Tuesday, 20 November, 2018

These were the only birds that survived the dinosaur-killing asteroid

These were the only birds that survived the dinosaur-killing asteroid These were the only birds that survived the dinosaur-killing asteroid
Theresa Hayes | 27 May, 2018, 02:38

The plant fossil record shows that the asteroid caused global deforestation and extinction of most flowering plants, destroying the habitats of tree-dwelling animals.

Dr Daniel Field of the University of Bath said, 'We drew on a variety of approaches to stitch this story together. The possibility of enduring the asteroid was now slim for tree-dwelling birds; removing their environment made sure termination. "The cascading effect of our conclusion is that carbon dioxide emissions would have been, perhaps, ten years, and the warming lasted 100,000 years", explained the study's lead author Ken MacLeod, a paleontologist at the University of Missouri.

"After a disaster like a forest fire or a volcanic eruption, the first plants to come back are the fastest colonizers-especially ferns", Dunn said.

" To me, it's actually unbelievable to see that integrating insights from the bird fossil record and the plant fossil record can enable us to piece together a significant macroevolutionary story that occurred over 66 million years back", Daniel Field, lead research study author and an evolutionary paleontologist at the University of Bath's Milner Centre for Development, wrote in an e-mail.

Additional co-authors of the study are Antoine Bercovici of the Smithsonian Institution, Jacob Berv of the Cornell Lab of Ornithology, Regan Dunn of the Field Museum of Natural History, Tyler Lyson of the Denver Museum of Nature and Science, David Fastovsky of the University of Rhode Island, and Vivi Vajda of the Swedish Museum of Natural History. Spores are much smaller sized than seeds, and they can quickly grow in a moist location. Some have suggested those with toothless beaks were better at eating seeds and grains, which would have more easily survived in the apocalyptic landscape than the plants that made them. "To see them, we take a sample of rock from the time frame just after the collision and dissolve it in acid".

The study, appearing in the journal Current Biology, determined the destruction of the world's forests, by looking at microscopic fossils of pollen and spores.

Scientists studying plant life around the extinction event that killed the dinosaurs have made a surprising discovery: Out of all the birds living at the time, only the ground-dwelling species survived.

These were the only birds that survived the dinosaur-killing asteroid

This seems to match with their reconstructions, which show that the birds that survived the extinction event had ground-dwelling features, such as relatively long legs. Tree-dwelling birds have delicate legs that are designed for perching on branches, and they had no place left to live.

" Today, birds are the most varied and internationally prevalent group of terrestrial vertebrate animals- there are nearly 11,000 living types", Field stated in a declaration.

"Only a handful of ancestral bird lineages succeeded in surviving the mass extinction event 66 million years ago, and all of today's unbelievable living bird diversity can be traced to these ancient survivors", he said. "They are primary producers, they make energy available to all life forms by capturing it from the sun - we can't do that", he said.

Dunn also emphasized that the loss of life resulting from the mass extinction 66 million years ago is relevant today.

"This place is known for having a lovely record across the interval that we are looking at - the so called Cretaceous-Paleogene boundary - the mass extinction event following the Chicxulub impact", MacLeod added.

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