3. Results


3.1 Sampling sites
Nine sample sites were chosen for this investigation. However, streams Jb and Jc were not sampled because they were not easily accessible.
Fig 3: Location of sampling sites.

3.2 Physiochemical and Bio-indicator Data
The nine sites varied quite widely in some of their water quality parameters such as Dissolved Oxygen, pH, Turbidity, conductivity, and Total Dissolved Solids, whilst others such as temperature and Salinity showed minimal variation between sites. For the Odonates sampled, stream Hd and Open Fields showed a significant difference from the other sites. I was unable to find any odonates in
Stream Ha. (Table 2).
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Location
Stream Ha
Stream Hb
Stream Hc
Stream Hd
Stream He
Stream Ja
Bridge 2 (Br)
Bridge (Br2)
Fields (OF)
Latitude
N01°21’13.5”
N01°21’18.4”
N01°21’27.1”
N01°21’19.7”
N01°21’23.9”
N01°21’19.2”
N01°21’10.4”
N01°21’00.6”
N01°20’57.0”
Longitude
E103°48’29.2”
E103°48’27.5”
E103°48’21.8”
E103°48’17.1”
E103°48’10.6”
E103°47’57.1”
E103°48’23.1”
E103°48’25.7”
E103°48’30.6”
Habitat
Shaded stream
Open stream
Shaded stream
Open fields
Shaded stream
Shaded stream
Shaded stream
Shaded stream
Open fields
Predators
Fishes found
Fishes found
Fishes found

Fishes found
Fishes found
Fishes found
Fishes found

Date
02/04/2011
02/04/2011
02/04/2011
10/4/2011
22/4/2011
02/04/2011
02/04/2011
22/4/2011
22/4/2011
Time
17:55:56
16:42:44
15:45:46
12:56:38
12:32:50
14:10:51
18:36:59
14:58:09
14:58:09
DO* ( % )
69.6
90.4
87.5
69.0
56.5
86.1
82.4
75.8
75.8
DO (mg/L)
5.72
7.35
7.13
5.61
4.58
7.01
6.70
5.71
5.71
DO Temp(deg C)
25.7
25.8
25.7
26.1
26.0
27.0
25.8
26.8
26.8
Temp (deg C)
25.58
25.70
25.62
25.93
25.36
26.94
25.64
26.62
26.62
pH
6.23
5.69
5.15
5.72
5.55
6.09
6.41
6.0
6.0
Turbidity(NTU)
6.0
10.6
2.1
7.6
0.8
7.1
10.3
2.9
2.9
Cond**(microS/cm )
37
25
17
37
35
76
27
60
60
TDS*** ( g/L )
0.024
0.016
0.011
0.024
0.022
0.048
0.017
0.038
0.038
Salinity****
0.02
0.01
0.01
0.02
0.01
0.03
0.01
0.03
0.03
Damselflies




Euphaea impar

Euphaea impar




Prodasineura notostigma

Prodasineura notostigma
Prodasineura notostigma




Podolestes orientalis


Vestalis amethystina
Podolestes orientalis
Vetalis amethystinna
Vetalis amethystinna

Dragonflies

Tyriobapta torrida
Tyriobapta torrida
Neurothemis fluctuans

Tyriobapta torrida

Tyriobapta torrida
Orchithemis pulcherrima



Rhyothemis Phyllis








Crocothemis servilia








Ictinogomphus decoratus melaenops





  *DO: Dissolved Oxygen; **Cond: Conductivity; ***TDS: Total Dissolved Solids; ****Salinity: is expressed as a ratio of salinity to KCI of 35 g/L.
Table 2: Data collected from 9 sites in Upper MacRitchie Catchment Area

Fig 4: Matrix of the Odonates found within the Upper MacRitchie Basin during the study period. 

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