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24 results for “Microcystis”
Oyster Microcystis aeruginosa feeding experiments, Lafayette-Louisiana, 2021-2022
To determine how the presence of the potentially harmful cyanobacteria M. aeruginosa affects oyster feeding, we quantified clearance rates, pseudofeces production, and pseudofeces composition across two feeding experiments conducted with a non-toxic strain. The first experiment consisted of bialgal feeding experiments where single oysters were fed treatments consisting of 1) only M. aeruginosa, 2) only the diatom Thalassiosira pseudonana, or 3) a 50/50 mix of the two species. To quantify effects of M. aeruginosa on oyster feeding under more environmentally relevant conditions — which includes numerous phytoplankton prey options and the presence of inorganic particles — a second feeding experiment was conducted using a natural phytoplankton community collected from a local estuary and oyster habitat. This natural community was then used to create two treatments, 1) an amended treatment where non-toxic M. aeruginosa was added, and 2) a natural treatment where only M. aeruginosa growth medium without cells was added.
Fig. 8. A – 18S in A Hotspot of Amoebae Diversity: 8 New Naked Amoebae Associated with the Planktonic Bloom-forming Cyanobacterium Microcystis
Fig. 8. A – 18S rDNA maximum likelihood phylogeny of Angulamoeba. Sequences new for this study are indicated in bold. ML bootstrap values respectively posterior probabilities are shown at the nodes. GenBank accession numbers are given together with the species names. B – LM pictures of Angulamoeba microcystivorans (strains A1WVB (1, 2, 4) and A4WVB (3)) showing the characteristic rusty-colored plasmodium-like mucilage matrix with embedded trophozoites devouring a culture of Microcystis aeruginosa colonies (1–2), multi-vacuolated trophozoites that are seemingly connected by their filopodia (3) and amoeba-flagellates in different stages of transition (4). Scale bars: 200 µm (1), 100 µm (2), 20 µm (3, 4).
Fig. 6. A – 18S in A Hotspot of Amoebae Diversity: 8 New Naked Amoebae Associated with the Planktonic Bloom-forming Cyanobacterium Microcystis
Fig. 6. A – 18S rDNA maximum likelihood phylogeny of Vexillifera, including the Microcystis-associated strain (in bold). ML bootstrap values respectively posterior probabilities are shown at the nodes. GenBank accession numbers are given together with the species names. B – LM pictures of locomotive (1–7, 12–13) and floating (8–11) amoebae. Microcystis cells inside food vacuoles are visible in (1–2) and (13). The arrow in (5) points to a temporal, uroid-like structure sometimes visible during locomotion. Scale bars: 20 µm.
Fig. 4. A – 18S in A Hotspot of Amoebae Diversity: 8 New Naked Amoebae Associated with the Planktonic Bloom-forming Cyanobacterium Microcystis
Fig. 4. A – 18S rDNA maximum likelihood phylogeny of the family Hartmannellidae, including Microcystis-associated strains of Copromyxa (in bold). ML bootstrap values respectively posterior probabilities are shown at the nodes. GenBank accession numbers are given together with the species names. B – LM pictures of C. microcystidis showing locomotive trophozoites (1–7, 10) containing a pronounced hyaline cap (white arrowheads), a vesicular nucleus with globular nucleolus (white arrows), big crystals (black arrows) and Microcystis cells inside food vacuoles (black arrowheads), non-oriented moving trophozoites (8–9, 11), a grazing amoeba capturing a Microcystis cell (12–14), the floating form (15) and a double-walled cyst stage (16). C – LM pictures of C. vandevyveri showing locomotive trophozoites (1, 6–9), trophozoites during non-oriented movement (2–5, 10–12) and floating forms (13–15). Black arrows indicate the presence of small, refractive crystals in the cytoplasm, the white arrow shows the vesicular nucleus with a globular lacuna-containing nucleolus, white arrowheads indicate a pronounced hyaline cap. Ingested Microcystis cells are visible in (9) and (11). Scale bars: 20 µm.
Fig. 3 in A Hotspot of Amoebae Diversity: 8 New Naked Amoebae Associated with the Planktonic Bloom-forming Cyanobacterium Microcystis
Fig. 3. TEM pictures of the scales on the cell surface of Korotnevella jeppesenii (a, c) and K. pelagolacustris (b, d) trophozoites viewed from top (a, b) and side (c, d). Scale bars: 500 nm.
Fig. 2. A – 18S in A Hotspot of Amoebae Diversity: 8 New Naked Amoebae Associated with the Planktonic Bloom-forming Cyanobacterium Microcystis
Fig. 2. A – 18S rDNA maximum likelihood phylogeny of Korotnevella, including Microcystis-associated strains (in bold). ML bootstrap values respectively posterior probabilities are shown at the nodes. GenBank accession numbers are given together with the species names. B – LM pictures of K. jeppesenii (strain A1JEPDK) showing trophozoites in non-oriented movement (1–5), during locomotion (6, 8) and during grazing on Microcystis aeruginosa cells (7) with the arrow indicating a lacuna-containing nucleolus. C – LM pictures of K. pelagolacustris (strains A8WVB (7, 12), A16WVB (6, 8, 11), A21WVB (1, 13), A54WVB (3–5) and A1LMS (2, 9, 10)) showing trophozoites in different stages of non-oriented movement (1–4, 6), the locomotive form (8–12), grazing amoebae with Microcystis cells inside food vacuoles (5, 10), the cyst stage (7) and the floating form (13). Arrows indicate the nucleus with clearly visible nucleolus (in 8, 10, 12). Scale bars: 20 µm.
