Iranian Journal of Fisheries Sciences, Jul 10, 2020
This is the first study with the greatest number of multimetric indices calculated in Iran to ass... more This is the first study with the greatest number of multimetric indices calculated in Iran to assess water quality at Jajrood and Karaj protected rivers. Given the point that these rivers supply a large portion of Tehran's drinking water, the present study aims at determining ecological quality of these rivers based on a suitable biotic index among these indices. Physicochemical and macro-invertebrate samples were collected with three replications during three consecutive years from 19 stations with a Surber sampler. In the Jajrood River, macroinvertebrates with 6667 abundance belong to 22 families and in the Karaj River, macro-invertebrates with 13,246 abundance belong to 24 families have been identified. The most appropriate time for sampling is in summer because of the existence maximum abundance and diversity of macroinvertebrates. The results of CCA have been shown physicochemical parameters TSS, EC, pH, and BOD have the most effect on the distribution of macroinvertebrates. Among the 16 biotic indices, the FBI index in Karaj River and the BMWP/ASPT index in the Jajrood River are the most reliable indices for assessing the water quality. The results showed that point pollution sources (orchards, restaurants and villages) and nonpoint sources (tourism activities and recreational area) have the most negative impact on the ecosystem of these two rivers. Results of water quality assessment have been shown the changes in ecological quality of water due to human activities; therefore, it is necessary to increase control and management of pollutant sources to improve the water quality of these two rivers.
This study evaluated Length-Weight Relationships (LWRs) and condition factor (K) of the juvenile ... more This study evaluated Length-Weight Relationships (LWRs) and condition factor (K) of the juvenile and young adult fish from shallow littoral zones in some aquatic ecosystems located in Khuzestan province, Iran. In June 2015, the specimens were sampled using a seine net from the Shadegan Wetland, the Dez, and the Karkheh Rivers in the time period of increased juvenile recruitment. The LWRs of fish were calculated using linear regression log formula as log W=loga+blogTL, and the K estimated using K=W/L3. A total of 18 species belong to 5 families collected in the stations. Exotic species comprised 33.33% of the total ichthyofauna. The variation of b-value ranges between 2.65 and 3.26, and the growth pattern is isometric in all species except Acanthobrama marmid. Since the amount of K was higher than one in all species, it can be concluded that the sampling stations are favorable for the growth of the fish. As a consequence of the decreased floodplain habitats in the surrounding of the water bodies, the shallow waters of littoral zones that have suitable features for the juvenile fish can play an essential role in the survival of the native fish fauna.
Background: Aras River is the main source of drinking water supply in northwestern provinces of I... more Background: Aras River is the main source of drinking water supply in northwestern provinces of Iran. The present study aimed to determine the concentration of heavy metals in the river on the border between Iran and Armenia. Methods: Three samples were taken from the Aras river water, the river bottom sediments and the root of Phragmites australis. In water sampling, the concentration of Hg, Mo, Cu, C o, B, Cd, Ni, Zn, Pb, Al, Mn, Cr, and Fe was noticed while in sediment sampling, to measure the concentration of Cu and Mo. In samples taken from the plant root, the concentration of Cu was only analyzed. The water sampling was performed at 11 stations along the river course during four seasons fall, winter, spring and summer 2011. Results: The highest and lowest concentrations respectively belonged to Al (2600 ppb) and Cd (0.4 ppb). Parameters including B, Cu, Mo and Al were all higher than the standard limits. The results obtained from sediment and root sampling indicated that the concentration of Cu exceeds the standard. Conclusion: Poor quality of Aras River reveals to the necessity of implementing mitigation measures to improve the water quality of the river.
