مقالات رزومه علی عابدینی

8 sites were selected in different wetlands of Guilan province to survey the habitat preference of invasive water hyacinth (Eichhornia crassipes). At each site, a set of environmental variables (physico-chemical and structural variables in the given ecosystems) was seasonally and simultaneously sampled with 32 biological instances (16 presence samples and 16 absence samples of water hyacinth) during one year study period (2016-2017). The results of Mann-Whitney test showed that there was a significant difference between presence/absence of water hyacinth and electric conductivity, flow velocity, turbidity and bicarbonate (p < 0.01 for the first three variables and p < 0.05 for bicarbonate), while no significant difference was observed between the presence and absence of water hyacinth and other variables (p > 0.05 for all variables). Based on the results of the principal component analysis, electric conductivity, water turbidity and flow velocity were the most influential varaibles in the first to third components (more than 82 % of the total variations were related to these three components) so these variables had the major effect on the habitat suitability of water hyacinth in the wetlands. The results of generalized linear model showed that there was a significant difference between the presence and absence of water hyacinth in the sampling sites and electric conductivity, flow velocity, water turbidity and bicarbonate (p < 0.05 for bicarbonate and p < 0.01 for other 3 variables).

Lake of the Martyrs of the Persian Gulf (also known as the Chitgar Lake) is located in the north-western of Tehran. The construction of this artificial lake was done by Tehran Municipality was filled water of the Kan River in 2012. TN, TP, SD and Chl-a was used to determine trophic levels. Water sampling was performed by Rotner sampler and the water quality was investigated on 5 stations site during 2013-2019. Standard methods were used for Analysis of water parameters. To determine the difference between mean of the studied parameters, the One-way ANOVA variance analysis test and Duncan mean pair test was used, and the confidence level was 95%. Based on the study, the results indicated that during 2013-2019 the mean yearly EC was 432±65 µs/cm, pH was 7.79±0.45 and SD was 3.7±0.9 meter. The mean yearly of dissolve oxygen, total phosphorous, total nitrogen, respectively, were 8.3±1.4, 0.041±0.015, 2.828±1.342 as mg/l and chlorophyll-α was 5.2±2.7 µg/l. During the months under study, the water temperature varied between 5.8±0.4 to 28.9±0.2 as °C. The ratio of total nitrogen to total phosphorus was more than 30 which indicated phosphorus is limiting factor in the lake Eutrophication. Based on multivariate evaluation method, during 2013-2019 mean of TSI was 40.6±6.3 with range of 29-50. In the early years, TSI was oltraoligotrogh and during 2016-2017 the eutrophication state close to the mesotrophic state and then it has almost returned to its original level during the downward trend after the summer of 2018. Introducing fishes and refinery performance are two main factors that have contributed to the declining level of eutrophication in the lake.

The spatial salinity patterns which give a picture of the area affected by eutrophication and trophic status changes at the ecosystem. The aim of this study was to determine the area affected by freshwater eutrophication using trophic level (TRIXcs), the risk of eutrophication (UNTRIX) and the nutrient-salinity scatter diagram. Also, the data of the present study are compared with previous year of studies. This research was conducted during 2018 to 2019 in eight transects and at 5, 10 and 30 meter depths of Iranian coasts of southern Caspian Sea. The results showed that mean seasonal changes of TRIXcs and UNTRIXcs were 4.94-5.59 and 3.57-4.17, respectively, which the highest trophic level and risk of eutrophication was observed in summer season. In addition to, trophic level (TRIXcs) risk of eutrophication (NUTRIX=4.30) of near the coast (5m depth) were high. Mean of TRIXcs and UNTRIX between different regions (western, middle and eastern) were not significant. In the present study, the maximum amounts of ammonium and soluble silica near the west coast were recorded in Anzali transect and also under the influence of the largest river Sefidrud in the southern shores of the Caspian Sea, but the points with maximum NOx and phosphate values were observed in the east (Amirabad and Bandar-e-Turkmen transects). The nonlinear relationship between NOx, NH4, DIP and DSi with salinity indicates that river flow and water mixing were affected nutrient concentration and changes of trophic levels in the study area.

