Animal Species Soon To Go Extinct

Guest Post by Anna Miller

Some endangered species get all the attention. Polar bears, pandas, and Siberian tigers are hotshots in mainstream conservation campaigns and are featured in various commercials, complete with melodramatic music and emotional appeals. But there are many animal species that are just as close or closer to extinction than these select few. And many of them are equally cute. The following animals are all considered to be critically endangered and could disappear within our lifetimes.

Golden-Mantled Tree Kangaroo

Less famous than its ground-dwelling, boxing relatives, the golden-mantled tree kangaroo (pictured above) has jumped onto the list of species facing extinction. It looks similar to a kangaroo or wallaby, but has strong forearms and a long ringed tail. Tree kangaroos also have rubbery soles on shorter, wider feet to make them more adept at climbing than kangaroos on the ground. Though they are slow and clumsy on land, tree kangaroos move expertly through trees, wrapping their forearms around a limb and using the hind legs to propel themselves up. They also leap with ease between trees. The golden-mantled tree kangaroo lives in the forested areas of a mountain range in Papua New Guinea and was discovered in Indonesia in 2006 by a group of scientists. As more of the forest is cleared away to be made into cultivated land, the tree kangaroo’s home is shrinking — bad news when it has been run out of 99% of its historical habitat range. In 2008 there were only 250 of its kind left, and experts expect the number to drop under 200 in the next 10 years or so

Siau Island Tarsier

This Gremlin-esque little guy comes, unsurprisingly, from the island of Siau in Indonesia. Tarsiers are nocturnal primates with extremely large eyes, soft fur, and long fingers and feet. Researchers believe the Siau Island tarsier numbers in the low thousands, and local residents have said they’ve seen fewer and fewer of these tarsiers during the past 10 years. Take into account that more than half of the animal’s home is an active volcano and that the island’s human population is rumored to regularly eat five to 10 tarsiers in one sitting, and the future’s not looking good for this species. In fact, it was put on the 2008-2010 list of the 25 most endangered primates, ranking up there with heavyweight names like the Sumatran Orangutan and Cross River Gorilla.

Pygmy Three-Toed Sloth

A slightly smaller version of your average sloth found only on one small island off the coast of Panama, the pygmy three-toed sloth is inching its way toward extinction with presumably fewer than 500 of its kind remaining. Though apparently not helping it survive human threats, this sloth’s set of skills includes the ability to turn its head 360 degrees and to grow algae on its fur. The algae is thought to be a sort of camouflage, but it hasn’t been able to protect the sloth from fishermen, who hunt the sloths and can spot them easily in their habitats near open sea. And while sloths have gotten a bad name for being lazy, what with the whole seven deadly sins thing, maybe that reputation will help them in this instance. Hopefully when it comes to extinction, these sloths will go very slowly.

Beluga

If something’s not done to protect the beluga, the rich and famous may have to do without their caviar dreams permanently. The beluga, or European sturgeon, is one of the few sturgeons whose egg masses are used to make traditional caviar. Because of this notoriety, though, the beluga is frequently overfished and poached. And because it takes about 15 years for a beluga to mature, it is difficult for the fish to recover from being hunted. Not to be confused with the beluga whale, this ugly fish looks like something that could’ve gone extinct with the dinosaurs. A fully grown sturgeon can grow up to 15 feet long and weigh 2500 pounds. The largest one ever recorded was more than 3000 pounds and measured almost 25 feet. But the numbers of this big fish are dwindling, decreasing about 90% during the last 60 years. Most of the beluga in the world today are raised in hatcheries, and it may not be long until this animal is extinct in the wild.

 Namdapha Flying Squirrel

You would think that a mammal that is able to fly would be evolved enough to avoid facing extinction, but that’s not the case with the Namdapha flying squirrel. Being fuzzy and adorable apparently isn’t helping either. This squirrel has only been found in one park in northeastern India so it is in great danger of disappearing. Among the top threats to the squirrel are human and animal predators and the degradation of its habitat. Like other flying squirrels, the Namdapha flying squirrel is able to soar from tree to tree using a parachute-like muscle membrane on the sides of its body. As it’s soaring, the squirrel is able to steer itself by moving its legs, tail and the membrane. The main differences between this squirrel and its cousins, like Rocky the Flying Squirrel, are the coloring and some variations in its features. Maybe this flying squirrel needs some help from Bullwinkle to save the day.

Iberian Lynx

This species of cat is just about out of lives. The near-relative to the common bobcat has earned the title of “world’s most threatened species of cat” and could become the first feral cat to become extinct in about 2000 years. The Iberian lynx lives in Spain and possibly in Portugal, and while this cat’s preferred food is rabbits, it has been forced to hunt other types of prey as the rabbit population has decreased drastically due to disease. The lynx has also increasingly been killed by speeding traffic on Spain’s growing network of roads. In 2000, there were thought to be 400 Iberian lynx remaining. By 2003, that number had been cut to about 160 and then possibly to 100 by 2005. It’s rumored that the Spanish government is releasing rabbits into the wild to replenish the lynx’s hunting grounds and organizations are calling for the closure of the busiest road that runs through the lynx habitat. It’s yet to be seen if these actions could help this cat species land on its feet.

