Sentences with phrase «coastal dead zones»

And unlike coastal dead zones caused by human activity, which could recover if the activity that's causing the dead zone is controlled, the dead zones caused by global warming could remain for thousands of years.

Whereas some coastal dead zones could be recovered by control of fertilizer usage, expanded low - oxygen areas caused by global warming will remain for thousands of years to come, adversely affecting fisheries and ocean ecosystems far into the future.

While much research on the effects of shallow coastal dead zones has been published, little is understood on how this expansion will affect open ocean ecosystems.

Nitrogen run - off from fertilizers is causing coastal dead zones.

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.

Not exact matches

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.

Nutrient runoff may well be creating dead zones in coastal waters, but we can't just stop fertilizing our fields; global warming is a serious threat to coral reefs, but we can't just stop emitting greenhouse gases, and at this point it would probably be too late.

«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.»

Global dead zones dominated by jellyfish and microbes; coastal waters too toxic for aquaculture and human habitation.

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).

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.

Lastly, 400 dead zones have appeared in the world's productive coastal waters.

It is changing the composition of species in ecosystems, reducing soil fertility, depleting the ozone layer, intensifying climate change, and creating dead zones in the Gulf of Mexico and other near - coastal seas.

Dead zones are caused by several factors, particularly eutrophication where too many nutrients run off coastal cities and agricultural areas into rivers that carry these materials out to sea.

Managing local factors such as the input of nutrients into coastal regions can play an important role in reducing the rate at which dead zones are spreading across the world's oceans (high agreement).

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.

And out in the Atlantic Ocean, mobile dead zones now swirl providing a roving surface hazard to both the deep open waters and to the coastal regions that now sit in the firing line.

Increased levels of nitrogen entering coastal seas from activities such as fertiliser use are also creating dead zones close to shore.

«Dead zones and harmful algal blooms can kill fish, impact shellfish and other marine life, and put our coastal economy at risk.

Over 60 % of American coastal rivers and bays have been negatively impacted by phosphorus pollution, and there are currently at least 166 coastal «dead zones» in the United States.

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.

«Until now, a lack of information and monitoring has been a major impediment to understanding the extent and impacts of «dead zones» and eutrophication in coastal ecosystems,» said Mindy Selman, senior water quality analyst at WRI, in a press release.

In recent years, hundreds of thousands of small pasture - based dairies have disappeared, their production replaced by CAFOs (confined animal feeding operations)-- crowded industrial facilities that use methods linked to a variety of health and environmental problems, from antibiotic resistance to «dead zones» in coastal waterways.