A Gradual Morphologic Transition During A Rapid Speciation Event In Marginellid Gastropods Neogene
Download A Gradual Morphologic Transition During A Rapid Speciation Event In Marginellid Gastropods Neogene full books in PDF, epub, and Kindle. Read online free A Gradual Morphologic Transition During A Rapid Speciation Event In Marginellid Gastropods Neogene ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author | : Ross H. Nehm |
Publisher | : |
Total Pages | : |
Release | : 1994 |
Genre | : |
ISBN | : |
We document a speciation event between two species of prunum (Marginellidae: Gastropoda) in pliocene strata of the northern Dominican Republic. The ancestral species, P. coniforme, is widely distributed in the mio-pliocene of the Dominican Republic and Jamaica, and has a range of at lcast 1 1 m.y. The descendant species, P. christineladdae, is endemic to the northern Dominican Republic. The ancestral species persists after its descendant arises. The transition between species is marked by stratigraphic and morphologic intermediates, and occurs during and interval estimated to be between 73.000 and 275.000 years (representing 0.6-2.5 percent of the duration of the ancestral species). although the transition takes more than a geologic instant, the overall pattern of morphologic change is best described by the model of punctuated equilibrium. The change between species apparently involved a habitat shift into deeper water, and occurred during acdelerated deepening. All of the neogene Dominican species of Prunum appear to have had depth-defined ranges.
Author | : Alan H. Cheetham |
Publisher | : University of Chicago Press |
Total Pages | : 424 |
Release | : 2001-08 |
Genre | : Science |
ISBN | : 9780226389301 |
With all the recent advances in molecular and evolutionary biology, one could almost wonder why we need the fossil record. Molecular sequence data can resolve taxonomic relationships, experiments with fruit flies demonstrate evolution and development in real time, and field studies of Galapagos finches have provided the strongest evidence for natural selection ever measured in the wild. What, then, can fossils teach us that living organisms cannot? Evolutionary Patterns demonstrates the rich variety of clues to evolution that can be gleaned from the fossil record. Chief among these are the major trends and anomalies in species development revealed only by "deep time," such as periodic mass extinctions and species that remain unchanged in form for millions of years. Contributors explore modes of development, the tempo of speciation and extinction, and macroevolutionary patterns and trends. The result is an important contribution to paleobiology and evolutionary biology, and a spirited defense of the fossil record as a crucial tool for understanding evolution and development. The contributors are Ann F. Budd, Efstathia Bura, Leo W. Buss, Mike Foote, Jörn Geister, Stephen Jay Gould, Eckart Hâkansson, Jean-Georges Harmelin, Lee-Ann C. Hayek, Jeremy B. C. Jackson, Kenneth G. Johnson, Nancy Knowlton, Scott Lidgard, Frank K. McKinney, Daniel W. McShea, Ross H. Nehm, Beth Okamura, John M. Pandolfi, Paul D. Taylor, and Erik Thomsen.
Author | : Douglas H. Erwin |
Publisher | : Columbia University Press |
Total Pages | : 542 |
Release | : 1995 |
Genre | : Science |
ISBN | : 9780231082488 |
A collection of case studies that seeks to reexamine the understanding of the speciation patterns that appear in the fossil record through an analysis of the patterns and their presumed processes. In each case, the rigorous techniques of morphological analysis, quantitative genetic analysis, phylogenetic analysis, and sedimentary completeness have been employed.
Author | : Warren D. Allmon |
Publisher | : University of Chicago Press |
Total Pages | : 434 |
Release | : 2016-10-05 |
Genre | : Science |
ISBN | : 022637758X |
Although the species is one of the fundamental units of biological classification, there is remarkably little consensus among biologists about what defines a species, even within distinct sub-disciplines. The literature of paleobiology, in particular, is littered with qualifiers and cautions about applying the term to the fossil record or equating such species with those recognized among living organisms. In Species and Speciation in the Fossil Record, experts in the field examine how they conceive of species of fossil animals and consider the implications these different approaches have for thinking about species in the context of macroevolution. After outlining views of the Modern Synthesis of evolutionary disciplines and detailing the development within paleobiology of quantitative methods for documenting and analyzing variation within fossil assemblages, contributors explore the challenges of recognizing and defining species from fossil specimens—and offer potential solutions. Addressing both the tempo and mode of speciation over time, they show how with careful interpretation and a clear species concept, fossil species may be sufficiently robust for meaningful paleobiological analyses. Indeed, they demonstrate that the species concept, if more refined, could unearth a wealth of information about the interplay between species origins and extinctions, between local and global climate change, and greatly deepen our understanding of the evolution of life.
