环境因子对湖泊沉积物碱性磷酸酶活性的影响

文章对云龙湖和骆马湖2种不同类型湖泊沉积物的碱性磷酸酶进行了测定,分析了水体理化特性、季节变化及水生植物对湖泊沉积物碱性磷酸酶活性的影响,结果表明:pH值、温度对沉积物碱性磷酸酶活性影响较大,呈显著正相关(r=0.220,P70.05;r=0.478,P70.01),而DO值的影响较小,相关不显著;随着季节的变化,云龙湖沉积物碱性磷酸酶活性变化较明显,其变化规律为夏季>秋季>冬季>春季,夏季最高,为330.27 mg/(kg·h),春季最低,为154.65 mg/(kg·h);随着季节的变化,水体pH、DO变化较小,分别为8.12～8.50、6.84～8.47 mg/L,温度变化较大,为3.3～26.5℃;水生植物对骆马湖沉积物碱性磷酸酶活性影响较大,有草区均大于无草区且有草区碱性磷酸酶活性随季节变化显著。因此,水体理化特性、季节变化及水生植物等环境因子对不同湖泊沉积物中碱性磷酸酶活性有重要影响。

Impact of Environmental Factors on Alkaline Phosphatase Activity of Sediment in Lakes

Alkaline phosphatase activity(APA) of sediment in Yunlong Lake and Luoma Lake was determined,and effects of physical and chemical characteristics of water,seasonal dynamics and aquatic plants on APA of different lakes were analyzed.Results showed that APA was significantly positive correlation with pH value(r=0.220,P<0.05) and temperature (r=0.478,P<0.01) respectively,but DO had little effect on APA.Seasonal change of APA in Yunlong Lake was obvious,with the highest APA of 330.27 mg/(kg·Μh) in summer and the lowest of 154.65 mg/(kg·h) in spring.pH value varied from 8.12 to 8.50, temperature varied from 3.3℃to 26.5℃,DO varied from 6.84 mg/L to 8.47 mg/L.Aquatic plants had great effect on APA of Luoma Lake,APA of grass area was greater than that of no grass area,and seasonal change of APA was obvious in grass area. In brief,physical and chemical characteristics of water,seasonal dynamics and aquatic plants have great effect on APA.