Abstract: Acute toxicity and life-table experiments were conducted to study the acute toxicity of dibutyl phthalate (DBP) and its effects on the life table demographic parameters of freshwater cladoceran Monia macrocopa. The 48 h LC50 of M. macrocopa for DBP was 968 mg·L-1. DBP at 005〖KG-*2〗-〖KG-*7〗5000 μg·L-1 did not significantly affect the life expectancy at birth and the gross and net reproductive rates, but significantly affected the generation time and intrinsic rate of population increase of M. macrocopa (P<005). Comparing with the control, DBP at 5000 μg·L-1 significantly decreased the generation time, but increased the intrinsic rate of population increase.

Key words: Alkali-stress, Salt-stress, Buffer capacity, pH, Aneurolepidium chinense, Helianthus annuus