Geochemical cycles.

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Presentation transcript:

Geochemical cycles

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)

Overview

The Carbon cycle

Sulphur cycle

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

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.

Questions?