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- W2034127545 abstract "AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials AME 57:19-31 (2009) - DOI: https://doi.org/10.3354/ame01320 Diversity of Microcystis aeruginosa in the Klamath River and San Francisco Bay delta, California, USA Pia H. Moisander1,*, Peggy W. Lehman2, Mari Ochiai1, Susan Corum3 1University of California Santa Cruz, Ocean Sciences Department, 1156 High Street, Santa Cruz, California 95064, USA 2California Department of Water Resources, 901 P Street, Sacramento, California 95814, USA 3Karuk Tribe of California, Department of Natural Resources, PO Box 282, Orleans, California 95556. USA *Email: pmoisander@pmc.ucsc.edu ABSTRACT: Blooms of the toxin-producing cyanobacterium Microcystis aeruginosa have recently appeared in the Klamath River (KR) and San Francisco Bay delta (SFBD), California, USA. We investigated Microcystis diversity in these systems by targeting cpcBA (phycocyanin gene intergenic spacer and flanking regions) and mcyA gene (encodes part of a peptide synthetase cluster for production of the toxin microcystin). Distinct differences in Microcystis populations in the KR reservoirs (Copco and Iron Gate reservoirs) and SFBD were found in both gene loci, and diversity in the mcyA gene discriminated the populations in the 2 ecosystems entirely. The cpcBA sequences from KR fell into 2 main clusters, and were closely similar to sequences from North and South America, Europe, Asia, and Africa. The majority of the cpcBA sequences in populations from SFBD formed a unique group, while the remaining sequences were closely similar to those from KR. Salinity, soluble reactive phosphorus concentration, pH, water transparency, and NH4+ and NO3– + NO2– concentrations were significantly different in the 2 systems. The consistent differences in the 2 genetic markers between KR and SFBD populations suggest that Microcystis populations in the 2 watersheds have had limited connectivity or a different initial source population, or that environmental selection is creating distinct Microcystis populations in the eutrophic KR freshwater reservoirs and the saltwater influenced SFBD. Although Microcystis is globally distributed in temporal and subtropical climates, this study suggests local microdiversity exists and may be linked with environmental regulation. KEY WORDS: Microcystis · Phycocyanin intergenic spacer · Microcystin synthetase · cpcBA · mcyA · Estuaries · Reservoirs · Ecotype Full text in pdf format PreviousNextCite this article as: Moisander PH, Lehman PW, Ochiai M, Corum S (2009) Diversity of Microcystis aeruginosa in the Klamath River and San Francisco Bay delta, California, USA. Aquat Microb Ecol 57:19-31. https://doi.org/10.3354/ame01320 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AME Vol. 57, No. 1. Online publication date: September 08, 2009 Print ISSN: 0948-3055; Online ISSN: 1616-1564 Copyright © 2009 Inter-Research." @default.
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- W2034127545 title "Diversity of Microcystis aeruginosa in the Klamath River and San Francisco Bay delta, California, USA" @default.
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