Cyanobacteria and microcystin in the Nebraska (USA) Sand Hills Lakes before and after modern agriculture

Efting, Aris; Snow, Daniel D.; Fritz, Sherilyn C.

doi:10.1007/s10933-011-9511-3

Cited by 21 publications

(18 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Equilibrium was reached after 4 h at 4 C, which was consistent with that found by Chen et al [16]. Semi-dry sediment was extracted directly or first lyophilized (referred to as dry sediment) in order to allow direct comparison to current extraction methods [15][16][17]25,26]. Recoveries were compared by Student's t-test analysis at p < 0.05.…”

Section: Sediment Sampling and Preparationsupporting

confidence: 75%

“…Estimates of the MDLs are lower than those reported to date and include microcystins rarely quantified [15,16,26,28], yet significant in lakes and known to cause wildlife mortalities [3,20]. Standard mix injections had RSDs of less than 5%.…”

Section: Rp-hplc-ms/ms Analysis Of Cyanotoxinsmentioning

confidence: 74%

“…Existing extraction methods lyophilize whole sediment without the separation of pore water to yield completely dry sediment [15,16,25,26]. Estimation of microcystins in the pore water fraction is important to understand the environmental fate of microcystins.…”

Section: Extraction Of Extracellular Cyanotoxins From Sedimentsmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of intracellular and extracellular microcystin variants in sediments and pore waters by accelerated solvent extraction and high performance liquid chromatography-tandem mass spectrometry

Zastepa

Pick

Blais

et al. 2015

Analytica Chimica Acta

View full text Add to dashboard Cite

Section: Sediment Sampling and Preparationsupporting

confidence: 75%

Section: Rp-hplc-ms/ms Analysis Of Cyanotoxinsmentioning

confidence: 74%

See 1 more Smart Citation

Analysis of intracellular and extracellular microcystin variants in sediments and pore waters by accelerated solvent extraction and high performance liquid chromatography-tandem mass spectrometry

Zastepa

Pick

Blais

et al. 2015

Analytica Chimica Acta

View full text Add to dashboard Cite

“…Lake sediments can provide records of trophic status and aquatic communities, reaching back from decades (e.g. Rinta-Kanto et al, 2009;Efting et al, 2011) to over 500 years (Pé rez et al, 2010). Although Microcystis-specific 16S rDNA and microcystin synthetase DNA (mcyA) sequences were found in Lake Erie sediment samples collected and stored since the 1970s, microcystins were not detectable in the stored sediments (RintaKanto et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

Analysis of microcystins and microcystin genes in 60–170-year-old dried herbarium specimens of cyanobacteria

et al. 2012

View full text Add to dashboard Cite

“…It has also been proposed that MCs accumulating in sediments are not fully immobilized, and diffusion to the water column may occur [60]. Nevertheless, MC content has been measured in sediment cores from Polish lakes [61], Nebraska, USA [62], and Canada [60,63]; and, as demonstrated, the toxin production could be tracked over the past ≈150 years. Very few studies have attempted to reconstruct MC production prior to recent human development around lake systems (pre-150 years); most studies have utilized a variety of extraction techniques, and one of two analytical techniques: liquid chromatography-mass spectrometry (LC-MS), or gas chromatography-mass spectrometry (GC-MS) ( Tables 1 and 2).…”

Section: Microcystins (Mcs)mentioning

confidence: 99%

A Review on the Study of Cyanotoxins in Paleolimnological Research: Current Knowledge and Future Needs

Henao

Rzymski

Waters

2019

Toxins

View full text Add to dashboard Cite

Cyanobacterial metabolites are increasingly studied, in regards to their biosynthesis, ecological role, toxicity, and potential biomedical applications. However, the history of cyanotoxins prior to the last few decades is virtually unknown. Only a few paleolimnological studies have been undertaken to date, and these have focused exclusively on microcystins and cylindrospermopsins, both successfully identified in lake sediments up to 200 and 4700 years old, respectively. In this paper, we review direct extraction, quantification, and application of cyanotoxins in sediment cores, and put forward future research prospects in this field. Cyanobacterial toxin research is also compared to other paleo-cyanobacteria tools, such as sedimentary pigments, akinetes, and ancient DNA isolation, to identify the role of each tool in reproducing the history of cyanobacteria. Such investigations may also be beneficial for further elucidation of the biological role of cyanotoxins, particularly if coupled with analyses of other abiotic and biotic sedimentary features. In addition, we identify current limitations as well as future directions for applications in the field of paleolimnological studies on cyanotoxins. Key Contribution:This review provides updated information on paleolimnological studies of cyanotoxins and highlights their value for the understanding of the history and occurrence of toxic cyanobacteria, as well as understanding the potential environmental drivers of cyanotoxin production.Toxins 2020, 12, 6 2 of 15 of cylindrospermopsin production also exist [3]. These timescales imply that cyanobacterial toxins play ecological role(s) other than grazer defense, and that their toxicity towards zooplankton may only be an indirect effect of their production and release into the water column. Cyanotoxin biological function still remains a subject of debate and various hypotheses, derived mostly from experimental observations, on their potential intra-and extracellular roles have been put forward [1,[12][13][14].Like the ecological role of cyanobacterial metabolites, the environmental triggers causing toxin production lack definite identification in experimental and monitoring investigations. Nutrients, frequently associated with cultural eutrophication (nitrogen and phosphorus) in freshwaters, have been identified as key drivers of toxin production [15], but cyanobacteria in selected hypereutrophic systems do not produce cyanotoxins [1]. Nutrients that generally have less influence on trophic state in freshwater ecosystems, such as S and Fe, have also been associated with toxin occurrence [16], as have changes in N/P ratios [15]. Biological drivers, such as zooplankton grazing pressure and allelopathy [1], have been linked to cyanobacteria toxin production; along with abiotic factors, such as temperature and light intensity [17,18]. While recent genetic, experimental, and monitoring efforts have provided extensive knowledge of cyanobacterial metabolites, placing these data into a historic context and determining whether toxi...

show abstract

Cyanobacteria and microcystin in the Nebraska (USA) Sand Hills Lakes before and after modern agriculture

Cited by 21 publications

References 30 publications

Analysis of intracellular and extracellular microcystin variants in sediments and pore waters by accelerated solvent extraction and high performance liquid chromatography-tandem mass spectrometry

Analysis of intracellular and extracellular microcystin variants in sediments and pore waters by accelerated solvent extraction and high performance liquid chromatography-tandem mass spectrometry

Analysis of microcystins and microcystin genes in 60–170-year-old dried herbarium specimens of cyanobacteria

A Review on the Study of Cyanotoxins in Paleolimnological Research: Current Knowledge and Future Needs

Contact Info

Product

Resources

About