Background: Unsustainable development of agriculture and aquaculture has reduced the water qualit... more Background: Unsustainable development of agriculture and aquaculture has reduced the water quality of rivers. The most important aim of this study is assessing of water quality in the Ghezel Özan basin in Zanjan province. Method: 18 sites were selected based on standard criteria including land use, geology, biodiversity points, accessibility and standard distributions. Content of Dissolved Oxygen, Temperature, Turbidity and Electrical Conductivity were measured in-situ while number of Fecal Coliform, amount of BOD, COD, Phosphate, Nitrate, Nitrite, Ammonia, Sulfate and Chlorine were measured at laboratory. Results: One-sample T.test showed a significant difference between the Coliform and its standard. Results have illustrated the remarkable impacts of agricultural and aquaculture activities on the river health. Also, among all quality parameters, Nitrate and Fecal Coliform show a significant difference in two regions, Tarom and Mahneshan. There is the best water quality in site 7 (...
International Journal of Environmental Science and Technology, 2021
Each year, millions of tons of bisphenol-A (BPA) are produced and used in the global economy. In ... more Each year, millions of tons of bisphenol-A (BPA) are produced and used in the global economy. In children, BPA exposure causes impaired brain development, attention deficit hyperactivity disorder (ADHD), as well as anxiety and metabolic-related disorders. Pregnant women, infants and young children face the greatest risk from BPA exposure. Under public pressure, BPA has been banned from baby bottles, but BPA is still being heavily used in the industry and numerous consumer products. Using high-performance liquid chromatography coupled with a UV detector (HPLC–UV), we measured BPA (mg L−1) in fifteen local brands of plastic bottled water (n = 24) which are sold in markets of Zanjan, Iran. BPA levels ranged between “non-detectable” to 0.98 mg L−1. Spearman correlation test did not detect significant relationships between BPA and bottle color, its volume, or water pH. BPA increased, though negligibly, with increasing storage time and sunlight exposure. The estimated daily intake (EDI) was 0.075 × 10–3 μg kg-bw−1 day−1. Levels of BPA in bottled waters of the City of Zanjan were negligible. Protection of humans, wildlife and planet earth requires nothing less than a total ban on BPA.
This study evaluated Length-Weight Relationships (LWRs) and condition factor (K) of the juvenile ... more This study evaluated Length-Weight Relationships (LWRs) and condition factor (K) of the juvenile and young adult fish from shallow littoral zones in some aquatic ecosystems located in Khuzestan province, Iran. In June 2015, the specimens were sampled using a seine net from the Shadegan Wetland, the Dez, and the Karkheh Rivers in the time period of increased juvenile recruitment. The LWRs of fish were calculated using linear regression log formula as log W=loga+blogTL, and the K estimated using K=W/L3. A total of 18 species belong to 5 families collected in the stations. Exotic species comprised 33.33% of the total ichthyofauna. The variation of b-value ranges between 2.65 and 3.26, and the growth pattern is isometric in all species except Acanthobrama marmid. Since the amount of K was higher than one in all species, it can be concluded that the sampling stations are favorable for the growth of the fish. As a consequence of the decreased floodplain habitats in the surrounding of the...
This is the first study with the greatest number of multimetric indices calculated in Iran to ass... more This is the first study with the greatest number of multimetric indices calculated in Iran to assess water quality at Jajrood and Karaj protected rivers. Given the point that these rivers supply a large portion of Tehran's drinking water, the present study aims at determining ecological quality of these rivers based on a suitable biotic index among these indices. Physicochemical and macro-invertebrate samples were collected with three replications during three consecutive years from 19 stations with a Surber sampler. In the Jajrood River, macroinvertebrates with 6667 abundance belong to 22 families and in the Karaj River, macro-invertebrates with 13,246 abundance belong to 24 families have been identified. The most appropriate time for sampling is in summer because of the existence maximum abundance and diversity of macroinvertebrates. The results of CCA have been shown physicochemical parameters TSS, EC, pH, and BOD have the most effect on the distribution of macroinvertebrate...