Radiated Tortoise

  • Considered by many to be the world’s most beautiful tortoise species, the radiated tortoise is in a losing race against time. It’s found on the southern coast of Madagascar, and though it once numbered in the millions, it has been hunted to a point that the species may not survive. People use its meat for food, but it is also said to be an aphrodisiac — some people from China will pay $50 to eat one. The bright star pattern on its shell also makes the tortoise a commodity in the illegal pet trade market. Madagascar park authorities and law enforcement are poorly equipped to deal with poachers, and the poachers have even started hunting the radiated tortoise on protected areas, like reserves or World Heritage Sites. Some scientists have predicted that this tortoise could be extinct in 20 years if drastic measures aren’t taken.

Monk Seal

Only two kinds of monk seals still exist: the Hawaiian monk seal and the Mediterranean monk seal. And both are close to extinction. To make matters more serious, the third monk seal species, the Caribbean monk seal, went extinct sometime in the last 60 years. (To make matters less serious, native Hawaiians call their monk seal ‘Ilio-holo-i-ka-uaua, a name that means “dog that runs in rough water.”) The threats to monk seals include angry fisherman who are afraid they can’t compete with the seals for fish, water pollution and the use of boats and the beaches where seals frequent. There are about 1000 Hawaiian monk seals alive today, but experts predict that number will fall to 200 in the next 20 years. Only 350 to 450 Mediterranean monk seals remain and that number is also falling.

 Blue-Throated Macaw

  • This blue-and-yellow Bolivian bird has quickly decreased in number during the past few generations. Its bright feathers makes it a favorite as a pet, and though it’s illegal to trade macaws, it continues to happen. Parrot-stealing seems like the perfect crime for a pirate. There are also a few instances of the bird being hunted for its feathers to make indigenous headdresses or for its meat to bait fish hooks. This parrot’s habitat is also being threatened because it’s located on cattle farms where trees are being cut down to create pastures and provide fuel. The blue-throated macaw is also facing competition for nesting sites from other birds such as toucans and big woodpeckers, as well as other macaws. There are only about 300 blue-throated macaws in the wild today.

Florida Bonneted Bat

No matter how many bat signals Florida authorities cast into the sky, the bonneted bats aren’t coming out. This bat, Florida’s largest with a wingspan of up to 18 inches, is named for its big ears that stick out over its eyes like a hat and can only be found on the southern tip of the state. It lives in hollowed-out trees, in suburban places like attics or under Spanish roof tiles and sometimes in foliage or under rocks. But because the suitable hiding places are normally older buildings or trees with large cavities, many of the bat’s habitats are being destroyed, by both humans and hurricanes. With only 250 or so bonneted bats left, this species could be on its way out. Holy extinction, Batman!

Dama Gazelle

  • Dama gazelles used to graze all across northern Africa, presumably showing up in herds to join in a chorus of “The Circle of Life.” But now the animals that once numbered up to 10,000 on just one reserve can only be found in a few isolated areas in Chad, Mali, and Niger. Experts say there are definitely less than 500 of these gazelles left in the wild and they can’t be found in groups of more than 20, which are normally hundreds of miles apart. The main threats to this gazelle are hunting by nomads, military and hunting parties, and a loss of its habitat because of overgrazing of domestic livestock. The dama gazelle is expected to follow the same path out of the circle of life as the Scimitar-horned Oryx, which is now extinct in the wild.

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Drought and Forest Fire Prediction System Devised for Amazon

Researchers have devised a model to anticipate drought and forest fires in the Amazon rainforest.

The research, which used precipitation records dating back to 1970 and hotspots tracked by the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard NASA satellites, finds a strong correlation between sea surface temperatures in the tropical North Atlantic and subsequent drought in the western Amazon. Drought in the Amazon is increasingly associated with forest fires due to land-clearing fires set by agricultural developers and cattle ranchers.The researchers, led by Katia Fernandes of Columbia University, conclude that their model could be used to forecast drought up the three months in advance, giving authorities a window to alert ranchers and farmers about the increased risk of using fire to clear land during the dry season, which typically runs from July-September. Coupled with its existing satellite-based deforestation monitoring capabilities, the warning system could prove useful to Brazil as it aims to reduce deforestation rates under its national climate action plan.

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Heat of The Earth:Where Does it Come From?

