Skip to content

Permian-Triassic mass extinction by global warming

Originally posted on Dear Kitty. Some blog: This July 2018 video says about itself: 252 million years ago 96% of all marine species and 70% of terrestrial vertebrate species vanished, this was the Permian extinction. From the University of Washington in the USA: Biggest mass extinction caused by global warming leaving ocean animals gasping for breath December 6, 2018 Summary: By combining ocean models, animal metabolism and fossil records, researchers show that the Permian mass extinction in the oceans was caused by global warming that left animals unable to breathe. As temperatures rose and the metabolism of marine animals sped up, the warmer waters could not hold enough oxygen for their survival. The largest extinction in Earth’s history marked the end of the Permian period, some 252 million years ago. Long before dinosaurs, our planet was populated with plants and animals that were mostly obliterated after a series of massive volcanic eruptions in Siberia. Fossils in ancient seafloor rocks display a thriving and diverse marine ecosystem, then a swath of corpses. Some 96 percent of marine species were wiped out during the “Great Dying”, followed by millions of years when life had to multiply and diversify once more. What has been debated until now is exactly what made the oceans inhospitable to life — the high acidity of the water, metal and sulfide poisoning, a complete lack of oxygen, or simply higher temperatures. New research from the University of…

Read More →

Eastern meadowlarks sing in Florida, USA

Originally posted on Dear Kitty. Some blog: This video from the USA says about itself: Eastern Meadowlarks singing two different flute like songs and foraging for food on the vast St John’s Marshland in Florida. These birds are just gorgeous and their song a winter delight – note the blooming mass of swamp sunflowers – filmed on December 4th, 2018 with: Canon SX60 HS.

Read More →

Lonesome George, other Galápagos tortoises, new research

Originally posted on Dear Kitty. Some blog: This 27 February 2018 video says about itself: Galápagos Tortoise Movement Ecology Programme The film captures the hidden mystery of the lives of giant tortoises, among the longest lived vertebrates on earth. It illustrates the diverse ecological roles played by Galápagos tortoises and how the environment has shaped complex yet predictable patterns on movement, morphology and ecological relationships among tortoises across the Galápagos Archipelago. It demonstrates how a team of conservation biologists developed and implemented a research programme that revealed the hitherto unknown secret lives of Galápagos tortoises – one of the earth’s most iconic wildlife species. It documents the movement ecology of tortoises, their feeding ecology, their role as ecosystem engineers, and their pivotal role in ecosystems. Touching on their conservation history from the time humans discovered the islands, and how humans will determine the fate of tortoises and their habitats. It demonstrates how scientific research can inform conservation management, and highlight the importance of pure and applied research toward understanding and conserving the tortoises and the ecosystems they shape. From Yale University in the USA: In death, Lonesome George reveals why giant tortoises live so long December 3, 2018 Lonesome George’s species may have died with him in 2012, but he and other giant tortoises of the Galápagos are still providing genetic clues to individual longevity through a new study by researchers at Yale University, the University of Oviedo in…

Read More →