We explore the influence of spatial grain size, dispersal ability, and geographic distance on the patterns of species dissimilarity of terrestrial vertebrates, separating the dissimilarity explained by species replacement (turnover) from that resulting from richness differences. With data for 905 species of terrestrial vertebrates distributed in the Isthmus of Tehuantepec, classified into five ...

This study aimed to evaluate inequalities in the geographical distribution of human and physical resources in the health sector of Kermanshah province, Islamic Republic of Iran. In a retrospective, cross-sectional study, data from the Statistical Centre of Iran were used to calculate inequality measures (Gini coefficient and index of dissimilarity) over the years 2005-11. The highest Gini coeff...

Critical cost-efficiency index (or CCEI), proposed in Afriat (1972, 1973) and Varian (1990), is the most commonly used measure of revealed preference violations. By representing consumer preference with interval orders, as in Fishburn (1970), we show that this index is equivalent to a particular notion of the justnoticeable difference, i.e., a measure of dissimilarity between alternatives that ...

Aim We explored the range shifts of alien and native birds, responses β-diversity to abiotic factors, effect diversity on in two time periods. Location Great Britain. Time period 1968–1972, 2007–2011. Taxa studied Breeding birds. Methods estimated species between periods 1968–1972 Following, communities was by Jaccard pairwise index (βtot) partitioned into richness difference replacement compon...

Aim To understand spatial-temporal changes (beta-diversity) in coastal communities and their drivers the context of climate change. Coastal ecosystems are extremely exposed dynamic, where seaweed assemblages have been associated with changing water temperatures. However, at local scale, effects upwelling events related stressors seek further exploration. Location Galicia rías, North West Iberia...

A dissimilarity measure for shapes described by their contour, the Cyclic Dynamic Time Warping (CDTW) dissimilarity, is introduced. The dissimilarity measure is based on Dynamic Time Warping of cyclic strings, i.e., strings with no definite starting/ending points. The Cyclic Edit Distance algorithm by Maes cannot be directly extended to compute the CDTW dissimilarity, as we show in the paper. W...