Sentences with word «cyanobacterium»

The frequency of blooms of cyanobacteria in the tidal waters of the Chesapeake estuary has increased from about 13 per year in the 1990s to 23 in the 2000s.
As this nutrient enrichment, or «eutrophication» increases, so will the proportion of toxin - producing strains of cyanobacteria in harmful algal blooms, scientists said.
That is likely what happened to the oxygen produced by cyanobacteria early in Earth's history.
«Our results suggest that current phosphorus loading targets will be insufficient for reducing the intensity of cyanobacteria blooms to desired levels, so long as the lake remains in a heightened state of bloom susceptibility,» said lead author Daniel Obenour of the U-M Water Center.
In a study published online Oct. 8 in the journal Water Resources Research, scientists from U-M and the National Oceanic and Atmospheric Administration conclude that microcystin - producing cyanobacteria in Lake Erie are becoming more sensitive to phosphorus and that reductions may have to cut far deeper than recently proposed targets.
Scientists continue to study photosynthetic organisms such as cyanobacteria for their potential as bioenergy sources.
«Our lab and others have put a gene from cyanobacteria into crop plants and found that it boosts the photosynthetic rate by 30 percent,» he said.
The team presents new isotopic data showing that a burst of oxygen production by photosynthetic cyanobacteria temporarily increased oxygen concentrations in Earth's atmosphere.
Last year Swedish researchers also found the neurotoxin in bottom - feeding fish living in the Baltic Sea, a hotbed for cyanobacteria blooms, although at lower levels than seen in the Chesapeake Bay and along the Florida coast.
«This will eventually lead to a greater prevalence of blue - green algae called cyanobacteria which fix atmospheric nitrogen,» he added.
Some researchers have suggested that fish and shellfish from waters contaminated with cyanobacteria blooms may be one way that people ingest BMAA.
Nevertheless, ocean warming was previously predicted to cause a shift in the geographical distribution of Trichodesmium toward higher latitudes, extending its niche to subtropical regions and potentially reducing its range in tropical ocean basins.Overall, the biological responses of the marine diatom Chaetoceros socialis and the N2 - fixing cyanobacteria Trichodesmium IMS101 to several key climate change processes were presented and discussed in this study.
Elevated CO2 enhances nitrogen fixation and growth in the marine cyanobacterium Trichodesmium.
Both Sonntag and Huisman say they would like to ask oceanographers to measure seawater temperature where cyanobacteria grow and in nearby empty areas to test the new model's predictions and to improve future versions.
They found an unexpectedly high degree of sharing and exchange of genetic material between the tiny, green, photosynthetic cyanobacteria Synechococcus, which are abundant in these scalding, inhospitable environments.
«Cyanobacteria used for the production of chemicals.»
Using genetically modified living cyanobacteria as catalysts for photosynthesis driven biotransformations is a new approach.
Spirulina is similar to seaweed but it is classified as a «blue - green cyanobacteria
Because cyanobacteria also grow well in still water, blooms are becoming more frequent in rivers that have been dammed to create reservoirs.
Community Structures of Phytoplankton with Emphasis on Toxic Cyanobacteria in an Ohio Inland Lake during Bloom Season
They usually take the form of chloroplasts, which like cyanobacteria contain chlorophyll and produce organic compounds (such as glucose) through photosynthesis.
Bottom - feeders registered notably high, perhaps because cyanobacteria accumulate not only on the ocean surface but also along the seafloor.
So if cyanobacteria are shaping the temperature of their growing patch of the ocean to favor themselves over cold - water critters, researchers want to know how they are doing it and what to expect next, says climate scientist Sebastian Sonntag of the University of Hamburg in Germany.
stromatolite A type of layered rock that forms when cyanobacteria in water create huge communities.
The data suggest that ALS is 2.5 times more common than average within one - half mile of a lake or pond where cyanobacteria have bloomed.
His lab maintains a collection of marine cyanobacteria and cyanoviruses.
They compared protein profiles from mutants of a strain of cyanobacterium Synechocystis 6803.
One possibility could be related to dinoflagellates and cyanobacteria found upstream in the catchment, which might be releasing toxins similar to those that cause red tides in marine environments, says Peter Ashton, a water resources specialist at the Council for Scientific and Industrial Research in South Africa and the University of Pretoria.
If enzymes are genetically introduced into cyanobacteria, thanks to their catalytic function they will drive the chemical reaction, thus rendering the expensive reducing equivalent superfluous.
They observed a regular circadian rhythm when they kept altered cyanobacteria in constant darkness, with a constant supply of sugar.
Preliminary findings suggest that BMAA and other cyanobacteria cells are being aerolized.
Brand has spent a lot of time at sea over the past 15 years studying cyanobacteria blooms.
The lowest layer contained frozen microbes, most likely cyanobacteria.
The researchers carried out lab experiments seeking a link between high concentrations of iron and low cyanobacteria growth.
According to Schopf, the fossils he found in Western Australia indicate that Earth's earliest inhabitants resembled cyanobacteria, single - celled organisms that turn sunlight into energy.
Cyanobacteria appeared 3 billion years ago, but it took another half a billion years before oxygen levels could support complex life.
The ability to use light wavelengths other than those absorbed by plants, algae, and other cyanobacteria confers a powerful advantage to those organisms that produce chlorophyll f — they can survive and grow when the visible light they normally use is blocked.
Crusts containing cyanobacteria may lie dormant in the soil for most of the year, but get kicked up during spring rainstorms.
While there is scientific consensus that phosynthetic cyanobacteria became prodigious at some point in the Archaean, as evidenced by first the rusting of the earth and ultimately the oxygenation of the atmosphere, just when that occurred remains both uncertain and contentious.
Some palaeontologists think stromatolites were formed when growing mats of cyanobacteria trapped sediments and eventually fossilised.
Microcystins, produced by freshwater cyanobacteria in the genus Microcystis, are hepatotoxins that cause liver damage in people and animals.
During the 62nd Biophysical Society Annual Meeting, held Feb. 17 - 21, in San Francisco, California, Andy LiWang at the University of California, Merced will present his lab's work studying the circadian clock of blue - green colored cyanobacteria.
Neurologist Elijah Stommel of Dartmouth — Hitchcock Medical Center has been investigating the link between cyanobacteria - produced BMAA and neurodegenerative disease from an epidemiological angle.
Emergent phototactic responses of cyanobacteria under complex light regimes.
In August 2015 a thick bloom of algae known as Microcystis cyanobacteria re-appeared in Lake Atitlan; the first major occurrence was in 2009.
Lake Erie has become increasingly susceptible to large blooms of toxin - producing cyanobacteria since 2002, potentially complicating efforts to rein in the problem in the wake of this year's Toledo drinking water crisis, according to a new study led by University of Michigan researchers.
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