Author | : Ross H. Nehm |
Publisher | : Springer Science & Business Media |
Total Pages | : 324 |
Release | : 2008-03-21 |
Genre | : Science |
ISBN | : 1402082150 |
Here, a diverse group of geologists and paleobiologists focus their attention on the richly fossiliferous Neogene stratigraphic sections of the Dominican Republic. They provide an updated geological framework and a series of novel studies of evolutionary stasis and change among different lineages and associated ecological communities. This collection of studies illustrates the immense potential of collaborative, multidisciplinary, and field-based paleobiological research.
Author | : Arthur J. Boucot |
Publisher | : CRC Press |
Total Pages | : 941 |
Release | : 2010-04-12 |
Genre | : Nature |
ISBN | : 143985923X |
In this complete and thorough update of Arthur Boucot's seminal work, Evolutionary Paleobiology of Behavior and Coevolution, Boucot is joined by George Poinar, who provides additional expertise and knowledge on protozoans and bacteria as applied to disease. Together, they make the Fossil Behavior Compendium wider in scope, covering all relevant ani
Author | : Stephen Jay GOULD |
Publisher | : Harvard University Press |
Total Pages | : 408 |
Release | : 2009-06-30 |
Genre | : Science |
ISBN | : 0674037847 |
In 1972 Stephen Jay Gould took the scientific world by storm with his paper on punctuated equilibrium. Challenging a core assumption of Darwin's theory of evolution, it launched the controversial idea that the majority of species originates in geological moments (punctuations) and persists in stasis. Now, thirty-five years later, Punctuated Equilibrium offers his only book-length testament on a theory he fiercely promoted, repeatedly refined, and tirelessly defended.
Author | : Stephen Jay Gould |
Publisher | : Harvard University Press |
Total Pages | : 1460 |
Release | : 2002-03-21 |
Genre | : Science |
ISBN | : 0674417925 |
The world’s most revered and eloquent interpreter of evolutionary ideas offers here a work of explanatory force unprecedented in our time—a landmark publication, both for its historical sweep and for its scientific vision. With characteristic attention to detail, Stephen Jay Gould first describes the content and discusses the history and origins of the three core commitments of classical Darwinism: that natural selection works on organisms, not genes or species; that it is almost exclusively the mechanism of adaptive evolutionary change; and that these changes are incremental, not drastic. Next, he examines the three critiques that currently challenge this classic Darwinian edifice: that selection operates on multiple levels, from the gene to the group; that evolution proceeds by a variety of mechanisms, not just natural selection; and that causes operating at broader scales, including catastrophes, have figured prominently in the course of evolution. Then, in a stunning tour de force that will likely stimulate discussion and debate for decades, Gould proposes his own system for integrating these classical commitments and contemporary critiques into a new structure of evolutionary thought. In 2001 the Library of Congress named Stephen Jay Gould one of America’s eighty-three Living Legends—people who embody the “quintessentially American ideal of individual creativity, conviction, dedication, and exuberance.” Each of these qualities finds full expression in this peerless work, the likes of which the scientific world has not seen—and may not see again—for well over a century.
Author | : Dolph Schluter |
Publisher | : OUP Oxford |
Total Pages | : 302 |
Release | : 2000-08-31 |
Genre | : |
ISBN | : 0191588326 |
Adaptive radiation is the evolution of diversity within a rapidly multiplying lineage. It can cause a single ancestral species to differentiate into an impressively vast array of species inhabiting a variety of environments. Much of life's diversity has arisen during adaptive radiations. Some of the most famous recent examples include the East African cichlid fishes, the Hawaiian silverswords, and of course, Darwin's Gal--aacute--;pagos finches,. This book evaluates the causes of adaptive radiation. It focuses on the 'ecological' theory of adaptive radiation, a body of ideas that began with Darwin and was developed through the early part of the 20th Century. This theory proposes that phenotypic divergence and speciation in adaptive radiation are caused ultimately by divergent natural selection arising from differences in environment and competition between species. In The Ecology of Adaptive Radiation the author re-evaluates the ecological theory, along with its most significant extensions and challenges, in the light of all the recent evidence. This important book is the first full exploration of the causes of adaptive radiation to be published for decades, written by one of the world's best young evolutionary biologists.
Author | : Scott Lidgard |
Publisher | : |
Total Pages | : 362 |
Release | : 1992 |
Genre | : Biology |
ISBN | : |