The earth is a heat engine. It remains geologically and biologically active, and evolves, because there are two great sources of energy. One source of energy is from the earth’s molten core (that drives the geology), and the second is from the sun (that drives life and the atmosphere.)However, considering the fact that the solar system began as a cloud of gas and dust that was near absolute zero we might wonder where the earth’s internal heat came from to drive the plate tectonics. The problem is more perplexing when we realize that virtually every other planetary body in the solar system (including some moons that are larger than some planets) is geologically dead (they have no internal heat of their own). Similarly, the earth is the only planetary body we know at present that is biologically alive too.

Earth may have formed more than 4.5 billion years ago, but it’s still cooling. A new study reveals that only about half of our planet’s internal heat stems from natural radioactivity. The rest is primordial heat left over from when Earth first coalesced from a hot ball of gas, dust, and other material.The new finding comes from experiments carried out deep inside a Japanese mountain. Itaru Shimizu, a particle physicist at Tohoku University in Sendai, Japan, and his colleagues used geoneutrinos—particles produced in a variety of ways, particularly during certain types of radioactive decay—to more directly estimate the amount of radiogenic heat produced inside Earth.

44 terawatts of heat!

We all know that the Earth runs on massive amounts of heat – enough to melt iron in the outer core, create magnetic field, spread the sea floors and move the continents. However, where all this heat comes from was a mystery until now. According to a new research, only about half of our planet’s internal heat stems from natural radioactivity. The rest is primordial heat left over from the planet’s formation, and possibly others. Geologists estimate that some 44 terawatts (44 trillion watts) of heat is constantly flowing out of the Earth’s interior into space.

Where does it come from?

Geologists relied on temperature measurements from more than 20,000 boreholes around the world. Radioactive decay of uranium, thorium, and potassium in Earth’s crust and mantle is a principal source, and in 2005 scientists in the KamLAND collaboration, based in Japan, first showed that there was a way to measure the contribution directly. Using the Kamioka Liquid-scintillator Antineutrino Detector (KamLAND) located under a mountain in Japan, they analysed geoneutrinos – emitted by decaying radioactive materials within the Earth.

The antineutrinos theory
KamLAND scientists have now published new figures for heat energy from radioactive decay. Based on the improved sensitivity of the KamLAND detector, plus several years’ worth of additional data, the new estimate is not merely “consistent” with the predictions of accepted geophysical models but is precise enough to aid in refining those models. Antineutrinos are produced not only in the decay of uranium, thorium, and potassium isotopes but in a variety of others, including fission products in nuclear power reactors.
The assumption
All models of the inner Earth depend on indirect evidence. Leading models of the kind known as bulk silicate Earth (BSE) assume that the mantle and crust contain only lithophiles (“rock-loving” elements) and the core contains only siderophiles (elements that “like to be with iron”). Thus all the heat from radioactive decay comes from the crust and mantle – about eight terawatts from uranium 238 (238U), another eight terawatts from thorium 232 (232Th), and four terawatts from potassium 40 (40K).
Primordial or some other heat?
Additional factors that have to be taken into account include how the radioactive elements are distributed (uniformly or concentrated), variations due to radioactive elements in the local geology, antineutrinos from fission products, and how neutrinos oscillate as they travel through the crust and mantle. Alternate theories were also considered, including the speculative idea that there may be a natural nuclear reactor somewhere deep inside the Earth. This is more heat energy than the most popular BSE model suggests, but still far less than Earth’s total.
Geothermal gradient 
Geothermal gradient is the rate of increasing temperature with respect to increasing depth in the Earth’s interior. Away from tectonic plate boundaries, it is 25–30°C per km of depth in most of the world. Strictly speaking, geo-thermal necessarily refers to the Earth but the concept may be applied to other planets. The Earth’s internal heat comes from a combination of residual heat from planetary accretion (about 20%) and heat produced through radioactive decay (80%). The major heat-producing isotopes in the Earth are potassium-40, uranium-238, uranium-235, and thorium-232. At the center of the planet, the temperature may be up to 7,000 K and the pressure could reach 360 GPa. Because much of the heat is provided by radioactive decay, scientists believe that early in Earth history, before isotopes with short half-lives had been depleted, Earth’s heat production would have been much higher. This extra heat production, which was twice that of present-day at approximately 3 billion years ago, would have increased temperature gradients within the Earth, increasing the rates of mantle convection and plate tectonics, and allowing the production of igneous rocks such as komatiites that are not formed today.
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Algae that Can Produce Their Own Biofuel

 A team of researchers led by University of Kentucky College of Agriculture Professor Joe Chappell is making a connection between prehistoric times and the present — ancient algae that can produce their own biofuel — that could result in genetically creating a replacement for oil and coal shale deposits. Their discovery could have fundamental implications for the future of Earth’s energy supplies.

Botryococcus braunii, Race B, is an ancient, colony-forming green alga that has attracted interest because it accumulates large amounts of high-value, petrochemical replacement oils. The oil oozing from the algal colony is evident in this picture. (Credit: Photograph courtesy of Taylor Weiss, Andreas Holzenburg, Stanislav Vitha and Timothy P. Devarenne at Texas A&M University

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