Sentences with phrase «by algal blooms»

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.

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.

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.

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.

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.

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.

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

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.

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.

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.

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

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.

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.

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.

SEE ALSO Algal Blooms, Harmful; Algal Blooms in the Ocean; Carbon Dioxide in the Ocean and Atmosphere; El NiÑo and La NiÑA; Food from the Sea; Life in Extreme Water Environments; Human Health and the Ocean; Human Health and Water; Ocean Biogeochemistry; Ocean Currents; Plankton; Pollution by Invasive Species; Pollution of the Ocean by Sewage, Nutrients, AND Chemicals.

I'm quite intrigued by their one about manufacturing urea to feed into the oceans to seed algal blooms, which somewhat goes against what I've read about the problems we're storing up synthesising nitrogen fertilizers.

These findings support the hypothesis that sporadic ALS (sALS) can, in part, be triggered by environmental water - quality indicators and lake conditions that promote harmful algal blooms.

Spatiotemporal changes in the genetic diversity of harmful algal blooms caused by the toxic dinoflagellate

Phosphorus pollution causing algal blooms in Lake Erie alone has reduced the lake's tourism value by $ 4 billion; shoreline properties by another $ 700 million.

With a rapidly changing climate, warmer weather, more intense rainfall, and pollution caused by human activity, we are perpetuating optimal conditions for harmful algal blooms.

Ocean Champions Endorses Senator Rob Portman (R - OH) Cosponsored harmful algal bloom legislation in Senate — Ocean Champions» # 1 Legislative Priority Washington, D.C. — March 24, 2016 — Ocean Champions, which works to build political power for the oceans and lakes by helping to elect pro-ocean...

Death by Algae Under the right conditions — warm water and a boost of nutrients — algae can grow so explosively that those toxins become a problem, creating what's called a harmful algal bloom, or HAB.

The warming is expected to increase algal blooms, and to mean global methane emissions will rise by 4 % over the next decade.

Harmful algal blooms don't just wreak havoc by causing oxygen - starved dead zones, they have the potential to be toxic to humans, land animals and aquatic life.

«Toxic or harmful algal blooms are not a new phenomenon, although many people may know them by other names such as red tides.

The impacts of harmful algal blooms (HABs) in the Great Lakes are being assessed using a range of economic metrics capturing the loss of services provided by the lakes (e.g. increased drinking water treatment costs, property value losses, beach closures), as well as the direct effects of toxic microcystin on public health (Bingham et al 2015, IJC 2013)-- such events are expected to increase in frequency and severity in a changing climate (Michalak et al 2013).

Geoengineering aims to cool the Earth by methods including spraying sulphate aerosols into the stratosphere to reflect sunlight, or fertilising the oceans with iron to create carbon - capturing algal blooms.

These warming spikes could be due to methane hydrate releases, or to global eutrophication caused by a hyperactive hydrological cycle, which might cause algal blooms on a global scale.

Anna Michalak's team combined sampling and satellite - based observations of Lake Erie with computer simulations and determined that the 2011 record - breaking algal bloom in the lake was triggered by long - term agricultural practices coupled with extreme precipitation, followed by weak lake circulation and warm temperatures.