Taylor ecology report

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[OCR of page images]
This litter is up to 5 cm deep near the tree bases yet elsewhere within the vegetation
covenant where the canopy is sparse or non-eucalypts predominate, the litter layer is
almost non-existent.

The canopies of these particular trees are also reaching roof height and in close proximity to
the building. The collection of leaf litter in gutters also contributes to the bushfire hazard.

Note that the volatile oils in eucalypt leaves renders this type of litter much more flammable
than leaf litter from other existing species such as Wattles, Bribie Island Cypress and
rainforest specimens.

A further positive aspect in achieving a low fuel zone was the evidence of some low level
pruning of eucalypts. Conversely some prunings have been disposed of within the covenant
area. Although the latter forms part of the recommendations for slope stability and general
environmental restoration, such disposal adds to the fuel load within the covenant area
which is not desirable.

Note that it is an accepted principle of bushfire behaviour that the fuel of concern for a
bushfire is that which is contained in the ground and mid-level strata and not the trees
themselves.

It was also noticeable that some standing dead vegetation — much of it in the lower strata —
remains near the low fuel zone. It is unlikely that such material will contribute to faunal
habitat due to its size but conversely this material adds substantially to the fuel load. Any
fire whose intensity is increased by such material has the propensity to be detrimental to
faunal values.

Apart from the aforementioned eucalypts there are no other plant species within the
property’s gardens or in the low fuel zone within the covenant area that would require
immediate management to control the fuel load.

A single occurrence of Asparagus Fern near the low fuel zone was the only obvious weed
noticeable in the inspection and it should be removed.

Findings — Arboriculture

The aforementioned eucalypts growing near the boundary fence as well as another
specimen inside the fence are relatively young and vigorously growing. Their canopies even
at this stage swing close to the building and even without pruning these canopies are only
going to get much larger.

Another centrally located eucalypt about 5 metres from the boundary fence is growing close
to other eucalypt trunks and as a consequence is severely unbalanced due to the crown
growing towards the building. The stability of such a specimen is always compromised.

 

Taylor Ecology Covenant Area Management — August 2014 Iluka, Serenity Close Noosa