The impact of fire on the quality of drooping sheoak (Allocasuarina verticillata) cones for the endangered Kangaroo Island glossy black-cockatoo (Calyptorhynchus lathami halmaturinus)

The Kangaroo Island glossy black-cockatoo (Calyptorhynchus lathami halmaturinus) is an endangered subspecies that feeds almost entirely on the kernels of drooping sheoak (Allocasuarina verticillata). Hence, it highly susceptible to changes in quantity or quality A. verticillata. Fire has potential severely impact feeding habitat island, but since verticillata serotinous, partially reliant fire for regeneration. Here, we quantified effects time-since-fire (over a 60-year period) cone C. halmaturinus. Cone woodlands with range histories was examined using three measures profitability: ratio seed-to-cone mass (Clout’s Index), kernel-to-cone (Kernel Ratio) and proportion seeds containing (Seed Fill). We then mapped history before after 2019/20 bushfire season. found had significant negative Clout’s Index, as well non-significant Seed Fill Kernel Ratio. This suggests trees have not experienced over 60 years may cones are lesser value concerning, because up 94% impacted by bushfires likely similar age class, having no years. Our findings highlight need ongoing assessment management critical this subspecies.