Susceptibility studies of malaria vectors Anopheles stephensi Liston (Diptera: Culicidae) and An. subpictus Grassi collected during 2004-2007 from various locations of Arid and Semi-Arid Zone of India were conducted by adulticide bioassay of DDT, malathion, deltamethrin and larvicide bioassay of fenthion, temephos, chlorpyriphos and malathion using diagnostic doses. Both species from all locati...

A large reservoir of bioavailable nitrogen (up to approximately 10(4) kilograms of nitrogen per hectare, as nitrate) has been previously overlooked in studies of global nitrogen distribution. The reservoir has been accumulating in subsoil zones of arid regions throughout the Holocene. Consideration of the subsoil reservoir raises estimates of vadose-zone nitrogen inventories by 14 to 71% for wa...

Considering three sites under different climate conditions (arid, semi-arid, and subhumid), this study aims to use the vadose-zone water stable isotope profiles estimate groundwater recharge rate. High-resolution vertical subsurface soil sampling along vadose zone of investigated was conducted. The collected samples were analysed determine their ratios (δ2H δ18O) that used with piston displacem...

wildlife sancturies (w.s.) according to iucn classification need less conservation, but more development plan. lavandville w.s.: (less than 1000 ha, nw of iran) is located near caspian sea and !is important as habitats for waterfowl and other birds. physical resources (sands and oyster shells) of l.w.s. are exploited ; by local people. the area also provides outdoor .recreational apportunities ...

Iran Central Plateau encompasses a large proportion of this country. The weather in these flat plains is warm and arid with very little precipitation. Different attempts in architecture have been done to alleviate the weather severity of this area and create a living place compatible with humans’ comfort criteria. Investigations have showed that some of the most successful approaches in traditi...

Rivers provide an excellent system to study interactions between patterns of biodiversity structure and ecological processes. In these environments, gene flow is restricted by the spatial hierarchy and temporal variation of connectivity within the drainage network. In the Australian arid zone, this variability is high and rivers often exist as isolated waterholes connected during unpredictable ...

Refugia featured prominently in shaping evolutionary trajectories during repeated cycles of glaciation in the Quaternary, particularly in the Northern Hemisphere. The Southern Hemisphere instead experienced cycles of severe aridification but little is known about the temporal presence and role of refugia for arid-adapted biota. Isolated mountain ranges located in the Australian arid zone likely...

Many plant species from Brazilian semi-arid present arbuscular mycorrhizal fungi (AMF) in their rhizosphere. These microorganisms play a key role in the establishment, growth, survival of plants and protection against drought, pathogenic fungi and nematodes. This study presents a quantitative analysis of the AMF species associated with Mimosa tenuiflora, an important native plant of the Caating...

Sex is by far the most predominant mode of reproduction among eukaryotes. Nevertheless, two new discoveries of asexual reproduction in a lizard and a plant from the Australian arid zone highlight an emerging trend toward the loss of sex in this region. Efforts to understand the processes leading to this pattern should provide important information about the relative advantages and disadvantages...

The seeds of Sidaovata were collected from the arid zone of Rajasthan and analysed for the characterization of the fatty acids. This paper accounted the presence of Cyclopropenoid fatty acids(Malvalic and Sterculic). The occurrence of CPFA was confirmed by HBr-titration, Halphen test, TLC, NMR and IR spectroscopic methods.