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Indices
Legend
The charts show the distribution of the site scores for the catchment in a box and whisker
plot. The image to the right shows the meaning of the different elements in the chart.
The number behind the charts is the number of sites with valid data. It can be less
than the total number of sites in the catchment if some data could not be collected.
A description of the indicators and methods used can be downloaded as a PDF file.
Summary
Six sites were assessed in the Lower Brisbane reporting area, which was awarded a 2009 Report Card grade of ‘F’, the
same as its 2008 grade of ‘F’. Streams generally failed to meet Ecosystem Health Guidelines; particularly in terms of
the Nutrient Cycling, Aquatic Macroinvertebrate and Fish indicators.
The three highest scoring indices for the Lower Brisbane reporting area during 2008‑09 were pH (Annual Reporting Area
Index Score = 0.98), R24 (0.97) and Temperature (0.90). The three lowest scoring indices for the area were
δ15N (0.22), PET (0.29) and Proportion Alien (0.49).
The assessment site yielding the highest annual score (indicating the best ecological condition) during 2008‑09 was one
on Enoggera Creek (site 143‑0054) with an excellent score of 0.91. The assessment site yielding the lowest annual score
(indicating the worst ecological condition) during 2008‑09 was one on Norman Creek (site 143‑0056) with a very poor
score of 0.46. This site is located amongst urban development about 5km from Brisbane’s central business district.
Abbreviations glossary
Site scores
| Spring Site Indicator Scores |
| Site Code |
Physical and Chemical |
Nutrient Cycling |
Ecosystem Processes |
Aquatic Macroinvertebrates |
Fish |
| 142-0009 |
0.81 |
0.00 |
1.00 |
0.62 |
0.76 |
| 142-0010 |
0.94 |
0.42 |
0.32 |
0.60 |
0.56 |
| 143-0054 |
0.99 |
1.00 |
0.99 |
0.67 |
0.94 |
| 143-0056 |
0.51 |
0.12 |
1.00 |
0.27 |
0.46 |
| 143-0057 |
0.92 |
- |
1.00 |
0.39 |
0.76 |
| 143-0058 |
0.78 |
0.46 |
0.74 |
0.60 |
0.29 |
| 143-0059 |
0.96 |
0.14 |
0.97 |
0.42 |
0.61 |
| 143-0062 |
0.98 |
1.00 |
0.97 |
0.61 |
0.32 |
| Autumn Site Indicator Scores |
| Site Code |
Physical and Chemical |
Nutrient Cycling |
Ecosystem Processes |
Aquatic Macroinvertebrates |
Fish |
| 142-0009 |
0.96 |
0.00 |
0.87 |
0.85 |
0.71 |
| 142-0010 |
0.95 |
0.12 |
0.91 |
0.35 |
0.43 |
| 143-0054 |
0.99 |
- |
1.00 |
0.55 |
0.96 |
| 143-0056 |
0.95 |
0.00 |
0.56 |
0.43 |
0.33 |
| 143-0057 |
0.98 |
0.00 |
0.84 |
0.58 |
0.71 |
| 143-0058 |
0.98 |
- |
- |
0.56 |
0.30 |
| 143-0059 |
1.00 |
- |
1.00 |
0.91 |
0.58 |
| 143-0062 |
0.91 |
0.37 |
0.17 |
0.46 |
0.25 |
| Annual Site Indicator Scores |
| Site Code |
Physical and Chemical |
Nutrient Cycling |
Ecosystem Processes |
Aquatic Macroinvertebrates |
Fish |
| 142-0009 |
0.89 |
0.00 |
0.93 |
0.73 |
0.73 |
| 142-0010 |
0.94 |
0.27 |
0.62 |
0.48 |
0.49 |
| 143-0054 |
0.99 |
1.00 |
0.99 |
0.61 |
0.95 |
| 143-0056 |
0.73 |
0.06 |
0.78 |
0.35 |
0.39 |
| 143-0057 |
0.95 |
0.00 |
0.92 |
0.48 |
0.74 |
| 143-0058 |
0.88 |
0.46 |
0.74 |
0.58 |
0.30 |
| 143-0059 |
0.98 |
0.14 |
0.98 |
0.67 |
0.60 |
| 143-0062 |
0.94 |
0.68 |
0.57 |
0.54 |
0.29 |
The scores range from 0.0 (worst) to 1.0 (best). A dash ('-') indicates that sufficient data
was not available.
