Snake Compass

Python skeleton Source: Worrapol Koranuntachai /123rf

Python skeleton
Source: Worrapol Koranuntachai /123rf

Burmese pythons (Python bivittatus) are a successful invasive species in Florida that have been profiting from local wildlife and few natural predators. Native to Southeast Asia and listed by the IUCN as vulnerable or endangered in their original habitats, abandoned or escaped pythons have been thriving in the Florida Everglades, to the dismay of conservationists trying to protect indigenous species there. Not much is known about how the snakes move or take up a new residence.

As it turns out, pythons have a distinct sense of  direction and territory when it comes to their habitat. A recent study published by the Royal Society journal Biology Letters suggests that pythons use a homing instinct to venture out from their usual territory and then find their way back.

A research team tracked several pythons – some of them trapped and removed miles away from their territories, some left in their adopted areas – to see whether the snakes that had been removed would be able to find their way home.

Source: Deimos in Flames / Deviantart

Source: Deimos in Flames / Deviantart

And indeed, all the relocated snakes demonstrated great determination to return to where they’d been captured in the first place. Most of them succeeded in finding their way back. The snakes which had been tagged and released without relocation moved around within a much more limited area, usually returning to their own territory.

The snakes clearly have both a ‘map sense’, which tells them where they are in relation to ‘home’, and a ‘compass sense’, which tells them in which direction to guide their movement. And it’s likely that this ability isn’t limited to the Burmese python – snake navigational abilities just haven’t yet been widely studied across many species.

According to this article, researchers say the internal python map “could be magnetic, like sea turtles, while the compass could be guided by the stars, olfactory (smell) cues, or by polarised sunlight – all of which have been shown to be used by reptiles.” Gaining knowledge of how snakes travel and navigate should prove useful in controlling their spread.

What I find interesting is how well the Burmese python has adjusted its internal compass to an entirely new corner of the planet from where it evolved. Having said that, another study published late last year suggests that Burmese pythons are among the most rapidly evolving vertebrates in the world.

How did the Burmese python learn to redefine home so quickly?

Source: gortan123/123rf

Source: gortan123/123rf

Mineral Relocation

Limestone is the key ingredient in cement, and is quarried around the world for mixing into one of the world’s most popular building materials. Limestone is composed mainly of CaCO3, calcium carbonate.

Coincidentally, the shells of the small snails shown above – like most gastropod shells – are also composed mostly of CaCO3. These little lopsided wonders, part of a small group of newly-identified members of the Plectostoma genus, live mostly on limestone hills in Malaysia, Sumatra and Thailand. Thor-Seng Liew of the Naturalis Biodiversity Center in Leiden, the Netherlands, who describes them in his recently published paper, has dubbed them ‘microjewels‘.

Unfortunately for them and their Plectostoma brethren, limestone for cement is vastly more popular among humans that calcium carbonate found in snail shells, no matter how asymmetrically lovely and unusual.

Ten of the 31 micro-landsnails listed in the research have been assessed to be critically endangered – or rather, nine are critically endangered, one is already extinct. The researchers are submitting all of them for classification and possible protection under the IUCN Red List.

To be fair, the limestone hills themselves are disappearing at a rapid rate, their CaCO3 headed for cement to build new hills in the form of buildings, somewhere else, and without the delicate CaCO3 of their former inhabitants, the microjewel snails.

Or rather, with their CaCO3, but minus the snails.

Limestone extraction at Bukit Panching, Malaysia, 2003-2010. The top image was taken after the 300 meter hill had already been mostly removed. The lower image shows what is now a lake where the hill once stood. Source: SiputKuning

Limestone extraction at Bukit Panching, Malaysia, 2003-2010. The top image was taken after the 300 meter hill had already been mostly removed. The lower image shows what is now a lake where the hill once stood.
Source: SiputKuning

 

 

 

 

River Garland

Comparative View of the Lengths of the Principal Rivers in the World.  Source: C. Smith (1817) via David Rumsey Map Collection

Comparative View of the Lengths of the Principal Rivers in the World.
Source: C. Smith (1817) via David Rumsey Map Collection

Here’s a stunning bit of old cartography, a comparative view of the lengths of the world’s main rivers.

