Read e-book online Evolution and Ecology: The Pace of Life PDF

By K. D. Bennett

ISBN-10: 0511608594

ISBN-13: 9780511608599

ISBN-10: 0521390281

ISBN-13: 9780521390286

ISBN-10: 0521399211

ISBN-13: 9780521399210

The mechanisms of macroevolutionary swap are a contentious factor. Paleoecological proof, offered during this ebook, exhibits that evolutionary methods noticeable in ecological time can't be used to foretell macroevolutionary traits, opposite to Darwin's unique thesis. the writer discusses how climatic oscillations on ice-age timescales are paced by way of diversifications within the Earth's orbit, and feature therefore been an everlasting characteristic of Earth background. there's, besides the fact that, little facts for macroevolutionary swap according to those climatic alterations, suggesting that over geological time, macroevolution doesn't ensue because of collected brief time period strategies. those conclusions are used to build a postmodern evolutionary synthesis within which evolution and ecology play an equivalent position. Written by way of a number one paleoecologist, this booklet can be of curiosity to researchers in either ecology and evolutionary biology.

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Evolutionary 'synthesis' A single decade saw the appearance of a series of books that have been acknowledged as cornerstones of a * modern synthesis' of evolutionary theory. Three (Dobzhansky 1937; Mayr 1942; Simpson 1944) are central to the amalgamation of the new science of mathematically-based population genetics (Fisher 1930; Wright 1931; Haldane 1932) with Darwinian evolution as practised in animal systematics and palaeontology, while Huxley (1942) gave the approach a name, and Stebbins (1950) extended it to plant systematics.

1). However, there are many intricacies in the way that the modern synthesis became established. These are developed in the following sections. A more detailed review is provided by Eldredge (1985). Genetics Theodosius Dobzhansky (1900-1975) was a Russian-born American geneticist. His book, Genetics and the Origin of Species (Dobzhansky 1937), showed how the relatively new knowledge of genetics could be combined with a theory of evolution. Much of the work is, in fact, a genetics textbook, but written from an evolutionary point of view.

These processes, operating together or separately, greatly increase the potential for sympatric speciation, and hence reduce the relative importance of isolation and allopatric mechanisms for speciation among plants. The study of Quaternary climatic changes was beginning to advance by 1950, but still had no reliable and accurate time-scale (see page 41). It was clear, however, that there had been repeated phases of glaciation, and Stebbins (1950) made full use of this knowledge. The book has numerous references to Quaternary events and their significance for plant distribution and evolution, and Stebbins was thus probably the first major contributor to the modern synthesis to appreciate the extent to which climatic changes might influence the course of evolution.

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Evolution and Ecology: The Pace of Life by K. D. Bennett

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