Sentences with phrase «waters of the dead zone»

The low - oxygen waters of the dead zone in the Gulf of Mexico result in smaller shrimp, and a spike in large shrimp prices.

Not exact matches

We continue to pour on the nitrogen, even as scientists report the existence of 50 «dead zones» where nitrogen has flowed from fields to water, and resulted in an excess of plant growth, a depletion of oxygen and the extinction of life.

The turbid, nutrient - rich waters enter the Gulf of Mexico, where, every summer, one of the world's largest «dead zones» appears off the coasts of Louisiana and Texas.

Yet in waters from the Sea of Japan (aka East Sea) to the Black Sea, jellies today are thriving as many of their marine vertebrate and invertebrate competitors are eliminated by overfishing, dead zones and other human impacts.

When this water, called submarine groundwater discharge (SGD), trickles through contaminated soil and rock, it can pick up and transport a variety of ions, nutrients, and chemicals to the sea — including pollutants that contribute to coastal dead zones and toxic algal blooms.

They're different from the so - called dead zones that form at the mouths of rivers whose polluted waters prompt algal blooms.

«Similar to the «dead zone» nowadays spreading in the Gulf of Mexico, the soil crisis could have caused a worldwide expanse of uninhabitable low - oxygen conditions in shallow waters,» explains team member Henk Visscher of Utrecht University in the Netherlands.

Jellyfish are among the only living things to thrive in the oxygen - starved waters of expanding dead zones.

These deplete the water of oxygen and lead to «dead zones» devoid of life.

Scientists have long known that nitrate - loaded fertilizers run off from farms and city streets into bodies of water, sometimes creating giant «dead zones» hundreds of miles downstream.

Eventually, the fertilizing effects of these nutrients in surface waters can fuel the growth of algae that ultimately suck most of the oxygen out of large patches of coastal waters, creating what are colloquially termed dead zones (see Limiting Dead Zondead zones (see Limiting Dead Zozones (see Limiting Dead ZonDead ZonesZones).

A new study led by researchers at the Virginia Institute of Marine Science reveals that land use in the watersheds from which this «dissolved organic matter» originates has important implications for Bay water quality, with the organic carbon in runoff from urbanized or heavily farmed landscapes more likely to persist as it is carried downstream, thus contributing energy to fuel low - oxygen «dead zones» in coastal waters.

The researchers undertook the study in light of concerns about decreasing levels of oxygen in coastal waters worldwide, and how the growing prevalence of low - oxygen «dead zones» might affect populations and management of blue crabs and other coastal marine life.

Scientists with the U.S. Geological Survey, the Illinois - Indiana Sea Grant and partners recently found that dead zones caused by hypoxia, the depletion of oxygen in water, are unexpectedly variable in Lake Erie, sometimes disappearing and reemerging elsewhere in the matter of hours.

The lower oxygen levels can result in fish deaths, a loss of biodiversity in the waters, and dead zones.

The Chesapeake dead zones, which have been highly variable in recent years, threaten a multi-year effort to restore the Bay's water quality and enhance its production of crabs, oysters, and other important fisheries.

The causes are all human: overfishing wiping out key species, warmer waters from a warming world, dying coral which supported millions of species, pollution like fertilizers causing deadly algae blooms and dead zones,...

A dead zone in the Chesapeake Bay also has shrunk in recent years, Magnien said, because of major advances in wastewater treatment, sediment and storm water controls, soil management practices, and more selective and precise applications of fertilizer.

«However, combined effects of nutrient loading and climate change are greatly increasing the number and size of «dead zones» in the open ocean and coastal waters, where oxygen is too low to support most marine life.»

And that is an awful lot of land, with intensive agriculture being one of the driving forces for the loss of biodiversity, for nutrient overload of the seas (those dead zones of algae bloom), fresh water pollution and soil erosion.

The water of the 20,000 - kilometer (7,728 - square - mile) Dead Zone, extending from the mouth of the Mississippi River Basin to beyond the Texas border, has so little oxygen that essentially no marine life exists.

dead zone An area of open water where oxygen levels are so low that oxygen - dependent organisms can not live.

NOAA's National Ocean Service has been funding investigations and forecast development for the dead zone in the Gulf of Mexico since 1990, and oversees national hypoxia research programs which include the Chesapeake Bay and other affected bodies of water.

The way manufacturers get around the problem of the wet is usually through creating a dead zone where the water will fall out of suspension, then the water is collected and allowed to drain through a tube out onto the ground.

Areas of the coastal ocean where oxygen is low or absent in bottom waters, so - called dead zones, are expanding worldwide (Diaz and Rosenberg, 2008).

