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Norma‐Rashid, Y.; Mohd-Sofian, A.; Zakaria-Ismail, Mohd

doi:10.1023/a:1012562611307

Cited by 14 publications

(1 citation statement)

References 6 publications

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“…In station 3, 20 taxa were identified from 2,086 individuals sampled there. Varied number of taxa and individuals recorded in the three stations were at least partly attributed to the variations in river characteristics and pollution loads encountered in each station (Hawking, New, 1999;Norma-Rashid et al, 2001). On the basis of the Kruskal-Wallis test, there was a significant difference in the total abundance of dragonflies community at all sampling stations (χ 2 = 31.594, df = 2, p < 0.05).…”

Section: Resultsmentioning

confidence: 99%

Effect of Environmental Disturbances on Odonata Assemblages along a Tropical Polluted River

Abdul

Rawi

Ahmad

et al. 2017

Ekológia (Bratislava)

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Abdul N.H., Rawi Che S.Md., Ahmad A.H., Al-Shami S.A.: Effect of environmental disturbances on Odonata assemblages along a tropical polluted river. Ekológia (Bratislava), Vol. 36, No. 4, p. 388-402, 2017. Odonata larvae have been intensively used as bioindicators for freshwater pollution as their community structure closely follow changes in the environment and habitat settings. In this study, 28 taxa of Odonata larvae were collected from three stations (upper, middle and lower) of a polluted river in Malaysia. The upper river basin receives effluents from an oil palm plantation. However, the middle station is presumably contaminated with anthropogenic wastes. The lower station is found to receive polluted discharges from aquaculture outlet. Several environmental parameters of water and sediment were continuously measured during the study. The water parameters showed no significant differences amongst the three stations. The species richness of Odonata was 22, 24 and 20 in the upper, middle and lower stations, respectively. The abundance of Odonata was significantly different among the studied sites. The tolerant damselfly, Pseudagrion sp. (41.22%), and facultative dragonflies, Onychothemis sp. (17.12%), were the most dominant taxa along the river stations. Onychothemis sp. and Paragomphus capricornis were equally important at the upper station [Important Species Index (ISI) 25.3 and 24.2%, respectively]. Pseudagrion sp. only scored an ISI value of 9.7%. Pseudagrion sp., P. capricornis and Onychothemis sp. were dominant in the middle station (ISI: 41.2%, 25.9% and 10.9% respectively), and Pseudagrion sp., Onychothemis sp. and Prodasineura sp. dominated the areas with dense growth of submerged aquatic weeds Hydrilla sp. in the lower station (ISI: 47.9, 24.5 and 13.8%, respectively). On the basis of the variations in larval abundance and ISI values, microhabitats differences partly in response to different types of pollutions entering the water structured the Odonata communities in this river basin.

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Section: Resultsmentioning

confidence: 99%