Each year it gets a little harder to ignore the impacts of climate change. For us mountain folk, the obvious signs are the more erratic winters, the dwindling snowpack, and the longer fire seasons that, increasingly, disrupt our summers.
Every natural ecosystem on the planet is being impacted by climate change. In the Australian high country, the two most obvious victims are alpine ash and snow gums. It is impossible to miss the walls of grey dead trunks and the thick and flammable regrowth as you drive up into the mountains from any valley town. Climate change is making our fire seasons longer and snow gums are increasingly being burnt beyond their ability to recover. Research from Latrobe University[1] shows that ‘long unburnt’ snow gums are now ‘exceedingly rare’ in the Victorian Alps, comprising less than 1% of snow gum forests.
And dieback is now killing thousands of trees. Dieback is a natural phenomena, caused by a native beetle. However, climate change appears to be ‘super charging’ the scale of the impact. This is because winters are shorter and warmer (meaning more beetles survive the cold months) and summers are hotter and drier (meaning trees are more water stressed and less able to produce the sap that acts as a defence against beetle infestations).
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