Sentences with phrase «by algal»

This has a variety of unwholesome consequences, most importantly the increasing number of coastal «dead zones» caused by algal blooms feeding on fertiliser - rich run - off waters.

After ruling out previous causes of such mass deaths — cold weather, disease like morbillivirus and even poisoning by algal bloom — fisheries scientists are left with only one conclusion: «Put all that evidence together and it supports the hypothesis that the oil spill contributed to the increase in deaths,» says veterinarian Stephanie Venn - Watson of the National Marine Mammal Foundation in San Diego.

Many large, eutrophic lakes such as Lake Erie are plagued each year by algal blooms so massive that they are visible from outer space.

Biologists have long known that toxins produced by algal blooms — exploding populations of minute, marine algae — can accumulate in shellfish that graze on them.

The toxins produced by some algal blooms may have evolved to give predatory algae an advantage when it comes to capturing their prey, researchers say.

The Benguela ecosystem, once a rich sardine fishery, is today infested by algal blooms and jellyfish swarms.

Not exact matches

They started by adding carbon to Lake 227 which disproved the detergent industry's theory on the origin of algal blooms.

Cuomo plans to have four regional algal bloom summits across the state led by the Water Quality Response Team, DEC and state health commissioner.

Basil Seggos, commissioner of the Department of Environmental Conservation, was questioned by lawmakers about the state's algal bloom problem during his nearly three - hour testimony.

Cuomo yesterday kicked off the first in a series of four summits addressing upstate lakes and other waterways threatened by harmful algal blooms, which can affect water quality and diminish recreational opportunities and tourism.

Since the algal species is native to eastern Canada, its recent blooms and rapid proliferation in rivers since 2006 — which have angered anglers looking for pristine waters — have been caused by an environmental trigger, with climate change a likely culprit, said Michelle Lavery, a master's degree student at the Canadian Rivers Institute and lead author of the research, published in theCanadian Journal of Fisheries and Aquatic Sciences.

Fishermen unhappy, scientists baffled The algal blooms are despised by many anglers in eastern Canada, and many have poured money into research.

Predator diversity was increased by it, but understory algae decreased as expected because the giant seaweed shades the bottom and prevents other algal species from doing well.

James Castle and John Rodgers of Clemson University think that such algal blooms — triggered by warming water or an increase in nutrients — might be behind the five largest mass extinctions in Earth's history.

Hawaii even has an ongoing effort to turn ocean thermal energy conversion technology into a reality, as well as an actual algal agriculture industry — the algae are largely grown for nutraceutical purposes but have also been turned into jet fuel on the mainland by UOP.

The new study by Stefanie Lutz, postdoc at the German Research Centre for Geosciences GFZ and at the University of Leeds, shows a 13 per cent reduction of the albedo over the course of one melting season caused by red - pigmented snow algal blooms.

Sometimes, these threats are exacerbated by natural trends, such as changing ocean currents that help spark harmful algal blooms in waters already loaded with nutrients washed from farm fields.

By investigating the interactions within algal colonies, researchers hope to understand how single cells took the evolutionary leap to mass organization hundreds of millions of years ago.

A pyrenoid (blue) is seen in a cross-section of an algal cell by false - colored electron microscopy.

Algal blooms that are toxic to fish and animals would increase by 5 percent.

A clue came from local residents who told researchers that the die - off coincided with a «red tide» of harmful algal and a giant plume of smoke created by massive fires hundreds of kilometers away.

For years scientists have known that nitrogen and phosphorus, which commonly enter freshwater lakes in chemical fertilizers, play a role in eutrophication — the process by which algal blooms, turbidity, and oxygen deficiencies turn a lake into a dead zone, largely devoid of animal life.

Instead, the study said the mass mortality was likely caused by a harmful algal bloom.

The researchers examined the environmental drivers by season, and found that wind speed affected the spread of algal blooms consistently throughout spring, summer and fall.

Regulations on the amount of nitrate that may be released vary by state, but excess nitrate contributes to algal blooms in natural bodies of water, depleting oxygen levels for aquatic organisms.

Correction: A previous version of this story referred to the algal species studied by Smith and colleagues as «Californian.»

A study led by researchers at the University of Washington and the National Oceanic and Atmospheric Administration connects the unprecedented West Coast toxic algal bloom of 2015 that closed fisheries from southern California to northern British Columbia to the unusually warm ocean conditions — nicknamed «the blob» — in winter and spring of that year.