Published in 1817 and created by ‘C. Smith’, the rivers were ‘straightened out’ for better viewing, with compass arrows added along their lengths to indicate in which direction they actually twisted and turned. At least, the directions they took before most of them were enhanced through major engineering projects over the decades and centuries.

Posted on David Rumsey Map Collection, a description of the each river (the sea of exceedingly fine print)  describes the course of the Missouri River as “recently explored by the Americans” (Lewis and Clark), and “extremely devious”.

The description of Italy’s Po River: “A celebrated Riv. and the largest in Italy…it often overflows its banks fertlizing the adjacent Country.”

I very much like how the Paraná and the Volga Rivers are so long that they spill out over the map’s own frame at the bottom.

Excerpt Source: C. Smith (1817) via David Rumsey Map Collection

Excerpt
Source: C. Smith (1817) via David Rumsey Map Collection

This excerpt shows an aspect of the map that I think is my favorite:

All the mouths of the rivers lined up next to one another, feeding into all the seas of the world at the same time.

I’m not sure what use this map served besides being a beautiful bit of geographical creativity, but some of the descriptions could be useful in comparing early 19th century river flow and direction with their modern developments.

Which brave cartographer will take up the challenge and create the modern version of this map?

Serendipitous Find

Turtle eggs. Photo: Palm Beach Post

Loggerhead turtle eggs.
Photo: Palm Beach Post

It’s one of those stories which, if it were written in a story, would be labeled implausible.

An amateur fossil collector is walking along the banks of a river when he sees a strange-looking stone sticking out of the mud. He bends down to have a closer look, and realises that the stone is, in fact, a bone. Thinking it might be a dinosaur fossil, he takes it to a museum.

The curator at that museum also happens to be someone who has seen another fossil that looked similar at another museum, a fossil that had been found 163 years earlier, origin unknown. He thought it might be interesting to compare the two.

And as it turned out, the two fossils did indeed have something in common: They were two halves of the very same bone.

More evidence that truth is sometimes stranger than fiction.

Ancient sea turtle bones found 163 years apart are a perfect match.  Photo: Drexel University

Ancient sea turtle bones found 163 years apart are a perfect match.
Photo: Drexel University

The fossil half that was found in 2012 by Gregory Harpel on the banks of a brook in New Jersey and donated to the New Jersey State Museum and which was matched to the fossil half found in 1849 and kept in the Academy of Natural Sciences at Drexel University did more than surprise by its mere discovery.

The location of the original fossil find hadn’t been recorded – now paleontologists know its origin. Monmouth County, New Jersey.

The bone that was broken millions of years ago, and the discovery of the second matching half, proved bones and fossils can stay intact when exposed to air for much longer than expected.

It helped researchers further describe the giant sea turtle, Atlantochelys mortoni, that swam the seas in 70 million to 75 million years ago during the Pleistocene or Holocene eras. The sea turtle most resembled the loggerhead turtle, which is currently considered endangered.

However, A. mortoni was the largest known turtle in history, measuring over three meters (10 feet). Much larger than the loggerhead, and at least as impressive in size as the wild tale of two matching fossil halves found over a century-and-a-half apart.

Loggerhead Sea Turtle (C. caretta) Photo: Jorge Candan

Loggerhead sea turtle (C. caretta)
Photo: Jorge Candan

Future Investment

Seeds 2 (pure fractal flame) Artist: Cory Ench via Fractal World Gallery

Seeds 2 (pure fractal flame)
Artist: Cory Ench via Fractal World Gallery

This year marks the first time that all Monsanto Roundup Ready genetically-modified seeds will be off-patent. This means that any company can start making ‘generic’ versions of the GM soybeans, corn and so on – unless, of course, their use and the use of the companion Roundup-based herbicide has been banned*.

