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Latest

 

Sport fish contaminated along California's urban coastline

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Tony Barboza, Los Angeles times
Latest
Created: 28 May 2011

5/26/11

 

Mercury and PCBs contamination is widespread in sport fish in urban coastal waters across California, though mostly in moderate concentrations, a survey released Thursday by the state Water Board found.

Nineteen percent of the urban coastline sampled by researchers had fish with mercury in such high concentrations that they shouldn’t be eaten by young women and children. Fourteen percent of locations had similarly elevated levels of PCBs.

The findings are part of the largest statewide survey to date of contaminants in sport fish along the California coast. The report was based on the first year of a two-year survey, which examined more than 2,000 fish from three dozen species gathered in 2009 from waters near Los Angeles and San Francisco, including San Francisco Bay.

Researchers said the study highlights the health problem of lingering mercury, a poisonous metal that is found in fish globally, and PCBs, toxic chemicals the United States banned in the 1970s. Both substances continue to pose a risk to people who eat fish caught on the California coast because they can lead to nervous system damage and developmental problems in children and can cause cancer, liver damage and reproductive harm.

“Unfortunately, we're not seeing many areas that are totally clean,” said Jay Davis, a senior scientist for the San Francisco Estuary Institute and lead author of the study. But a catalog of where and in what fish the toxins abound should help anglers make better choices, he said. “With good information, people can reduce their exposure significantly.”

Sharks had some of the highest levels of mercury because of their unusual tendency to accumulate the contaminants in their flesh, researchers said. The most elevated concentrations of the pollutants were found in San Francisco Bay and San Diego Bay.

As for which species is the safest: Southern California anglers can be rest easy catching and eating chub mackerel because it had the lowest levels of contamination in the survey.

The results of the survey were used in part to help craft new fish consumption guidelines issued earlier this week for anglers in San Francisco Bay -- the first update there by state health officials in 17 years. The advisory identifies shiner perch and other surf perches as unsafe to eat in any quantity and warns young women and children not to eat white sturgeon, striped bass and sharks caught in the bay.

The buildup of metals and other chemicals in fish is such a problem along the Southern California coast that health officials two years ago expanded the number of fish on the "do not eat" list from one to five species because of high levels of PCBs, mercury and the banned pesticide DDT.

Next year the state is expected to release the next portion of the survey: data on fish collected from the less populated central and north coasts. After that, researchers will show test results from fish in rivers and streams.

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Oroumieh Lake, Iran's Largest, Turning To Salt

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Huffington Post
Latest
Created: 25 May 2011

OROUMIEH LAKE, Iran (AP) -- From a hillside, Kamal Saadat looked forlornly at hundreds of potential customers, knowing he could not take them for trips in his boat to enjoy a spring weekend on picturesque Oroumieh Lake, the third largest saltwater lake on earth.

"Look, the boat is stuck... It cannot move anymore," said Saadat, gesturing to where it lay encased by solidifying salt and lamenting that he could not understand why the lake was fading away.

The long popular lake, home to migrating flamingos, pelicans and gulls, has shrunken by 60 percent and could disappear entirely in just a few years, experts say - drained by drought, misguided irrigation policies, development and the damming of rivers that feed it.

Until two years ago, Saadat supplemented his income from almond- and grape-growing by taking tourists on boat tours. But as the lake receded and its salinity rose, he found he had to stop the boat every 10 minutes to unfoul the propeller - and finally, he had to give up this second job that he'd used to support a five-member family.

"The visitors were not enjoying such a boring trip," he said, noting they had to cross hundreds of meters of salty lakebed just to reach the boat from the wharf.

Other boatmen, too, have parked their vessels by their houses, where they stand as sad reminders of the deep-water days. And the lake's ebbing affects an ever-widening circle.

In April, authorities stopped activities at the nearby jetty in Golmankhaneh harbor, due to lack of water in the lake, now only two meters deep at its deepest. Jetties in Sharafkhaneh and Eslami harbors faced the same fate.

The receding water has also weakened hotel business and tourism activities in the area, and planned hotel projects remain idle since investors are reluctant to continue.

