منابع مشابه
Synchronous extinction of North America's Pleistocene mammals.
The late Pleistocene witnessed the extinction of 35 genera of North American mammals. The last appearance dates of 16 of these genera securely fall between 12,000 and 10,000 radiocarbon years ago (approximately 13,800-11,400 calendar years B.P.), although whether the absence of fossil occurrences for the remaining 19 genera from this time interval is the result of sampling error or temporally s...
متن کاملEcological correlates of range shifts of Late Pleistocene mammals.
Understanding and predicting how species' distributions will shift as climate changes are central questions in ecology today. The late Quaternary of North America represents a natural experiment in which we can evaluate how species responded during the expansion and contraction of the glaciers. Here, we ask whether species' range shifts differ because of taxonomic affinity, life-history traits,...
متن کاملA Quantitative Assessment of the Range Shifts of Pleistocene Mammals
Much attention has been focused on the response of species to the climate change associated with the last deglaciation during the Pleistocene. Generally, species respond in an individualistic manner to climate change, and expand and contract their ranges independently; consequently, community composition is extremely variable over time. Although data are available to examine range shifts of spe...
متن کاملDmd053694 274..281
This study investigated the metabolism of salvianolic acid A (SAA) both in vivo and in vitro. Liquid chromatography–mass spectrometry analysis of drug-containing rat bile samples and bile samples hydrolyzed by glucuronidase revealed a series of methylated conjugates of SAA and its glucuronides, as well as the predominance of the methylation pathway of SAA in rats. For the first time, four major...
متن کامل281-284 Donovan
Volume 28, Number 6, November/December 1996 volving Church-run institutions. In May 1996, a Catholic health care facility in Troy, New York, agreed, as part of an out-ofcourt settlement, to provide referrals and follow-up for family planning and contraceptive sterilization services. This settlement brought to a close the nation’s first case to challenge the merger of a sectarian and a nonsectar...
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ژورنال
عنوان ژورنال: Iowa Geological Survey Annual Report
سال: 1914
ISSN: 2160-5270,2160-5300
DOI: 10.17077/2160-5270.1139