The path ahead is complex. Up until now, the source of these particular GM seeds was Monsanto, together with companies to which Monsanto had licensed the use of the these products. As of 2010, this accounted for a staggering 98% of soybean seed and 79% corn seed sales  in the world.

A double-edged sword: On the one hand, Monsanto vigorously guarded the use of its product, taking even farmers who had never planted Roundup Ready seeds to court because open pollination had left them with traces of GM crops in their fields. But it also meant that farmers who might like to ‘go GM’ didn’t due to contractual or pricing concerns. Well, those concerns may fade now, and GM use may spread.

It’s always interesting to take a look at this issue from a different perspective, and sometimes I do that by reading the investment news on seed and chemical companies.

Last year, an article on MSN Money took a look at the Big Three seed companies: Monsanto, Syngenta and DuPont. In choosing which seed company was the best investment, author Jim J. Jubak factored in the loss of patent control, as well as how much of each company’s revenue was actually seed-based (high margin), how much was based on chemical crop protection (‘volatile’), and how much was in other sectors.

Seeds (pure fractal flame) Artist: Cory Ench via Fractal World Gallery

Seeds (pure fractal flame)
Artist: Cory Ench via Fractal World Gallery

In brief, Jubak recommended DuPont. Why? Because the company had none of Monsanto’s patent problems, was shedding its non-seed businesses and buying up seed companies, and was the most focused of the three on the core: Creating and selling seeds.

Why should investors want seed companies in their portfolio? As Jubak said, “By 2050 the world will have a population of 9 billion (very scary) and the world’s farmers will need to double grain production in the face of losses of farmland to urbanization, desertification, drought and pollution.

“That means getting more calories from the world’s food plants by improving yields, by increasing resistance to disease and pests, and by expanding farm production to land that is now marginal because of climate or rainfall (while at the same time resisting attacks on global food production from changes in climate and an increasing incidence of drought.”

For what it’s worth, Jubak was mostly right: Since the article was written in July 2013, Dupont‘s stock has gone up by 16.6 %, Monsant0‘s by 12.59%, and Syngenta‘s has gone down by 6.08%. If Monsanto was going to suffer from the loss of its patents, it hasn’t come through in its stock price.

Now, what’s the point of looking at seeds from an investor’s perspective?

Genetic Code Revisited  Artist: Cory Ench via Fractal World Gallery

Genetic Code Revisited
Artist: Cory Ench via Fractal World Gallery

Because that’s what seeds are. You can see them as an investment in the baldest sense of financial gain, without the baggage of other concerns except as a motivating investment factor.

You can also see them as an investment in the future in terms of feeding the planet, maintaining and promoting biodiversity (both plant and animal), enriching lives and soil, and as a continuation of what we as humans have been doing for millennia.

The two views don’t have to be mutually exclusive, but for the moment, it seems that they are.

 

*Current bans on use of glyphosate products are in force in Denmark, El Salvador and Sri Lanka.

Generative Art, Rootworm Evolution

A 'sheep' created by Electric Sheep. Image: Überraschungsbilder/Wikipedia

A ‘sheep’ created by Electric Sheep.
Image: Überraschungsbilder/Wikipedia

What do we call evolution that plays with the toys we provide, jumps the obstacles we set, which meets us on the field of our own choosing, and then bests us?

In the case of the shared technology created by Scott Draves for creating ever-changing, computer-human collaborations of software art known as Electric Sheep, we call each new creation a ‘sheep’.

In the case of Bt corn, we call it the ‘rootworm’. This little fellow has evolved both immunity to and an appetite for the very corn that was genetically modified to be resistant to the rootworm (Diabrotica virgifera virgifera).

