07/2555 - Operational Works - Drainage Stormwater Vegetation [As Published] · 142007.2555

Attunga Heights Rehabilitation Specification 5

this approach represents a mid-way strategy between planting of all species and strata (as might
be appropriate for e.g. an isolated site with no natural recruitment) and a “recruitment only”
approach. To further enhance rehabilitation, prior to any clearing on-site, an ecologist should
flag native plant species suitable for retention, located in the 1.5m building and pavement buffer
zones. These flagged species should be protected during clearing.

Flora species for the broadly defined zones have been selected by firstly identifying the
vegetation community to which that zone belongs and secondly by identifying the missing or
degraded elements (e.g. species and structure) from that community. Investigations have
been carried out on site to provide a quantitative survey in order to identify the vegetative
dynamics of the site. A summary of this work is included as Attachment 1 to this
management plan. The work confirmed that the site is predominated by an upper canopy of
Bribie Island Pine (Callitris commellaris) with lower tree layers supporting a diversity of
rainforest species. Areas associated with the ephemeral watercourse and the Edgar Bennet
Avenue reserve support a canopy of rainforest species.

Further site inspections identified that some areas do not support canopy elements and some areas
support a dense ground layer of weeds. This further analysis formed the basis for defining broad
rehabilitation zones. This is outlined in section 5.

Fire control methods are specified in Appendix G: Fire Management Plan, of the Environmental
Management Plan.

4.5 PERFORMANCE TARGETS
Based on the aims and objectives of the rehabilitation work the following performance targets are

to be met prior to the off maintenance phase:

¢ Control ofall species regarded as ‘weeds’, and specifically control of all recognised and
potential environmental weeds;

e Establishment of missing floristic and structural elements;

e Establishment of Glossy Black Cockatoo feed trees;

e Enhancement of suitable habitat for the burrowing skink (Ophioscincus truncates);

e Protection of soil from erosion by the establishment of native vegetation cover over the
whole area;

e Enhance opportunities for natural regeneration of flora species: and

e The establishment and restoration of vegetation that displays active signs of progressing
toward the defined vegetation communities (for each zone).

 

Chenoweth EPLA 078103_Rehab_12_12_07.doc Dec ‘07