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dc.contributor.authorWood, Susanna A
dc.contributor.authorMaier, Marcia Y
dc.contributor.authorPuddick, Jonathan
dc.contributor.authorPochon, Xavier
dc.contributor.authorZaiko, Anastasija
dc.contributor.authorDietrich, Daniel R
dc.contributor.authorHamilton, David P
dc.description.abstractCyanobacteria are commonly associated with eutrophic lakes, where they often form blooms and produce toxins. However, they are a ubiquitous component of phytoplankton in lakes of widely varying trophic status. We hypothesised that cyanobacterial diversity would vary among lakes of differing trophic status, but that the relative importance of geographical and hydromorphological characteristics driving these patterns would differ across trophic groups. DNA from 143 New Zealand lakes that spanned a range of geographic, hydromorphological and trophic gradients was analysed using automated rRNA intergenic spacer analysis and screened for genes involved in cyanotoxin production. Statistical analysis revealed significant delineation among cyanobacterial communities from different trophic classes. Multivariate regression indicated that geographical features (latitude, longitude and altitude) were significant in driving cyanobacterial community structure; however, partitioning of their effects varied among trophic categories. High-throughput sequencing was undertaken on selected samples to investigate their taxonomic composition. The most abundant and diverse (71 operational taxonomic units) taxon across all lake types was the picocyanobacteria genus Synechococcus Cyanotoxins (microcystins n = 23, anatoxins n = 1) were only detected in eutrophic lowland lakes. Collectively, these data infer that increasing eutrophication of lakes will have broad-scale impacts on planktonic cyanobacteria diversity and the prevalence of cyanotoxins.
dc.description.sponsorshipIan Potter Foundation
dc.description.sponsorshipGriffith University
dc.description.sponsorshipCawthron Institute Trust Board
dc.description.sponsorshipInstitute of Geological & Nuclear Sciences Limited
dc.description.sponsorshipReef and Rainforest Research Centre
dc.description.sponsorshipUniversities Australia
dc.description.sponsorshipDept of Science, Information Technology, Innovation & the Arts (DSITIA)
dc.description.sponsorshipGriffith University
dc.publisherOxford University Press
dc.relation.ispartofjournalFEMS Microbiology Ecology
dc.subject.fieldofresearchEnvironmental sciences
dc.subject.fieldofresearchBiological sciences
dc.subject.fieldofresearchBiomedical and clinical sciences
dc.subject.keywordsScience & Technology
dc.subject.keywordsLife Sciences & Biomedicine
dc.titleTrophic state and geographic gradients influence planktonic cyanobacterial diversity and distribution in New Zealand lakes
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationWood, SA; Maier, MY; Puddick, J; Pochon, X; Zaiko, A; Dietrich, DR; Hamilton, DP, Trophic state and geographic gradients influence planktonic cyanobacterial diversity and distribution in New Zealand lakes, FEMS Microbiology Ecology 2017, 93 (2)
gro.hasfulltextNo Full Text
gro.griffith.authorHamilton, David P.

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