Background: Soils have a key role in establishment and growth of biota and also are as a natural ... more Background: Soils have a key role in establishment and growth of biota and also are as a natural resource, national capital and life substrate in any country. Therefore, every contamination can be transferred from soils to higher food levels with its negative impacts. Therefore, the purpose of the present study is to investigate oil pollution in soils caused by the establishment of Shahid Tondgovian Oil Storage in Zanjan province. The depot has three storage tanks with capacity of 47, 35 and 26 million liters of oil and gasoline and kerosene, respectively. Methods: Soil samples were collected from a depth of 5-15 cm at 20 sites and the values of EC, pH and PAHs were measured. Then T-test was used to compare the results with standards and control sites. Results: The mean of pH and EC results were 8.24 and 281 µ/cm, respectively. The results showed PAHs values were lower than the standard and there was no statistically significant difference between the study sites and the control one (P > 0.05). Also, the amount of benzo (a) pyrene compound, used as an indicator of total PAHs to study carcinogenic effects, was lower than standard in study area. Therefore, there is no health risk for the oil residents in collected samples from Shahid Tondgoian Oil Storage. Conclusion: Currently, oil pollution is not observed in the soils around the study area and there is no health risk for the residents in the suburbs.
Journal of Human, Environment, and Health Promotion, 2017
Journal homepage: www.zums.ac.ir/jhehp Background: Iran is located in the global arid zone. With ... more Journal homepage: www.zums.ac.ir/jhehp Background: Iran is located in the global arid zone. With an average rainfall of less than 250 mm. 25 percent is Iran of located in hyper-dry area and 40 percent in the arid area. In 2007, the World Bank report declared the annual reduction of freshwater resources in Iran 6 times more than global standards and indicators. Since at present, in Iran most available fresh water enters the water ecosystems, their management is vitally important due to climate changes and water quality parameters. Methods: In this study, long-term changes of some parameters including hardness, dissolved solids and EC, pH, HCO3, Ca, Na, Mg, Cl and SO4 were investigated for a period of 44 years in two key rivers (Neka and Tajan rivers) in the north of Iran. Results: The results show that there was the same changes pattern in all parameters in both rivers. The highest level of correlation was between electrical conductivity and dissolved solids in both rivers. Also, due to the similarity of the hydrological characteristics of the rivers, the impact of area development by local people is playing a major role in the environmental health. Conclusion: Although Iran's northern regions have high rate of precipitation, status of water quality parameters is an indicator of low levels of water quality and its pollution.
Background: Aras River is the main source of drinking water supply in northwestern provinces of I... more Background: Aras River is the main source of drinking water supply in northwestern provinces of Iran. The present study aimed to determine the concentration of heavy metals in the river on the border between Iran and Armenia. Methods: Three samples were taken from the Aras river water, the river bottom sediments and the root of Phragmites australis. In water sampling, the concentration of Hg, Mo, Cu, C o, B, Cd, Ni, Zn, Pb, Al, Mn, Cr, and Fe was noticed while in sediment sampling, to measure the concentration of Cu and Mo. In samples taken from the plant root, the concentration of Cu was only analyzed. The water sampling was performed at 11 stations along the river course during four seasons fall, winter, spring and summer 2011. Results: The highest and lowest concentrations respectively belonged to Al (2600 ppb) and Cd (0.4 ppb). Parameters including B, Cu, Mo and Al were all higher than the standard limits. The results obtained from sediment and root sampling indicated that the concentration of Cu exceeds the standard. Conclusion: Poor quality of Aras River reveals to the necessity of implementing mitigation measures to improve the water quality of the river.
