Sentences with phrase «hypoxic zones in»

One of the benefits of constructing these artificial wetlands was thought to be in cleaning and filtering polluted water, including mitigating the effects of excess fertilizer runoff, which has been contributing to hypoxic zones in the ocean.

The Black Sea once hosted one of the largest hypoxic zones in the world, stretching 15,000 square miles.

By 2017, excessive nitrogen from agriculture had created a hypoxic zone in the Gulf extending 22,729 square kilometers (8775.7 square miles)-- an area larger than the state of New Jersey.

«While there is some uncertainty regarding the size, position and timing of this year's hypoxic zone in the Gulf, the forecast models are in overall agreement that hypoxia will be larger than we have typically seen in recent years.»

Dysfunctional microbiomes are associated with issues including human chronic diseases such as obesity, diabetes, and asthma; local ecological disruptions such as the hypoxic zone in the Gulf of Mexico; and reductions in agricultural productivity.

Not exact matches

However, in order to come close to achieving a reduced target hypoxic zone of 5,000 square kilometers (1930.5 square miles) by 2050, nitrogen levels would have to be brought to zero — a scenario that the researchers note in their paper is «not only considered unrealistic, but also inherently unsustainable.»

Lothar Stramma, a physical oceanographer at the Christian Albrechts University of Kiel in Germany and his associates describe the hypoxic problem as global in a paper accepted for publication in Deep - Sea Research, stating that tropical low - oxygen zones have expanded horizontally and vertically around the world, and that subsurface oxygen has decreased adjacent to most continental shelves.

Two surveys conducted in June and early July, one of which was led by a NOAA - supported Texas A&M University team, suggested a large hypoxic zone was forming in the Gulf, though the LUMCON July measurement will be the official one as required of NOAA by the Task Force.

The hypoxic zone off the coast of Louisiana and Texas forms each summer threatening the ecosystem supporting valuable commercial and recreational Gulf fisheries that in 2011 had a commercial dockside value of $ 818 million and an estimated 23 million recreational fishing trips.

In 2014, sustained winds from Hurricane Arthur mixed Chesapeake Bay waters, delivering oxygen to the bottom and dramatically reducing the size of the hypoxic zone to 0.58 cubic miles.

Hypoxic (very low oxygen) and anoxic (no oxygen) zones are caused by excessive nutrient pollution, often from human activities such as agriculture, which results in insufficient oxygen to support most marine life in near - bottom waters.

The confirmed size of the 2013 Gulf hypoxic zone will be released in August, following a monitoring survey led by the Louisiana Universities Marine Consortium beginning in late July, and the result will be used to improve future forecasts.

The largest hypoxic zone measured to date occurred in 2002 and encompassed more than 8,400 square miles.

The Mississippi River / Gulf of Mexico Nutrient Management Task Force supports the goal of reducing the size of the hypoxic zone to less than 5,000 square kilometers, or 1,900 square miles, which will require substantial reductions in nitrogen and phosphorus reaching the Gulf.

This summer's hypoxic zone («dead zone») is one of the largest measured since the team of researchers from Louisiana Universities Marine Consortium and Louisiana State University began routine mapping in 1985.

This year's hypoxic zone, nearly the size of the state of Massachusetts, is right in the range predicted earlier in the year by the Louisiana Universities Marine Consortium, which does a yearly survey of oxygen levels.

The hypoxic zone forms in the middle of the most important commercial and recreational fisheries in the coterminous United States and could threaten the economy of this region of the Gulf.

Hypoxic areas, or «Dead Zones,» have increased in duration and frequency across our planet's oceans since first being noted in the 1970s.

The dead zone's return was discovered by oceanographers at Oregon State University, who deployed robotic underwater gliders and other monitoring devices over the past few months to assess oxygen levels in the water.They discovered that oxygen levels on reefs previously devastated by past dead zones had dropped to 0.5 mL / L by the end of June — a far cry from the 1.4 mL / L level considered to be hypoxic for most marine life.