abstractthe aim of this study was to determine the ecology of the ostracoda species in the sediments collected from the erdek bay and to observe the relationship between ecological parameters with the number of ostracoda species and individual numbers. sediment and water samples have been collected seasonally from 8 stations of the study area from six different depths (0.3; 1; 5; 10; 20; 30 m)....

Species distribution models are frequently used to predict species occurrences in novel conditions, yet few studies have examined the consequences of extrapolating locally collected data to regional landscapes. Similarly, the process of using regional data to inform local prediction for species distribution models has not been adequately evaluated. Using boosted regression trees, we examined er...

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 the positive interspecific relationship between abundance and distribution, i.e. locally abundant species are often geographically more widespread than locally rare species. Indeed, a negative...

Scaling phenomena are at the core of a great variety of ecological processes ranging from individual physiology to population, community and ecosystems, and emerge as the result of the operation of general principles governing their structure and functioning. In this chapter, we assess the generality of scaling relationships in the distribution and abundance of species by comparing invasive exo...

reports on distribution and abundance of bats from iran exist since mid-nineteen century, but studies on this subject are very scarce and have been conducted very infrequently by european biologists who visited iran occasionally. until now, six caves have been investigated and eight species of cave-dwelling bats have been reported from ilam province in south-western iran. the present paper has ...

If the fraction of species in area A that are also found in one-half of that area is independent of A, the distribution of species is self-similar and a number of observed patterns in ecology, including the widely cited species-area relationship connecting species richness to censused area, follow. Self-similarity also leads to a species-abundance distribution, which deviates considerably from ...

This study supports the hypothesis that species tend to become rarer towards the limits of their geographic distribution. Over-all species abundance is positively correlated with the size of the area occupied. However, body size is a weak predictor of the abundance of benthic fish species. It is suggested that habitat complexity, competition or other factors regulate patterns of species abundance.