Beyond tourism, the salt-saturated lake threatens agriculture nearby in northwest Iran, as storms sometimes carry the salt far afield. Many farmers worry about the future of their lands, which for centuries have been famous for apples, grapes, walnuts, almonds, onions, potatoes, as well as aromatic herbal drinks, candies and tasty sweet pastes.

"The salty winds not only will affect surrounding areas but also can damage farming in remote areas," said Masoud Mohammadian, an agriculture official in the eastern part of the lake, some 370 miles (600 kilometers) northwest of the capital Tehran.

Other officials echoed the dire forecast.

Salman Zaker, a parliament member for Oroumieh warned last month that, "with the current trend, the risk of a salt tsunami is increasing." Warning that the lake would dry out within three to five years - an assessment agreed to by the local environment department director, Hasan Abbasnejad - Zaker said eight to 10 billion tons of salt would jeopardize life for millions of people.

Masoud Pezeshkian, another lawmaker and representative for city of Tabriz in the eastern part of the lake said, "The lake has been drying but neither government nor local officials took any step, so far."

How did this disaster develop, and what can be done now?

Official reports blame the drying mainly on a decade-long drought, and peripherally on consumption of water of the feeding rivers for farming. They put 5 percent of the blame on construction of dams and 3 percent on other factors. Others disagree about the relative blame.

The first alarm over the lake's shrinking came in late 1990s amid a nagging drought.

Nonetheless, the government continued construction of 35 dams on the rivers which feed the lake; 10 more dams are on the drawing boards for the next few years.

Also completed was a lake-crossing roadway between Oroumieh and Tabriz, cities on the west and east of the lake. No environmental feasibility study was done in the planning for the road, and environmentalists believe the project worsened the lake's health by acting as a barrier to water circulation.

Nasser Agh, who teaches at Tabriz Sahand University, suggested miscalculations led to late reaction to save the lake. "Experts believed it would be a 10-year rotating drought, at first," he said. But long afterward, the drought still persists, with devastating effects.

In the early 2000s, academic research concluded that the lake could face the same destiny as the Aral Sea in Kazakhstan and Uzbekistan, which has been steadily shrinking since rivers that feed it were diverted by Soviet Union irrigation projects in 1960s. It is now less than one-tenth of its original size.

In April, the Iranian government announced a three-prong effort to save the lake: a cloud-seeding program to increase rainfall in the area, a lowering of water consumption by irrigation systems, and supplying the lake with remote sources of water.

Mohammad Javad Mohammadizadeh, vice-president to President Mahmoud Ahmadinejad in charge of environmental affairs, said the government approved the three-part approach.

Some experts termed the weather control portion of the program as only a "symbolic action" by government, saying the best answer would be to release more water currently being held back by dams. The evaporation rate has been three times the rainfall rate, making the rivers' historic role vital to sustaining the lake.

"The lake is in such a misery because of the dams," Ismail Kahram, a professor in Tehran Azad University and a prominent environmentalist, told The Associated Press. Three-fifths of the lake has dried up and salt saturation has reached some 350 milligrams per liter from 80 milligrams in 1970s, he said.

Kahram said the government should allow 20 percent of the water from the dams to reach the lake.

Mostafa Ghanbari, secretary of the Society for Savior of the Lake Oroumieh, believes transferring water from the Caspian Sea may be "the only way to save" the lake. But such a project would be ambitious, requiring the pumping of water some 430 miles (700 kilometers), from a body of water at considerably lower elevation.

In the green and beautiful city of Oroumieh, famous for peaceful coexistence between Azeri people, Kurds, Armenians, Assyrians as well as Muslims and Christians, talk about the fate of the lake is common among ordinary people in teahouses and on the streets.

Many express happiness with the government decision to manipulate clouds in hopes of increasing rainfall.

"It is a good decision. Every evening I look at the dark clouds that are coming and I tell my family soon there will be rain," and on some nights there have been showers, said Masoud Ranjbar, a taxi driver.

However, Eskandar Khanjari, a local journalist in Oroumieh, called the cloud-seeding plan "a show." He said recent rainfall was only seasonal, as predicted by meteorologists.