Background: Unsustainable development of agriculture and aquaculture has reduced the water qualit... more Background: Unsustainable development of agriculture and aquaculture has reduced the water quality of rivers. The most important aim of this study is assessing of water quality in the Ghezel Özan basin in Zanjan province. Method: 18 sites were selected based on standard criteria including land use, geology, biodiversity points, accessibility and standard distributions. Content of Dissolved Oxygen, Temperature, Turbidity and Electrical Conductivity were measured in-situ while number of Fecal Coliform, amount of BOD, COD, Phosphate, Nitrate, Nitrite, Ammonia, Sulfate and Chlorine were measured at laboratory. Results: One-sample T.test showed a significant difference between the Coliform and its standard. Results have illustrated the remarkable impacts of agricultural and aquaculture activities on the river health. Also, among all quality parameters, Nitrate and Fecal Coliform show a significant difference in two regions, Tarom and Mahneshan. There is the best water quality in site 7 (upstream site) located far from human access. IRWQI index (Iranian water quality index for surface water) shows the best results because of more overlap with land-uses and the trend of variables. Conclusion: Olive cultivation and unsustainable aquaculture development in Tarom and Mahneshan, respectively, are main reasons for decreasing of water quality. So, integrated water resources management, training local people, assessing environmental impacts and determining the ecological potential are highly recommended to improve the water quality of the studied river.
Macroinvertebrates are without spinal cord living organisms that spend their main phases of metam... more Macroinvertebrates are without spinal cord living organisms that spend their main phases of metamorphosis in water; so, changing the ecological structure of their communities represents environmental health condition. The main purpose of this study was to identify the macroinvertebrate families as a biological indicator and, consequently, determining the water ecological quality in the Ghezel Ozan River, NW Iran. The sampling was conducted at 18 stations in autumn 2017. At the same time, dissolved oxygen, temperature, turbidity, electrical conductivity, fecal and total coliform, BOD 5, COD, phosphate, nitrate, nitrite, ammonia, chloride, and sulfate were measured based on APHA in each station. Then, based on the collected data, the NSFWQI, IRWQIsc, EQR, and BMWP/ASPT indices were calculated. In total, 1778 individual belong to 12 orders and 22 families were identified, which the most abundant order was Ephemeroptera by 47.8%. Except for the pH, COD, DO, and nitrogen compounds, other studied parameters were exceeded from their acceptable level. It seems that the geological characteristics are very effective in changing the parameters especially salinity. The best water quality was at Kharmaneh-Sar station (7), which runs from the protected area at high altitudes without human pressure. Also, the trend of water quality decreases from the upstream to downstream, which is completely in line with human activities. Therefore, the results of this study can well illustrate the role of land use and geology changes on the macroinvertebrate communities, which can be used to evaluate the ecological integrity of the river. Regular monitoring of river water quality and controlling and managing the quantity and quality of fish farms along the river can help in the ecological health of the river.
The level of mercury, iron, copper, and zinc was measured in 18 Great cormorants (Phalacrocorax c... more The level of mercury, iron, copper, and zinc was measured in 18 Great cormorants (Phalacrocorax carbo) collected from Anzali and Gomishan wetlands in the south of the Caspian Sea. The mean level of metals in dried tissues of the muscle, liver, and kidney was 2.
International Journal of Environmental Science and Technology, 2018
Modifications in the ecological structure of macroinvertebrate communities could reflect changes ... more Modifications in the ecological structure of macroinvertebrate communities could reflect changes in environmental conditions. Therefore, the aim of the present study is to identify macroinvertebrate assemblage and evaluating the efficiency of single-criterion and multicriteria indices for determining the ecological health of water quality of the Bakhtegan watershed located in the Eghlid city of Iran. A Surber sampler was used to sample eight sites along the river route. Physicochemical parameters were measured in each site including BOD, COD, nitrate, nitrite, phosphate, ammonia and fecal coliform in the laboratory and temperature, pH, EC, DO and hardness at the site of sampling. A total of 8161 macroinvertebrates were identified in 14 orders and 24 families recognized in the studied region and its highest frequency belonged to Gammaridae family (66%). Spearman correlation coefficient (r = 0.81) indicated that the BMWP/ASPT bioindex has a higher performance than other indicators for Bakhtegan area. The results of this study have shown no significant difference between control and non-control sites (Sig. 0.05). It was found that Gammaridae was the dominant major taxon in all sampling sites. Since the river's water is used for farming and also drinking, it is necessary for local managers to be more sensitive to the conditions of the region and try to increase public awareness and other researches to improve the ecological health quality.
