Wetland Project Data Summary

Student Initials:

Student Number:

Demonstrator Group : A (Wednesday)

LOCATION DETAILS

Name of waterbody

Booragoon lake

Longitude

90.4E

Latitude

53.8N

Date of sampling

10/3/04

Season

Autumn

Weather at time of sampling

Fine and sunny; 29°C with sparse cirrus cloud and a breeze; no rain was recorded in the past 24 hours

Classification & water regime

Comments

Category of wetland (Undisturbed, created, urban, agricultural, coloured, saline, acidic, etc)

Semi- disturbed, natural urban wetland

Semeniuk Vegetation Classification

zoniform

Water regime (permanent, seasonal, episodic)

Permanent

Water level varies with season but is present all year round with the rare exceptions of anomalies

Mean depth of sampling sites (X ± SE) (n)

9.5 ± 7.1

One site had no water, which dragged the average down considerably (4 sites)

Estimated maximum depth of wetland

30cm

This summer was an anomalous year and water level is extra low; also much deeper in winter

Soil association

Bassendean Dunes

Sediment types

Mud and silt

Probably detritus also

Water Quality

Temperature °C

28.5

Ranged from 16.2 to 35.2 (19°C difference)

pH (X ± SE) (n)

8.65 ± 0.11

(4 sites)

conductivity (µS/cm) (X ± SE) (n)

5210 ± 250

(4 sites)

gilvin (g440/m) (X ± SE) (n)

77.99 ± 14.50

Range: 44.22 - 164.43 (4 sites)

turbidity (NTU) (X ± SE) (n)

225 ± 23.1

(4 sites)

Secchi disc (m) (n)

0.074 ± 0.007

(4 sites)

P0₄ (µg/l) (n)

4750 ± 845

(4 sites)

NH₄ (µg/l) (n)

2290 ± 127.5

(4 sites)

N0₃ (µg/l) (n)

1100 ± 273.3

(3 sites)

chlorophyll a (µg/l) (n)

400 ± 84

(3 sites)

Aquatic Plants

Total no. of species

8

Total no. of macrophyte species

0

Total no. of algal species

8

Names of most abundant macrophyte taxa

Names of most abundant algal taxa

Chlamydomonas, Microcystis

Total per cent cover

95%

Percent of wetland area covered

95%

Exotic index

0

Health (excellent/average/poor)

Poor

Would not normally be so bad (probably average)

Fringing Vegetation

No. of plant communities

1

Percent of wetland area covered

67

Averaged of estimated data

Dominant community 1:

Percent of wetland area covered
Total number of species

60
16

Names of most abundant taxa

Maleleuca raphiophylla
Cassytha glabella
Paspalum distichum

Structure index
Total % cover (up to 300%)

2
118

Exotic index
Health (excellent/average/poor)

62
Poor/average

Data sets range from 0 - 100%

Dominant community 2:

Percent of wetland area covered

Total number of species

Names of most abundant taxa

Structure index

Total % cover (up to 300%)

Exotic index

Health (excellent/average/poor)

Terrestrial Vegetation

No. of plant communities

2

Percent of wetland perimeter covered

75%

Dominant community

Percent of wetland perimeter covered

70

Total number of species

18

Names of most abundant taxa

Eucalyptus calophylla Eucalyptus marginata
Melaleuca. raphiophylla
Persicara decipiens

Structure index
Total % cover (up to 300%)

2
240%

Seems very high for an urban wetland!

Exotic index
Health (excellent/average/poor)

53.5%
average

Gr AA had high exotic index and "excellent" health. Am I missing something or are they?

Aquatic Invertebrates

Mean no. of taxa (X ± SE) (n)

2.5 ± 0.7

(2 sites) one group did not complete this section and another had no water to analyse

Names of most abundant taxa

Corixidae
Chironomidae
Hemiptera

Mean no. of predatory E) (n)

2

(data for one site only)

Indicator species present

Chironomidae
Corixidae

Dominance of Insecta vs Crustacea

Insecta

State

(clear, macrophyte-dominated/ turbid , phytoplankton dominated/clear, benthic mat dominated)

turbid
phytoplankton dominated

Human Impacts

Disturbance (high/med/low):in water

med

Disturbance (high/med/low):in fringing vegetation

med

Some litter, drains, cleared for roadways, boardwalk, high exotic species index

Number of drains

4