and this is particularly evident in trees and shrubs. During this time, several notable changes occur in their appearance and behavior. Let's explore some of these changes:

1. Leaf Color Change: One of the most striking transformations that occur during autumn is the change in leaf color. As the days become shorter and temperatures drop, trees and shrubs undergo a process called "leaf senescence." This process involves the breakdown of chlorophyll, the pigment responsible for the green color of leaves, revealing other pigments such as carotenoids (yellow, orange) and anthocyanins (red, purple). The combination of these pigments creates the vibrant autumn foliage that we often associate with this season.

2. Leaf Drop: As autumn progresses, trees and shrubs shed their leaves in preparation for winter. This process, known as "leaf abscission," is triggered by changes in light and temperature. The tree forms a layer of cells called the abscission zone at the base of each leaf stem. This layer gradually severs the connection between the leaf and the tree, causing the leaf to fall off. Leaf drop helps trees conserve energy and protect themselves from freezing temperatures and water loss during winter.

3. Fruit and Seed Production: Autumn is also a time when many trees and shrubs produce fruits and seeds. These fruits and seeds serve as a means of dispersal, allowing plants to spread their offspring to new locations. Some examples include acorns from oak trees, berries from holly bushes, and samaras from maple trees. The fruits and seeds often have adaptations that aid in dispersal, such as being carried by wind, animals, or water.

4. Growth and Dormancy: During autumn, the growth of trees and shrubs slows down as they prepare for the dormant period of winter. This is a time when metabolic activity decreases, and plants conserve energy and resources. The growth of new shoots, leaves, and flowers is temporarily halted, and the focus shifts to strengthening roots and storing nutrients for the following spring.

5. Wildlife Habitat: Autumn brings changes not only for trees and shrubs but also for the wildlife that depends on them. Many animals rely on trees and shrubs for food, shelter, and nesting sites. The fruits, seeds, and nuts produced during this season provide a valuable food source for birds, squirrels, and other wildlife. Additionally, the falling leaves create a layer of organic matter that contributes to the nutrient cycle and provides habitat for insects and other small organisms.

In conclusion, autumn is a season of transformation for trees and shrubs. The changes in leaf color, leaf drop, fruit and seed production, growth and dormancy, and the creation of wildlife habitat are all part of the natural cycle of these plants as they prepare for the coming winter and the renewal of spring.

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