miércoles, 11 de agosto de 2010

Savanna♥

Savanna is a grassland ecosystem characterized by the small amout of trees, which are either too small or too spaced, and this leads to an unclosed canopy. Savannas are characterized by their seasonal water availability caused by the low precipitation and the higher temperature during dry season.
A food chain that is present in the Savanna is the following: (shea fruit-->african elephant-->lion)
With information about the quantity of each organism in certain area, several ecological pyramids can be done in order to have a graphical representation of the relationships between the different tropical levels. The pyramids that can be generated are:


  • Pyramid of numbers: which represents the storages found at each trophic level.




  •  Pyramid of bimass: that represent the standing stock at each trophic level.





  • Pyramid of Productivity: represents the flow of energy through each trophic level. 

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