| Autor: |
Kumar, Sunil, Nagar, Swati, Chowdhary, Naveed |
| Předmět: |
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| Zdroj: |
International Journal of Pharmacology & Biological Sciences; Dec2015, Vol. 9 Issue 3, p1-7, 7p |
| Abstrakt: |
Increase in ultraviolet radiation (UVR) due to stratospheric ozone depletion on the earth surface poses threat to plants and animals. Zooplankton live near water surfaces thus increases their chances of exposure to UVR. Many negative effects of UVR have been reported on zooplankton communities. In this study, effect of solar and artificial UV-B with temperature was studied on the cladocera and copepod thus indicating their sensitivity towards UVR. Daphnia from Cladocera and Cyclops from Copepoda were taken as test organisms. Exposure of solar and UV radiations was given two hours each for 15 days. The experiment was conducted at high and low temperature to record the effect of temperature on UV response of Daphnia and Cyclops. Daphnia showed higher mortality (22.97%) at high temperature than Cyclops (16.99%). At low temperature, Daphnia and Cyclops showed low mortality i.e. 18.84% and 14.67% respectively. The results indicated that temperature increases the phototoxic effect of ultraviolet radiation on Daphnia and Cyclops. Daphnia showed more photosensitivity towards UVR at high temperature than Cyclops. Intensity dependent increase in mortality of Daphnia and Cyclops was observed. Enhancement of UV-B radiation due to ozone depletion and increase in temperature due to climate change may lead to significant change in zooplankton communities, aquatic biodiversity and ecosystem productivity. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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