Body-size evolution in Cretaceous molluscs and the status of Cope's rule
Article Abstract:
Cope's rule is an evolutionary pattern that dwells on the tendency for lineages to evolve to larger body size. However, its prevalence has been doubted due to poor understanding of the link between size and ecology and microevolution, and reported cases of evolutionary size increase being an expansion of clade's size range rather than a phyletic trend. Based on a study of body-size changes in a large sample of Cretaceous bivalves and gastropods, Cope's rule as an evolutionary generalization cannot be supported by a directional net increase or an evolutionary net decrease in body size.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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The tropics as a source of evolutionary novelty through geological time
Article Abstract:
Palaeontological analysis, both latitudinal and biogeographical studies, of post-Palaeozoic marine orders reveal that life first appeared in the tropical waters. The tropical regions are viewed as a source of evolutionary novelty and not merely a refuge where biological diversities resulted because of higher rate of survival.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1993
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Extinction: past and present
Article Abstract:
The biological attributes that govern species' vulnerability and the consequences of extinction are studied. The loss of 'redundant' species due to extinction can lead to the collapse of entire ecosystem and the extermination of great evolutionary dynasties.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
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