prior to being transported into the lake system. The combinaThe accuracy of Arctic lake chronologies has been assessed by tion of these factors commonly leads to radiocarbon ages measuring the C activities of modern carbon sources and that are apparently too old. Discrete macrofossils are rarely applying these isotopic mass balances to dating fossil lake materifound in sufficient quantities for...

Wastewater treatment plants (WWTPs) release treated effluent containing mobile genetic elements (MGEs), antibiotic resistance genes (ARGs), and microorganisms into the environment, yet little is known about their influence on nearby microbial communities and the retention of these factors in receiving water bodies. Our research aimed to characterize the genes and organisms from two different WW...

Elham AHMADI*, Seyed Ali POURBAKHSH, Malahat AHMADI, Alireza TALEBI Department of Microbiology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran Department of Poultry Diseases, Razi Vaccine and Serum Research Institute, Karaj, Iran Department of Microbiology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran Department of Clinical Sciences, Faculty of Veterinary Medicin...

abstract identification & supervision of fluctuations in physical ecosystems have a special place in optimum using of natural resources. urmia lake is the largest interior natural lake of iran which its potentials and ecosystem & environmental characteristics attracted researchers and environmental planners attention. fluctuations in area and perimeter of the lake attracted many attentions in r...

   Urmia Lake is one of the two large hypersaline lakes in the world which have Artemia. It is located in northwest of Iran. Due to a decrease in water inflow and volume, the salinity of Urmia Lake has reached to more than 300 g.l-1 since 2001. The increased salinity has greatly influenced biological aspects of the lake, and caused the lake undergoes at critical conduction. The aim of the prese...

Species identification of copepods in lake sediments is often difficult because their remains lack diagnostic features. It is therefore not easy to track changes in copepod biodiversity in lakes through time. We report a method for the isolation, amplification, and identification of copepod DNA from whole lake sediments formed in the early Holocene to the present. The method, which involves amp...

Previous studies conducted on the hydrography, chemical and biological characteristics of Lake Edku; one of the northern Nile Delta Lakes, concluded that this lake suffered from a high level of eutrophication, due to the heavy load of nutrients, especially phosphorus. Before deciding what type of treatment should be used for decreasing total phosphorous (TP), knowledge of the sources and sinks ...

Identification of the sources of organic matter in sedimentary records provides important paleolimnologic information. As the types and abundances of plant life in and around lakes change, the composition and amount of organic matter delivered to lake sediments changes. Despite the extensive early diagenetic losses of organic matter in general and of some of its important biomarker compounds in...