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Livres Livres 1 - 10 sur 18 pour A species is a lineage (or a closely related set of lineages) which occupies an adaptive....
" A species is a lineage (or a closely related set of lineages) which occupies an adaptive zone minimally different from that of any other lineage in its range and which evolves separately from all lineages outside its range. "
Horticultural Reviews - Page 14
de Jules Janick - 2002 - 496 pages
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The Structure of Biological Science

Alexander Rosenberg - 1985 - 281 pages
...This last notion has been called the ecological species notion. According to van Valen, its proponent, a species is a lineage (or a closely related set of...lineage in its range and which evolves separately from all lineages outside its range. . . . An adaptive zone is some part of the resource space together...
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The Growth of Biological Thought: Diversity, Evolution, and Inheritance

Ernst Mayr - 1982 - 974 pages
...Valen (1976: 233) to base a species definition on niche occupation: "A species is . . .a lineage . . . which occupies an adaptive zone minimally different from that of any other lineage in its range." This reflects the principle of competitive exclusion, but is not very practical as a species definition...
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Introduction to the Principles of Plant Taxonomy

V. V. Sivarajan - 1991 - 292 pages
...acts primarily on phenotypes, which are the building blocks of a community. He defines a species as 'a lineage (or a closely related set of lineages)...adaptive zone minimally different from that of any other lineages outside its range'. A lineage is an ancestor-descendant sequence of populations and an adaptive...
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Apomixis in Plants

Sven Asker, Lenn Jerling - 1992 - 320 pages
...believed evolution to be largely controlled by ecological processes, extended Simpson's55 definition: "A species is a lineage (or a closely related set...lineage in its range and which evolves separately from all lineages without its range." Species thus exist as units because they have descended from common...
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The Units of Evolution: Essays on the Nature of Species

Marc Ereshefsky - 1992 - 405 pages
...evolves separately from all lineages outside its range, or a closely-related set of lineages which occupy an adaptive zone minimally different from that of any other lineage in their range and which evolve separately from all lineages outside their range. This rewording gives...
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Species Evolution: The Role of Chromosome Change

Max King - 1995 - 336 pages
...primarily on genotypes. Thus, Van Valen's ecological view of an evolutionary species was defined as: A lineage (or a closely related set of lineages) which...lineage in its range and which evolves separately from all lineages outside its range (Van Valen, 1976, p. 233). Van Valen also added the following qualifications:...
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Species, Species Concepts and Primate Evolution

William H. Kimbel, Lawrence B. Martin - 1993 - 560 pages
...as a modification of Simpson's ESC, emphasizing the ecological niche: "A species is a lineage . . . which occupies an adaptive zone minimally different...lineage in its range and which evolves separately from all lineages outside its range." [More recently Van Valen (1988) has adopted a more eclectic concept...
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Plant Variation and Evolution

David Briggs, Stuart Max Walters - 1997 - 512 pages
...ecological elements in a species definition, van Valen (1976) considered species to be: 'A lineage (or closely related set of lineages) which occupies an...lineage in its range and which evolves separately from all lineages outside its range'. Many biologists are fascinated by the possibility of discovering the...
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The Greeks and the Environment

Laura Westra, T. M. Robinson - 1997 - 230 pages
...working, in an analytic tradition, to define an ecological species concept. ("A species is a lineage . . . which occupies an adaptive zone minimally different...lineage in its range and which evolves separately from all lineages outside its range.") E. Van Valen, "Ecological Species, Multispecies, and Oaks," Taxon...
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Endless Forms: Species and Speciation

Daniel J. Howard, Stewart H. Berlocher - 1998 - 470 pages
...the ecological individual. An ecological species is a "lineage 1or closely related set of lineages1 which occupies an adaptive zone minimally different...lineage in its range and which evolves separately from all lineages outside its range" tVan Valen 1976. p. 233i, where "an adaptive zone is some part of the...
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