Monday, September 27

especies

Animales, Aumento de la temperatura, cambio climatico, dragón de Komodo, ejemplares, especies, Noticias, reptil, Tendencias

Climate change now threatens the Komodo dragon | Digital Trends Spanish

According to a new report from the Union for Conservation of Nature (IUCN), the Komodo dragon, known as Varanus komodoensis, It is in danger of extinction. This animal is considered the largest lizard in the world, as well as being one of the largest predators in the animal kingdom, since it is capable of detecting its prey from 12 kilometers away. According to the new report, climate change and rising temperatures will cause the Komodo dragon's habitat to shrink by at least 30 percent in the next 45 years. This supposes a drastic reduction of their habitat which would seriously affect the survival of this species. For these reptiles, the main problem is due to the fact that the increase in temperature and the increase in the level of the oceans will dramatically reduce the amount of la...
caminando, especies, investigacion, microorganismos, Noticias, osos de agua, tardígrados, Tendencias, video

This video shows how the little “water bears” walk | Digital Trends Spanish

New research has shown that tardigrades are good walkers, despite their small size and soft anatomy. These microscopic extremophiles were called "little water bears" when they were discovered in 1773. They are capable of withstanding a great deal of stress, such as freezing temperatures, intense radiation, and dehydration. An investigation published in Proceedings of the National Academy of Sciences demonstrates that these agencies have "an exceptionally versatile set of locomotive tools." In fact, until recently it was believed that to move, they had to shake or slide, but now a video shows how efficient they are walking. One of the interesting things about this find is that, like other mocroscopic creatures, tardigrades are also soft-bodied, thus lacking an internal or external skelet...
Amazonas, arboles, Biodiversidad, bosque, cambio climatico, crecimiento rapido, ecología, especies, extinción, flora, Noticias, perdida, selva, Tendencias

Why do trees die in the Amazon? | Digital Trends Spanish

A study carried out by the universities of Leeds and Birmingham tried to determine the causes of death of trees in the Amazon. The results were published in Nature Communications and show that species-level growth rates are a key risk factor for tree mortality. In this regard, they realized that the fastest growing trees die at a younger age. This discovery is of great importance for understanding the future of forests, as climate change tends to "select" those species with the fastest growth. If these forests selected for climate change are more likely to die younger, they will also store less carbon. This study consists of the first large-scale analysis of the causes of death of trees in the Amazon and uses long-term records collected by the international network RAINFOR. "Under...
albinismo, Animales, cautiverio, color, especies, genética, habitat, India, Noticias, pigmentacion, Tendencias, tortuga, tortuga amarilla, variacion

Surprising find of a yellow turtle in India | Digital Trends Spanish

Officials from the Indian Forest Service found a rare and striking yellow turtle in Bardhaman, northeast of that country. In addition to its appearance, what is unique about this find is that it would be the second of its kind in just three months, which leads us to suppose that this group of turtles is more common than is believed. In fact, it would be a genetic anomaly, since this yellow variation of the Indian shell turtle (Lissemys punctata), has been found several times over the years in different locations in South Asia. The Lissemys punctata It is one of the most popular species of aquatic turtle and is usually brown with yellow spots. Also, its underside is creamy white. According to experts, this yellow variation is due to a lack of body pigmentation, which can be compare...
arañas, audición, cara de ogro, cazar, cornell, depredadores, escuchar, especies, estudios, insectos, investigacion, Noticias, presas, Tendencias, Universidad

Spiders develop an incredible way of hearing sounds | Digital Trends Spanish

A group of researchers at Cornell University discovered that ogre-faced spiders, named for their large eyes, have incredible night vision and are also capable of hearing their prey and predators. According to the research, which was published in Current Biology, these spiders use hairs and receptors on their legs to pick up sounds from at least two meters away. In this way they could detect low-frequency sounds coming from their prey, such as insects, as well as high-frequency sounds from predators such as birds. How did they find out? The scientists also found that, in addition to trapping prey on the ground, these arachnids are capable of grasping insects in the air, which does not appear to be related to their vision. In fact, to prove it, the researchers put dental silicone ov...
Animales, biología, China, ediacarano, especies, estudios, etapas, evolución, evolutivos, Fósiles, hallazgos, investigaciones, Noticias, organismos, restos, Tendencias