The United States has trimmed excess fertilizer use since a peak in the 1990's, the scientists write, but runoff and releases from livestock operations still create big water problems, most notably the Gulf of Mexico «dead zone» resulting from nutrients washing from fields and livestock around the Mississippi River watershed.

However, if one considers the enormous increase of reactive nitrogen in our biosphere, due to the use of synthesized fertilizer and the burning of fossil fuels, its impact is not part of the analysis, even tough this increase shows up in the eutrophication (nutrient enrichment) of open waters all over the world, resulting in excess algae, in some areas causing large algae blooms (as where they are going to hold the sailing regattas during the Olympics), red tides and dead zone, as the 8000 square mile dead zone in the Gulf of Mexico.

And excess nitrogen fertilizer applied to the fields of feed corn grown to satisfy the world's livestock runs off into streams and rivers, sometimes flowing to coastal waters where it creates large algal blooms and low - oxygen «dead zones» where fish can not survive.

Warmer water holds less oxygen, and the researchers found that 94 percent of the world's dead zones are in areas expected to see a temperature rise of 2 degrees Celsius or more by the end of the century.

Natural processes, such as the churning of ocean waters, can form dead zones on their own.

Blooms also remove oxygen necessary for animal life from the water, creating massive «dead zones» — areas where the oxygen is so low that the water is inhospitable to life, suffocating large amounts of fish and crustaceans.

Agricultural runoff, in combination with increased water temperatures, has caused considerable non-point source pollution problems in recent years, with increased phosphorus and nitrogen loadings from farms contributing to more frequent and prolonged occurrences of anoxic «dead zones» and harmful, dense algae growth for long periods.

They report in Environmental Research Letters that they examined 740 different production systems for 90 different foods, to calculate levels of land use, greenhouse gas emissions (GHGs), fossil fuel energy use, the nutrient runoff that leads to eutrophication or «dead zones» in lakes and rivers, and the potential for acidification of the waters.

Climate change can influence the distribution of dead zones by increasing water temperature and hence microbial activity, as well as reducing mixing of the ocean (i.e., increasing layering or stratification) of the Ocean — which have different temperatures, densities, salinities — and reducing mixing of oxygen - rich surface layers into the deeper parts of the Ocean.

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.

Dead zones — massive stratified columns of oxygen - deprived water — could become the new normal in oceans around the world as global temperatures continue to rise.

The dead zones were created in large areas of swirling water known as eddies, which form when two or more currents collide.

While dead zones are not uncommon near inhabited coastlines, where industrial runoff can trigger algae blooms that suck all of the oxygen out of the water, they're now popping up in places scientists didn't expect — in the open Atlantic Ocean.

The effects on the world around us are also negative — excessive use of water, sewage lagoons that pollute ground water and dead zones in the ocean from animal waste.

Dead zones form when excessive amounts of nitrogen and phosphorous wash into waterways and spur algal blooms, depleting the water of oxygen and killing fish, shrimp, and other marine life.

When water loses most of its oxygen, it creates areas referred to as «dead zones,» where most marine plants and animals can not survive.

Carbon absorption can initiate a feedback loop in which underoxygenated waters breed different kinds of microbes that turn the water still more «anoxic,» first in deep ocean «dead zones,» then gradually up toward the surface.

When these organisms die and decay, they deplete oxygen levels, creating «dead zones» of hypoxic, or oxygen poor, water.

Phosphorus is the biggest cause of water quality degradation worldwide, causing «dead zones», toxic algal blooms, a loss of biodiversity and increased health risks for the plants, animals and humans that come in contact with polluted waters.

But it is worth noting that though the Fish & Wildlife Dept. has ruled this fish kill a result of natural causes, the Gulf of Mexico has a severe problem with marine dead zones, as New Scientist explains: «Summer dead zones are common in the Gulf of Mexico, caused by the large amounts of fertiliser that get flushed down the Mississippi river, which triggers a dramatic drop in the amount of oxygen dissolved in the water.»

Pollution that impacts corals stems from a range of sources, including agricultural run - off — the fertilizer from which can cause algae blooms that result in dead zones — stormwater run - off from roads and urban areas into coastal waters, and poorly managed wastewater treatment plants that allow effluent to enter the waterways.

As bacteria begins to devour the oil in the plumes, they could leave behind huge swaths of water with little oxygen — massive dead zones that would suffocate any life within them.

A new analysis of 60 years worth of water quality data, however, suggests that efforts to control the nutrients are leading to smaller and shorter - lived dead zones.

The muddy brown color of the Long Island Sound and the growing dead zones in the Chesapeake Bay are the direct result of inadequate water filtration — a job that was once carried out by menhaden.

Fertilizer Pollution / Dead Zones: Factory farming deposits high amounts of nitrogen, phosphorous, and other fertilizers, which end up in drinking water, and is also linked to decreasing grassland biodiversity.