Sentences with phrase «during global extinction»

Not exact matches

In their study, the researchers produced the first global analysis and relatively fine - grained mapping of all the large mammals (with a body weight of at least 10 kg) that existed during the period 132,000 - 1,000 years ago — the period during which the extinction in question took place.

But researchers from the University of Geneva (UNIGE), Switzerland, working alongside the University of Zurich, discovered that this extinction took place during a short ice age which preceded the global climate warming.

In the first global analysis of extinctions during the Pleistocene geological epoch, Sandom et al. found that the expansion of humans out of Africa most likely caused the extinctions over the past 100,000 years.

Through phylogenetic analysis, the research team discovered that modern deep - sea mussels are the descendants of shallow - water mussels, and their ancestors migrated to the deep sea approximately 110 million years ago, providing evidence to support a hypothesis that their ancestors survived through an extinction event during the global anoxia period associated with the Palaeocene - Eocene Thermal Maximum which occurred around 57 million years ago.

It seems likely that ozone depletion contributed to the major extinctions that took place during these warm global periods.

It seems likely that ozone depletion contributed to the major extinctions that took place during these warm global periods.

The release of this trapped methane is a potential major outcome of a rise in temperature; it is thought that this is a main factor in the global warming of 6 °C that happened during the end - Permian extinction as methane is much more powerful as a greenhouse gas than carbon dioxide (despite its atmospheric lifetime of around 12 years, it has a global warming potential of 72 over 20 years and 25 over 100 years).

In September 2007, during a presentation at United Nations headquarters in New York, he declared that «20 - 30 % of plant and animal species [are] at risk of extinction» due to global warming.

During the Permian / Triassic mass extinction, 95 percent of species on the earth perished, apparently from runaway global warming.

Yet Another Failed Global Warming Prediction of Extinction Main New Study: Hottest Temperatures For Arabian Sea Recorded During Roman & Medieval Periods»

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The rise of CO2 that led to this dramatic acidification occurred during the Paleocene - Eocene Thermal Maximum (PETM), a period when global temperatures rose by around 5 °C over several thousand years and one of the largest - ever mass extinctions in the deep ocean occurred.