Full Length Research Paper
Abstract
A decline in pH shifts the equilibrium balance of HCO3- -free CO2 towards a regime dominated by free CO2 in the water. Based on the phenomenon, the effect of different pH values on the growth of a submerged macrophyte Egeria densa was investigated in an acidified spring-fed stream in Japan. The growth rate of E. densa during its developing period was found to negatively correlate to water pH (p<0.05). This suggested that a decline of pH in the stream induced by an acidified spring promotes the growth rate of E. densa.
Key words: Submerged macrophyte, Egeria densa, acidified spring water, pH.
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