Water quality index is a tool that integrates data of effective factors on water quality. The final result of the index provides simple understanding of water quality for general people. Regarding the importance and application of water quality index in decision making of active and executive units in conservation and exploitation, the present study was conducted for the first time in the southern of Caspian Sea. The aims of paper are to determine: the environmental parameters which are important in water quality, determining weight (wi) of parameters affecting water quality index and sub-indices (qi) of each important parameters of Caspian Sea water quality index (WQIcs). This research will provide the specific and necessary information and data for calculating the water quality index in this aquatic ecosystem. The provided wi and qi were applied for water quality index calculating of the Caspian Sea data in 2018-2019. Using Principal Component Analysis results on long-term data 2003-2019 years (920 water samples), 9 important parameters (turbidity, chlorophyll-a, BOD5, COD, pH, DO%, NO3, NH4 and PO4) were determined for WQIcs and indicator weighting (wi) of each parameter was determined. The sub-index (qi) of each parameter was calculated based on standards threshold, coastal water quality requirements in marine ecosystems and reference value data of Caspian Sea. Finally, by calculating the geometric mean, the value of water quality index in the Caspian coastal waters was obtained. The application of this formula in 2018-2019 showed that 74 and 26% of WQIcs were in the range of 70-91 (medium class) and 35-69 (bad class), respectively. Among the 9 parameters mentioned above, nitrate and phosphorus (the factors of trophic enrichment) had the greatest effect on decreasing water quality index.

, Cheshmehkileh River and its branches in the southern Caspian Sea region display an important role in migration and breeding of Caspian fishes. In this study the hydro chemical parameters were monthly sampled in 13 stations. The results showed that the mean values of water temperature, Electrical Conductivity and pH were 12.2±4.7 ºC, 369±67 μS/Cm and 8.24±0.16, respectively. The mean values of total Hardness, Dissolved Oxygen, Phosphate, N-Nitrate. N-Nitrite, Bicarbonate were 185±25, 9.7±0.9, 0.024±0.029, 0.567±0.284, 0.006±0.006 and 183±68 ppm, respectively. Some parameters such as Ca, Mn, CO3, HCO3, CO2 and Chloride were not significantly different between stations (p>0.05). The water quality index (NSFWQI) varied between 63 and 75 in different stations. According to WQI, Cheshmeh Kileh River was classified as poor to good water quality. The environmental considerations are recommended to decrees of pollutant sources along Cheshmehkileh Rive

In this study the biotic and abiotic characteristics of Ardalan dam reservoir was studied from 2011 to 2012. Diatoms, Bacillariophyta, was the main phylum of phytoplankton in Ardalan dam reservoir that was dominant in the most seasons and green algae, Chlorophyta, was the second dominance groups. Survey of zooplanktons showed there were 25 genus from 6 phylum, and Rotatoria constitute 64% of the zooplanktons in. The average phytoplankton and zooplankton abundance during this study were about 19.15×106 and 1863 per liter of lake water respectively. Survey of benthic communities showed that Chironomidae and Tubificidae were the main benthic groups in Ardalan dam. Average of benthic biomass during this survey was 0.9 gr/m2 which is very poor. Sediments in Ardalan dam was mostly of silt and clay. Fish structure survey by gill nets in Ardalan dam showed that common carp and silver carp, by %53 and %45 respectively were the main economical species in the dam. Hydro chemical survey showed that total phosphorus and total nitrogen were 0.073 and 0.779 mg/L respectively. The amount of chlorophyll a was 6.03 mg/m3. The range `of dissolved oxygen was 6.4-10.5 mg/L. Average of EC was 576 µs/cm. Since the water temperature just in august month was more than 20ºC, the appropriate period for warm water fish culture in this reservoir is limited