Flowchart for calculation of summary statistics based on site scores
Map
| Site Code |
Waterway |
|
Site Name |
| 142-0009 |
Kedron Brook |
|
Grinstead Park, Royal Parade, Enoggera |
| 142-0010 |
Cabbage Tree Creek |
|
Phillip Vaughan Park, Nemira Street, Carseldine |
| 143-0054 |
Enoggera Creek |
|
Central Road, Brisbane Forest Park |
| 143-0056 |
Norman Creek |
|
Ekibin Park South, Arnwood Place, Annerley |
| 143-0057 |
Bulimba Creek |
|
Boorabbin Picnic Ground, Stackpole Street, Wishart |
| 143-0058 |
Bullockhead Creek |
|
Progress Road, Wacol |
Facts
- Total area: 937km2
- Stream network length: 1,953km
- Local Councils: Brisbane City Council, Logan City Council, Scenic Rim Council
- Dominant land uses: urban, native bush, grazing, rural residential
- Highly modified, urbanised catchment
- Some grazing lands and natural bush/forested areas remain in the upper parts of the catchment
- Riparian vegetation has been cleared from most waterways
- Large volume of stormwater runoff into the waterways during/after storm events
- Population growth is a major pressure on the catchment
Fish
Fish species identified in Lower Brisbane streams
| Species |
Common name |
| Ambassis agassizii |
Olive perchlet |
| Anguilla australis |
Short-finned eel |
| Anguilla reinhardtii |
Long-finned eel |
| Carassius auratus |
Goldfish [A] |
| Craterocephalus stercusmuscarum |
Fly-specked hardyhead |
| Cyprinus carpio |
Common carp [A] |
| Gambusia holbrooki |
Gambusia [A] |
| Gobiomorphus australis |
Striped gudgeon |
| Hypseleotris compressa |
Empire gudgeon |
| Hypseleotris galii |
Fire-tail gudgeon |
| Hypseleotris klunzingeri |
Western carp gudgeon |
| Leiopotherapon unicolor |
Spangled perch |
| Melanotaenia duboulayi |
Duboulay's rainbowfish |
| Mogurnda adspersa |
Southern purple-spotted gudgeon |
| Mugil cephalus |
Sea mullet |
| Oreochromis mossambicus |
Mozambique mouthbrooder [A] |
| Retropinna semoni |
Australian smelt |
| Tandanus tandanus |
Eel-tailed catfish |
| Xiphophorus helleri |
Swordtail [A] |
| Xiphophorus maculatus |
Platy [A] |
| [A] | Alien species |
| [T] | Translocated species |
| [EM] | Estuarine-Marine species |
Macroinvertebrates
Aquatic macroinvertebrate taxa identified in Lower Brisbane freshwater streams
| Class |
Order |
Taxa |
| Arachnida |
s.o. Acariformes |
Acarina |
| |
Araneae |
Araneae |
| Bivalvia |
Veneroida |
Corbiculidae |
| |
|
Sphaeriidae |
| Branchiopoda |
Cladocera |
Cladocera |
| Copepoda |
– |
Copepoda |
| Gastropoda |
Basommatophora |
Ancylidae |
| |
|
Lymnaeidae |
| |
|
Physidae |
| |
|
Planorbidae |
| |
Mesogastropoda |
Hydrobiidae |
| |
|
Thiaridae |
| |
|
Viviparidae |
| s.c. Hirudinea |
– |
Glossiphoniidae |
| Insecta |
s.o. Anisoptera |
Cordulephyidae |
| |
|
Gomphidae |
| |
|
Hemicorduliidae |
| |
|
Libellulidae |
| |
|
Macromiidae |
| |
|
Pseudocorduliidae |
| |
|
Synthemistidae |
| |
Coleoptera |
Dytiscidae |
| |
|
Hydraenidae |
| |
|
Hydrophilidae |
| |
|
Scirtidae |
| |
|
Staphylinidae |
| |
Collembola |
Collembola |
| |
Diptera |
Ceratopogonidae |
| |
|
Culicidae |
| |
|
s.f. Chironominae |
| |
|
s.f. Orthocladiinae |
| |
|
s.f. Tanypodinae |
| |
|
Stratiomyidae |
| |
|
Tipulidae |
| |
Ephemeroptera |
Leptophlebiidae |
| |
Hemiptera |
Belostomatidae |
| |
|
Corixidae |
| |
|
Hebridae |
| |
|
Hydrometridae |
| |
|
Naucoridae |
| |
|
Notonectidae |
| |
|
Pleidae |
| |
|
Veliidae |
| |
Neuroptera |
Sisyridae |
| |
Trichoptera |
Calamoceratidae |
| |
|
Ecnomidae |
| |
|
Hydroptilidae |
| |
|
Leptoceridae |
| |
s.o. Zygoptera |
Coenagrionidae |
| |
|
Isostictidae |
| |
|
Megapodagrionidae |
| |
|
Protoneuridae |
| Malacostraca |
Amphipoda |
Paramelitidae |
| |
|
Talitridae |
| |
Decapoda |
Atyidae |
| |
|
Palaemonidae |
| |
|
Parastacidae |
| phy. Platyhelminthes |
cl. Temnocephalidea |
Temnocephalidea |
| s.c. Oligochaeta |
– |
Oligochaeta |
| Ostracoda |
– |
Ostracoda |
| Turbellaria |
Seriata |
Dugesiidae |
|
