The effects of salinity and N:P on N-rich toxins by both an N-fixing and non-N-fixing cyanobacteria.

ABSTRACT: Freshwater ecosystems are experiencing increased salinization. Adaptive management of harmful algal blooms (HABs) contribute to eutrophication/salinization interactions through the hydrologic transport of blooms to coastal environments. We examined how nutrients and salinity interact to affect growth, elemental composition, and cyanotoxin production/release in two common HAB genera. Microcystis aeruginosa (non-nitrogen (N)-fixer and microcystin-LR producer; MC-LR) and Aphanizomenon flos-aquae (N-fixer and cylindrospermopsin producer; CYN) were grown in N:phosphorus (N:P) 4 and 50 (by atom) for 21 and 33 days, respectively, then dosed with a salinity gradient (0 - 10.5 g L^-1). Both total MC-LR and CYN were correlated with particulate N. We found Microcystis M

SUBMITTER: Osburn FS 

PROVIDER: S-EPMC9915339 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature