by Deep Green Resistance News Service | Jun 4, 2012 | Agriculture, Biodiversity & Habitat Destruction, Toxification
By Jeremy Hance / Mongabay
Following research linking neonicotinoid pesticides to the decline in bee populations, France has announced it plans to ban Cruiser OSR, an insecticide produced by Sygenta. Recent studies, including one in France, have shown that neonicotinoid pesticides likely hurt bees’ ability to navigate, potentially devastating hives. France has said it will give Sygenta two weeks to prove the pesticide is not linked to the bee decline, known as Colony Collapse Disorder (CCD).
France’s decision comes after its National Agency for Food, Safety, and the Environment (ANSES) confirmed the findings of two recent studies published in Science. The two studies found that neonicotinoid pesticides, although not immediately lethal, likely hurt bee colonies over a period of time.
In the French study, researchers glued tiny microchips to free-ranging honeybees and then administered small doses of thiamethoxam, a primary ingredient in Sygenta’s Cruiser OSR to some of the bees. Bees exposed to the pesticide were two to three times more likely not to return from foraging trips, allowing researchers to hypothesize that the pesticide impairs the bee’s ability to navigate its surroundings successfully.
Because neonicotinoid pesticides work by impacting insects’ central nervous systems, they have long been a target for researchers trying to understand Colony Collapse Disorder, but the difficulty has been proving that pesticides harm hives even though they don’t kill bees outright.
However, Sygenta denies that their pesticides have played any role whatsoever in the bee collapse.
“All Syngenta’s crop protection products are thoroughly tested to ensure that there are no unwanted effects on beneficial insects such as bees or excessive residues in food or risks to human health,” the company says on its website.
The French government disagrees and has stated it would also raise the question of a ban on the pesticide for the entire European Union (UN).
Evidence of harm piling up
Despite Sygenta’s statements, studies continue to appear that find a link between neonicotinoid pesticides and Colony Collapse Disorder. Recently, researchers in the U.S. fed tiny doses of neonicotinoid pesticide-laced high-fructose corn syrup, which is commonly used to feed bees, to 16 hives in the field and left four hives untreated. For months all the hives remained healthy, but after around six months over 90 percent (15 out of 16) of the hives fed with the pesticidal corn syrup had collapsed, while the four control hives remained healthy.
“There is no question that neonicotinoids put a huge stress on the survival of honey bees in the environment,” lead author Chensheng (Alex) Lu, an associate professor at the HSPH, told mongabay.com.
Meanwhile another U.S. study published last month in the Journal of Experimental Biology, found that bees hit by neonicotinoid pesticides underwent behavioral changes. Exposed bees only fed on very sweet nectar, ultimately limiting their feeding choices. In addition the bees ability to communicate was injured.
Foraging bees communicate via ‘waggle dances’ whereby they show the hive where to find food sources. But says lead author Daren Eiri, “Remarkably, bees that fed on the pesticide reduced the number of their waggle dances between fourfold and tenfold. And in some cases, the affected bees stopped dancing completely.”
Scientists first started recording alarming declines in bees in North America in 2006. Shortly thereafter similar declines occurred throughout Europe, and have also been noted in Taiwan. While periodic colony collapses have been recorded since the 19th Century, the current crisis has proven much worst than past ones with some producers losing 90 percent of their hives. A number of theories for the collapse have been posited, including disease, parasitic mites, habitat loss, and, of course, pesticides. Many researchers have suggested a combination of these factors.
by Deep Green Resistance News Service | May 11, 2012 | Biodiversity & Habitat Destruction
By the Associated Press
The U.S. Navy may hurt more dolphins and whales by using sonar and explosives in Hawaii and California under a more thorough analysis that reflects new research and covers naval activities in a wider area than previous studies.
The Navy estimates its use of explosives and sonar may unintentionally cause more than 1,600 instances of hearing loss or other injury to marine mammals each year, according to a draft environmental impact statement that covers training and testing planned from 2014 to 2019. The Navy calculates the explosives could potentially kill more than 200 marine mammals a year.
A notice about the study is due to appear Friday in the Federal Register.
The old Navy analysis — covering 2009-2013 — estimated the service might unintentionally cause injury or death to about 100 marine mammals in Hawaii and California, although no deaths have been reported.
The larger numbers are partially the result of the Navy’s use of new research on marine mammal behavior and updated computer models that predict how sonar affects animals.
The Navy also expanded the scope of its study to include things like in-port sonar testing — something sailors have long done but wasn’t analyzed in the Navy’s last environmental impact statement. The analysis covers training and testing in waters between Hawaii and California for the first time as well.
“Each time around, each time we swing through this process, we get better, we take a harder look, we become more inclusive,” said John Van Name, senior environmental planner at the U.S. Pacific Fleet.
The Navy isn’t saying it will injure whales and dolphins as it trains sailors and tests equipment. It’s telling the public and environmental regulators that its actions have the potential to harm or otherwise prompt a reaction in the animals.
The Navy takes a variety of measures to prevent harm to the animals, including turning off sonar when marine mammals are spotted nearby. It says the actual numbers of injured animals would be lower as a result.
Read more from The Washington Post:
by Deep Green Resistance News Service | May 9, 2012 | Toxification
By University of California, San Diego
A 100-fold upsurge in human-produced plastic garbage in the ocean is altering habitats in the marine environment, according to a new study led by a graduate student researcher at Scripps Institution of Oceanography at UC San Diego.
In 2009 an ambitious group of graduate students led the Scripps Environmental Accumulation of Plastic Expedition (SEAPLEX) to the North Pacific Ocean Subtropical Gyre aboard the Scripps research vessel New Horizon. During the voyage the researchers, who concentrated their studies a thousand miles west of California, documented an alarming amount of human-generated trash, mostly broken down bits of plastic the size of a fingernail floating across thousands of miles of open ocean.
At the time the researchers didn’t have a clear idea of how such trash might be impacting the ocean environment, but a new study published in the May 9 online issue of the journal Biology Letters reveals that plastic debris in the area popularly known as the “Great Pacific Garbage Patch” has increased by 100 times over in the past 40 years, leading to changes in the natural habitat of animals such as the marine insect Halobates sericeus. These “sea skaters” or “water striders”—relatives of pond water skaters—inhabit water surfaces and lay their eggs on flotsam (floating objects). Naturally existing surfaces for their eggs include, for example: seashells, seabird feathers, tar lumps and pumice. In the new study researchers found that sea skaters have exploited the influx of plastic garbage as new surfaces for their eggs. This has led to a rise in the insect’s egg densities in the North Pacific Subtropical Gyre.
Such an increase, documented for the first time in a marine invertebrate (animal without a backbone) in the open ocean, may have consequences for animals across the marine food web, such as crabs that prey on sea skaters and their eggs.
“This paper shows a dramatic increase in plastic over a relatively short time period and the effect it’s having on a common North Pacific Gyre invertebrate,” said Scripps graduate student Miriam Goldstein, lead author of the study and chief scientist of SEAPLEX, a UC Ship Funds-supported voyage. “We’re seeing changes in this marine insect that can be directly attributed to the plastic.”
The new study follows a report published last year by Scripps researchers in the journal Marine Ecology Progress Series showing that nine percent of the fish collected during SEAPLEX contained plastic waste in their stomachs. That study estimated that fish in the intermediate ocean depths of the North Pacific Ocean ingest plastic at a rate of roughly 12,000 to 24,000 tons per year.
The Goldstein et al. study compared changes in small plastic abundance between 1972-1987 and 1999-2010 by using historical samples from the Scripps Pelagic Invertebrate Collection and data from SEAPLEX, a NOAA Ship Okeanos Explorer cruise in 2010, information from the Algalita Marine Research Foundation as well as various published papers.
In April, researchers with the Instituto Oceanográfico in Brazil published a report that eggs of Halobates micans, another species of sea skater, were found on many plastic bits in the South Atlantic off Brazil.
“Plastic only became widespread in late ’40s and early ’50s, but now everyone uses it and over a 40-year range we’ve seen a dramatic increase in ocean plastic,” said Goldstein. “Historically we have not been very good at stopping plastic from getting into the ocean so hopefully in the future we can do better.”
