. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DYNAMIC MODEL OF SPECIES-ABUNDANCES 153 15 10 #spp n n n abundance 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75 Figure 1. A typical species-abundance distribution (McCabe and Weber. 1994). of these species cannot change the shape or formula of the distribution, only its parameter values. It follows that when we apply the veil curve to the lognormal distribution, we must get a new. complete lognormal distribution, not a truncated one. The metastudy reported in this paper compares two the- oretical p
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DYNAMIC MODEL OF SPECIES-ABUNDANCES 153 15 10 #spp n n n abundance 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75 Figure 1. A typical species-abundance distribution (McCabe and Weber. 1994). of these species cannot change the shape or formula of the distribution, only its parameter values. It follows that when we apply the veil curve to the lognormal distribution, we must get a new. complete lognormal distribution, not a truncated one. The metastudy reported in this paper compares two the- oretical proposals for the distribution of species abundance in natural settings. But it does not even consider the log- normal distribution: if the lognormal were present in nature, the first abundance categories would have to be smaller than succeeding ones. Not one case of this has turned up in the 50 randomly selected biosurveys used in the metastudy. This observation, coupled with the new sampling theory, means that the lognormal distribution, as a descriptor of abundances in natural settings, is effectively dead. A closely related distribution, the negative binomial (Pielou, 1975), also uses the veil line concept and suffers from the same unrealistic shape when unveiled, so to speak. This distribution is therefore also not considered in the metastudy and for the same reasons. It is no longer usable as # spp. curve veil line lognormal distribution abundance. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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