The stratospheric ozone layer is important to ecosystems because it provides the air we breathe keeps atmospheric gases balanced ensures lakes and oceans do not lose water absorbs and scatters uv light keeps the temperature of earth stable

absorbs and scatters UV light

Explanation:

The ozone layer is a sub-layer in the stratosphere. This layer is composed entirely of ozone (O³). It is a layer that has enormous importance for the life on our planet.

The importance of the ozone layer is that it has the ability to absorb and scatter much of the UV light that comes from the Sun. The UV light is very dangerous, and if its not stopped and it reaches the surface of Earth in its full power, than it will fry pretty much every living organism on Earth. The ozone stops that, and it literary acts as a protector of the life on Earth.

This layer had experienced severe damage during the past century because of the usage of some chemicals by the humans. The chemicals reacted with it and destroyed it, creating holes in the ozone layer. Luckily, the danger was seen, so the countries regulated the usage of the dangerous chemicals, so the ozone layer started to recover, and it is expected that in couple of decades it will be back to its initial shape.