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Grazing kangaroos act as local recyclers of energyon semiaridfloodplains

Journal Article


Abstract


  • On Australian semiaridfloodplains, large herbivores such as kangaroos have a role in the cycling of energy(carbon)throughthemechanismoffeedinganddefaecationofvegetativematerial.Thedegreetowhichkangaroosarevectorsof energy within this system is not fully understood. This study describes the stable carbon isotope signature offloodplainplantsandkangarooscatsattwoclosestudysites.Kangarooswerefoundtodepositscatsthatmirroredtheforagecompositionat each particular feeding site. Scats were 3.94‰higher ind13C values at the site where C4grasses were available, indicatingthat this grass contributed ~25–30% of the diet of these kangaroos. The difference in diet due to the relative availability of C3and C4forage, detectable in the carbon stable isotope signature of scats, is used to demonstrate that kangaroos are recyclingand redistributing energy locally, rather than transporting it more broadly across thefloodplain.

Authors


  •   Iles, Jordan (external author)
  •   Kelleway, Jeff
  •   Kobayashi, Tsuyoshi (external author)
  •   Mazumder, Debashish
  •   Knowles, Lisa (external author)
  •   Priddel, D M (external author)
  •   Saintilan, Neil (external author)

Publication Date


  • 2010

Citation


  • Iles, J., Kelleway, J., Kobayashi, T., Mazumder, D., Knowles, L., Priddel, D. & Saintilan, N. (2010). Grazing kangaroos act as local recyclers of energyon semiaridfloodplains. Australian Journal of Zoology, 58 145-149.

Scopus Eid


  • 2-s2.0-77957196033

Number Of Pages


  • 4

Start Page


  • 145

End Page


  • 149

Volume


  • 58

Place Of Publication


  • Australia

Abstract


  • On Australian semiaridfloodplains, large herbivores such as kangaroos have a role in the cycling of energy(carbon)throughthemechanismoffeedinganddefaecationofvegetativematerial.Thedegreetowhichkangaroosarevectorsof energy within this system is not fully understood. This study describes the stable carbon isotope signature offloodplainplantsandkangarooscatsattwoclosestudysites.Kangarooswerefoundtodepositscatsthatmirroredtheforagecompositionat each particular feeding site. Scats were 3.94‰higher ind13C values at the site where C4grasses were available, indicatingthat this grass contributed ~25–30% of the diet of these kangaroos. The difference in diet due to the relative availability of C3and C4forage, detectable in the carbon stable isotope signature of scats, is used to demonstrate that kangaroos are recyclingand redistributing energy locally, rather than transporting it more broadly across thefloodplain.

Authors


  •   Iles, Jordan (external author)
  •   Kelleway, Jeff
  •   Kobayashi, Tsuyoshi (external author)
  •   Mazumder, Debashish
  •   Knowles, Lisa (external author)
  •   Priddel, D M (external author)
  •   Saintilan, Neil (external author)

Publication Date


  • 2010

Citation


  • Iles, J., Kelleway, J., Kobayashi, T., Mazumder, D., Knowles, L., Priddel, D. & Saintilan, N. (2010). Grazing kangaroos act as local recyclers of energyon semiaridfloodplains. Australian Journal of Zoology, 58 145-149.

Scopus Eid


  • 2-s2.0-77957196033

Number Of Pages


  • 4

Start Page


  • 145

End Page


  • 149

Volume


  • 58

Place Of Publication


  • Australia