This study provides an analysis of vegetation and environmental relationships as well diversity patterns in sand dunes gravel desert plains northern Badrud, Iran. A total 63 species representing 49 genera 15 families were recorded. The largest Asteraceae (22.2 %) Chenopodiaceae (19.0 %). Therophytes (66.67 the dominant life form. Chronological showed 57.14 % Irano-Turani elements. Data from 60 1.5 2 m² quadrats, selected systematically randomized along three transects, collected. Both...

Variations in the phytoplankton of Zayandeh-Rood Dam Lake were studied seasonally from September 2005 to August 2006 at 4 different stations. A total 112 species and 53 genera belonging 6 divisions identified. The Bacillariophyta, Chlorophyta, Cyanophyta, Euglenophyta, Dinophyta found frequently. Chrysophyta low numbers. Cyclotella meneghinina Kütz., a centric diatom, was dominant all density between 470 150,470 cells/cm^3. According Shannon-Weaver Index, highest lowest diversities...

Biogeographic barriers for freshwater biota can be effective at various spatial scales. At the largest scale, organisms become genetically isolated by their high mountain ranges, vast deserts, and inability to cross oceans. Isolation distance of aquatic plants is expected stronger across than alongside ridges whereas heterogeneity habitats among populations temporary droughts may influence connectivity hamper dispersal. Suitable plant became reduced, even widespread submerged Potamogeton...

An efficient DNA isolation protocol specifically modified to get pure quality required for molecular studieshas been reported in this paper. Some aquatic plants (Potamogeton spp., Ceratophyllum demersum and Myriophyllum spicatum) were used the study. The developed will be useful getting high DNA. Instead of using available extraction kits, can DNA, freefrom proteins polysaccharide compounds. absorbance rate A260/A280 was 1.92 ± 0.069 A260/A230 1.73 by spectrophotometer NanoDrop machines...

Abstract Potamogeton pectinatus L. is a widespread aquatic species distributed widely in ecosystems of Iran. In this study, inter simple sequence repeat (ISSR) markers were used to assess the genetic diversity 35 accessions and 175 individuals P. collected from different regions total, 123 polymorphic DNA fragments amplified five combinations ISSR primers. The based principle coordinate analyses (PCoA) demonstrated four groups mostly corresponding with their geographic origins (North,...

Six species of Sargassum C. Agardh (Sargassaceae) with compressed primary branches, including: S. binderi Sonder, aquifolium (Turner)C. Agardh, oligocystum Montagne, swartzii crassifolium J. and cristaefolium A. were identified in the Persian Gulf Oman Sea coasts, among which is reported as newly recorded Iran for first time. The specimens collected from 15 stations along Iranian southern shores autumn, winter spring 2010 to 2012. Anatomical morphological studies performed according valid...

Capability of cyanobacterium Microcystis aeruginosa, isolated from effluent a wastewater stabilization pond, for removal cadmium and lead ions was investigated. Variation efficiency as function metal concentration, pH, temperature biomass dosage studied. Also, use closed reflux digestion technique an innovative option decomposition cyanobacterial pellet A multi-phase washing method developed in order to attain more elevated desorption efficiency. Maximum occurred pH 7, 28°C 0.2g Cd2+...

The algal flora of five stations from paddy-fields Golestan Province was investigated between October 2006 and September 2007. Eight filamentous heterocystous Nostocacean are recorded here for the first time paddy fields iran: Cylindrospermum licheniforme, stangnale, Cylindrospermopsis raciborskii, Calothrix ghosei, Gloeotrichia longiarticulata, Aulosira implexa var. crassa, Tolypothrix conglutionata var colorata, Scytonema multiramosum. stagnale, implexa, multiramosum, were dominant species...

The genus Potamogeton L. is an aquatic plant belonging to the Potamogetonaceae. Eleven species have been reported for this in Iran. This located most of water habitats country and has importance various fields such as purification polluted water, absorption heavy metals, medicinal uses. One important nodosus Poir. which shows great morphological diversity different habitats. In study, we first studied quantitative qualitative characters among populations species. Since marker may be affected...

Focusing on microalgae for nutrients removal from wastewater is interesting because of being in expensive and less sludge production. Two filamentous algae, Oscillatoria lutea Chaetophora elegans were sampled at domestic treatment, purified identified. After proliferation, samples inoculated using each alga some parameters measured defined intervals. The BOD5, COD, nitrate phosphate affected significantly by treatment with algae. was more effective reducing phosphate. highest percentage...