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硬毛藻生长对水体和沉积物中碱性磷酸酶活性及磷含量的影响

邵雪琳 孟祥森 高 丽 魏 权

邵雪琳, 孟祥森, 高 丽, 魏 权. 硬毛藻生长对水体和沉积物中碱性磷酸酶活性及磷含量的影响[J]. 环境科学研究, 2015, 28(6): 890-898.
引用本文: 邵雪琳, 孟祥森, 高 丽, 魏 权. 硬毛藻生长对水体和沉积物中碱性磷酸酶活性及磷含量的影响[J]. 环境科学研究, 2015, 28(6): 890-898.
SHAO Xuelin, MENG Xiangsen, GAO Li, WEI Quan. Effects of Chaetomorpha Growth on Alkaline Phosphatase Activity and Phosphorus Concentrations in Water and Sediments[J]. Research of Environmental Sciences, 2015, 28(6): 890-898.
Citation: SHAO Xuelin, MENG Xiangsen, GAO Li, WEI Quan. Effects of Chaetomorpha Growth on Alkaline Phosphatase Activity and Phosphorus Concentrations in Water and Sediments[J]. Research of Environmental Sciences, 2015, 28(6): 890-898.

硬毛藻生长对水体和沉积物中碱性磷酸酶活性及磷含量的影响

基金项目: 国家自然科学基金项目(41273130,40801084);烟台大学研究生科技创新基金项目(YJSZ201514)

Effects of Chaetomorpha Growth on Alkaline Phosphatase Activity and Phosphorus Concentrations in Water and Sediments

  • 摘要: 为研究水体与沉积物中APA(碱性磷酸酶活性)与磷含量的相互关系,于山东省荣成天鹅湖藻类暴发区采集丝状硬毛藻和表层沉积物,进行室内模拟试验,分析了藻类生长过程中水体和沉积物中APA、磷含量、藻体生物量及磷富集量的动态变化. 结果表明:①试验初期(0~3 d),水体中ρ(TP)较高,无沉积物组各处理水体总APA变化不大,有沉积物组有所下降. 1周后,除ρ(TP)为2.00 mg/L处理外,其余处理水体ρ(SRP)(SRP为可溶性磷)降至较低水平(0~0.06 mg/L);水体总APA增加,其中无沉积物组低磷(0~0.20 mg/L)处理下APA变幅为6.02~18.32 μmol/(L·h),远高于相同初始ρ(TP)的有沉积物处理. ②与初始值相比,试验结束时低磷处理沉积物中各形态磷含量下降,APA升高. ③不同初始ρ(TP)条件下,藻体生物量相差很大,试验结束时藻体磷富集量与初始ρ(TP)呈显著正相关(P<0.05). 研究显示,硬毛藻生长可大量吸收水体中的磷,从而诱导水体中总APA增加,试验中期(4~12 d)低磷处理中AP(碱性磷酸酶)以颗粒态为主,而高磷(0.50~2.00 mg/L)处理中溶解态APA较高;另一方面,藻类生长使沉积物中APA升高,并加大了水-土界面磷的浓度梯度,从而可促进沉积物中可还原态磷和铁锰结合态磷向上覆水体释放.

     

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