منابع مشابه
Conversations about Phanerozoic Global Diversity
-The emergence of Phanerozoic global diversity as a central theme of investigation has resulted from a confluence of factors, including the assembly by several researchers of global taxonomic databases; the advent of computers, which permitted construction and analysis of global Phanerozoic diversity trajectories; and the recognition that Phanerozoic diversity trends are important bellwethers o...
متن کاملLimits to randomness in paleobiologic models: the case of Phanerozoic species diversity.
The question of how random, or unconstrained, paleobiologic models should be is examined with a case study: Signor's (1982, 1985) inverse calculation of levels of marine species diversity through the Phanerozoic. His calculation involved an ingenious model that estimated species numbers and species abundances in the world oceans of the past by correcting known numbers of fossil species for vari...
متن کاملPhanerozoic trends in the global diversity of marine invertebrates.
It has previously been thought that there was a steep Cretaceous and Cenozoic radiation of marine invertebrates. This pattern can be replicated with a new data set of fossil occurrences representing 3.5 million specimens, but only when older analytical protocols are used. Moreover, analyses that employ sampling standardization and more robust counting methods show a modest rise in diversity wit...
متن کاملPhanerozoic taxonomic diversity: a test of alternate models.
1. K. R. L. Hall, Curr. Anthropol. 4, 479 (1963). 2. Specific examples of tool use by birds: A. Alcock, Ibid 112, 542 (1970); A. H. Chisholm, ibid. 96, 380 (1954); D. Lack, Sci. Amer. 188, 66 (April 1953); H. B. Lovell, Wilson Bull. 70, 280 (1957); G. C. Milliken and R. I. Bowman, Living Bird 6, 23 (1967); J. van Lawick-Goodall Nature 212, 1468 (1966); and H. van Lawick, Nat. Geogr. Mag. 133, 6...
متن کاملPlant Species Diversity in Gonabad
Gonabad located at Khorasan Razavi and coordinates 580 30’ N 34o 35’ E. The highest point of the zone belongs to Peak of Siah Mountain (height of 2,863 meters above sea level) and the lowest place has height of 810 meters above sea level, which is located in North West in salt desert. The mean temperature of the warmest and coldest of year is 29.3 and 3.9 respectively. Mor...
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ژورنال
عنوان ژورنال: The Paleontological Society Special Publications
سال: 1996
ISSN: 2475-2622,2475-2681
DOI: 10.1017/s2475262200001817