Deench

Everything for Everyone

USDA’s Wildlife Services program reportedly kills 50,000 harmless animals

An investigation by The Sacramento Bee has discovered that the Department of Agriculture's Wildlife Services program has killed 50,000 harmless animals from more than 150 species, some endangered, since the year 2000. Meant to protect livestock from predators, the program seems to be using methods that are not especially well targeted.

Protected golden and bald eagles, kit foxes, river otters, wolverines, and pet dogs are among the creatures that have fallen foul of the animal traps, snares, and poisons used by the service. Over the same period, 10 people have been killed in crashes during aerial gunning runs—the practice of shooting predator species from aircraft. At least another 18 employees, not to mention "several" members of the public, have suffered exposure to cyanide, The Bee reports, having accidentally sprung traps meant for coyotes (of which the service has managed to kill a million in that time).

The Bee asserts that the Wildlife Services' methods are "at odds with science, inhumane, and sometimes illegal," asserting that they degrade natural habitats, reduce biodiversity, and encourage disease. The report claims that the service fails to report the accidental killing of endangered species when it is required by law to do so, quoting a trapper who claims he was told to literally bury golden eagles trapped in snares.

Former employees and activists paint a picture of an unaccountable organization with a public visage that masks the reality. "If you read the brochures, go on their website, they play down the lethal control," ex-employee Carter Niemeyer told The Bee. "It's smoke and mirrors. It's a killing business. And it ain't pretty."

Wildlife Services Deputy Administrator William Clay claims that its trapping methods are at least 95 percent effective, and biologist Elizabeth Copper, who has worked with the service, defended the program's efforts to protect the endangered California Least Tern.

Read the comments on this post


USDA’s Wildlife Services program killing endangered species

An immature Golden Eagle–one of the species to fall prey to the Wildlife Services' methods

An investigation by The Sacramento Bee has discovered that the Department of Agriculture's Wildlife Services program has killed 50,000 harmless animals from more than 150 species, some endangered, since the year 2000. Meant to protect livestock from predators, the program seems to be using methods that are not especially well targeted.

Protected golden and bald eagles, kit foxes, river otters, wolverines, and pet dogs are among the creatures that have fallen foul of the animal traps, snares, and poisons used by the service. Over the same period, 10 people have been killed in crashes during aerial gunning runs—the practice of shooting predator species from aircraft. At least another 18 employees, not to mention "several" members of the public, have suffered exposure to cyanide, The Bee reports, having accidentally sprung traps meant for coyotes (of which the service has managed to kill a million in that time).

The Bee asserts that the Wildlife Services' methods are "at odds with science, inhumane, and sometimes illegal," asserting that they degrade natural habitats, reduce biodiversity, and encourage disease. The report claims that the service fails to report the accidental killing of endangered species when it is required by law to do so, quoting a trapper who claims he was told to literally bury golden eagles trapped in snares.

Read more on Ars Technica&hellip


More evidence links a family of insecticides to bee colony collapse

For nearly six years, a mysterious condition called colony collapse disorder (CCD) has been wreaking havoc with the honey bee population in the US and Europe. The cause of CCD remains elusive, with various fingers being pointed at mites, fungi, viruses, pesticides, and even cell phone emissions. Today, a pair of studies were published in Science that suggest that sublethal exposure to a family of common pesticides called neonicotinoids might play a contributing role in the great bee die-off.

Read the rest of this article...

Read the comments on this post


Oil sands and loss of carbon-trapping bogs and fens

Exploiting the Canadian oil sands to extract their stored hydrocarbons remains controversial. The mix of sand, clay, water, and bitumen that we call the Canadian oil sands might be the second largest oil deposit on the planet. If that didn't make it an attractive target for exploitation, the fact that it's located in a stable, friendly country that shares a land border with the US seals the deal for many. But extracting useable oil from oil sands is much more energy intensive (and expensive) than obtaining it from traditional oil fields, and concerns about the ecological impact remain.

In some ways, the name 'oil sands' is a bit misleading, since the area is not a sandy desert, but peatland, which has to be converted to open-pit surface mines. Although the various mines have to have plans for post-mining land reclamation, it's not possible to return the mines to peatland, and mine operators propose to construct forests and tailing lakes. A new study from the University of Alberta, published in PNAS, has examined the effect of this transformation on carbon sequestration. It doesn't paint a happy picture.

