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How to introduce connectance in a frame of an expression for diversity Margalef, Ramon, 1919-2004 Gutiérrez Merino, Emilia Ecosistemes Entropia Models matemàtics Biotic communities Entropy Mathematical models Systems made of parts that are totally connected do not work, neither ecosys- tems nor artifacts. Relative connectance is inversely related to diversity, and both magnitudes can find a common frame of expression, in which some constant expressing the constraints of any organization might be embodied. If S is Simp- son's index, the expression (1 - S)IS as a measure of diversity offers some advantages or, at least, helps further reasoning. Such expression is the ratio between total interspecific possible interactions and possible intraspecific inter- actions. 2013-11-04T14:03:53Z 2013-11-04T14:03:53Z 1983 2013-11-04T14:03:53Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: http://www.jstor.org/stable/2460866 American Naturalist, 1983, vol. 121, num. 5, p. 601-607 (c) University of Chicago Press, 1983 info:eu-repo/semantics/openAccess University of Chicago Press Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)