Thanks decimon and gleeaikin.
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Posted on 12/26/2011 1:07:37 PM PST by decimon
Rise and fall of groups of fauna driven by temperature
PROVIDENCE, R.I. -- History often seems to happen in waves – fashion and musical tastes turn over every decade and empires give way to new ones over centuries. A similar pattern characterizes the last 65 million years of natural history in North America, where a novel quantitative analysis has identified six distinct, consecutive waves of mammal species diversity, or "evolutionary faunas." What force of history determined the destiny of these groupings? The numbers say it was typically climate change.
"Although we've always known in a general way that mammals respond to climatic change over time, there has been controversy as to whether this can be demonstrated in a quantitative fashion," said Brown University evolutionary biology Professor Christine Janis. "We show that the rise and fall of these faunas is indeed correlated with climatic change – the rise or fall of global paleotemperatures – and also influenced by other more local perturbations such as immigration events."
Specifically, of the six waves of species diversity that Janis and her Spanish collaborators describe online this week in the Proceedings of the National Academy of Sciences, four show statistically significant correlations with major changes in temperature. The two transitions that show a weaker but still apparent correlation with the pattern correspond to periods when mammals from other continents happened to invade in large numbers, said Janis, who is the paper's senior and second author.
(Excerpt) Read more at eurekalert.org ...
Fauna graph ping.
Soooooo, climate changes naturally and the world doesn’t end. Who’da thunk it??
Ping to SC
LIES! ALL LIES!
Everyone KNOWS that the climate was 100% stable and unchanging until 1910 when the evil Automobile was created as the consumer of the Sludge-of-Satan - oil.
/s
They had to tag this on in order to receive the Fulbright Grant.
Exactly! bttt
They had to tag this on in order to receive the Fulbright Grant.
Something like that. Gotta wonder if they believe it or if they know to play the game.
No, this proves that humans have been around (and messing up the world) for 65 million years.
The greatest question IS...
Did the third human on this planet come from two other ones(originals)..?
IF not.. you MUST make up a bodacious TALE to justify that position..
Follow the money?
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| GGG managers are SunkenCiv, StayAt HomeMother & Ernest_at_the_Beach | |
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Thanks decimon and gleeaikin. |
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Not possible.
Climate change is only about 120 years old.
Al Gore and sundry other fake "scientists" say so.
Caption: This painting by artist Carl Buell depcits a scene from the late Eocene of North America. The rhino‑like animals in the background are brontotheres. The pony‑sized Hyracodon, a closer relative of living rhinos, in the foreground.
It’s true. I’ve heard Helen Thomas say that’s what it was like when she was younger. /s
Global climate during the Late Eocene was warmer than today. Ice had just begun to form at the South Pole. India was covered by tropical rainforests, and Warm Temperate forests covered much of Austrlia.
The Eocene Epoch contained a wide variety of different climate conditions that includes the warmest climate in the Cenozoic Era and ends in an icehouse climate. The evolution of the Eocene climate began with warming after the end of the Palaeocene-Eocene Thermal Maximum (PETM) at 56 million years ago to a maximum during the Eocene Optimum at around 49 million years ago. During this period of time, little to no ice was present on Earth with a smaller difference in temperature from the equator to the poles. Following the maximum, was a descent into an icehouse climate from the Eocene Optimum to the Eocene-Oligocene transition at 34 million years ago. During this decrease ice began to reappear at the poles, and the Eocene-Oligocene transition is the period of time where the Antarctic ice sheet began to rapidly expand.
“It is a craven act of obeisance to a spurious orthodoxy.”
Pure poetry.
Terrific and very useful graphics. Thanks for posting.
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