Forest logging creates fire traps: academic
Decades of industrial logging in Australia's wet forests have made them more fire prone, raising urgent fire management issues, according to an ANU academic.
Professor David Lindenmayer of the Fenner School of Environment and Society challenges current fire protection practices in the March issue of Australasian Science magazine.
"Much discussion focuses on how to best protect human lives and built assets," Professor Lindenmayer writes. "But management also needs to counter the effects of past forestry activities on fire regimes.
"A prominent question is how much fuel or hazard reduction burning is needed to reduce risk. However, widespread fuel reduction burning is not an option in Australia's moist forests and rainforests as they are generally too wet to burn in a controlled manner. Conversely, past forest management, particularly logging operations, may have significantly increased the fire risk.
"Research in tropical rainforests suggests that logging reduces the number of dry days needed to make a forest combustible from 30 to less than eight days. Logging also alters the density and spatial pattern of trees, the spacing between crowns, and other forest attributes in ways that increase their susceptibility to fire. In moist forests in south-eastern Australia, logging has shifted the vegetation toward a composition that is more characteristic of drier forests that tend to be more fire-prone.
"Clear felling of moist forests in southern Australia has produced dense stands of regrowth saplings, thereby creating more available fuel than if the forest was not clearfelled. Furthermore, debris from logging can also sustain fires longer than fuels in uncut forest, while roads required for logging increase the number of ignition points for wildfires and lightning strikes are more likely in logged areas due to logging slash."
Prof Lindenmayer concludes that fire management "will become increasingly important with rapid climate change," and advocates "creating extensive buffer areas that exclude logging near human settlements within landscapes dominated by moist forest… [and] from areas where human disturbances (like timber harvesting) have been limited, such as the old growth wet forests in Tasmania and eastern Victoria."
Source: The Australian National University
Have your say...
The approval of your comment is at the discretion of this article's publisher. Write your comment with the following in mind to ensure the highest likelihood of it being approved:
- No promotional undertones
- No use of profanity
- Good spelling, grammar and layout
- Check punctuation, language and missing words
- No use of aggression
- No unsubstantiated claims
We reserve the right to remove comments at our discretion.
Your name is used alongside Comments.