Dogs by Xiaoming Wang

Author:Xiaoming Wang
Language: eng
Format: epub
Tags: Science/Life Sciences/Evolution
Publisher: Columbia University Press
Published: 2011-12-06T05:00:00+00:00

The Mid-Miocene Climatic Optimum and the Second Diversification of Canids

After the initial shock of plummeting global temperatures in the early Oligocene, temperatures began to rebound modestly, but were largely stable through much of the Oligocene and into the middle Miocene (about 30 to 15 Ma). World climates during this time were still rather mild in modern terms. This stable period, with a gradual warming trend, peaked at the so-called Mid-Miocene Climatic Optimum. Although Antarctic ice first had formed at the beginning of the Oligocene (34 Ma), the ice caps during that epoch were small, located mostly on the high Antarctic plateau, and highly dynamic (fluctuating with time). By the end of the middle Miocene (14 Ma), another drastic drop in temperature occurred, this time with the formation of a permanent Antarctic ice sheet. This fall in temperature precipitated a massive response from plant communities.

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