石油烃对孔石莼生长及光合作用的影响

研究了3种石油烃（船舶燃油（L.D.O.）、沙特阿拉伯轻质原油（沙轻原油）和船用润滑油（润滑油））溶液对孔石莼Ulva pertusa的生长和光合作用的影响。L.D.O.和沙轻原油石油烃的浓度分别设置为0、5、10、15、25、50 mg/L,润滑油石油烃浓度分别设置为0、5、10、20、25、50、100 mg/L。结果表明：孔石莼在3种石油烃较低的浓度下均可存活,但当石油烃浓度升高到一定量时（L.D.O.=50 mg/L;沙轻原油=50 mg/L;润滑油=100 mg/L）,96 h内全部死亡;在3种石油烃不同浓度的溶液中,孔石莼的叶绿素含量、光合速率及呼吸速率总体趋势是随着石油烃浓度的升高而降低,叶绿素含量及光合速率的变化基本呈波浪式,但在润滑油石油烃各浓度溶液中,孔石莼的光合速率则随着油浓度的升高呈现逐渐下降的趋势。

Effects of petroleum hydrocarbon on growth and photosynthesis in sea weed macroalga Ulva pertusa

Effects of three petroleum hydrocarbon solutions（marine fuel L.D.O.,Saudi Arabian light crude oil and marine lubricating oil） at growth and photosynthesis in sea weed Ulva pertusa were studied to provide basic data for oil spill monitoring and risk assessment.The concentration of L.D.O.and Saudi Arabian light crude oil petroleum hydrocarbon was 0,5,10,15,25,and 50 mg/L and of marine lubricating petroleum hydrocarbon was 0,5,10,20,25,50,and 100 mg/L.The result showed that the sea weed was found to survive in three oil solutions under low concentration,but high oil concentration（L.D.O.= 50 mg/L;Saudi Arabian light crude oil =50 mg/L;marine lubricating oil =100 mg/L） to be dead totally within 96 h.The Chlorophyll contents,photosynthetic rate and respiratory rate were decreased in the sea weed exposed to the elevated concentrations of three petroleum hydrocarbon solutions,and the Chlorophyll contents and photosynthetic rate of the sea weed was shown the tendency of undulate.However,the photosynthetic rate was decreased in the sea weed in marine lubricating oil petroleum hydrocarbon solutions with increasing oil concentration.