The effect of salinity fluctuation in freshwater streams on the fecundity of post-diapause Chironomus dilutus.

摘要: Much scientific research dedicated to understanding the effects of freshwater salinization caused by road de-icing salts has utilized static exposures, with many tests conducted at winter or spring temperatures. While relevant for lentic ecosystems, pulsed patterns salinity occur in lotic environments, particularly summer months where precipitation can decrease elevated levels retention residual salts. The current study aimed evaluate on emergence, sex ratio, and fecundity Chironomus dilutus over two generations laboratory exposure. Three salt treatments, including a control, modeled after environmental monitoring data local streams, were used determine ecological periodic declines C. No significant observed emergence success ratios within across generations, but high treatment was reduced regardless generation (P < 2e−16), possibly due increased osmoregulatory stress salinities. intermediate decreasing salinities may account lack negative protecting sensitive life stages. More is needed long-term population viability. suggests more using similar experimental design fully influence as exposures not accurately reflect changes salinity.