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      The Nonconcept of Species Diversity: A Critique and Alternative Parameters.

      Ecology
      JSTOR

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          Abstract

          The recent literature on species diversity contains many semantic, conceptual, and technical problems. It is suggested that, as a result of these problems, species diversity has become a meaningless concept, that the term be abandoned, and that ecologists take a more critical approach to species-number relations and rely less on information theoretic and other analogies. As multispecific collections of organisms possess numerous statistical properties which conform to the conventional criteria for diversity indices, such collections are not intrinsically arrangeable in linear order along some diversity scale. Several such properties or "species composition parameters" having straightforward biological interpretations are presented as alternatives to the diversity approach. The two most basic of these are simply ▵1 =[n/n-1][1-Σi (N _i/_N)2 ] =the proportion of potential interindividual encounters which is interspecific (as opposed to intraspecific), assuming every individual in the collection can encounter all other individuals, E(Sn ) = Σi [1-(N-Nin )/(Nn )] =the expected number of species in a sample of n individuals selected at random from a collection containing N individuals, S species, and Ni individuals in the ith species.

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          Author and article information

          Journal
          Ecology
          Ecology
          JSTOR
          0012-9658
          0012-9658
          Jul 1971
          : 52
          : 4
          Article
          10.2307/1934145
          28973811
          e4874fb1-8147-4e21-8fe0-24e34d187f9a
          History

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