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."
Download ebook Warren D. Allmon - Species and Speciation in the Fossil Record in PDF, DJVA better understanding of this bioenergy crop will greatly facilitate the efforts towards managing large-scale cultivation, developing novel agronomic, genetic, genomic and molecular as well as chemical and bioengineering tools for enhanced biomass production and bioconversion.This book searches for the answers to these questions.Introductory chapters discuss conservation issues and modern techniques of tree-growing as well as a background to the species accounts.Plant User Handbook is for practitioners who are professionally engaged in the use of plants in public, commercial and institutional landscapes.He defines the relationship between aesthetic behavior, on the one hand, and species attitudes and the personalization of ethnic groups, on the other, and undertakes a sweeping aesthetic analysis from visceral perception to figurative art, including a discussion of the "language of forms" that makes figurative art an abstract expression of language., AndrA(c) Leroi-Gourhan (1911-1986) was an anthropologist and paleontologist whose theoretical endeavors extended well beyond those realms to encompass the culture of the twentieth century and its most advanced developments.Organized as a "walk through time" and featuring species from 15 important fossil sites, this book is the most extensive and richly illustrated volume devoted exclusively to the Cenozoic mammals of South America.Owen's eye for detail and range of scholarship are evident in this work, which is an extensive catalogue of mammals based on biological, geographical and anatomical characteristics.In the past, studies have been proposed using a micro-scale at the grain level to perform change of scale, but limitations have been proven for these approaches.
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