Read the rest of this article...

Read the comments on this post


Why open science failed after the gulf oil spill

At last month's meeting of the American Association for the Advancement of science, there was an inspiring talk about how the open sharing of scientific data could provide new avenues for research. But the same session also provided a cautionary tale of all the factors that can get in the way of effective sharing of data. That talk came courtesy of Vernon Asper, a researcher at the University of Southern Mississippi. Asper normally studies natural hydrocarbon seeps on the floor of the Gulf of Mexico, and found himself dragged into the media spotlight amidst a swirl of competing interests as he tried to study the oil spill.

Asper said that there was a clear "truth" about the spill that everybody was interested in: how much oil was spilling into the Gulf, and at what rate. But, in the absence of any way of directly measuring it, everybody was forced into relying on indirect ways of estimating the flow. If the gulf oil spill were a situation where nobody had money riding on the final outcome, these estimates might be combined to provide a rough final number along with a sense of the uncertainty associated with that number. Unfortunately, this wasn't a case where nobody cared.

Read the rest of this article...

Read the comments on this post


Carnivorous plants go undercover

Just 0.2 percent of the flowering plants in the world are known to be carnivorous. We’re most familiar with Venus Flytraps, pitcher plants, and other plants that capture and digest their prey with showy techniques. However, there are other carnivorous plants that are much sneakier in their murderous ways. This week, PNAS reports that a plant with a previously unknown method of carnivory has been discovered; it catches and consumes its prey underground.

Philcoxia minensis belongs to a small genus of plants that grow in the Cerrado region of Brazil. Like many other carnivorous plants, it lives in a bright, moist, low-nutrient environment and has a nonmycorrhizal root system, meaning that it doesn't form a symbiotic relationship with fungi to help it obtain nutrients. That led researchers to suspect that it might get those nutrients through carnivory. However, its method of prey capture wasn't obvious at first glance because from the surface, there’s no sign of any type of trap.

Read the rest of this article...

Read the comments on this post


Over time, Linux package dependencies show predator/prey relationship

You'll frequently hear references to a "software ecosystem" on various platforms, but it's relatively rare to see someone take that sort of terminology seriously. A group of evolutionary biologists, however, has now used the tools of ecosystem analysis to look at the evolution of Debian releases, examining things like package dependencies and software incompatibility.

The team went back to 1993 and compiled statistics on every major stable release, noting the number of packages in each release and comparing it to the previous version. This allowed them to track the life history of packages, watching as new ones were introduced and older ones got deprecated. In addition to compiling the statistics, the team also compiled the x86 version of the operating system and installed packages at random, which gave them a statistical measure of the frequency of dependencies and incompatibilities.

Several trends were apparent in the data. For example, the modularity of the system was increasing exponentially up until the 3.0 release, after which there was a sharp drop. From that point on, modularity held steady with successive releases. This had a major effect on functionality, defined as the rate at which randomly chosen packages would successfully install on a Debian system—the value started rising significantly with the version 3.1 release. The authors ascribe this to the large time gap between releases that occurred at this time.

Over time, software modules (clusters of packages with high interdependency) also increased in both size and number. As these trends continued, the number of software conflicts between modules went down; however, the number of conflicts within a module rose. "Therefore, there is a trade-off between reusing many pieces of existing code and the emergence of incompatibilities among software packages," the authors conclude. 

They also showed that it's possible to model this trade-off using standard ecological tools: dependencies between packages look like predator-prey interactions, while conflicts looked like species that have a competitive exclusion relationship.

Overall, the key feature of the modularity the team identified seems to be that the decreasing number of conflicts across modules means that more of the software available for the operating system can install, since it's rare that a conflict will completely block an entire module from installing and running. The authors suggest that we might learn something about biology by studying software, but they don't actually provide examples of how this might work; at this stage, then, it's not an especially compelling argument.

PNAS, 2011. DOI: 10.1073/pnas.1115960108  (About DOIs).

Read the comments on this post