title: Seasonal variations in the concentration of microcystin-LR in two lakes in western Texas, USA.
abstract: Seasonal variations in the concentration of microcystin-LR (MCLR) in Buffalo Springs Lake (BSL) and Lake Ransom Canyon (LRC; both locations in Lubbock, TX, USA) were monitored from 2003 to 2004. In BSL, the average concentrations of MCLR were 1.78 +/- 1.43 microg/L (mean +/- SD; range, 0.177-4.914 microg/L) in spring, 0.41 +/- 0.096 microg/L (range, 0.191-0.502 microg/L) in summer, 0.46 +/- 0.41 microg/L (range, 0.205-1.598 microg/L) in fall, and 1.04 +/- 0.71 microg/L (range, 0.096-2.428 microg/L) in winter. In LRC, the corresponding concentrations were 1.08 +/- 1.29 microg/L (range, 0.2-5.83 microg/L) in spring, 0.83 +/- 0.46 microg/L (range, 0.315-1.671 microg/L) in summer, 0.44 +/- 0.03 microg/L (range, 0.368-0.555 microg/L) in fall, and 0.78 +/- 0.52 microg/L (range, 0.225-2.130 microg/L) in winter. In both lakes, the seasonal fluctuation of MCLR concentrations correlated positively with dissolved oxygen and negatively with temperature and pH.
authors.affiliation: Department of Environmental Toxicology and The Institute of Environmental and Human Health, Texas Tech University, Lubbock, Texas 79409, USA.
authors.forename: Madhavi
authors.initials: M
authors.lastname: Billam
authors.forename: Lili
authors.initials: L
authors.lastname: Tang
authors.forename: Qingsong
authors.initials: Q
authors.lastname: Cai
authors.forename: Sandeep
authors.initials: S
authors.lastname: Mukhi
authors.forename: Hongxia
authors.initials: H
authors.lastname: Guan
authors.forename: Piwen
authors.initials: P
authors.lastname: Wang
authors.forename: Zemin
authors.initials: Z
authors.lastname: Wang
authors.forename: Christopher W
authors.initials: CW
authors.lastname: Theodorakis
authors.forename: Ronald J
authors.initials: RJ
authors.lastname: Kendall
authors.forename: Jia-Sheng
authors.initials: JS
authors.lastname: Wang
mesh_terms: D004784:Environmental Monitoring; D004791:Enzyme Inhibitors / Q000032:analysis*; D008387:Marine Toxins; D052998:Microcystins; D010456:Peptides, Cyclic / Q000032:analysis*; D012621:Seasons; D013781:Texas; D014867:Water / Q000737:chemistry; D014881:Water Supply
chemical_list: D004791:Enzyme Inhibitors; D008387:Marine Toxins; D052998:Microcystins; D010456:Peptides, Cyclic; D014867:Water; C057862:cyanoginosin LR