Biological indicators for monitoring water pollution
2000
Hafeez, R. (Pattan Development Organization, Islamabad (Pakistan)) | Khan, L. | Inayatullah, C.
The study was conducted at Hattar industrial area, about 69 km north of Islamabad, to determine the impact of industrial effluent on the population dynamics of aquatic insects. The water quality of Khanpur canal before industrialization of area confirmed the set National Environmental Quality Standards (NEQS). The water quality, since then, has deteriorated in terms of its pH, Biological Oxygen Demand, Chemical Oxygen Demand, chloride, nitrate and Total suspended solids were manifold higher than NEQS. The deterioration of water quality has a direct impact on the population of species of aquatic insects. The species which were undetectable included Diplacoides, Rhyothemis, Tramea, (Anisoptera); Ischnura sp. (Zygoptera); Sialis (Megaloptera); Ambrysus (Hemiptera); Thalassotrechus, Macrovatellus, Celina, Dineutus, Narpus, Heterelmis, Amphizoa (Coleoptera); Blepharicera, Bibiocephala, Philorus, Gymnopais, Parasimulium, Prosimulium, Cnephia, Pentaneura flavifrons (Joh.), Pelopia, Anatopynia (Diptera); Bourletiella, Isotomurus (Collembola). This study supports the hypothesis that the aquatic species of insects can be used as tools or indicator to monitor the health of ecosystem.
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