News

8/17/10

Federal scientists have confirmed a California agency's findings that the sediment trapped behind four Klamath River dams is largely uncontaminated, a critical determination if the removal of those dams is to go forward.

The U.S. Interior Department's preliminary review of the muck behind the dams found that there would be no human health risk due to contact with the sediment if it were to be released downstream when the dams are razed. PCBs, trace metals and dioxins were found only at low levels, according to data in the report.

The findings confirm a 2006 California Coastal Conservancy study that found the 11.5 to 15.3 million cubic yards of sediment behind the dams is mostly very fine, organic material that had low levels of contamination.

”As far as I'm concerned it's good news for people, the environment and everybody,” said U.S. Geological Survey Program Manager Dennis Lynch, who is heading up the effort to collect information that will inform the U.S. interior secretary on whether removing the dams is in the public interest.

Had the sediment been found to be heavily contaminated, it almost certainly would have doomed efforts to remove the dams. A project that would have drained reservoirs and dredged out toxic mud for shipping to a certified landfill is believed to be far too costly. 

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August 2010

As the world's oceans are degraded, will they be dominated by jellyfish?

On the night of December 10, 1999, the Philippine island of Luzon, home to the capital, Manila, and some 40 million people, abruptly lost power, sparking fears that a long-rumored military coup d’état was underway. Malls full of Christmas shoppers plunged into darkness. Holiday parties ground to a halt. President Joseph Estrada, meeting with senators at the time, endured a tense ten minutes before a generator restored the lights, while the public remained in the dark until the cause of the crisis was announced, and dealt with, the next day. Disgruntled generals had not engineered the blackout. It was wrought by jellyfish. Some 50 dump trucks’ worth had been sucked into the cooling pipes of a coal-fired power plant, causing a cascading power failure. “Here we are at the dawn of a new millennium, in the age of cyberspace,” fumed an editorial in the Philippine Star, “and we are at the mercy of jellyfish.”

8/2/10 The world’s “peak fish” point came in the late nineteen-eighties, but no one noticed.

At one time, Atlantic bluefins were common from the coast of Maine to the Black Sea, and from Norway to Brazil. In the Mediterranean, they have been prized for millennia—in an ode from the second century, the poet Oppian describes the Romans catching bluefins in “nets arranged like a city”—but they are unusually bloody fish, and in most of the rest of the world there was little market for them. (Among English speakers, they were long known as “horse mackerel.”) As recently as the late nineteen-sixties, bluefin in the United States sold for only a few pennies a pound, if there were any buyers, and frequently ended up being ground into cat food. Then, in the nineteen-seventies, the Japanese developed a taste for sushi made with bluefin, or hon-maguro. This new preference, it’s been hypothesized, arose from their exposure, following the Second World War, to American-style fatty foods. The taste for hon-maguro was, in turn, imported back to the U.S. Soon, fishing for bluefin became so lucrative that the sale of a single animal could feed a family for a year. (Earlier this year, a five-hundred-pound Pacific bluefin went for an astonishing three hundred and forty dollars a pound at a Tokyo fish auction.) First, the big bluefins were fished out, then the smaller ones, too, became hard to find. Tuna “ranching,” a practice by which the fish are herded into huge circular nets and fattened up before slaughter, was for a time seen as a solution until it was shown to be part of the problem: as fewer bluefins were allowed to reach spawning age, there were fewer and fewer new fish to fatten.

Read Kolbert's review of two books on the state of the world's fisheries:

"Saved by the Sea: A Love Story With Fish" by David Helvang and

"Managed Annihilation: An Unnatural History of the Newfoundland Cod Collapse" by Dean Bavington.

8/4/10

The amount of water pumped out of the Sacramento-San Joaquin River Delta would have to be cut in half if vulnerable fish populations are going to be preserved for future generations, a state report declared Tuesday.

The 190-page study by the State Water Resources Control Board is nonbinding, but it could shape how communities from the Bay Area to San Diego divvy up California's most precious resource.

The document, issued by the five-member board after nine months of scientific study, determined that 75 percent of runoff from snowpack and rainfall would need to funnel through the delta to San Francisco Bay and the ocean in order to sustain the estuary's most important wildlife and habitats, known in legal parlance as "public trust" resources.

Right now, about 50 percent of the state's runoff flows through the delta all the way to the ocean. The other 50 percent goes to cities and farms. Raising the flow into the ocean from 50 percent to 75 percent would require taking away roughly half of what cities and farms now get, according to the report.

"The board has finally put to rest the argument about whether the delta needs more water," said Cynthia Koehler, water legislative director with the Environmental Defense Fund. "You can't divert 50 percent of the flows and think the fish and ecosystem are going to be just fine."

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