Ecosystems intro - December 2010

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  • 1. Ecosystems
    • Communities interact with their environment
  • 2. Living things don’t just interact with each other in a community. cc licensed flickr photo by jfortugaleza: http://flickr.com/photos/30594175@N05/3230112383/ They also interact with the non-living components of their environment
  • 3. Ecosystem - an area in which a community interacts with its non-living environment
  • 4. Two components of an ecosystem: biotic - living (i.e. the community) abiotic - non-living
  • 5. Matter within an ecosystem is recycled in biogeochemical cycles. cc licensed flickr photo by lanier67: http://flickr.com/photos/lanier67/184302007/ pathway through which a chemical element or substance moves through both biotic and abiotic components
  • 6.  
  • 7. Evaporation - liquid water absorbs heat to become water vapour
  • 8. Condensation - water vapour in air condenses into tiny liquid water droplets
  • 9. Evapotranspiration - water evaporates from the leaves of plants
  • 10. Sublimation - solid ice/snow turns directly into gaseous water vapour.
  • 11. Precipitation - water droplets in air fall to surface of earth as liquid rain or solid snow/hail.
  • 12. Infiltration - liquid water seeps into soil to become groundwater
  • 13. Discharge - groundwater drains into rivers or lakes
  • 14. Storage - water can remain for extended periods in underground reservoirs called aquifers.