Anzali wetland is one of the most important ecosystem for fishes spawning and zooplankton groups are the first consumer in this ecosystem .They are the perfect food for the larvae of fishes. Zooplankton status was evaluated in 10 stations of different areas of the Anzali wet land during March 2014 to February2015. Sampling was done by tube (PVC) and passing through of 30 micron planktonic net. The samples were identified and counted by invert microscope. A total of 72 Genus of phylum Actinopoda, Rhizopoda, Ciliophora,, Rotatoria, Arthropoda, Gastrotricha, Mollusca, Tardigrada, Nematoda, Porifera, Annelida) were identified. The results showed that the maximum and Minimum annual average density of zooplankton was observed with 9667± 12383 and 312 ± 1539 ind.lit-1 in Komeh Sheijan station and West Wetlands Center station Respectively.The population was more in the summer than in other season phylum of Rotatoria, Rhizopoda, Ciliophora and superclass Copepoda formed 59, 8,30 and 3 percent of the density respectively. According to the results the populationof zooplankton is ncreased compared to past studies. According to the statistical analysis Kruskal Wallis there were not significant differences between density of zooplankton in different stations, months and seasons (p > 0.05), but significant differences were found in between different phylum (p < 0.05). Overall, the results showed that the Anzali wetland has Eutroph condition.

This study was carried out to evaluate the effect of floating and sinking pellets on growth performance of common carp (Cyprinus carpio). Triplicate groups of 624 carp (average  initial weight 175 g) were stocked in 6 round concrete pond with a density 1/8 kg/m3 and fed to apparent satiation, 4 times a day with interval of 4 h for 75 days. The growth rate of fish was estimated by feeding the extruded and pellet feeds 122.63 and 77.43g respectively. Fish were fed from two type of feed in this culture system had a high survival rate (97-99.5%). Thus, high survival rate of carp in concrete ponds indicate its easy adaptation to new cultural conditions. The results showed that growth and nutrition parametrs included in:weight gain (WG%), specific growth rate (SGR), protein efficiency ratio (PER) increased and food conversion ratio (FCR) decreased significantly when they were fed on floating pellets compared with the fish fed on sinking pellets (p<0/05). Thus, the results showed that carp, despite the oral form and feeding habits of the bed, can easily feed on the floating pellets and have better growth performance.

Anzali wetland is one of the most important wetlands in the southern coast of the Caspian Sea which is under the influence of the brackish water of the Caspian Sea and the freshwater rivers entering it. Therefore, it plays important role as an exclusive ecotone. Physicochemical conditions and trophic levels of the Anzali Wetland were evaluated monthly from May 2014 to May 2015. Trophic State Index (TSI) was calculated based on the evaluation of chlorophyll a, total phosphorus (TP), total nitrogen (TN) and water transparency. The results showed that the average annual amounts of total nitrogen, total phosphorus and dissolved oxygen were 1.023±0.523, 0.113±0.105 and 8.71±2.63 mgL-1, respectively. The amounts of total nitrogen were not significantly different among various research locations (P>0.05), whereas the amounts of total phosphorus were significantly different among various research locations (P

The aim of this investigatin is study of some biological and physico-chemical parameters of the river water into the Anzali wetland and comparison with international standards.The Samples collected in the summer and fall of 1390 and conducted monthly.Heterotrophic microorganisms were isolated in plate count agar, enterococci in kf agar and coliforms and E. coli in Chromagar ECC agar and Maccangi agar. After 48 to 72 hours of incubation at 30 ° C were identified and counted. Water physicochemical parameters were also studied and noted. Most of the logarithmic mean change in total bacteria (7.07 cfu / ml ), total coliform (6.537 cfu / ml), fecal coliforms (4.96 cfu / ml ) and fecal streptococci (3.649 cfu / ml) at station No. 6 (river Pir Bazar ) was in summer(P

The Taham dam reservoir is a mountainous lake with 317 ha near to Zanjan. This study have been focused on biotic and abiotic factors of this lake. The results showed the less abundance of phytoplankton with 2×106 l-1 where abundant of zooplankton was 266 l-1. Bacillariophyta and Chlorophyta belong to phytoplankton and Rotatoria belong to zooplankton were dominated among identified plankton phyla. There were identified 45 and 32 genera of phytoplankton and zooplankton respectively. There were identified 5 groups of benthos that Tubificidae, Hirudina had the most frequency. The ichtiology survey showed presence of 6 species in the lake that Alburnoides bipunctatus, Capoeta capoeta,, Leuciscus cephalus were the most abundance in the materials. L. cephalus was observed with the maximum size of 870 gr. The hydro chemical results indicated low phosphorus values while total nitrogen was varied from 0.3 to 0.6 mg l-1. Chl-a was varied from 7.9 to 25.9 µg l-1. The oxygen amount was 4.5 to 8.4 even in 65 meter depths. The Carlson trophic model showed that the Taham lake is at early stage of mesotrophy while other lakes and wetland in north of Iran were progressed in mesotrophic level. In this paper the biotic and abiotic parameters have been compared with some water bodies in north of Iran.