From PhysOrg: http://phys.org/news/2012-05-plastic-trash-ocean-habitats.html
by Deep Green Resistance News Service | May 1, 2012 | Biodiversity & Habitat Destruction
By Jeremy Hance / Mongabay
Six years after the Yangtze river dolphin (Lipotes vexillifer), or baiji, was declared “functionally extinct” by scientists, another marine mammal appears on the edge of extinction in China’s hugely degraded Yangtze River. In less than two months, 32 Yangtze finless porpoises (Neophocaena asiaeorientalis asiaeorientalis), a subspecies of the finless porpoise, have been found dead in Dongting and Poyang Lakes in the Yangtze, reports the World Wide Fund for Nature (WWF).
The porpoises are suffering from many of the same impacts that pushed the baiji to extinction: illegal electrofishing, strikes by boat propellors, poisons, and possibly pollution and food shortages from lower water levels linked by officials to climate change. Autopsies show that at least two of the animals were killed by electrofishing and boat propellers.
“This tragedy shows that Yangtze finless porpoise is facing enormous challenges,” Lei Gang, head of WWF China’s Central Yangtze program, said in a press release. “The porpoise deaths illustrates that without effective measures to fundamentally reverse the trend of ecological deterioration, future of the incredible creature is far from certain. We have to act immediately.”
Researchers believe that around 1,000 Yangtze finless porpoises survive in the river with the population in dramatic decline. Currently, the IUCN Red List is evaluating the subspecies to see if the situation warrants classifying the population as Critically Endangered.
Breakneck development, including a series of dams, with little environmental regard has left the ecology of the Yangtze River in shambles. Aside from the baiji’s extinction, many of the river’s key species are vanishing. The Chinese paddlefish (Psephurus gladius), arguably the world’s biggest freshwater fish, is listed as Critically Endangered with only two fish confirmed since 2002. Scientists fear the fish may be soon gone for good, if not already, after a 2009 survey couldn’t find a single fish. In addition the Chinese alligator (Alligator sinensis), the Yangtze sturgeon (Acipenser dabryanus), and the Yangtze soft-shell turtle (Rafetus swinhoei) are all listed as Critically Endangered.
Still, a controversial new hydroelectric project, the Xiaonanhai Dam, is moving ahead despite concerns that it will finish off a number of the river’s endangered fish, many found no-where else in the world.
by Deep Green Resistance News Service | Apr 29, 2012 | Biodiversity & Habitat Destruction
By Eddie North-Hager / University of Southern California
Every year nearly 7 million birds die as they migrate from the United States and Canada to Central and South America, according to a new USC study published on April 25 in the journal PLoS ONE.
The birds are killed by the 84,000 communication towers that dot North America and can rise nearly 2,000 feet into the sky, according to the authors of “An Estimate of Avian Mortality at Communication Towers in the United States and Canada.”
Placing that figure in context, the Exxon Valdez oil spill killed 250,000 birds and the Empire State building is 1,250 feet high.
“This is a tragedy that does not have to be,” said lead author Travis Longcore, associate professor in the USC Spatial Sciences Institute at the USC Dornsife College of Letters, Arts and Sciences.
The taller the tower the greater the threat, the study found. The 1,000 or so towers above 900 feet accounted for only 1.6 percent of the total number of towers. Yet these skyscraper towers killed 70 percent of the birds, about 4.5 million a year, Longcore said.
Most of the birds spent winter in places like the Bahamas and summer in Canada. With names like the Common Yellowthroat and the Tennessee Warbler, they could fit in the palm of one’s hand.
“These birds eat insects and keep our forests healthy,” Longcore said. “They are quite beautiful. We have a long history of appreciating birds. Millions of people watch birds.”
However, the birds are not generally killed by running into the tower itself but the dozens of cables, known as guy wires, that prop up the thin, freestanding structure, Longcore said.
During bad weather, the birds were pushed down by cloud cover and flew at lower altitudes. The clouds also removed navigation cues, such as stars, leaving only the blinking or static red lights of towers.
The blinking did not fool the birds, but towers with a static red light resulted in more dead birds.
“In the presence of the solid red lights, the birds are unable to get out of their spell,” Longcore said. “They circle the tower and run into the big cables holding it up.”
Longcore estimated that changing the steady-burning lights on the 4,500 towers greater than 490 feet tall (about 6 percent of the total) could reduce mortality about 45 percent, or about 2.5 million birds. The study also recommended that businesses share towers to reduce their number and build more freestanding towers to reduce the need for guy wires.
Read more from University of Southern California News: http://news.usc.edu/#!/article/34016/millions-of-birds-perish-at-communication-towers-usc-study-finds/
