
Este site dedica-se às aves e a relação com o Homem. O canto do Canário Timbrado, Canário Harz Roller, do canário Malinois e outros canários.. O objectivo de site é contar as aventuras e os arcos de descobertas relacionados com Homem e as aves. This site is dedicated to birds.singing canaries song,canaries,canaries de chant. carmelita=carmelo=jardim
Mostrar mensagens com a etiqueta l´Homme et les oiseuax. Mostrar todas as mensagens
Mostrar mensagens com a etiqueta l´Homme et les oiseuax. Mostrar todas as mensagens
18 de fevereiro de 2014
9 de janeiro de 2014
Nature Enthusiasts Help Foster an Economic Revival in Portugal
FIGUEIRA
DE CASTELO RODRIGO, Portugal — On a rainy winter morning, Antonio
Mónteiro and two colleagues were pushing and pulling an ailing,
reluctant bull along a stony track in the Faia Brava nature reserve in
northeast Portugal.
Suddenly, Mr. Mónteiro pointed up. “Look! Africa!” he said.
A
dozen or so griffon vultures, huge birds with white heads and tawny
wings, were wheeling like hang gliders in the gray sky above the
boulder-strewn scrubland.
It
was to protect these magnificent birds and other rare and threatened
raptors like the golden and Bonelli’s eagles that Mr. Mónteiro and his
wife, Ana Berliner, both wildlife biologists, began about 15 years ago
to piece together Faia Brava, or “wild cliff” in Portuguese.
They
started in 1999 by buying for 10,000 euros a 20-hectare, or 49-acre,
parcel of rocky crags where the birds nest above the Côa River. With
very little money, they have amassed about 800 hectares in a
five-kilometer, or three-mile, stretch along the river. Today, an
organization of seven people, in addition to Mr. Mónteiro and Ms.
Berliner, aid the effort, and a variety of visitors come to observe the
creatures.
Protecting
the birds remains a top goal, but their conservation effort has grown
into something bigger that has the potential to bring even more people
and jobs to a poor region badly in need of both.
The
farm villages in the area, with their stone houses and narrow streets,
are picturesque but dying as their inhabitants age and their children
look for work in Portugal’s big cities or abroad.
Few
people want to try to eke out an existence from cereal crops and olive
trees planted in tiny patches of soil. The economic crisis, which
continues to hit Portugal hard, is making life even tougher.
“We are in the middle of a generational crisis that is more than an economic crisis,” Mr. Mónteiro said.
Whatever
it is, a small group of what may be called environmental entrepreneurs,
like Mr. Mónteiro and Ms. Berliner, are taking advantage of it to bring
a new vision and energy to the Côa Valley.
Many
are university-educated young people from Lisbon, Portugal’s capital,
or Porto, the second-largest city, who are attracted to the countryside
or want to get away from the urban rat race.
While
the hilly, near-desert terrain may be hell for small farmers, it is an
unspoiled heaven for those who appreciate it. Along with the spectacular
birds, there is a wealth of prehistoric rock carvings and medieval
castles. And the Côa River runs into the Douro River, whose valley is a
wine-lover’s destination.
7 de outubro de 2013
4 écoles différentes: de l'école secondaire du Grand-Coteau, de l'école secondaire de Chambly, l'école secondaire du Méandre à l'Annonciation, de l'école secondaire Marguerite-De Lajemmerais
3 de outubro de 2013
no comments
‘Alarming’ presence of radioactivity found by Pennsylvania fracking wastewater study
Researchers have found high levels of radioactivity, salts, and metals in water and sediment located downstream from a treatment facility which processes fracking wastewater from oil and gas production sites in Pennsylvania’s Marcellus shale formation.
A Duke University team analyzed water and sediment samples from the Josephine Brine Treatment Facility in Indiana County, Pennsylvania, finding radium levels 200 times greater than samples taken upstream from the plant and far higher than what’s allowed under the Clean Water Act.
Radium is a radioactive metal that can cause diseases like leukemia and other ill-health effects if one is exposed to large amounts over time.
The treatment facility processes flowback water - highly saline and radioactive wastewater that resurfaces from underground after being injected into rocks in the fracking, or hydraulic fracturing, process.
Fracking is the extraction of oil and gas by injecting water to break rock formations deep underground. Use of the process has increased rapidly in the US in recent years, yet scientists who have studied the practice warn of climate-damaging methane emissions and radioactive effects that come with it.
