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Nitrogen distribution and landscape function in grazed and ungrazed semi-arid tropical savanna, north Queensland

 

This project investigates the effects of cattle grazing on the distribution of nitrogen in a semi-arid tropical savanna and how this relates to landscape function.

Researchers record field dataPlant and soil N characteristics are analysed in relation to grazing pressure, topographic position and season. The general condition of savanna exposed to grazing will be assessed using Landscape Function Analysis and compared to sites where large grazing animals have been excluded for the past 15 years.

The key research questions are:

  • What is the spatial distribution and dynamics of nitrogen within this semi-arid savanna?
  • How are nitrogen distribution and dynamics affected by grazing and how do they relate to landscape function?

Results will increase our understanding of nutrient dynamics in trees and grasses within such savanna landscapes, and this can contribute to the future management of grazing in savannas.

   
Supervisors:
 
  • Dr Susanne Schmidt, UQ
  • Dr John Ludwig, CSIRO Sustainable Ecosystems
  • Prof Hugh Possingham, UQ
Associated Groups: (external sites)
 
Contact Details:
 

Elizabeth Poon
PO Box 780, Atherton
Queensland 4883 Australia

Phone

 

+61 (0)7 4091 8800

Fax

+61 (0)7 4091 8888

Email

Liz.Poon@csiro.au


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