Scoffing at the promises of officials and what he called "non-expert views," he said of efforts to save the lake: "It seems that people have only one way; to pray for rain."

Beyond the debates by national and local authorities some folks here suggest another way Oroumieh could be saved.

A local legend says wild purple gladiolas have had a miraculous role in doing just that. The flowers have grown every year for a thousand years in the spot where a princess of Oroumieh was killed as she warned the people of the city about an invading enemy.

As a recent sunset turned the lake golden, Kamal the boatman tried to find some hope in the returning blossoms.

"You see, still wild purple gladiolas are appearing in the spring," he said. "The city and its lake can eventually survive."

 

 

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Assembly votes to prohibit sale of shark fins

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AP
Latest
Created: 23 May 2011

The state Assembly came to the defense Monday of endangered sharks targeted by fishermen who amputate their fins then toss the live sharks back into the ocean.

The Assembly approved AB376, which bans the sale, trade or possession of shark fins, a delicacy that costs hundreds of dollars a pound and is used to create a soup that is popular among some Asians.

The bill passed 63-8 with bipartisan support and opposition. Its author, Assemblyman Paul Fong, D-Cupertino, and other supporters say the sharks are mutilated and the practice puts them at risk of extinction, which would wreak havoc on underwater ecosystems.

Assemblyman Jared Huffman, D-Marin, who co-authored the bill, said shark populations have been on the decline for two decades.

"The science is unambiguous: Sharks are in trouble," he said.

Critics of the bill countered that there are sufficient federal protections in place.

Finning is illegal in U.S. waters, but lawmakers can do nothing about the practice in international waters. Huffman said that's why they went after the market for shark fins in California, which has the highest demand for shark fins outside Asia.

Oregon is taking up a similar measure, as is China, Huffman added.

Shark fin soup can cost $80 a bowl, while shark fins can sell for $600 a pound. Advocates say the finning industry kills 73 million sharks each year.

AB376 touches on a politically and culturally sensitive debate, because some Asian groups have been eating the soup for millennia to mark special occasions. The controversy has drawn the likes of Chinese basketball star Yao Ming to publicly support outlawing use of the fins.

Some opponents say said the legislation goes too far in dictating what Californians can eat.

"This bill would be the first bill to ban a California food product," said Assemblywoman Fiona Ma, D-San Francisco, who voted against it.

Others said the legislation doesn't go far enough, because the rest of the shark can still legally be sold in California if its fins are removed.

Fong responded that 95 percent of shark meat is worthless, so his bill focuses on the body part most coveted by fishermen.

He amended the bill last week to give businesses an extra year to comply, but Assemblyman Mike Eng, D-Monterey Park, said it still hurts small business.

The legislation, which would take effect Jan. 1, 2013, now goes to the Senate for consideration.

 

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California Coastal Conservancy grants $2 million to Salt River project

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Donna Tam, Times Standard
Latest
Created: 20 May 2011

5/20/11

The California Coastal Conservancy approved $2 million in grants for the Salt River restoration project Thursday, allowing decades of planning to commence later this summer.

First District Supervisor Jimmy Smith said the funding -- which consists of $1million from the U.S. Fish and Wildlife Service and $1 million from the conservancy's fund -- is one of the last pieces of the puzzle for the project.

”Today's decisions by the Coastal Conservancy puts us in the position to actually, physically work on the project, and that's a huge, huge step,” Smith said after a meeting at the conservancy's office in Oakland.

With the county's tightening budget, Smith said he and his wife decided to pay for their own travel expenses so that he could thank the conservancy governing board and its staff in person. The board also approved up to $315,000 in funding to acquire a 36-acre property for Martin Slough restoration work, and up to $15,000 for preliminary designs for the Big Lagoon County Park access enhancement project.

The Salt River project is being carried out by the Humboldt County Resource Conservation District, or HCRCD, and is estimated to cost between $12 million to $16 million.

According to a conservancy's staff report, the conservancy has been involved with the project since the late 1980s. The source of the conservancy's grant funding comes from Proposition 84 bond funding related to water quality and supply, as well as flood control, and river and coastal protection.

