[Distribution of microcystin-LR and anatoxin-A and their influence factors in Dianshan Lake during summer and autumn].
Six different sampling locations in Dianshan Lake were selected to study the distributions of algaes and algae toxins and their influencing factors in summer and autumn. Total nitrogen (TN), total phosphorous (TP), Fe, chlorophyla(Chla) and COD in water samples were determined. At the same time, water temperature (TEM), pH value, illumination, turbidity degree (TUR) of water body were recorded. In addition, the total number and attribute of algae cell and the content of microcystin-LR(MC-LR) and anatoxin-A(ANTX-A) were checked. The results showed that the pollution of both toxins was most serious in July. The MC-LR were mostly distributed in Wangxiang, but the ANTX-A were mostly distributed in Jishuigang. Generalized estimating equations (GEE) regression analysis showed that total number of algae cell was significantly correlated with TN, TP and Chla (P < 0.05). The distribution of MC-LR was significantly affected by total number of algae cells and TEM (P < 0.01), but TUR mainly affected the distributions of ANTX-A(P < 0.01). There was weak correlation between both toxins (P < 0.05). In short, there was a serious pollution of MC-LR, but ANTX-A pollution was light. The factors influencing the distributions of both algae toxins were not completely consistent.
Zhang
Zhihong
Z
Department of Environment Health, School of Public Health, Fudan University, Shanghai 200032, China.
Zhao
Jinming
J
Jiang
Songhui
S
Qu
Weidong
W
Zhu
Huigang
H
D001427:Bacterial Toxins / Q000032:analysis*; D025541:Bacteriochlorophyll A / Q000032:analysis; D002681:China; D000087522:Cyanobacteria Toxins; D056890:Eukaryota / Q000166:cytology*; D008387:Marine Toxins / Q000032:analysis*; D052998:Microcystins; D009584:Nitrogen / Q000032:analysis; D010456:Peptides, Cyclic / Q000032:analysis*; D010758:Phosphorus / Q000032:analysis; D012621:Seasons; D014326:Tropanes; D014873:Water Pollutants / Q000032:analysis*
D001427:Bacterial Toxins; D025541:Bacteriochlorophyll A; D000087522:Cyanobacteria Toxins; D008387:Marine Toxins; D052998:Microcystins; D010456:Peptides, Cyclic; D014326:Tropanes; D014873:Water Pollutants; D010758:Phosphorus; C509783:anatoxin a; C057862:cyanoginosin LR; D009584:Nitrogen