extinction – आवारा मुसाफिर

Huge chunk of plants, animals in U.S. at risk of extinction

February 9, 2023759 Views

A leading conservation research group found that 40% of animals and 34% of plants in the United States are at risk of extinction, while 41% of ecosystems are facing collapse. Everything from crayfish and cacti to freshwater mussels and iconic American species such as the Venus flytrap are in danger of disappearing, a report released on Monday found. NatureServe, which analyzes data from its network of over 1,000 scientists across the United States and Canada, said the report was its most comprehensive yet, synthesizing five decades' worth of its own information on the health of animals, plants and ecosystems. FILE PHOTO: A full moon rises over a cactus in Phoenix, Arizona February 2, 2015. REUTERS/Lucy Nicholson Importantly, the report pinpoints the areas in the United States ...

खबरनामाघटनाएंमेडागास्कर

It would take 23 million years for evolution to replace Madagascar’s endangered mammals

AWARA MUSAFIR BUREAU

January 13, 2023707 Views

“Now or never” for preventing extinction In many ways, Madagascar is a biologist’s dream, a real-life experiment in how isolation on an island can spark evolution. About 90% of the plants and animals there are found nowhere else on Earth. But these plants and animals are in major trouble, thanks to habitat loss, over-hunting, and climate change. Of the 219 known mammal species on the island, including 109 species of lemurs, more than 120 are endangered. A new study in Nature Communications examined how long it took Madagascar’s unique modern mammal species to emerge and estimated how long it would take for a similarly complex set of new mammal species to evolve in their place if the endangered ones went extinct: 23 million years, far longer than scientists have found for any other isla...

खबरनामाघटनाएं

A fifth of world’s reptile species deemed threatened with extinction

AWARA MUSAFIR BUREAU

April 27, 2022924 Views

About a fifth of reptile species - from the Galapagos tortoises to the Komodo dragon of the Indonesian islands, from West Africa's rhinoceros viper to India's gharial - are threatened with extinction, researchers said on Wednesday in the first comprehensive global status assessment for reptiles. The study examined 10,196 reptile species including turtles, crocodilians, lizards, snakes and the tuatara, the only surviving member of a lineage dating back more than 200 million years. They found that 21% of species are critically endangered, endangered or vulnerable to extinction as defined by the International Union for Conservation of Nature (IUCN), the global authority on the status of species. They also identified 31 species that already have gone extinct. FILE PHOTO: A reptile curat...

केन्याखबरनामाघटनाएं

Black Rhino extinction risk sharply increased by killing of specific female rhinos

AWARA MUSAFIR BUREAU

April 14, 2022388 Views

New research from The University of Manchester, in collaboration with Kenyan conservationists and scientists, has examined data from the Critically Endangered Kenyan black rhino populations which suggest that individuals really matter when assessing the impact of poaching on species’ survival chances. The research published today in journal, Proceedings of the Royal Society B, demonstrates that poaching combined with individual rhino’s reproductive variance, or how successful mums are at raising young, leads to a greater than first thought risk to the survival of the black rhino. In the case of these rhino, reproductive variance increased extinction risk by as much as 70% when combined with poaching. Within black rhino populations (and most likely in most animals), some indiv...

खबरनामाघटनाएं

Humans hastened the extinction of the woolly mammoth

AWARA MUSAFIR BUREAU

November 13, 2021449 Views

New research shows that humans had a significant role in the extinction of woolly mammoths in Eurasia, occurring thousands of years later than previously thought. An international team of scientists led by researchers from the University of Adelaide and University of Copenhagen, has revealed a 20,000-year pathway to extinction for the woolly mammoth. “Our research shows that humans were a crucial and chronic driver of population declines of woolly mammoths, having an essential role in the timing and location of their extinction,” said lead author Associate Professor Damien Fordham from the University of Adelaide’s Environment Institute. “Using computer models, fossils and ancient DNA we have identified the very mechanisms and threats that were integral in the initial decline ...