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Van Valen's ‘law’

Van Valen's ‘law’ When plotted as cumulative curves on a logarithmic scale, the duration frequencies of many species tend to show a more or less straight-line relationship with time. In effect, taxa generally become extinct regardless of their age. Duration frequencies vary greatly among different groups (e.g. on average, bivalve genera last 10 times longer than mammalian genera). The ‘law’ is named after its discoverer, L. Van Valen.

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"Van Valen's ‘law’." A Dictionary of Zoology. . Encyclopedia.com. 21 Nov. 2017 <http://www.encyclopedia.com>.

"Van Valen's ‘law’." A Dictionary of Zoology. . Encyclopedia.com. (November 21, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/van-valens-law-0

"Van Valen's ‘law’." A Dictionary of Zoology. . Retrieved November 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/van-valens-law-0

Van Valen's ‘law’

Van Valen's ‘law’ When plotted as cumulative curves on a logarithmic scale, the duration frequencies of many species tend to show a more or less straight-line relationship with time. In effect, taxa generally become extinct regardless of their age. The ‘law’ is named after its discoverer, L. Van Valen.

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"Van Valen's ‘law’." A Dictionary of Plant Sciences. . Encyclopedia.com. 21 Nov. 2017 <http://www.encyclopedia.com>.

"Van Valen's ‘law’." A Dictionary of Plant Sciences. . Encyclopedia.com. (November 21, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/van-valens-law

"Van Valen's ‘law’." A Dictionary of Plant Sciences. . Retrieved November 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/van-valens-law