| Autor: |
Wang, Jinhe, Feng, Lei, Tang, Xuexi |
| Zdroj: |
Acta Oceanologica Sinica; Mar2011, Vol. 30 Issue 2, p113-119, 7p |
| Abstrakt: |
The effect of UV-B radiation enhancement at experimental doses of 0.00, 0.24, 0.48, 0.72, 0.96, and 1.20 kJ/m on the population dynamics of the rotifer Brachionus urceus feeding on the alga Chlorella sp. was studied under controlled laboratory conditions using clonal culture and life-table techniques. The results show that UV-B radiation treatment significantly shortened the survival time of the rotifer ( P <0.05): The longest survival time (336 h) occurred in the control (0.00 kJ/m) while the shortest (222 h) occurred when exposed to the highest UV-B radiation treatment (1.20 kJ/m). The fecundity of the rotifer B. urceus was enhanced by the lower UV-B radiation treatment (0.24 and 0.48 kJ/m) but inhibited by the higher treatments (0.96 and 1.20 kJ/m). Life expectancy also was obviously affected by UV-B radiation ( P <0.05). The highest life expectancy occurred in the control (0.00 kJ/m), and it became shorter with increasing doses of UV-B radiation. The resutls in the present study indicate that the life expectancy of the rotifer B. urceus can be used as an indicator for UV-B radiation enhancement. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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