bagh vang section is located at about 45 km to the northwest of tabas and south of shirgesht areas. in bagh vang section, the permian deposits of the jamal formation with a thickness of 270 m are underlain by the sardar formation disconformably. the formation is also transitionally and conformably overlain by lower triassic deposits of sorkh shale formation. a total of 124 rock samples have bee...

Coral reefs are globally important marine ecosystems as sites of high biotic diversity. Reef flat sediments are reasonably homogeneous in composition. This substratum is subject to gradients in water motion, grazing pressure and benthic productivity. This study used DNA fingerprinting techniques, automated rRNA intergenic spacer analysis (ARISA), and terminal restriction fragment length polymor...

Marine bacterioplankton dominate microbial carbon biomass in surface waters of the oligotrophic ocean, yet there have been few studies examining rates of change in bacterioplankton assemblage composition in situ over time and across water masses. Temporal changes in bacterioplankton assemblage composition were investigated during 7 drifter studies of 24 to 360 h duration in the oligotrophic Gul...

Islands are ideal for investigating processes that shape species assemblages because they are isolated and have discrete boundaries. Quantifying phylogenetic assemblage structure allows inferences about these processes, in particular dispersal, environmental filtering and in-situ speciation. Here, we link phylogenetic assemblage structure to island characteristics across 393 islands worldwide a...

We designed a field survey (the entire river length; not dammed: First and Second plateaus; dammed: Third Plateau) to test the hypothesis that the cascade of reservoirs promoted a reduction in species richness and changed the composition of Oligochaeta assemblage along the Iguaçu River. Changes in environmental variables and in richness and composition of Oligochaeta were summarized by Canonic ...

Some species have disproportionate influence on assemblage structure, given their numbers or biomass. Most examples of such "strong interactors" come from small-scale experiments or from observations of the effects of invasive species. There is evidence that entire avian assemblages in open woodlands can be influenced strongly by individual species over very large areas in eastern Australia, wi...

Maskrays of the genus Neotrygon (Dasyatidae) have dispersed widely in the Indo-West Pacific being represented largely by an assemblage of narrow-ranging coastal endemics. Phylogenetic reconstruction methods reproduced nearly identical and statistically robust topologies supporting the monophyly of the genus Neotrygon within the family Dasyatidae, the genus Taeniura being consistently basal to N...