Persistence of cyanobacterial hepatotoxin, microcystin-LR in particulate material and dissolved in lake water

Toxin release in response to oxidative stress and programmed cell death in the cyanobacterium Microcystis aeruginosa

“…The early stages of a toxic bloom are characteristically associated mostly with intracellular toxins. As the bloom ages, cell death ensues and the concentration of extracellular toxins increases (Lahti et al, 1997, White et al, 2005. Our collection of water from a dense bloom (surface scum as shown in Fig.…”

Sorption, degradation and mobility of microcystins in Chinese agriculture soils: risk assessment for groundwater protection

“…The content of total organic carbon in soil C is nearly two times than that in soil A, therefore the significant differences in leaching behavior between the two soils may be the result of processes such as: the formation of soluble complexes with soil solution components such as dissolved organic matter; or the incomplete interaction of these toxins with the solid state organic or inorganic matter in the soil (Baskaran et al, 1996b). MCs can be degraded within 4 weeks in surface water (Ishii et al, 2004;Lahti et al, 1997); however, they can persist for 100 days in groundwater with their concentration not significantly decreased due to lack bacterium (Holst et al, 2003). Therefore, during the course of eliminating surface water contamination, a strong groundwater pollution prevention strategy should be practiced as well.…”

“…There is much research on the fate of MCs in water columns and aquatic organisms (Ishii et al, 2004;Lahti et al, 1997;Pflugmacher et al, 1998). However, to our knowledge, very little information is available on the fate of MCs in soils (Morris et al, 2000;Tsuji et al, 2001).…”

Optimization of an effective extraction procedure for the analysis of microcystins in soils and lake sediments

“…There have already been a number of studies on the fate of microcystins in water columns and aquatic organisms (Lahti et al, 1997;Pflugmacher et al, 1998;Ishii et al, 2004). However, only a few studies on the fate of microcystins in lake sediment and soils are available (Tsuji et al, 2001;Holst et al, 2003).…”