利用蚕豆根尖细胞微核技术对平顶山市河滨公园湖区水质进行监测,测定各采样点水样的蚕豆根尖细胞微核千分率(M C N‰)及污染指数(PI),并进行F检验。结果显示:所有样点水样的微核率均在21‰～25‰,与对照组相比差异极显著,所有采样点水样...利用蚕豆根尖细胞微核技术对平顶山市河滨公园湖区水质进行监测,测定各采样点水样的蚕豆根尖细胞微核千分率(M C N‰)及污染指数(PI),并进行F检验。结果显示:所有样点水样的微核率均在21‰～25‰,与对照组相比差异极显著,所有采样点水样的PI在3.5以上。表明亭湖水体受到重度污染,应加强污染综合治理,降低污染物对水体生物的毒害作用,保护亭湖水体景观生态。展开更多
Phytoplankton cell density, biomass, chl-α concentration and their seasonal fluctuations at five stations in the channel between Dongting Lake and the Changjiang （Yangtze） River were studied from May 1995 to Decemb...Phytoplankton cell density, biomass, chl-α concentration and their seasonal fluctuations at five stations in the channel between Dongting Lake and the Changjiang （Yangtze） River were studied from May 1995 to December 1997. The seasonal fluctuations had two peaks in a year in general. The annual patterns of total cell density and biomass indicated that diatoms contributed more than 70 percent of the total biomass （except from June to October） during the investigation period. Twenty-one dominant species contributed about 60--80 percent of the biomass in various months. The cell density, biomass and seasonal fluctuation were similar at Stations 1-4, but at Station 5 connected directly with the Changjiang River, the annual mean values （127.34×10^4cells/L and 0.46 mg/L in 1996, 41.98×10^4ceUs/L and 0.2 mg/L in 1997 respectively） were lower than those （ 195.92× 10^4 cells/L and 0.5 mg/L in 1996, 132.96 ×10^4 cells/L and 0.57 mg/L in 1997 respectively） at Station 1-4; and the curve of the seasonal fluctuation sometimes did not coincide with those at Stations 1-4. Based on criteria for evaluating trophic status, the dominant species, annual average cell density values of 114.86× 10^4-179.57× 10^4 cells/L, biomass of 0.48-0.5 mg/L, chl-αconcentration of 0.42-0.51 μg/L respectively recorded at five stations in 1996 and 1997, and values associated with the physico-chemical properties of the waterbody indicated that the water in the channel could be characterized as oligo-mesotrophic.展开更多
文摘利用蚕豆根尖细胞微核技术对平顶山市河滨公园湖区水质进行监测,测定各采样点水样的蚕豆根尖细胞微核千分率(M C N‰)及污染指数(PI),并进行F检验。结果显示:所有样点水样的微核率均在21‰～25‰,与对照组相比差异极显著,所有采样点水样的PI在3.5以上。表明亭湖水体受到重度污染,应加强污染综合治理,降低污染物对水体生物的毒害作用,保护亭湖水体景观生态。
基金Project 39670155 and 39430101 supported by NSFC.
文摘Phytoplankton cell density, biomass, chl-α concentration and their seasonal fluctuations at five stations in the channel between Dongting Lake and the Changjiang （Yangtze） River were studied from May 1995 to December 1997. The seasonal fluctuations had two peaks in a year in general. The annual patterns of total cell density and biomass indicated that diatoms contributed more than 70 percent of the total biomass （except from June to October） during the investigation period. Twenty-one dominant species contributed about 60--80 percent of the biomass in various months. The cell density, biomass and seasonal fluctuation were similar at Stations 1-4, but at Station 5 connected directly with the Changjiang River, the annual mean values （127.34×10^4cells/L and 0.46 mg/L in 1996, 41.98×10^4ceUs/L and 0.2 mg/L in 1997 respectively） were lower than those （ 195.92× 10^4 cells/L and 0.5 mg/L in 1996, 132.96 ×10^4 cells/L and 0.57 mg/L in 1997 respectively） at Station 1-4; and the curve of the seasonal fluctuation sometimes did not coincide with those at Stations 1-4. Based on criteria for evaluating trophic status, the dominant species, annual average cell density values of 114.86× 10^4-179.57× 10^4 cells/L, biomass of 0.48-0.5 mg/L, chl-αconcentration of 0.42-0.51 μg/L respectively recorded at five stations in 1996 and 1997, and values associated with the physico-chemical properties of the waterbody indicated that the water in the channel could be characterized as oligo-mesotrophic.
