Question

What is ozone layer?how does it affect any ecosystem. Write answer in long and in bullets

Answer 1

Answer:

Ozone is a molecule formed by three atoms of oxygen. At the higher levels of the atmosphere, it shields the surface of the earth from ultraviolet (UV) radiation from the sun. It may affect any ecosystem in the following ways:

(i) At the surface of the earth, it is a deadly poison for all lower forms of life.

(ii) If this layer gets depleted, then it may cause cancer in human beings including other plants and animals.

Answer 2

Answer:

Ozone is a molecule formed by three atoms of oxygen. At the higher levels of the atmosphere, it shields the surface of the earth from ultraviolet (UV) radiation from the sun. It may affect any ecosystem in the following way:

• At the surface of the earth, it is a deadly poison for all lower forms of life
• If this layer gets depleted, then it may cause cancer in human beings including other plants and animals.
• Ozone layer depletion increases the amount of UVB that reaches the Earth’s surface. Laboratory and epidemiological studies demonstrate that UVB causes non-melanoma skin cancer and plays a major role in malignant melanoma development. In addition, UVB has been linked to the development of cataracts, a clouding of the eye’s lens.
• UVB radiation affects the physiological and developmental processes of plants. Despite mechanisms to reduce or repair these effects and an ability to adapt to increased levels of UVB, plant growth can be directly affected by UVB radiation.
• Indirect changes caused by UVB (such as changes in plant form, how nutrients are distributed within the plant, timing of developmental phases and secondary metabolism) may be equally or sometimes more important than damaging effects of UVB. These changes can have important implications for plant competitive balance, herbivory, plant diseases, and biogeochemical cycles.

• Phytoplankton form the foundation of aquatic food webs. Phytoplankton productivity is limited to the euphotic zone, the upper layer of the water column in which there is sufficient sunlight to support net productivity. Exposure to solar UVB radiation has been shown to affect both orientation and motility in phytoplankton, resulting in reduced survival rates for these organisms. Scientists have demonstrated a direct reduction in phytoplankton production due to ozone depletion-related increases in UVB.

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