Botanical consultants
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BOTANICAL CONSULTANTS REPORT FOR THE LAKE GRACE SHIRE BY ANNE (COATES) RICK PO Box 36 NEWDEGATE WA 6355 Telephone (08) 98206048 Facsimile (08) 98206047
2008 Lake King Townsite UCL Vegetation And Flora Survey (2) Lake King UCL Vegetation and Flora survey 2
Lake King UCL Vegetation and Flora Survey 1.0 Introduction--------------------------------------------------------------- 3
Method--------------------------------------------------------------------- 3 3.0 Results--------------------------------------------------------------------- 6 3.1
Vegetation Survey---------------------------------------------- 6 3.1.1
Vegetation of the study area--------------------------- 6
3.1.2
Vegetation Condition--------------------------------- 8
3.2
Flora Survey------------------------------------------------------ 9 3.2.1
Flora of the Study Area-------------------------------- 9 3.2.2
Species of Interest-------------------------------------- 10 3.3
Survey Limitations---------------------------------------------- 15
3.4
Corrections to the 2006 survey-------------------------------- 15
Acknowledgments------------------------------------------------------ 15
References----------------------------------------------------------------- 16 Appendix 1 Site Descriptions Appendix 2 Plant Species List List of Figures Figure 1 Location of the Study Area. Figure 2 Vegetation Map of the Study Area Figure 3 Vegetation Condition Map of the Study Area Figure 4 The extent of populations of Acacia singula P3 and Melaleuca
Table 1 Muir (1977) System of Vegetation Classification Table 2 Vegetation Condition Scale Table 3 Vegetation Associations of the Study Area Table 4 The number of species and genera represented within the major families in the Study Area. Table 5
The number and location of plants of Acacia singula recorded during the 2007 survey Table 6 The number and location of plants of Melaleuca agathosmoides recorded
Lake King UCL Vegetation and Flora survey 3
Introduction
The following is a quote from the 2006 vegetation and flora survey carried out by Anne Rick for the Shire of Lake Grace.
“The study area subject to the vegetation and flora survey is Unallocated Crown Land (UCL) comprising a total area of just over 42 hectares. Prior to agreeing to release this land for residential purposes the Department for Planning and Infrastructure / Western Australian Planning Commission need a comprehensive structure plan prepared to illustrate how the land can be developed. One of the requirements with regard to preparing the structure plan is a vegetation and flora survey of the area.” (Rick 2007)
The UCL proposed to be classified ‘Residential Development’ zone in the Lake King townsite is shown in Figure 1.
Due to the dry conditions occurring at the time of the 2006 survey it was decided that further work was needed to 1.
2.
Survey for further plant species which may not have been recorded during the 2006 survey work 3.
Collect flowering or fruiting specimens to confirm previous identifications made from sterile plant material.
Further ground survey of the vegetation and flora of the study area was carried out on the 24 th September 2007. The work included further site descriptions, collection of voucher specimens and mapping the extent of the priority flora populations. The site was revisited on 23
rd October 2007 to collect species that may previously have been overlooked. Areas not intensively surveyed in 2006 were targeted. Vegetation association descriptions were based on the classification system devised by Muir (1977) which was specifically designed for describing wheatbelt vegetation (see Table 1). The condition of the vegetation described follows the Vegetation Condition Scale modified from Trudgen (1991) by B.J. Keighery for the Swan Coastal Plain Survey 1994 (Table 2).
Priority flora populations were mapped using a GPS and the use of the computer program Aussie explorer. Further site descriptions were made during traverses walked through the survey area. Specimens of plant species encountered were collected and identified using keys and by comparison with specimens at the Western Australian Herbarium. Experts involved in revising particular genera were consulted wherever possible to ensure accuracy with identification.
Lake King UCL Vegetation and Flora survey 4 Figure 1 Location of the study site. UCL proposed for rezoning as residential in the
Lake King Townsite.
Lake King UCL Vegetation and Flora survey 5
HEIGHT CLASS CANOPY COVER DENSE 70-100% d MID-DENSE 30-70% c SPARSE 10-30% i VERY SPARSE 2-10% r T Trees > 30m M Trees 15-30m LA Trees 5-15m LB Trees < 5m Dense Tall Forest Dense Forest Dense Low Forest A Dense Low Forest B Tall Forest Forest Low Forest A Low Forest B Tall Woodland Woodland Low Woodland A Low Woodland B Open Tall Woodland Open Woodland Open Low Woodland A Open Low Woodland B
Dense Tree Mallee Dense Shrub Mallee Tree Mallee Shrub Mallee Open Tree Mallee Open Shrub Mallee
Very Open Tree Mallee Very Open Shrub Mallee
Dense Thicket Dense Heath A Dense Heath B Dense Low Heath C Dense Low Heath D Thicket Heath A
Heath B Low Heath C Low Heath D Scrub
Low Scrub A Low Scrub B Dwarf Scrub C Dwarf Scrub D Open Scrub Open Low Scrub A Open Low Scrub B Open Dwarf Scrub C Open Dwarf Scrub D
Dense Mat plants Dense Hum. Grass Dense Tall Grass Dense Low Grass Dense Herbs Mat plants Mid-Dense Hum. Grass Tall Grass Low Grass Herbs Open Mat plants Hummock Grass Open Tall Grass Open Low Grass Open Herbs Very Open Mat plants Open Hummock Grass Very Open Tall Grass Very Open Low Grass Very Open Herbs
Dense Tall Sedges Dense Low Sedges Tall Sedges Low Sedges Open Tall Sedges Open Low Sedges Very Open Tall Sedges Very Open Low Sedges
Mosses, liverwort Dense Ferns Dense Mosses Ferns Mosses
Open Ferns Open Mosses Very Open Ferns Very Open Mosses
Table 2 : Vegetation Condition Scale Modified from Trudgen 1991 by B.J. Keighery for the Swan Coastal Plain Survey 1993 1 = Pristine Pristine or nearly so, no obvious signs of disturbance 2 = Excellent Vegetation structure intact, disturbance affecting individual species and weeds are non-aggressive species. For example damage to trees caused by fire, the presence of non - aggressive weeds and occasional vehicle tracks. 3 = Very Good Vegetation structure altered, obvious signs of disturbance. For example disturbance to vegetation structure caused by repeated fires, the presence of some more aggressive weeds, dieback, logging and grazing. 4 = Good Vegetation structure significantly altered by very obvious signs of multiple disturbances. Retains basic vegetation structure or ability to regenerate to it. For example disturbance to vegetation structure caused by very frequent fires, the presence of some very aggressive weeds at high density, partial clearing, dieback and grazing.
