Implications of an exceptional fossil flora for Late Cretaceous vegetation
Article Abstract:
An increase in the vegetational dominance (1-3) during the Late Cretaceous period has been attributed to the rapid radiation of angiosperms. Studies conducted on the Big Cedar Ridge flora in Wyoming, USA, revealed that dicotyledonous angiosperms resulted in 61% increase, while 12% constituted the vegetational cover. A comparative study in the mid-Maastrichtian areas indicates that areas away from streams and those covered with ferns were not affected by dicots.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1993
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Low-down on a land bridge
Article Abstract:
The vegetation on the Bering land bridge (Beringia) was of tundra rather than steppe type during the last glaciation. Plant microfossils in peat from mires under marine sediments in the Bering and Chukchi Seas are of the tundra type. The mammal bones found in Beringia probably belong to individuals who moved far from optimum habitats due to overpopulation. The peat contains information from the early glacial age to about 11,000 years before the present age.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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124,000-year periodicity in terrestrial vegetation change during the late Pliocene epoch
Article Abstract:
A high-resolution continental record of late Pliocene climate change is presented, providing details of how the terrestrial vegetation responded to the change. Spectral analyses of lake sediment records from Pula maar in Hungary indicated terrestrial responses to solar radiation, with the strongest response at a period of 124 kyr. The record show that internally driven nonlinear responses at that period were as important as external forcing.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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