A recent study of harmful algal blooms in the Chesapeake Bay and its tributaries by the University of Maryland Center for Environmental Science show a marked increase in these ecosystem - disrupting events in the past 20 years that are being fed by excess nitrogen runoff from the watershed.

NOAA's National Ocean Service has been funding monitoring and research for the dead zone in the Gulf of Mexico since 1985 and currently oversees the NGOMEX program, the hypoxia research effort for the northern Gulf which is authorized by the Harmful Algal Bloom and Hypoxia Research and Control Act.

The tests showed that within two hours blue - green algae is significantly reduced by doses of H2O2 to a greater extent even than Prymnesium and other algal organisms.

«Considering both the algal concentrations in lakes near the highways, not just road salt application rates, will ensure that aquatic life is not damaged by winter road maintenance,» notes Yan.

By looking at the color of the water and other data from tens of thousands of data points, she could determine the timing, intensity and extent of algal blooms.

UT Austin researchers Thomas Murphy (left) and Dr. Halil Berberoglu (right) have developed a novel approach to cultivating algal biofuels by designing synthetic trees.

These findings have implications for food safety policies in areas affected by toxic marine algal blooms.

Just like their red algal ancestors, cryptophytes utilise not only the green pigment chlorophyll for harvesting light, but have also the capability to use green light being missed by chlorophyll.

The research programs supporting this work are authorized under the Harmful Algal Bloom and Hypoxia Research and Control Act, known as HABHRCA, which was amended and reauthorized by Congress through 2018.

NOAA, NASA, EPA, and the U.S. Geological Survey announced, in April, a $ 3.6 million multi-agency research effort designed to be an early warning system for freshwater nuisance and toxic algal blooms by using satellites that can gather color data from freshwater bodies during scans of the Earth.

As the summer progresses, field observations on water quality, algal biomass and toxicity will be collected by NOAA GLERL and CILER, the Ohio State University's Sea Grant Program and Stone Laboratory, Heidelberg University, the University of Toledo, Ohio EPA, and LimnoTech.

In nature, nitrogen and phosphate pollution harms aquatic life by spurring the growth of algal blooms.

Reefs in the Caribbean and in Southeast Asia are suffering particularly seriously from algal blooms caused by abundant nutrients.

During the third event, in September 2012, another algal bloom created so much dead algae that it clogged the researchers» sediment traps, but was captured by a time - lapse camera.

«It has long been thought that the algal blooms found in Lake Okeechobee, which are caused by pollution such as runoffs from farms, were solely responsible for driving the blooms and their toxins in the St. Lucie Estuary,» said Brian E. Lapointe, Ph.D., lead author of the study and a research professor at FAU Harbor Branch, who recently presented these findings at the ninth U.S. National Harmful Algal Bloom Conferalgal blooms found in Lake Okeechobee, which are caused by pollution such as runoffs from farms, were solely responsible for driving the blooms and their toxins in the St. Lucie Estuary,» said Brian E. Lapointe, Ph.D., lead author of the study and a research professor at FAU Harbor Branch, who recently presented these findings at the ninth U.S. National Harmful Algal Bloom ConferAlgal Bloom Conference.

As sea ice decreases dramatically across polar oceans, some scientists see a silver lining: The algal blooms that seem to thrive where ice has recently disappeared could damper climate change by trapping carbon in the deep ocean.

A report in the 15 February issue of the Proceedings of the National Academy of Sciences suggests that a lotion containing an algal protein can ward off sunburns — often the first step on the road to skin cancer — by repairing part of the damage to skin cells» chromosomes.

The researchers found that the types of organic compounds found in microbial and algal life — long chain hydrocarbon - dominated matter - were destroyed by the pressures of impact.

The findings, they wrote, «support the hypothesis that sporadic ALS can be triggered by environmental lake quality and lake conditions that promote harmful algal blooms and increases in cyanobacteria.»

Burleson identifies and analyzes toxins created by the «red tide» phenomena — an algal bloom that looks red or brown and can make oysters and shellfish toxic to eat.

Florida red tide is a harmful algal bloom produced by the dinoflagellate Karenia brevis that causes respiratory impairment in humans and marine life, and is responsible for shellfish poisoning.

«By studying both the proteins and metabolites, which interact to form metabolic pathways, we put together a picture of what's happening inside the competitor algal cells when they're extremely stressed.»

A new catalytic method for converting algal oil to gasoline - or jet - fuel - range hydrocarbons has been developed by the research group of Prof. Keiichi Tomishige and Dr. Yoshinao Nakagawa from Tohoku University's Department of Applied Chemistry, and Dr. Hideo Watanabe from the University of Tsukuba.