Sentences with phrase «with widespread extinctions»

Although the underlying causes are unclear, the onset of the PETM about 56 million years ago was rapid, occurring within a few thousand years, and ecological consequences were large, with widespread extinctions in both marine and terrestrial ecosystems.

Not exact matches

A review of the fossil record, they said, shows that rarity of previously abundant organisms is the only factor tied with certainty to the widespread ecological change observed across extinction boundaries, and because of this, the magnitude and extent of rarity may provide the best comparison of the current biotic crisis to those of the past.

For the first time ever, scientists have documented a widespread extinction of bees that occurred 65 million years ago, concurrent with the massive event that wiped out land dinosaurs and many flowering plants.

A sudden widespread decline of frogs, with extinction of entire mountain - restricted species attributed to global warming [105]--[106], provided a dramatic awakening.

Global climate change risks are high to very high with global mean temperature increase of 4 °C or more above preindustrial levels in all reasons for concern (Assessment Box SPM.1), and include severe and widespread impacts on unique and threatened systems, substantial species extinction, large risks to global and regional food security, and the combination of high temperature and humidity compromising normal human activities, including growing food or working outdoors in some areas for parts of the year (high confidence).

Given that 34 % of the world's conifer species today are vulnerable or threatened with extinction (Fi.3 in 49), implementation of the Montreal Protocol may have prevented widespread conifer decline and potentially extirpations.

So Nature published Pounds» more adamant connection to CO2 in «Widespread amphibian extinctions from epidemic disease driven by global warming».17 Embodying the forceful storyteller Pounds boldly stated, «we conclude with «very high confidence» (> 99 %, following the Intergovernmental Panel on Climate Change, IPCC) that large - scale warming is a key factor in the disappearances.

If, that is, we want a good chance of avoiding the dismal future that Bill Hare, an accomplished scientist and the godfather of Greenpeace's climate campaign, has so carefully warned us about: Unstable weather, routine heat waves, widespread drought, crop failure, and mass extinction, rising sea levels, and, in general, a markedly more hostile environment and a situation that our society, as presently constituted, is unlikely to navigate with grace and aplomb.

It is driving the rapid depletion of fossil fuel resources with a dramatic increase in associated emissions and consequent climate change; it is accelerating the loss of biodiversity and widespread extinction of species; it is intensifying the growing shortage of fresh water to meet human needs.