Sentences with phrase «producing cyanobacteria»

The evolution of oxygen - producing cyanobacteria was arguably the most significant event in the history of life after the evolution of life itself.

This research not only provides the first clear evidence that microorganisms were directly involved in the deposition of Earth's oldest iron formations; it also indicates that large populations of oxygen - producing cyanobacteria were at work in the shallow areas of the ancient oceans, while deeper water still reached by the light (the photic zone) tended to be populated by anoxyenic or micro-aerophilic iron - oxidizing bacteria which formed the iron deposits.

In a high - light, oxidizing environment, microcystin - producing cyanobacteria have a survival advantage over other forms of cyanobacteria that are not toxic.

There are more than 123,000 lakes greater than 10 acres in size spread across the United States, and based on the last EPA National Lakes Assessment, at least one - third may contain toxin - producing cyanobacteria.

One possibility is that the spread of invasive quagga and zebra mussels in the lake has promoted the dominance of microcystin - producing cyanobacteria and has altered the lake's phosphorus cycle.

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.

Scientists have developed a model which gives the maximum potential capacity of water masses to produce cyanobacteria at different phosphorus concentrations reaching lakes and reservoirs from agricultural or industrial activities.

Not exact matches

But with our planet as their guide, astrobiologists are forced to acknowledge that oxygen may be the least likely thing they will ever see — genetic evidence suggests the complex oxygen - producing photosynthetic pathway pioneered by cyanobacteria is an extraordinary evolutionary innovation that only appeared once throughout the entire multi-billion-year history of Earth's biosphere.

The seeds were meticulously washed to remove toxins, such as beta - methylamino - L - alanine (BMAA), produced by cyanobacteria that inhabit cycad roots.

«When Paul Cox came out with his paper saying that cyanobacteria produce BMAA,» he says with a lingering Texan twang, «I thought, whoa, we'd better look into this because here in Florida we get some really big blooms.»

The alga or cyanobacterium produces food by converting energy from the sun and carbon dioxide into sugars.

Since 1867, scientists have recognized the fundamental partnership that produces lichens: A fungus joins with an alga or cyanobacteria in a relationship that benefits both individuals.

Quagga and zebra mussels shun toxin - producing Microcystis cyanobacteria and feed instead on other species of phytoplankton at the base of the lake's food chain, including algae.

For some 140 years, scientists have understood lichens to be a symbiosis between a fungus, which provides a physical structure and supplies moisture, and a photosynthesizing alga or cyanobacterium, which produces nutrients.

Cyanobacteria: Such tiny organisms produced today's proportion of about 20 percent oxygen in the atmosphere of the earth.

The experiment showed that, without this enzyme, these cyanobacteria could no longer synthesize chlorophyll f. By artificially adding the gene that encodes the enzyme, the researchers also showed that this one enzyme is all that is necessary to convert cyanobacteria that normally do not produce chlorophyll f into ones that can produce it.

Photosystem II is the light - driven enzyme that oxidizes water to produce oxygen in plants, algae and cyanobacteria.

«It produces the beam of aerosolized live cyanobacteria with very little solvent, which allows for low - noise diffraction patterns.

But scientists are still debating at what point the Earth's atmosphere contained enough oxygen (produced by cyanobacteria) to allow the formation of big iron deposits.

«Toxins produced by cyanobacteria represent a significant health risk both in water used for consumption and for recreation.

An international research team has analysed the relationship between the amount of phosphorus recorded in 1,500 European lakes and reservoirs, and the growth of cyanobacteria, a toxin - producing microorganism.

Sonntag and his colleagues have adapted a computer model that describes the mixing of layers of seawater to take into account two kinds of changes produced by the cyanobacterium Trichodesmium: more light absorption and less choppy waves.

Schopf decided that at least half could be cyanobacteria, or blue - green algae, the first organisms in the evolutionary record to produce oxygen.

Some cyanobacteria produce toxic compounds that can sicken people.

The earth's early oceans initially contained little oxygen, but cyanobacteria produce it as a by - product of photosynthesis.

While the cyanobacteria toxin that prompted the Toledo water crisis can cause diarrhea, intestinal pain and liver problems, other toxins produced by the blue - green algae can harm the nervous systems of humans and wildlife.

Using nondestructive neutron scattering techniques, scientists are examining how single - celled organisms called cyanobacteria produce oxygen and obtain energy through photosynthesis.

On the other hand, many anaerobic microbes including methanogens are easily poisoned by oxygen, and the recent discovery of banded sediments with rusted iron on Akilia Island in West Greenland suggests that oxygen - producing, photosynthetic microbes (e.g., cyanobacteria) living on the surface of wet areas to gather sunlight may have developed by the end of this geologic period (3.85 billion years ago) despite continuing bombardment from space.

Previous workshops examined the environmental effects of an E.coli - based arsenic biosensor, a cyanobacteria modified to produce sugars and a rE.coli chassis (modified genetic code chassis).

Cyanosite — NASA image of Chroococcidiopsis Dividing Chroococcus sp., a type of cyanobacteria, photosynthetic microbes that also produce oxygen.

Given at least nine meters (roughly 30 feet) of water on the planet, photosynthetic microbes (including mats of algae, cyanobacteria, and other photosynthetic bacteria) and plant - like protoctists (such as floating seaweed or kelp forests attached to the seafloor) could be protected from «planet - scalding» ultraviolet flares produced by young red dwarf stars, according to Victoria Meadows of Caltech, principal investigator at the NASA Astrobiology Institute's Virtual Planetary Laboratory.

«The abundance of Spartobacteria correlates with some specific Cyanobacteria so most likely these produce what Spartobacteria eat.

Living in colonies, the cyanobacteria produced oxygen during the process of photosynthesis, which generated the oxygen in the Earth's atmosphere that many living beings require today.

Ancestors of today's cyanobacteria developed photosynthesis, a process that uses energy from sunlight, water and carbon dioxide to produce carbohydrates.

They usually take the form of chloroplasts, which like cyanobacteria contain chlorophyll and produce organic compounds (such as glucose) through photosynthesis.

But researchers at Cornell University, USA and Rothamsted Research, UK claim they've managed to solve one piece of the puzzle: they've modified tobacco plants that produce functional rubisco from the cyanobacterium Synechococcus elongatus.

Water quality and the toxin beta methyl - amino - alanine produced by cyanobacteria are suspected environmental triggers.

Cyanobacteria exposed to light produce enough oxygen to keep the heart beating.

Just like plants, cyanobacteria can produce energy out of sunlight, via the process called photosynthesis.

Some cyanobacteria that can form CyanoHABs (Harmful Algal Blooms) produce toxins that are among the most powerful natural poisons known.

Because Earth's freshwater is limited, using saltwater to grow cyanobacteria will produce biofuels that are an even more sustainable energy choice.

catalyzed by the growth and physiology of cyanobacteria in the Genus Synechococcus represents a potential mechanism for sequestration of atmospheric CO2 produced during the burning of coal for power generation.

Precipitation of CaCO3more» catalyzed by the growth and physiology of cyanobacteria in the Genus Synechococcus represents a potential mechanism for sequestration of atmospheric CO2 produced during the burning of coal for power generation.

The researchers have shown that Synechococcus cyanobacteria — which use light to capture carbon dioxide from the air and produce energy for the marine food chain — contain specific genes which alters their pigmentation depending on the type of light in which they float.