[Distribution patterns of the North Holarctic hepatics]

(revitalizing silk road corridor in the region (north east of iran

introruction khawf in(iran)-herat and mazaresharif and shirkhan bandar in (afghanistan)-dushanbe in (tajikistan)_(kirgizstan)-kashghar in(china) project railway network is under construction that it is as a significant corridor for revitalizing silk road corridor in the region .at the present there are three different gauge in the region central asia with 1,520 mm gauge and turkey-islamic repu...

Ecology of asexual reproduction in hepatics

Prevalence and Patterns of Congenital Limb Defects in the North of Iran (2007-2011)

Background: Congenital limb defects (CLDs) are the leading cause of disability across the world.CLDsvary depending on the anatomical location, type, and cause of anomaly. The present study aimed to evaluate the prevalence and patterns of CLDs in the North of Iran. Methods: This descriptive-analytical, hospital-based study was conducted in three hospitals in Gorgan, the capital of Golestan Prov...

New insights into the distribution of polyploid Daphnia: the Holarctic revisited and Argentina explored.

It has long been known that polyploid organisms are more prevalent in arctic than in temperate environments. Past explanations for this geographical trend have focused on the role of glacial cycles in generating polyploids and the influence of abiotic factors in favouring polyploidy in the north. In combination, these mechanisms probably suffice to explain the observed geographical cline in plo...

Multiple scale composition and spatial distribution patterns of the north-eastern Minnesota presettlement forest

1 Bearing tree data were used to characterize the composition and spatial structure of the southern boreal presettlement forest in north-eastern Minnesota, United States of America. Data collected during the General Land Office Survey (GLO) between 1853 and 1917, represents 35 324 samples (each with 1–4 trees) in a 3.2 million-hectare landscape. Nine tree species contributed at least 1% to the ...