Didelphis virginiana Quick Facts Common Name: Virginia opossum, North American opossum The family Didelphidae originated in the Cretaceous and today is most diverse in South America. Didelphis virginiana was the last South American mammal to disperse into temperate North America during t
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A team of researchers from the U.S. and Mexico has found bone skeletons at the bottom of the Hoyo Negro cave that show that some animals thought to have existed only in South America also existed in Mexico. In their paper published in the journal Biology Letters, the group describes their recovery and study of multiple skeletons retrieved from the floor of the Hoyo Negro cave and what they learned from them. The Hoyo Negro cave is located on the eastern coast of the Yucatán Peninsula in Mexico.
El registro tiene como finalidad censar a los animales de compañía y otorgar a los dueños beneficios en clínicas y hospitales veterinarios de gobierno
This study aims at assessing resource and habitat use, niche occupation and trophic interactions from a stable isotope perspective on fossil mammals from the Argentine Pampas during the Great American Biotic Interchange (GABI). We present stable isotope data of more than 400 samples belonging to 10 mammalian orders and spanning a temporal range from ~9.5 Ma to ~12 ky. Rodents, notoungulates and pilosians record an increase in the consumption of C4 plants, whereas litopterns and cingulates show δ13C values that remain mostly within a C3-dominated diet. Our stable isotope data indicates that the expansion of C4 vegetation opened up new niche opportunities, probably alleviating resource competition among endemic taxa. Gomphothere, equid and camelid δ13C records show a broad variability pointing to consumption of C3 and mixed C3-C4 vegetation. This flexible dietary behavior may have facilitated the successful settlement of immigrant groups in South America. In the case of carnivorous taxa, Late Miocene pre-GABI endemic sparassodonts consumed prey from C3 environments, whereas immigrant carnivorans preferred prey from mixed C3-C4 areas. Our research contributes to the study of the GABI from a different perspective as stable isotope records permit to characterize, from a (semi)quantitative standpoint, ecological traits within extinct fauna.
Didelphis virginiana Quick Facts Common Name: Virginia opossum, North American opossum The family Didelphidae originated in the Cretaceous and today is most diverse in South America. Didelphis virginiana was the last South American mammal to disperse into temperate North America during t
White Wolf Pack released an article on Wednesday highlighting the contributions of Chef Brian Yazzie of Sioux Chef. "Chef Brian Yazzie is a full-time chef %
PCP PIRE students participated in the Cruisin' The Fossil Freeway exhibit opening at the Florida Museum of Natural History on Saturday 4th February 2012. The students worked in the live prep lab on fossils that were collected from various localities of the Panama Canal. The students also hosted a table display of North and South American fossils with the intent to showcase their theme "Biotic Interchange: Swapping Places".
Aunque el gato no es originario de México, si no que del continente europeo, este felino junto con el perro
When the Panamanian land bridge formed around 3 million years ago, Southern Mexico was in the middle of a great biotic interchange of large animals from
Abiotic factors in a lake ecosystem include non-living components such as light, temperature, pH of the water and oxygen content. Biotic factors include living components of a lake such as bacteria, phytoplanktons, aquatic plants, zooplankton, crustaceans, molluscs, insects, fish and other vertebrates.
STIR speaks with American artist Robert Steven Connett to shed light on his preternatural paintings.
Un video se ha vuelto viral en las redes sociales, mostrando a un perrito llegando a su casa en Tijuana; al verlo se dieron cuenta que tenía marcadas las cejas y la cara.
This is a simple cut and paste activity that includes vocabulary from Ecosystems. It also includes biomes and their description. Words include: Biotic, Abiotic, American Grasslands, Decomposer, Nocturnal, Consumer, Producer, Herbivore, Carnivore, Sun, Omnivore, Temperate Deciduous Forest, Marine Biome, Coniferous Forest-Taiga, Tundra, Tropical Rainforest, Desert, African Grassland, Camouflage
STIR speaks with American artist Robert Steven Connett to shed light on his preternatural paintings.
More than 10,000 years ago spectacularly large mammals roamed the pampas and jungles of South America. This book tells the story of these great beasts during and just after the Pleistocene, the geological epoch marked by the great ice ages. Megafauna describes the history and way of life of these animals, their comings and goings, and what befell them at the beginning of the modern era and the arrival of humans. It places these giants within the context of the other mammals then alive, describing their paleobiology--how they walked; how much they weighed; their diets, behavior, biomechanics; and the interactions among them and with their environment. It also tells the stories of the scientists who contributed to our discovery and knowledge of these transcendent creatures and the environment they inhabited. The episode known as the Great American Biotic Interchange, perhaps the most important of all natural history \"experiments,\" is also an important theme of the book, tracing the biotic events of both North and South America that led to the fauna and the ecosystems discussed in this book.