Actually, Bacillus thuringiensis corn, or Bt corn, was genetically engineered to produce insecticidal toxins derived from the bacterium Bacillus thuringiensis (Bt) in order to kill pest insects and reduce the use of conventional insecticides.

Mature corn rootworm beetles. Photo: Univ. of Nebraska/FreeGeorge

Mature corn rootworm beetles.
Photo: Univ. of Nebraska/FreeGeorge

How did the rootworm turn the nifty trick of learning to love the plant created to kill it? It didn’t do it alone – it needed our help. If environmental recommendations had been followed, which is to say, if the GM corn fields had been interspersed with non-GM corn fields at given intervals (50% was the original recommendation, pushed down to 5 – 20% by seed companies and the Environmental Protection Agency, the rootworm might have stuck to the tasty, non-resistant corn, thus leaving intact the resistant corn’s viability.

But apparently, these recommendations were not followed. Or maybe they were, and the insect’s genetic evolution is just that creative. At any rate, now the pest feeds on both kinds of corn. And a second GM type of corn as well.

I should mention that for the short glory period of ten years during which Bt resistant corn was introduced by Monsanto and remained rootworm-resistant, the GM corn became the leading corn crop in the United States. It now makes up three-quarters of all corn grown there.

The Electric Sheep project has been ongoing since 1999 and comes up with ever new iterations of ‘sheep’, lovely swirls of ever changing software DNA, pleasing to the eye and in constant motion.

The evolutionary project of the rootworm has been going on for over four million years, and apparently, it’s also still in constant motion.

Happy Vernal Equinox!

The First Bee

DSC02060

The season’s first bee – well, the first bee I saw, I’m sure there were others – landed outside on our house wall a last week and dithered there for a few minutes before departing again. Then there were more, bumping clumsily into the window of my office and startling me, or just hovering and making a lot of noise.

So today I went to the back of the house and checked the spot in the roof where a colony of bees takes up annual residence. And sure enough, there they were, a small swam of them already busy with work in the upper eave of our house wall.

There’s a reassuring regularity to their annual return. It means life is taking its habitual course. The early seeds of springtime, each promising new life: Bees gonna fly, flowers gonna bloom and trees gonna grow. And it’s time to be planting the seeds of the season out in the garden.

in-growing-these-older-corn-varieties-barnes-was-able-to-isolate-ancestral-types-that-had-been-lost-to-native-american-tribes-when-they-were-relocated-to-what-is-now-oklahoma-in-the-1800s-this-led-to-an-exchange-of-ancien

A crazy corn variety, glass-gem corn, a non-GM corn variety. Created using tradition cross-breeding of US native corn varieties.
Photo: Greg Schoen

Sometime soon, the Brazilian parliament is going to be voting on whether seeds will continue to follow the age-old cycle of containing the life of a new spring. A bill to allow the use of sterile seeds has been in the pipeline since 2007, and is due for an imminent vote after being postponed late last year due to protests.

So-called Terminator seeds, or ‘gene-use restriction technology’, has banned around the world for its inherent danger and, dare I say, its inherent immorality. The genetically-modified seeds are programmed to die off after a single crop, which is to say, each crop is its own complete and finished cycle. Each new crop requires a new purchase from the seed company.

It’s not that most farmers don’t already buy their seeds from companies already, and it’s not that farmers and gardeners like myself haven’t been buying seeds from companies for the past century or more. And there are well-publicized conflicts when farmers replant patented seeds without paying the licensing fee – i.e. keeping back a seed stock from the previous year’s harvest for replanting. Still, the GM crops have an infuriating habit of spreading beyond their planting parameters and mixing with non-GM crops.

The proponents of the gene-use restriction technology in Brazil say the sterile plants would be for non-food crops only, and would be used only for medicinal plants and the fast-growing eucalyptus trees that feed the paper-making industry.

