Results 71 to 80 of about 13,733 (224)

Diversity of toxin and non-toxin containing cyanobacterial mats of meltwater ponds on the Antarctic Peninsula: a pyrosequencing approach [PDF]

, 2014
Despite their pivotal role as primary producers, there is little information as to the diversity and physiology of cyanobacteria in the meltwater ecosystems of polar regions.
Quesada, Antonio, Kuepper, F. C., Wood, Susie, Cires, S., Hildebrand, Frank, Convey, P., Küpper, Frithjof C., Agha, Ramsy, Hildebrand, F, Quesada, A., Convey, P, Convey, Peter, Dietrich, D.R., Kupper, FC, Pearce, D. A., Wood, SA, Dietrich, DR, Hildebrand, Falk, Quesada, A, Ciŕs, S., Kleinteich, J, Agha, R, Cirés, S, Küpper, Frithjof, Wood, Susie A., Hildebrand, F., Dietrich, Daniel R., Dietrich, Daniel, Kleinteich, Julia, Pearce, David, Kleinteich, J., Pearce, David A., Küpper, F.C., Pearce, D, Wood, S. A., Dietrich, D. R., K̈pper, F. C., Wood, S.A., Cirés, Samuel, Agha, R., Pearce, D.A.   +40 more
core   +1 more source

Effects of the Amino Acid Constituents of Microcystin Variants on Cytotoxicity to Primary Cultured Rat Hepatocytes

Toxins, 2013
Microcystins, which are cyclic heptapeptides produced by some cyanobacterial species from algal blooms, strongly inhibit serine/threonine protein phosphatase and are known as hepatotoxins.
Kumiko Shimizu, Tomoharu Sano, Reiji Kubota, Norihiro Kobayashi, Maiko Tahara, Tomoko Obama, Naoki Sugimoto, Tetsuji Nishimura, Yoshiaki Ikarashi   +8 more
doaj   +1 more source

A Review of the Effects of Freshwater Habitat Quality on Aquatic & Semi‐Aquatic Turtles

Ecology and Evolution, Volume 16, Issue 8, August 2026.
This literature review aims to provide a comprehensive review of the relationship between freshwater turtles and their aquatic environments. We also highlight areas which have been over‐ or under‐studied and offer recommendations for future research. ABSTRACT Freshwater turtles and terrapins require an aquatic habitat as part of their natural ecology ...
K. Sullivan, Eric Nordberg, Deb Bower
wiley   +1 more source

UVB Radiation as a Potential Selective Factor Favoring Microcystin Producing Bloom Forming Cyanobacteria

, 2013
Due to the stratospheric ozone depletion, several organisms will become exposed to increased biologically active UVB (280-320nm) radiation, not only at polar but also at temperate and tropical latitudes.
Ding, Yi, Sedmak, B (reprint author), Natl Inst Biol, Dept Genet Toxicol & Canc Biol, Ljubljana, Slovenia., Sedmak, Bojan, Song, Lirong   +3 more
core   +1 more source

Absence of Cyanotoxins in Llayta, Edible Nostocaceae Colonies from the Andes Highlands

Toxins, 2020
Edible Llayta are cyanobacterial colonies consumed in the Andes highlands. Llayta and four isolated cyanobacteria strains were tested for cyanotoxins (microcystin, nodularin, cylindrospermopsin, saxitoxin and β-N-methylamino-L-alanine—BMAA) using ...
Alexandra Galetović, Joana Azevedo, Raquel Castelo-Branco, Flavio Oliveira, Benito Gómez-Silva, Vitor Vasconcelos   +5 more
doaj   +1 more source

Nitrogen and Phosphorus Controls on Phytoplankton Growth and Bacterioplankton Communities in Wetland Impoundments

Freshwater Biology, Volume 71, Issue 8, August 2026.
ABSTRACT Nutrient enrichment in shallow lakes and ponds can shift systems from clear water, macrophyte dominance to turbid, phytoplankton dominance. Because the identity and threshold of the limiting nutrients vary among sites, system‐specific evidence is needed to guide water quality management. We conducted 3‐day in situ nutrient‐enrichment bioassays
Rachel. L. Wood, Jakob L. Young, Madeleine P. Malmfeldt, Adam J. Norris, Zachary T. Aanderud, Michelle A. Baker   +5 more
wiley   +1 more source

Congruence between mcy based genetic type and microcystin composition within the populations of toxic Microcystis in a plateau lake, China

, 2013
Genetic diversity and differential microcystin contributions within the populations of toxic Microcystis in freshwater ecosystems have not been fully discussed.
Yu, Gongliang, Li, Renhui, Li, RH (reprint author), Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China., Song, Gaofei, Jiang, Yongguang, Chai, Wenbo   +5 more
core   +1 more source

Nutrient disturbance in a shallow aquaculture pond impacts Microcystis gene expression but does not impact bacterial community function during bloom conditions

Journal of Phycology, Volume 62, Issue 4, Page 1297-1310, August 2026.
Abstract Cyanobacterial harmful algal blooms (cHABs) are worldwide issues. Reduced nitrogen forms (ammonium and urea) have recently been measured in freshwater systems at concentrations not previously recorded. These reduced nitrogen forms have been shown to favor the proliferation of harmful cyanobacteria.
Matthew F. Gladfelter, Hunter R. Baylous, Alan E. Wilson, Morgan M. Steffen   +3 more
wiley   +1 more source

Microcystin-LR induces aberrant expression of microRNAs in the liver of whitefish.

, 2016
Changes in 9 selected miRNAs expression (log fold change) assessed using qPCR (left panel) and miRNA-Seq method (right panel) in control (blue squares) and microcystin-LR-treated (100 μg MC-LR kg-1 body weight; red triangles) whitefish. Point markings in
Paweł Brzuzan (3155694), Alicja Łakomiak (3155691), Maciej Florczyk (3155697), Maciej Woźny (3155688)   +3 more
core   +1 more source

Microcystin mcyA and mcyE Gene Abundances Are Not Appropriate Indicators of Microcystin Concentrations in Lakes. [PDF]

PLoS ONE, 2015
Cyanobacterial harmful algal blooms (cyanoHABs) are a primary source of water quality degradation in eutrophic lakes. The occurrence of cyanoHABs is ubiquitous and expected to increase with current climate and land use change scenarios.
Lucas J Beversdorf, Sheena D Chaston, Todd R Miller, Katherine D McMahon   +3 more
doaj   +1 more source