Abiotic Factors in Ecosystems

What happens when non-living factors in an ecosystem are altered, such as rainfall or air quality? Biology - Ecosystems - Learning Points. An ecosystem is a living system interacting with its physical habitat. Changes in biotic and environmental factors can be devastating. If a water source dries out, a wetland can turn to barren mud flats. Pollution is changing our climate and disrupting many ecosystems. A Twig Context Film. Reinforce and extend the learning required by the curriculum. Twig’s context films show abstract concepts in action in the real world.