02294nas a2200265   4500008004100000245011100041210006900152260001200221300001200233490000700245520153200252653002601784653001901810653001101829653001401840653001701854653001201871653001401883653002401897653001701921653001701938100001701955700002101972856003501993       1999                        eng d00aBetween-group differences in the Iberian dung beetle species-area relationship (Coleoptera : Scarabaeidae)0 aBetweengroup differences in the Iberian dung beetle speciesarea   cNov-Dec  a587-5970 v203 aBetween-group alpha- and beta-diversity differences were derived from species-area relationships fitted to field data. The accuracy of spatial richness variation predictions based on area size was also checked. The log-log model (log S = c + z log A) was found to be the best-fit linear model, with slopes (z) ranging from 0.089 to 0.142. Between-group comparisons of z (slope) and q (intercept) parameters, using the S = q + cA(Z) curvilinear regression model, corroborated early results, indicating a lower beta-diversity (slope) for Scarabaeinae than for Geotrupinae and Aphodiinae. The latter group, probably more sensitive to environmental heterogeneity, should contribute more to species richness in large areas. alpha-Diversity is greater for Aphodiinae, more relevant to local diversity (1 km(2)), than for Scarabaeinae and considerably greater for these two groups than for Geotrupinae. As earlier results show that the richness of a single dung pat is rather more a function of the Scarabaeinae species pool, richness on dung pat scales is probably due more to the between-dropping mobile Scarabaeinae, while Aphodiinae contribute mainly to local and regional pool richness. Nearly 88 % of the total richness variance is explained by area size. This percentage decreases to 37 % when the spatial structure of area size and species number are extracted. The corresponding figures for Scarabaeinae, Aphodiinae and Geotrupinae are 44, 22 and 31 %, respectively. (C) 1999 Editions scientifiques et medicales Elsevier SAS.10aAPHODIUS SCARABAEIDAE10abeta-diversity10aCURVES10adiversity10aDung beetles10aIberian10aPeninsula10arichness comparison10aScarabaeidae10aspecies-area1 aLobo, J., M.1 aMartin-Piera, F.  u<Go to ISI>://000084618100002 