Morphological and molecular analysis of bloom-forming Cyanobacteria in two eutrophic, shallow Mediterranean lakes

Kormas, Konstantinos Ar.; Gkelis, Spyros; Vardaka, Elisabeth; Moustaka‐Gouni, Maria

doi:10.1016/j.limno.2010.10.003

Cited by 34 publications

(29 citation statements)

References 40 publications

(54 reference statements)

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“…Along with these phylotypes, three Verrucomicrobia-like phylotypes were also retrieved, reinforcing the notion that some Verrucomicrobia are associated with Cyanobacteria-dominated waters [41, 42]. …”

Section: Resultssupporting

confidence: 55%

Plankton Microorganisms Coinciding with Two Consecutive Mass Fish Kills in a Newly Reconstructed Lake

Oikonomou

Katsiapi

Karayanni

et al. 2012

The Scientific World Journal

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Lake Karla, Greece, was dried up in 1962 and its refilling started in 2009. We examined the Cyanobacteria and unicellular eukaryotes found during two fish kill incidents, in March and April 2010, in order to detect possible causative agents. Both microscopic and molecular (16S/18S rRNA gene diversity) identification were applied. Potentially toxic Cyanobacteria included representatives of thePlanktothrixandAnabaenagroups. Known toxic eukaryotes or parasites related to fish kill events werePrymnesium parvumandPfiesteriacf.piscicida, the latter being reported in an inland lake for the second time. Other potentially harmful microorganisms, for fish and other aquatic life, included representatives of Fungi, Mesomycetozoa, Alveolata, and Heterokontophyta (stramenopiles). In addition, Euglenophyta, Chlorophyta, and diatoms were represented by species indicative of hypertrophic conditions. The pioneers of L. Karla’s plankton during the first months of its water refilling process included species that could cause the two observed fish kill events.

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Section: Resultssupporting

confidence: 55%

Plankton Microorganisms Coinciding with Two Consecutive Mass Fish Kills in a Newly Reconstructed Lake

Oikonomou

Katsiapi

Karayanni

et al. 2012

The Scientific World Journal

Self Cite

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“…Importantly, the algal populations described by plastid 23S rRNA gene sequencing resembled algal communities described in freshwater systems using other techniques. The dominant sequences identified in the 23S rRNA gene libraries were the same as the key species identified in reviews and studies of freshwater algal diversity (Paerl, ; Paerl et al ., ; Kormas et al ., ; Newton et al ., ). Sequencing of the plastid 23S rRNA gene was also able to distinguish different levels of algal community composition.…”

Section: Discussionmentioning

confidence: 99%

Pyrosequencing of plastid 23S rRNA genes reveals diverse and dynamic cyanobacterial and algal populations in two eutrophic lakes

Steven

McCann

Ward

2012

FEMS Microbiol Ecol

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Pyrosequencing of plastid 23S rRNA genes was performed to determine the usefulness of this methodology for describing spatial and temporal patterns of algal diversity in two eutrophic lakes. The majority of the sequences were identified as known cyanobacteria or eukaryotic algae (> 70% of sequence reads), indicating this approach can specifically recover algal sequences from complex communities. Furthermore, estimated coverage of the data sets indicated that the majority of the 23S rRNA genetic diversity was recovered in these surveys. Communities from algal mats could be clearly distinguished from algae in the water column, and the communities could be readily differentiated between the two lakes, suggesting that the plastid 23S rRNA sequencing was able to distinguish niche and biogeographic partitioning of algal communities. Within the sequence data sets, the ratio of cyanobacteria to eukaryotic algae fluctuated over the course of sampling, with cyanobacteria 23S rRNA sequences being more abundant in later samples. In addition, the eukaryotic algae communities showed large shifts in composition over the course of sampling. Taken together, these data demonstrate the usefulness of targeted plastid 23S rRNA sequencing for describing the structure and dynamics of complex algal communities.

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“…We compared the performance of C. raciborskii across temperatures with that of four strains of M. aeruginosa, a non-fixer that co-occurs with C. raciborskii, and which presumably competes with it for resources such as light and phosphorus (Conroy et al, 2007;Kormas et al, 2011). C. raciborskii appears to be displacing M. aeruginosa in some tropical and subtropical lakes (Chapman & Schelske, 1997;Saker & Griffiths, 2001), indicating that this competition may be ecologically important in temperate lakes.…”

Section: Introductionmentioning

confidence: 99%

Effects of temperature and nitrogen availability on the growth of invasive and native cyanobacteria

Thomas

Litchman

2015

Hydrobiologia

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Rising temperatures are expected to favour the growth of bloom-forming cyanobacteria in temperate lakes, but may also change the composition of cyanobacterial communities. To predict future community and bloom dynamics, it is therefore important to understand how bloom-forming species respond to temperature. Cylindrospermopsis raciborskii (Woloszynska) Seenayya & Subba Raju is an invasive, toxin-producing, nitrogen-fixer that may benefit from warming. To understand how changing temperatures will influence its ability to compete against native North American bloom-formers, we characterized the thermal reaction norms and temperature traits of three C. raciborskii strains, four strains of Microcystis aeruginosa (Kützing) Kützing and one strain of Anabaena flos-aquae (Lyng.) Brèb. C. raciborskii strains had higher optimum temperatures and survived higher temperatures than toxic M. aeruginosa strains, but had no apparent advantage over the non-toxic M. aeruginosa strain or A. flosaquae. M. aeruginosa strains and A. flos-aquae tolerated lower temperatures than C. raciborskii, suggesting that fitness differences at low temperature may be important in limiting the latter's spread. Furthermore, we found that nutrient availability strongly influenced thermal reaction norm shape: nitrogen deprivation lowered growth rates and decreased both low-and high-temperature tolerance, but did not affect the optimum temperature in C. raciborskii.

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Morphological and molecular analysis of bloom-forming Cyanobacteria in two eutrophic, shallow Mediterranean lakes

Cited by 34 publications

References 40 publications

Plankton Microorganisms Coinciding with Two Consecutive Mass Fish Kills in a Newly Reconstructed Lake

Plankton Microorganisms Coinciding with Two Consecutive Mass Fish Kills in a Newly Reconstructed Lake

Pyrosequencing of plastid 23S rRNA genes reveals diverse and dynamic cyanobacterial and algal populations in two eutrophic lakes

Effects of temperature and nitrogen availability on the growth of invasive and native cyanobacteria

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