The project restores the Salt River channel, floodplain and marshland, while also managing the sediments gathered in the river bed.

If the Salt River is restored, it would also help move the water flow for Ferndale's wastewater treatment plant.

The first phase of the project, which involves wetland and upland restoration work on the 440-acre Riverside Ranch property and some channel excavation, is scheduled to begin late this summer and continue into next year. Phase two, which includes channel excavation and restoration, would begin in 2012.

 

 

Salt River Ecosystem Restoration Project:

The project restores the Salt River channel, floodplain and marshland, while also managing the sediments gathered in the river bed. The first phase of the project, which involves wetland and upland restoration work on the 440-acre Riverside Ranch property and some channel excavation, is scheduled to begin late this summer and continue into next year. Phase two, which includes channel excavation and restoration, would begin in 2012.

 

Martin Slough restoration work:

Conservancy funding allows the Northcoast Regional Land Trust to acquire a 36-acre property in the Elk River watershed for the purpose of protecting, restoring and enhancing wetlands, water quality and fish and wildlife habitat while protecting and enhancing coastal agriculture. The property, which is currently used for grazing, is located on Pine Hill Road at the confluence of Martin Slough and Swain Slough.

 

Big Lagoon access enhancement project:

The project aims to enhance public access at Big Lagoon County Park that will improve compliance with Americans with Disabilities Act standards and reduce impacts to the Yurok Village site O-puyweg. Work will include campground improvements, the decommissioning of a road, trail creation and the installation of a boat wash station. 

 

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Third of Tested Plastic Products Found to Leach Toxic Substances in Swedish Study

Details
Science Daily News
Latest
Created: 18 May 2011

Many plastic products contain hazardous chemicals that can leach to the surroundings. In studies conducted at the University of Gothenburg, a third of the tested plastic products released toxic substances, including 5 out of 13 products intended for children.

"Considering how common plastic products are, how quickly the production of plastic has increased and the amount of chemicals that humans and the environment are exposed to, it is important to replace the most hazardous substances in plastic products with less hazardous alternatives," says Delilah Lithner of the Department of Plant and Environmental Sciences at the University of Gothenburg.

Plastics exist in many different chemical compositions and are widespread in the society and the environment. Global annual production of plastics has doubled over the past 15 years, to 245 million tonnes in 2008. The plastic polymers are not regarded as toxic, but there may be toxic residual chemicals, chemical additives and degradation products in the plastic products that can leach out as they are not bound to the plastic polymer. Plastics also cause many waste problems.

In her research, Lithner studied the toxicity of 83 randomly selected plastic products and synthetic textiles. The newly purchased products were leached in pure (deionised) water for 1-3 days. The acute toxicity of the water was then tested using water fleas (Daphnia magna).

"A third of all the 83 plastic products and synthetic chemicals that were tested released substances that were acutely toxic to the water fleas, despite the leaching being mild. Five out of 13 products that were intended for children were toxic, for example bath toys and buoyancy aids such as inflatable armbands," says Delilah Lithner.

The products that resulted in toxic water were soft to semi-soft products made from plasticised PVC or polyurethane, as well as epoxy products and textiles made from various plastic fibres. The toxicity was mainly caused by fat-soluble organic substances.

Lithner also studied the chemicals used to make around 50 different plastic polymers and has identified the plastic polymers for which the most hazardous chemicals are used. They were then ranked on the basis of the environmental and health hazard classifications that exist for the chemicals. Examples of plastic polymers made from the most hazardous chemicals are certain polyurethanes, polyacrylonitriles, PVC, epoxy and certain styrene copolymers. The results are of great benefit for further assessing environmental and health risks associated with plastic materials.

The thesis Environmental and health hazards of chemicals in plastic polymers and products was successfully defended in public on 6th May 2011.

 

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More Articles …

  1. The wetlands that time forgot
  2. Foreign Species Invade San Francisco Bay
  3. A Stronger and Clearer Clean Water Act
  4. Santa Clara County supervisors ban plastic bags
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