Glass-gem cornPhoto: Greg Schoen

Glass gem corn
Photo: Greg Schoen

But once a ban has been broken, it’s been broken. Even if the uses are meant to be limited, non-food, and ‘beneficial to humanity’, as Eduardo Sciarra, Social Democratic party leader in the Brazilian Congress, has said.

A handful of seed companies control 60% of all seed patents around the world. Many farmers, large and small, are already dependent on seed companies and the narrow range of seed crops they supply.

A loss of biodiversity and monoculture as well as economic dependency often result.

Seed companies like Monsanto and Syngenta hold patents on gene-use restriction technology, but have pledged not to implement these patents. If the door were to be opened, however, how long could each company resist the tug of economic activity? Adding the option of sterile seeds to this could initiate a disastrous cascade, the antithesis of the annual cycle of life heralded by the bee outside my window.

I encourage you to take a moment and join me in signing a petition to remind the Brazilian parliament of its responsibility, not just to its own people and environment, but to ours as well.

Last year’s bees.

 

The Full Cloth

WHITE ELEPHANT

Origami elephant
Photo: Philipp Schmidli / Sipho Mabona

On World Wildlife Day, March 3, Nepal achieved a rare feat: an entire year without wildlife poaching. In the three years since 2011, the country lost a single rhino to poaching. Populations of rhinos, tigers and elephants are on the rise.

Compare this to other nations, where these animals are disappearing fast. South Africa has seen 146 rhinos already killed in 2014, over 1000 in 2013.

So, what is Nepal doing right?

Many things, apparently, because no single solution works. First, the country has a zero-tolerance approach to poachers. Get caught, go straight to jail for up to fifteen years. And there’s no long court process involved – Nepal’s forest law allows chief game wardens to pass judgement and punishment, lessening the likelihood of escape or a long, fruitless court trial.

The country also places a high priority on seeking out and capturing ring leaders. Various agencies work collaboratively to share information and find dealers and enforce anti-trafficking laws.

Tourists prepare to ride an elephant during a wildlife safari in Chitwan National Park. Photo: Gemunu Amarasinghe / AP

Tourists prepare to ride an elephant during a wildlife safari in Chitwan National Park.
Photo: Gemunu Amarasinghe / AP

Crucially, in the promotion of ecotourism, the Nepalese government not only supports programs that provide employment, it also redistributes the revenues from parks and tourism – licence fees, park entrance fees, and so on – among local communities. Half of all tourism revenues are handed back to the locals, making the animals more valuable alive rather than dead.

This achievement is all the more impressive due to Nepal’s location between China and India, two of the main regions for trafficked animal parts.

Origami elephant created by Sipho Mabona Photo by Philipp Schmidli / Mabona

Origami elephant created by Sipho Mabona
Photo by Philipp Schmidli / Mabona

Artist Sipho Mabona created an entire life-sized origami elephant out of a single piece of paper, a long project that required over a year of planning, a month of construction and many hands.

Mabona‘s elephant is a good symbol of Nepal’s achievement. This creation is no piece of easy patchwork.

Anti-poaching success is something that results from a whole cloth approach and many hands. It’s impressive, it’s inspiring, and at the same time, it’s fragile.

Time lapse film of the elephant’s construction.

What we talk about when we talk about war (V)

Syrian desert. Photo: Marija Miloradovic/TrekEarth

Syrian desert.
Photo: Marija Miloradovic/TrekEarth

 

Permafrost warms, glaciers recede and life that has been dormant is revived – and biodiversity surprises abound. A number of otherwise extinct mosses and lichens have been exposed by the retreat Ellesmere Island’s Teardrop Glacier.

A 30,000-year-old virus, benign but previously unknown, was found in ice cores pulled from  Siberian permafrost.

Some apprehension is understandable; not all giant viruses are benign.

Credit: Julia Bartoli & Chantal Abergel; Information Génomique et Structurale, CNRS-AMU

Credit: Julia Bartoli & Chantal Abergel; Information Génomique et Structurale, CNRS-AMU

But another powerful environmental force has revived a virus much smaller, more recent, and more lethal. War supports biodiversity of the worst kind.

