|
Parameter/study
|
McComb et al., 1995
|
Siemon et al., 1993
|
Woodcock, 1992
|
Trudgen, 1991
|
Kinnaird et al., 1979
|
|
Time of data acquisition
|
1957- 1994 at 10 year intervals |
3- 4 January 1992 |
not stated, probably around 1991 |
not stated, probably around 1990 |
unknown |
|
Type of data
|
scanned B&W and colour aerial photography |
colour aerial photography, scale 1:20 000 |
not stated, probably aerial photographs |
colour aerial photography, scale 1:25 000 |
unknown |
|
Method
|
visual photointerpretation, on- screen digitizing |
visual photointerpretation, overlays digitized |
not stated, probably visual interpretation |
visual photointerpretation |
not stated
|
|
Format of the final map
|
digital |
digital polygons, hand drawn vegetation symbols |
black and white analog |
colour analog |
analog, possibly computer methods were used in generating the map |
|
Scale
|
1: 25000 |
approx. 1:15 000 |
1:2000 |
1:25000 |
not stated, approx. 1: 50000 ? |
|
Smallest area mapped (resolution)
|
2m by 2m |
not stated, but from the map approx. 15 by 15 m |
not stated, but from the map approx. 10 by 10m |
not stated, but from the map approx. 10 by 10m |
not stated, from the map approx. 30 by 30m |
|
Purpose for mapping
|
historical changes in saltmarsh flats |
baseline information on the vegetation fringing Serpentine River |
amongst others: “to map vegetation showing the location of trees (approx.
light and dominant species), density of cover, main understorey species,
presence of rush beds and weed species |
list as much flora as possible, assess significance, document populations
of rare and geographically restricted species |
not stated the title of the map is: “Peel Inlet Management Authority
Vegetation Plan”. |
|
Coverage (approx.% of current study area)
|
90% |
5% |
20% |
15% |
100% |
|
Major vegetation associations/units
|
saltmarsh only |
saltmarsh, estuarine fringing forest, fringing vegetation, sandy rise
vegetation, freshwater fringing vegetation and disturbance related plant
assemblages. |
down to dominant species level, also uses Semeniuk (1990) geomorphological
classification: Beach Ridge Complex, Elongate Fluvial Delta Complex, Erosional
Sandy Shore, Spit- Lagoon Complex, Tidal Shoal |
the strand, Q4 and Q3 Age Quindalup dunes, Peppermint Units,
Tuart Units, Spearwood dunes, Limestone areas, Intergrades, Limestone to
Spearwood dunes, Yoongarillup Plain - Seasonally Damp to Wetland Areas,
Q2 and Q1 Age Quindalup Dunes |
Tuart woodland, saline wetland complex, Marri- Jarrah woodland,
floodgum woodland, closed scrub, Melaleuca preissiana open woodland, samphire
herblands and sedge, swamp paperbark low woodland |
|
Final accuracy, general comments
|
80% |
not stated, final map should have had a scale smaller than the aerial
photography used for the study |
not stated |
not stated |
not stated |
|
Detailed species list and/or description
|
only for transects within saltmarsh |
included |
included |
included |
not stated |
|
Summary/ recommendations
|
decline of saltmarsh in quantity and quality |
severe erosion of river banks caused by livestock. Sparsity of understorey.
Many plant communities are of regional importance. Severe weed invasion.
The majority of native vegetation of the Serpentine River catchment has
been lost |
variety, related to the management of weeds, fire etc. |
very detailed map down to dominant species. “No balance been struck
between conservation and exploitation”. Vegetation of very high conservation
value |
not stated |