Anzali wetland on the south west of Caspian Sea is a unique ecosystem was registered as Ramsar site at 1975. Anzali wetland was deteriorated due to numerous disorder and poor water quality. The riverin input were strongly affective in the process of eutrophication where the eastern and central region was more degraded. The first survey on the eutrophication process was conducted at 1969, since then several other investigations reported too. This survey was conducted on several study sites at period from 1991 to 2000. For evaluating eutrophication degree the trophic model of chlorophyll-a, total phosphorous and nitrogen also total phosphate to total nitrogen index were used. The result showed that the mean Chlorophyll-a concentration is above of 25 µg/l. and the nitrogen and phosphorous concentration were between 0.15-1.5 mg/l and 0.17-0.05 mg/l. respectively. On the based of trophic level of chlorophyll-a, total phosphorous and total nitrogen 87-100 % of wetland is eutroph however at early years about 46-90 % of the surface area were eutroph indicating that the trend of eutrophication increasing. Trophic models of phosphate to nitrogen shows the most part of Anzali wetland is in the extreme mesotrophic level close to entropic zone. The average entropic index value was 46 with respect to other characteristic of wetland appear to be low. According to TSI (PN) less than 5.2% surface area of Anzali wetland is entropic state status. Anzali wetland does not have enough capacity to reduce all anthropogenic loads from its watershed area therefore the first effective activity is to prevent nutrient load input of wetland. The restoration of Anzali wetland is suggested base on previous investigation recommendations and with revising some of them.

The surface layer of sediments in the east of the Anzali Lagoon was surveyed for heavy metal contamination during the year 2004 at the National Inland Water Aquaculture Institute. Samples were obtained by sediment sampler (Eckman Grab) from Pirbazar River, Pasikhan and Selkeh. The samples were dried and treated by wet digestion (HNO3, H2SO4, HCLO4) under open reflux condition. Concentration of Pb, Fe, Cu and Cd were 7.92, 0.2775%, 25.8 and 1.645 mg/g dry weight respectively. The Fe and Cu have the highest concentration. We found that in the study area, Pirbazar was the most contaminated with the selected heavy metals.

Heavy metal tlocculation process was studied in the year 2002 in order to determine the interaction of water in Pirbazar River with Caspian Sea water. The effects of various salinity concentrations of Caspian Sea water were studied on determined heavy metals including Fe, Zn, Pb, Cu, Cd and Cr level of Pirbazar River using APHA method of extraction and measurement. The results illustrated that the level of heavy metal concentration in Pirbazar Riverwere above standard limits and the extent of flocculation depended on both the salinity level and the heavy metal itself. The maximum flocculation for Cd and Cr were recorded at 7.65 ppt, for Zn and Fe at 9.35ppt while for Pb and Cd were at 2.55ppt salinity. The order of tlocculation with respect to percentage of original concentrations was found to be Zn > Fe > Cr> Cu > Cd> Pb.

We determined concentration of surfactants as mg/I of LAS using Sublation-Methylen Blue method in the south Caspian Sea coastal areas extending from Astara to Bandar-e-Tourkaman. The method was based on the American Standard Method for Examination of Water and Wastewater. We analyzed 53 water samples and found an average surfactant concentration of 0.019mgi1 with the minimum and maximum being 0.008mg/I and 0.038mgi1 respectively. We conclude that presently, surfactant concentration is not critical in the coastal areas. However, care must be exercised interpreting these results considering the synergistic effects between the surfactants and heavy metals and oil hydrocarbons......