1. Geochemical cycles

2. Introduction
One of the ecosystem services from our environment is cycling of nutrients and elements.
Otherwise we would run out of resources!
Four main components (biosphere, lithosphere, hydrosphere & atmosphere – hence the term bio-geo-chemical cycles)

3. Overview

4. The Carbon cycle

8. Sulphur cycle

9. And of course, the Water Cycle
All other cycles dependent on it!

10. Alterations to biogeochemical cycles - by humans
Alterations to runoff/damming/extractions
Change in land cover/deforestation/irrigations
Mining/fertilisers/pesticides/monocultures
Industrialisation/urbanisation/pollution
Invasive species/habitat fragmentation
Ozone depletion – climate change – & consequent disasters!
etc.

11. Questions?