Kangaroo abundance should increase with increasing primary productivity in a two-trophic link system where dingoes are rare; and that kangaroo abundance would remain relatively constant regardless of primary productivity in a three trophic link system where dingoes are abundant.
Type of Study:
kangaroo populations are primarilytop–down regulated in the presence of dingoes, but are bottom–up regulated in the absence of dingoes
Dingo control vs un-controlled properties
Kangaroo populations not influenced by artifical water points, but predation by dingoes.
Response variable :
index of abundance
9 paired sites: 24–30 track detection stations at 1 km intervals. 25 and 30 dung transects at each sub-site, with the transects spaced at 1 km intervals.
Letnic M. & Crowther M. S. (2013) Patterns in the abundance of kangaroo populations in arid Australia are consistent with the Exploitation Ecosystems Hypothesis. Oikos 122, 761-9.