Microcystin Concentrations, Partitioning, and Structural Composition during Active Growth and Decline: A Laboratory Study.

ABSTRACT: Microcystin can be present in variable concentrations, phases (dissolved and particulate), and structural forms (congeners), all which impact the toxicity and persistence of the algal metabolite. Conducting incubation experiments with six bloom assemblages collected from the Chowan River, North Carolina, we assessed microcystin dynamics during active growth and biomass degradation. Upon collection, average particulate and dissolved microcystin ranged between 0.2 and 993 µg L^-1 and 0.5 and 3.6 µg L^-1, respectively. The presence of congeners MC-LA, -LR, -RR, and -YR was confirmed with MC-RR and MC-LR being the most prevalent. Congener composition shifted over time and varied between dissolved and particulate phases. Particulate microcystin exponentially declined in five

SUBMITTER: Pierce EF 

PROVIDER: S-EPMC10746996 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature