Appendix D - Riparian Rehabilitation Plan

 

 

5) WEED MANAGEMENT

5.1 Assisted Natural Regeneration

A very low density of environmental weeds occurs within the Rehabilitation Area.
Assisted Natural Regeneration is anticipated to be the predominant management
activity as the principles apply:

e To natural areas where the native plant community is largely healthy and
functioning

e When native plant seed is still stored in the soil or will be able to reach the site
from nearby natural areas, by birds or other animals, wind, or water

e Where the natural regeneration processes (seedling germination, root
suckering, etc.) are being inhibited by external factors, such as weed invasion,
soil compaction, cattle grazing, mechanical slashing, etc.

e = When limited human intervention, such as weed control, minor amelioration
of soil conditions, erection of fencing, cessation of slashing, etc. will be enough
to trigger the recovery processes through natural regeneration

e When the main management issue is weed infestation and/or current land use
practices

The re-establishing plant community will be substantially similar in structure,
composition and diversity to the original vegetation type (based on the Regional
Ecosystem Pre-Clearing mapping). It is expected the general management techniques
are to follow the principles of:

. Identifying nodes of resilience

. Working to strengthen identified nodes and protect and encourage all existing and
naturally regenerating species through assisted natural regeneration processes

. Working outwards from nodes of resilience to increase the size of nodes and
gradually connect to other nodes of resilience.

All assisted natural regeneration works are to be undertaken by appropriately
experienced and qualified people utilising techniques as presented within Section 5
of the SEQ Ecological Restoration Framework Manual (Chenowith LPA, 2012).

5.2 Weed Species to be Controlled

Assisted natural regeneration will be applied throughout the in-tact areas within the

Rehabilitation Area which contain good in-situ ecological resilience and do not require

revegetation planting to restore natural biodiversity. The primary management

activities will be the selective targeted control of environmental weed species.

Weed management is to include the management of all environmental weeds from

the Rehabilitation Area including (but not limited to) those listed in Table 1, as well as

any additional weeds listed in the following documents:

Restricted Matters (Invasive Plants) listed under the QLD Biosecurity Act 2014

e Weeds of National Significance (WONS) under the Commonwealth Government
Weeds strategy

e Invasive Naturalised Plants in Southeast Queensland, 2002, Queensland
Herbarium

¢ Noosa Biosecurity Plan 2020

e Any other exotic plants known to exhibit weed characteristics (i.e., Invasive,
competitive characteristics)

5.3 General Methods

All works are to be conducted in line with the SEQ Ecological Restoration Framework.
All weed treatments to comply with, Minor Use Permit PER11463 & 82307, product
labels and individual SDS, and other applicable permits as well as the Chemical Usage
(Agricultural and Veterinary) Control Act 1988, Agricultural Chemical Distribution and
Control Act 1966, and the Work Health and Safety Act 2011 (including all applicable
Regulations).

All weed management works are to be conducted by experienced persons proficient
in both native species and weed species identification. The method adopted for
removal of weeds from the site will be dependent upon the physical stage of
development of individual weed specimens. Only herbicides registered for aquatic
use as detailed on the manufacturer’s specifications are to be applied. Herbicide
sprays should be applied in non-windy conditions in order to prevent incidental
poisoning of native species and not on days preceding forecast rainfall. Those
responsible for managing weeds need to consider the sensitivity of frog larvae and
other aquatic fauna to herbicides and wetting agents before use.

5.4 Weed Control Area Identification

Weed control is to be undertaken within the entirety of the existing vegetated
riparian corridor within the site as well as within defined revegetation areas to assist
in growth of planted tubestock.

5.5 Maintenance Schedule

An initial primary weed control event is to occur in which woody weeds are to be
poisoned in-situ (drilled/frilled and poisoned) and all other visible weeds (excluding
exotic grasses) are treated. Exotic grasses are not to be poisoned. It is anticipated that
grass species will be outcompeted and shaded out once native species regenerate.

Follow up maintenance is to be enacted for a period of one year. The frequency of
the maintenance schedule is to be one maintenance event six months after primary
weed control is complete, with a final follow up weed control event at the end of the
twelve-month maintenance period (i.e., a total of two weed maintenance events
following primary weed control).

5.6 Weed Coverage

A list of weed taxa observed within the Rehabilitation Area prior to works commencing
is detailed in Table 4. This list is indicative only. Overall weed management is to be
guided by the specifications as detailed in Section 5.2.

TABLE 4— WEED SPECIES LIST

     

 

Comm
Ardisia crispa coral berry |
Cinnamomum camphora camphor laurel R

 

Desmodium uncinatum silver leaved Desmodium |

 

Lantana camara lantana

 

Ligustrum sinense small-leaved privet

 

Megathyrsus maximus green panic I

 

Murraya paniculata mock orange I

 

Paspalum mandiocanum broad-leaved paspalum I

 

Passiflora edulis passionfruit |

 

Passiflora subpeltata white passionfruit |

 

 

Solanum mauritianum wild tobacco |

 

 

 

 

 

 

RIPARIAN REHABILITATION PLAN
157 LAWNVILLE ROAD,
BLACK MOUNTAIN

 

 

 

Sphagneticola trilobata Singapore daisy R
Syagrus romanzoffiana Cocos palm I
Tradescantia fluminensis Trad I

 

 

 

 

 

 

| = Invasive species
R = Restricted Invasive Plant under the Queensland Biosecurity Act 2014

6) PERFORMANCE CRITERIA

The progress of the rehabilitation is to be qualitatively assessed against Key
Performance Indicators (KPI) that have been developed to determine completion
of the rehabilitation works (refer to Table 5). KPls represent a benchmark of
expected progress of rehabilitation works within the 12 month management
period. These KPI must be met for the works to be considered complete and
granted off-maintenance. At the end of the twelve month maintenance period, a
monitoring report must be prepared by a suitably qualified person and submitted
to Council demonstrating that the KPI have been met.

TABLE 5 — KEY PERFORMANCE INDICATORS

 

ASSISTED NATURAL REGENERATION AREA

Native Evidence of native recruitment throughout majority of
Regeneration Rehabilitation Area.

 

 

 

Weed <5% weed cover (low threat environmental weeds) in any
Cover 5m x 5m plot (excluding exotic grass species)
0% woody weeds (>1m high) or Restricted Invasive Plant
species regulated under Biosecurity Act 2014
REVEGETATION AREAS

 

 

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Desired height of Average of height >1m
trees and shrubs

 

One tree/shrub per 4m? (i.e., planted at 2m centres)
An outer row of Lomandra Hystrix

Plant density

 

175 Trees
175 Shrubs

180 Lomandra

Plant numbers

 

All failed plants to be replaced to meet the Plant Density KPI
of 100%

Plant mortality

 

Minimum plant 5 species of trees
diversity 4 species of shrubs