Definition - What does Biosphere mean?
Biosphere is the name given to the entirety of the earth's ecosystem that supports life. This includes all areas of the earths surface that contain living organisms or provide life support for them, as well as the earths atmosphere and the earth's waters. Any place that can support life of any kind is part of the biosphere. It includes both living organisms and their environment.
Safeopedia explains Biosphere
The biosphere is likened to a very intricate and delicate system that must continue to function properly. This is dependant on maintaining the interactions between local species and also the broader interactions between all different species and their communities across the entire globe. However, the biosphere is influenced by many different factors including things like global warming, extinction, population change, and pollution etc..