The study was published Wednesday in the Environmental Science and Technology journal. It focuses on two years of tests on wastewater flowing through Blacklick Creek from oil and gas production sites in western Pennsylvania’s Marcellus shale formation.
For two years, the Duke team monitored sediment and river water above and below the treatment plant, as well as discharge coming directly from the plant, for various contaminants and levels of radioactivity. In the discharge and downstream water, researchers also found high levels of chloride, sulphate, and bromide, which can interact with chlorine and ozone - used to disinfect river water for drinking -to create a toxic byproduct.
“The treatment removes a substantial portion of the radioactivity, but it does not remove many of the other salts, including bromide,” said study co-author Avner Vengosh, a Duke professor of geochemistry, adding that traditional facilities like Brine aren’t made to remove these contaminants.
Though the Brine treatment facility strips some radium from fracking wastewater, high levels of metal still accumulate in sediment.
"The occurrence of radium is alarming - this is a radioactive constituent that is likely to increase rates of genetic mutation" and can be "a significant radioactive health hazard for humans," said William Schlesinger, a researcher and president of the Cary Institute of Ecosystem Studies, who wasn't involved in the study.
Researchers believe the contaminants come from fracking sites because the Brine facility treats oil and gas wastewater which has the same chemical features as rocks in the Marcellus shale formation.
Some fracking wastewater is shipped by oil and gas companies to treatment plants like Brine to be processed and released into waterways. But most wastewater is reused for more fracking, Lisa Kasianowitz, an information specialist at the Pennsylvania Department of Environmental Protection, told ClimateCentral.org.
Kasianowitz said the treatment facility is handling "conventional oil and gas wastewater in accordance with all applicable laws and regulations.”
Vengosh said that the research indicates that similar contamination may be happening around other fracking locations along the Marcellus shale formation in Pennsylvania, Ohio, and New York.
in RT.com
2 de outubro de 2013
no comments
Jelly fission? Jellyfish invasion leads to Swedish nuclear reactor shutdown
weden’s biggest nuclear reactor was forced to cease operations in a queer twist which had nothing to do with earthquakes or anti-nuclear protests. A giant swarm of jellyfish invaded the area, sneaking into pipes and causing a shutdown.
Over the weekend a large number of Aurelia aurita, or moon jellyfish, plugged the cooling water intake pipes at the Oskarshamn nuclear power plant on the Baltic Sea coast, leaving the operator no choice but to disconnect the facility’s 1,400-megawatt Unit 3 from the grid.The employees of the plant were battling the sea creatures till Tuesday, when a spokesman for the operator announced that the jellyfish had been removed and the reactor was being prepared for restart.
“We hope we’ve solved the problem regarding the jellyfish, but we aren’t sure because they can come back,” Anders Osterberg, a spokesman for Oskarshamns Kraftgrupp AB, told the New York Times.
According to Osterberg, the jellyfish got into the pipes at about 18 meters below the sea surface, where the plant collects cold water to cool its reactor and turbine systems.
There was no risk of a nuclear accident, he stressed, adding that the invaders hadn’t made it past the filter or come anywhere near the reactor.
It was the jellyfish which were at risk, as they could’ve been killed by the pressure from the filtration system, but not from contact with any boiling water.
“There will be no dinner of boiled jellyfish,” spokesman said.
Osterberg recalled a similar incident in 2005 when the Oskarshamn’s unit 1 was shut down.

Oskarshamn nuclear power plant in Oskarshamn, Sweden (Reuters / Mikael Fritzon)
Jellyfish clogs are recurring problem for nuclear power plants around the world, which are often placed next to large bodies of water. In October 2008, the Diablo Canyon 2 reactor in California had to be shut down after jellyfish bottled the circulating water screens and caused a problem with water pressure, according to US Nuclear Regulatory Commission data.
Another invasion by of Aurelia aurita into a cooling canal at the St. Lucie Nuclear Plant in Florida caused a massive fish kill in August 2011, clogging the intake pipes with five tons of dead fish in the canal and triggering an unplanned shutdown.
Jellyfish shutdowns were also reported at nuclear facilities in Scotland, Israel and Japan, the Power magazine notes.
According to National Geographic, the incidents may be one of the consequences of what the marine scientists warn is an ominous surge in the global jellyfish population.
The gelatinous creatures have fewer natural predators due to overfishing, while, unlike other aquatic species, they’re also able to withstand increasing levels of acidity in the oceans.
in rt.com
14 de abril de 2013
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