The polio virus, all but eradicated, has been making a comeback in the Middle East due to the retreat of vaccinations during the four-year conflict. A 95% vaccination rate is considered sufficient to keep the virus from infecting populations. The rate of vaccination during the Syrian war was estimated at 68% in 2012, and is less now.

Twenty five cases of polio have been confirmed in Syria since October 2013. Another 84 cases of measles have been confirmed in the first week of 2014, according to the World Health Organization. And an estimated 500,000 Syrian children, many unvaccinated, are now living as refugees in neighbouring countries.  A wider spread of the disease is feared. Vaccination programs are underway in refuge camps.

Polio is caused by a human enterovirus called the poliovirus. There are three types; Type 2 has been eliminated, Types 1 and 3 still exist, with Type 1 being the most pervasive and dangerous. Source: GPEI site photo gallery

Polio is caused by a human enterovirus called the poliovirus. There are three types; Type 2 has been eliminated, Types 1 and 3 still exist, with Type 1 being the most pervasive and dangerous.
Source: GPEI site photo gallery

Human-caused climate change extends to areas long covered by glaciers; it will be interesting and hopefully not too frightening to see what kind of viral biodiversity rebounds from the ice.

In the case of polio, however, we had come so far in pushing it to the brink of extinction. Watching its return as a result of human negligence and war is one environmental development that is both a sign of the tenacity of the virus, and of our own disregard for the best of which we are capable.

Unfallowing Fields

Retuertas horses are back enjoying their freedom in western Spain for the first time in 2000 years. Photo: Juan Carlos Muños Robredo / Rewilding Europe

Retuertas horses are back enjoying their freedom in western Spain for the first time in 2000 years.
Photo: Juan Carlos Muños Robredo / Rewilding Europe

There aren’t many good things to say about the economic problems faced by Spain since 2008, with high unemployment and mass company closures.

The amount of farmland being utilized has also receded with the contracting economy, but there’s been an unexpected silver lining.

In areas no longer under cultivation, animal species that were disappearing are beginning to establish themselves with the assistance an initiative known as Rewilding Europe. The group works to reclaim abandoned grazing and farmland, and to create ‘wild nature’ reserves.

Carlos Sanchez, director of the conservation group running the site, was quoted as saying,  “We are recovering the most primitive breeds to try to help manage an ecosystem which has been abandoned due to the disappearance of humans.”

Screen Shot 2014-03-11 at 10.03.01 AM

It is active in a number of countries, but identifies its areas of activity in terms of regional ecosystems rather than national borders. Thus, the five main areas of activity are Western Iberia, the Eastern Carpathians, the Danube Delta, the Southern Carpathians, and the Velebit.

Among the species being reintroduced in Spain are European oxen; the Retuerta, an ancient breed of horse; European vultures (the vast majority of the four surviving vulture species are in Spain); and the Iberian lynx. Rewilding Europe aims to support nature reserves that not only promote the return of wildlife, but create new economic alternatives to industry and agriculture.

Spain’s economy has taken a turn for the better over the past year, but perhaps the land being reclaimed as wild has been abandoned for long enough that there’s no immediate risk of the new nature reserves coming into conflict with farming interests.

Animals, especially large animals and predators, change environments. Given enough time, it will be interesting to see how re-wilding changes local landscapes.

Caballo horse (Equus ferus caballus), Campanarios de Azaba Biological Reserve, Salamanca, Castilla y Leon, Spain Photo: Juan Carlos Muños Robredo / Rewilding Europe

Caballo horse (Equus ferus caballus), Campanarios de Azaba Biological Reserve, Salamanca, Castilla y Leon, Spain
Photo: Juan Carlos Muños Robredo / Rewilding Europe

More: Making Europe A Wilder Place