Basic vegetation structure severely impacted by disturbance. Scope for regeneration but not to a state approaching good condition without intensive management. For example disturbance to vegetation structure caused by very frequent fires, the presence of some very aggressive weeds, partial clearing, dieback and grazing.
The structure of the vegetation is no longer intact and the area is completely or almost completely without native species. These areas are often described as ‘parkland cleared’ with the flora composing weed or crop species with isolated native trees or shrubs.
Lake King UCL Vegetation and Flora survey 6
Results 3.1 Vegetation Survey 3.1.1 Vegetation of the study area The vegetation associations mapped and described in the 2006 study are outlined in Table 3. No new vegetation associations were found during the 2007 survey. Descriptions of the vegetation and flora recorded at specific sites during the 2007 survey can be found in Appendix 1. The location of these 2007 sites can be seen on the Vegetation Map (Figure 2) marked in yellow. Table 3. Vegetation Associations of the Study Area (2007 sites in red). Vegetation Association Map Unit Soils Topography Sites Comments Open Mallee over mixed Melaleuca Heath
Mm Loamy soils over clay Mostly on gentle slope. Site 12 flat terrain Site 1, Site 12, Site 23
Extensive in the northern section.
Priority 1. Eucalyptus depauperata Priority 3 Mostly Pristine condition Open Mallee over Melaleuca (broombush) Mb Stony soils. Sandy loams over clay Ridge top and gentle slope Site 3 Covers small areas only. Pristine condition. Very Open Mallee over Melaleuca (broombush) Mb
Sandy loam soils over clay Gentle slope Site 4
One small area. Pristine condition. Open Mallee over Low Scrub M Shallow loamy soils over clay Gentle slope and flat terrain Site 5, Site 8, Site 9 , Site 24, Site 26,
Extensive in the northern section. Excellent to Pristine condition. Scrub Heath SH Loamy soils with gravel over gravel sub soils. Sometimes stony Flat to very gentle slope Site 2, Site 6, Site 10, Site 11, Site 13, Site 16, Site18, Site 19, Site 25
Extensive in the southern section. Excellent to pristine condition
Thicket
T Loamy soils +/- gravel over gravel sub soils Flat to very gentle slope Site 7, Site 14, Site 17, Site20, Site 27
Small areas forming a mosaic with the Scrub/Heath. Excellent to pristine condition. Regenerating Vegetation R
Site 15, Site 11 (part)
Degraded
+/- gravel Flat
Site 21, Site 22 Small areas on edges. Degraded
L ak e K in g U C L V eg et at io n a n d F lo ra s u rv e y
7
ig u re 2 . V e g e ta ti o n M a p . U C L L a k e K in g T o w n s it e .
2
m M m S H /T m o sa ic M M m M m /M M b S H /T S H T M b 2 2 S it e 2 0 0 7
1 2 S it e 2 0 0 6
M m
V eg et at io n T yp e
S ee T ab le 2
V eg et at io n
b o u n d ar y 1 2 3 4 5 6 7 8 9 1 0 1 1 R 1 2 1 3 1 4 R 1 5 N 2 3 2 4 2 1 2 2 1 6 1 7 1 9 1 8 2 5 2 6 2 7 2 0 Lake King UCL Vegetation and Flora survey 8
Vegetation Condition The vegetation condition scale is outlined in Table 2.
Two small degraded areas adjacent to the road have been included in the 2007 survey. A number of annual herbaceous plants mostly of the family asteraceae (daisies) were found growing in these areas along with a number of weed species previously not recorded.
Map of vegetation condition. UCL Lake King Townsite.
P P P P – Some plants stressed due to dry conditions P P E E E E E G E E E
D Vegetation Condition P Pristine E Excellent G Good D Degraded D Lake King UCL Vegetation and Flora survey 9
A total of 131 plant species were recorded in the 2006 survey. An additional 35 plant species were recorded during September and October 2007. Flowering specimens collected during the 2007 survey also confirmed previous identifications made from sterile material eg Hibbertia gracilipes and Leptospermum nitens. The nomenclature follows that of the Census of Western Australian Plants (The WA Herbarium data base).
Changes to the number of species and genera listed for the major families occurring in the study area are listed in red in Table 3. The families Myrtaceae (bottlebrushes, Eucalyptus etc), Proteaceae (Grevilleas, Hakeas etc), Mimosaceae (wattles) and Papilionaceae (pea flowers) are still the most strongly represented in the flora of the study area along with the Rutaceae family (Boronia, Phebalium etc). The number of monocotyledons has now increased with 5 species of orchid (Orchidaceae) recorded. Most of the annuals collected were in disturbed sites on the western boundary.
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