abstract         background and objective: microalgae are a group of algae that produce biochemical products consisting of a wide range of carbohydrates, lipids and proteins that are commercially valuable. interest in microalgal cultivation is currently blossoming globally. species of dunaliella are found in freshwater, euryhaline habitats of all continents, oceans including the dead sea and ev...

Eleven prairie saline (conductivity 1.8-58.8 mS cm-‘) lakes were examined over the 1994 growing season to determine what salinity-related factor or factors were responsible for controlling phytoplankton standing crops. The study lakes were characterized by high total P (0.15-24.2 mg liter-‘), total N (3.75-12.35 mg liter-‘), total Fe (552,800 p,g liter-‘), dissolved organic C (40-195 mg liter-l...

a r t i c l e i n f o Keywords: Lake Malawi Ostracoda Lake levels Climate change Ostracod species from at least seven genera were recovered from drill cores recently collected at Lake Malawi, a large (29,500 km 2) and deep (706 m) African rift valley lake located in the southern African tropics (9–14° S). Allocypria? and an unknown Cypridosine. Taphonomic variables such as the percentage of val...

Plants may induce small-scale heterogeneity in soil nutrients, forming fertile islands. However, this process may depend on plant spices, plant developmental stages and habitat conditions. Vegetation cover in arid and semi-arid regions is mostly in the form of plant patches and bare soil of inter-patch areas, this form of vegetation cover can be useful to study plants impact on soil to get appl...

kashan aquifer is adjacent to salt lake. because of this adjacency, the saline water of the lake has moved to the aquifer. in this study groundwater quality of the aquifer was simulated using artificial neural network (ann) model. for this purpose, the dominant ion of water was first determined by piper diagram. results showed that the sodium chloride is the dominant ion of water and so it was ...

there is a little room for doubt that lake urmia, which is the second largest permanent hyper saline lake in the world,is currently suffering from a lack of appropriate management strategy. accordingly, this study was done using the swotmatrix to analyze the key factors affecting declining water levels and increasing salinity. results of group decisionmakingby brainstorming among a group of exp...

It is widely accepted that biodiversity is lower in more extreme environments. In this study, we sought to determine whether this trend, well documented for macroorganisms, also holds at the microbial level for bacteria. We used denaturing gradient gel electrophoresis (DGGE) with phylum-specific primers to quantify the taxon richness (i.e., the DGGE band numbers) of the bacterioplankton communi...

(1) Background: Recently, secondary soil salinization has frequently occurred in ecological water conveyance and irrigation areas. Therefore, monitoring the information on area analyzing change process of are great significance to both environmental improvement management. (2) Methods: This study takes Shiyang River’s terminal lake—Qingtu Lake—and its surroundings as research area. The index wa...