Fig. 5 in A Hotspot of Amoebae Diversity: 8 New Naked Amoebae Associated with the Planktonic Bloom-forming Cyanobacterium Microcystis
Fig. 5. LM pictures of Schoutedamoeba minuta showing trophozoites in non-oriented movement (a–f) and the limax-shaped locomotive form (g–i). The presence of a pronounced hyaline cap, small adhesive uroidal filaments and tiny granules in the cytoplasm are indicated with white arrowheads, black arrows and a white arrow respectively. Scale bars: 20 µm.
Fig. 7. A – 18S in A Hotspot of Amoebae Diversity: 8 New Naked Amoebae Associated with the Planktonic Bloom-forming Cyanobacterium Microcystis
Fig. 7. A – 18S rDNA maximum likelihood phylogeny of Cochliopodium, including the Microcystis-associated strain (in bold). ML bootstrap values respectively posterior probabilities are shown at the nodes. GenBank accession numbers are given together with the species names. B – LM pictures of locomotive amoebae clearly showing the surrounding hyaline sheet (black arrows) punctuated with microscales (best visible in 8), a few small subpseudopodia (black arrowheads) and trailing adhesive uroidal filaments (white arrows) (1–5), a trophozoite during and just after grazing on Microcystis cells showing a prominent fringe of folded hyaloplasm (white arrowheads) (6–9), the bell-shaped form on colonies of Microcystis aeruginosa (10–11) and floating amoebae (12–13). Scale bars: 20 µm.
Depth dependent spatiotemporal dynamics of overwintering pelagic Microcystis in a temperate water body
<p>Supplementary Information for the research article 'Depth dependent spatiotemporal dynamics of overwintering pelagic Microcystis in a temperate water body'.</p>
Key files for: Comparative genomic analysis of Microcystis strain diversity using conserved marker genes
<p>Key data outputs to accompany the manuscript "Comparative genomic analysis of Microcystis strain diversity using conserved marker genes"</p>
Disruption of fish gut microbiota composition and holobiont's metabolome during a simulated Microcystis aeruginosa (Cyanobacteria) bloom
<p>This archive contains the R code, QIIME2 script and datasets used to perform the analyses and figures in the manuscript.</p>
Data from: Intraspecific divergence within Microcystis aeruginosa mediates the dynamics of freshwater harmful algal blooms under climate warming scenarios
Open the record for dataset details and reuse information.
Gull Lake long-term Microcystis monitoring at the Kellogg Biological Station, Hickory Corners, MI (1998 to 2014)
Dataset Abstract This dataset consists of 13 years of observations of Microcystis biomass and microcystin in an oligotrophic lake (Gull Lake, MI, USA), where it is promoted by invasive zebra mussels (Dreissena polymorpha). Annual means are reported for all variables. As originally published, the data were used to assess the influence of interannual variation in water temperature and zebra mussel mortality on Microcystis dynamics in an oligotrophic lake original data source http://lter.kbs.msu.edu/datasets/165
Data and analysis process for Microbiome processing of organic nitrogen input supports growth and cyanotoxin production of Microcystis aeruginosa cultures
<p>Data and analysis process for manuscript titled "Microbiome processing of organic nitrogen input supports the growth and cyanotoxin production of Microcystis aeruginosa cultures"</p>
Nitrogen and phosphorus concentrations shape tetracycline effects on Microcystis aeruginosa and Microcystis flos-aquae
<p>Continuous contamination of aquatic resources with broad-spectrum antibiotics, such as tetracycline, nitrogen and phosphorus disrupts the population dynamics of non-target organisms, including cyanobacteria, in freshwater ecosystems.</p>
Fig. 1. A – 18S in A Hotspot of Amoebae Diversity: 8 New Naked Amoebae Associated with the Planktonic Bloom-forming Cyanobacterium Microcystis
Fig. 1. A – 18S rDNA maximum likelihood phylogeny of Vannella, including Microcystis–associated strains (in bold). ML bootstrap values respectively posterior probabilities are shown at the nodes. GenBank accession numbers are given together with the species names. B – LM pictures of V. planctonica (strains A2FBB: 2, 4, 5, 9–13 and A4P4ZHB: 1, 3, 6–8) showing locomotive trophozoites (1–8), a grazing amoeba with a Microcystis cell inside a food vacuole (9), floating forms (10–11) and a cyst stage (12–13). C – LM pictures of V. simplex (strain A17WVB) showing the floating form (14), locomotive amoebae (15–18) with the presence of food vacuoles containing partly digested Microcystis cells (17), posteriorly adhered fecal pellets (15–16), a long flagellum-like pseudopodium encircling a Microcystis cell (17–18) and grazing amoebae on a colony of Microcystis aeruginosa with expanded (arrow) or contracted (arrowhead) flagellum-like pseudopodia visible in some of the trophozoites (19). The presence of a contracticle vacuole, a nucleus or a cyst opening is indicated by a black arrow, a black arrowhead or a white arrow respectively. Scale bars: 20 µm.
Bisulfite sequencing with Daphnia highlights a role for epigenetics in regulating stress response to Microcystis through preferential differential methylation of serine and threonine amino acidsing bi
GEO Series GSE83407. Daphnia magna. 6 samples. Type: Methylation profiling by high throughput sequencing.
Effects of microcystis on Daphnia pulex
GEO Series GSE36635. Daphnia pulex. 4 samples. Type: Expression profiling by array.
Differential expression of transcriptome under copper stress in Microcystis aeruginosa. PCC 7806
GEO Series GSE108380. Microcystis aeruginosa PCC 7806. 9 samples. Type: Expression profiling by high throughput sequencing.
Transcriptomics insight into the metabolism of the toxic producing Microcystis aeruginosa PCC 7806
GEO Series GSE255450. Microcystis aeruginosa. 24 samples. Type: Expression profiling by high throughput sequencing.
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Allen Brain Atlas
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