Missing the rarest: is the positive interspecific abundance-distribution relationship a truly general macroecological pattern?

摘要: Lepidopterists have long acknowledged that many uncommon butterfly species can be extremely abundant in suitable locations. If this is generally true, it contradicts the general macroecological pattern of positive interspecific relationship between abundance and distribution, i.e. locally are often geographically more widespread than rare species. Indeed, a negative abundance–distribution has been documented for butterflies Finland. Here we show, using Finnish as an example, results if restricted missed, may case studies based on random or sampling protocols, conducted over small spatial scales. In our case, becomes when approximately 70 per cent included. This observation suggests fact not linear entire range distributions. intriguing possibility combined with some taxonomic biases literature undermine generalization given assemblage there local regional distribution.