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Fire Ecology and

Biodiversity


School of Ecosystem and Forest Sciences | Faculty of Science

University of Melbourne

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How do vegetation types and post-fire age classes contribute to plant diversity?

31/3/2015

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Foothills
Foothills forest
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Damp scrub
Tall mixed woodland
Tall mixed woodland
Heathland
Heathland
A common aim of fire management is to maintain plant diversity at the landscape scale, so disentangling the effects of fire from underlying environmental variation is important.

In our new paper published in Forest Ecology and Management, we studied the effects of both environmental factors (vegetation type) and fire history on plant diversity in the Otway Ranges. Our survey units were 100-ha mosaics containing different numbers of vegetation types and post-fire age classes.

We found, as expected, that plant diversity increased with the number of vegetation types in mosaics, and we also detected a weaker positive relationship between plant diversity and the number of age classes. This effect was much stronger, however, when each vegetation type was considered separately, and species diversity was more sensitive to the number of age classes in productive wet forests than in drier heathlands.

In variable landscapes, the effectiveness of mosaic burning for maintaining plant species diversity is best assessed at a small scale, within vegetation types.



JS Cohn, J Di Stefano, F Christie, G Cheers, A York (2015) How do heterogeneity in vegetation types and post-fire age-classes contribute to plant diversity at the landscape scale? Forest Ecology and Management. 346: 22-30.
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What do you think about emotive language in science?

19/3/2015

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Are foxes invasive feral vermin, or simply introduced?  When shrub cover increases, should we describe the process as shrub encroachment, invasion, expansion or woody thickening? Does it make a difference if the shrub species is indigenous?

In a paper now available in Austral Ecology early view, we looked at associations between native mammal occurrence and Yarra Burgan Kunzea leptospermoides canopy cover in a eucalypt forest.   

Our findings made us wonder how much terminology might influence decision-making, even by scientists.  Read more at Bron’s blog or download the paper.
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    Fire Ecology and Biodiversity at UniMelb

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Photos contributed by Holly Sitters, Bronwyn Hradsky, students of the Fire Ecology and Biodiversity Group, and remote cameras.
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