Rare Ancient Creatures Keys to Explaining Evolution | Digital Trends Spanish

An article published in Nature explains in detail how some of the oldest and most unique species provide relevant information that allows the evolution of animals to be rewritten. One of the oldest known, the Yilinga spiciformis, evidence that some animal traits appeared five hundred million years ago. When it was found last year in China, they found tracks left by this creature, which has allowed us to know about the movement it made. In fact, many call this creature "the first walker." In the same region where it was discovered, the researchers found two parallel rows of dimples. They believe they were made by an animal 550 million years ago that might be capable of burrowing and possessed multiple pairs of appendages. This would make it one of the first known animals with legs...
agua, agua salada, cocodrilo africano, cocodrilos, continente, España, especies, europa, mar, mediterraneo, Noticias, Tendencias

The African crocodile inhabited Spain 6 million years ago | Digital Trends Spanish

A study published in the Journal of Paleontology shows that crocodiles of the genus Crocodylus, of African origin, lived in Spain six million years ago. Scientists found the remains of two specimens about three meters long in the Valencian site of Venta del Moro. “The morphology of the crocodile remains from Venta del Moro is congruent with the genus Crocodylus“, Explains Ángel Hernández Luján, paleontologist at the Institut Català de Paleontología Miquel Crusafont and co-author of the work. These fossil remains are the first of Crocodylus found in the Iberian Peninsula and “unequivocally” support the non-occasional dispersal of this genus from Africa to Europe during the late Miocene, according to paleontologists. Since two individuals were found instead of one, it is suggested t...
antenas, células, especies, Noticias, organos, oscuridad, presas, radiacion infrarroja, señales, serpientes, Tendencias, ver

How snakes see so accurately in the dark | Digital Trends Spanish

Some species of snakes are capable of finding their prey with incredible ease and precision, even in the middle of the darkest night. How they did it was anyone's guess, until now. A group of researchers has discovered how they are able to convert the heat of organisms in their environment into electrical signals, which would allow them to "see" in the dark. The study, which was published in the journal Matter, offers a new explanation for this process, building on the previous work of researchers to induce pyroelectric qualities in soft materials, which would allow them to generate an electrical charge in response to mechanical stress. Thus, the authors estimate that electrical activity is likely involved in allowing snakes to detect their prey with such skill. Although they have...
aves, cráneo, dinosaurios, especies, evolución, extinción, Noticias, Tendencias

This is how birds survived the extinction of the dinosaurs | Digital Trends Spanish

About 150 million years ago, the first birds evolved from small feathered dinosaurs, similar to what we know today as birds of prey, thus becoming another branch of the dinosaur family tree. That happened in the Jurassic. For more than eighty million years, all kinds of birds emerged, and with various characteristics. Today, birds are known as "the only dinosaurs left." In hindsight, scientists are able to classify birds into avian dinosaurs, while all other types (from stegosaurus to brontosaurus) would be non-avian dinosaurs. The meteorite that fell 66 million years ago in the Yucatan Peninsula triggered the fifth mass extinction in the history of our planet. Earth became a true hell, where forest fires abounded. In total, it is estimated that 75 percent of the sp...
Animales, campos magneticos, especies, Noticias, planeta, Tendencias, tierra, tortugas

They explain how animals can detect magnetic fields | Digital Trends Spanish

We have always known that animals can perceive the Earth's magnetic fields. It is a kind of ability called magnetoreception that would allow different species to migrate over long distances, or to find their way back home. However, until now we did not know how they could do it. A study carried out by researchers from the University of Central Florida (UCF, in English) proposes a kind of compass made of microbes, which would give animals a "magnetic sixth sense" to orient themselves on Earth. The work was led by the assistant professor of the UCF Department of Biology, Robert Fitak, and included the participation of researchers from Israel and the United Kingdom. The results were published in an article by Philosophical Transactions of the Royal Society B. According ...