Journal of Environmental Health Science and Engineering, 2015
BackgroundNowadays, aquatic organisms are used as bio-indicators to assess ecological water quali... more BackgroundNowadays, aquatic organisms are used as bio-indicators to assess ecological water quality in western regions, but have hardly been used in an Iranian context. We, therefore, evaluated the suitability of several indices to assess the water quality for an Iranian case study.MethodsMeasured data on biotic (fish and macroinvertebrates) and abiotic elements (28 physicochemical and habitat parameters), were used to calculate six indices for assessment of water quality and the impact of human activities in the Tajan river, Iran. GIS, uni- and multivariate statistics were used to assess the correlations between biological and environmental endpoints.ResultsThe results showed that ecological condition and water quality were reduced from up- to downstream. The reduced water quality was revealed by the biotic indices better than the abiotic ones which were linked to a variety of ecological water quality scales.ConclusionThe fish index showed a strong relationship with long-term datab...
In the name of God ی لم ع رزوهم Scientific Curriculum Vitae اترخی 10 / 16 / 0131 اػظوی... more In the name of God ی لم ع رزوهم Scientific Curriculum Vitae اترخی 10 / 16 / 0131 اػظوی جابز Jaber Aazami
The objectives of this study were to assess the biological water of the Iranian Tajan River using... more The objectives of this study were to assess the biological water of the Iranian Tajan River using different metrics, i.e., a Multimetric Macroinvertebrate Index (MMI) and a traits-based method. Twenty-eight physico-chemical parameters, 10 habitat factors, and abundance of macroinvertebrates were obtained for 17 sites. The Shahid-Rajaie dam divides the Tajan River into an up- and downstream part, with different land uses. Eighteen metrics were used to represent four components of ecosystem quality, including tolerance (Hilsenhoff, SIGNAL), diversity (Margalef, Shannon-Wiener, Simpson, and Evenness), abundance (total number of taxa, individuals, Ephemeroptera, Plecoptera, Trichoptera, EPT, and Insects), and composition of assemblages (% Ephemeroptera, % Plecoptera, % Trichoptera, and % EPT Taxa). The integrated MMI was calculated by averaging the obtained scores of all indices. In the next step, we gathered information on 22 biological traits of macroinvertebrates to evaluate whether ...
Bulletin of Environmental Contamination and Toxicology, 2011
Concentration of mercury in tissues of the great cormorant (n = 18), mallard (n = 18), and coot (... more Concentration of mercury in tissues of the great cormorant (n = 18), mallard (n = 18), and coot (n = 15) of the Caspian Sea were determined. Liver mercury in the great cormorant, mallard, and coot were (5.7 ± 0.91; 0.3 ± 0.02; 0.09 ± 0.02). Kidney levels were (3.6 ± 2.24; 0.26 ± 0.03; 0.08 ± 0.02); feather (8.7 ± 0.8; 1.04 ± 0.16; 0.23 ± 0.15) and muscle were (2.26 ± 2.04; 0.11 ± 0.01; 0.03 ± 0.02) respectively. Mercury Tolerable Daily Intake limit is set at 5 lg g-1. But even at levels that are currently considered ''tolerable'', mercury poisoning can occur in children and young who consume polluted game meat regularly.
Bulletin of Environmental Contamination and Toxicology, 2012
We measured and compared total and organic mercury in liver, kidney, and muscle of the Great Corm... more We measured and compared total and organic mercury in liver, kidney, and muscle of the Great Cormorant (Phalacrocorax carbo), mallard (Anas platyrhynchos), and coot (Fulica atra) from the Caspian Sea wetlands in Iran. For the Great Cormorant organic mercury in liver, kidney and muscle comprised 82 %, 79 % and 58 % of total mercury. In the mallard same values were 46 %, 54 %, and 64 %. For coot total mercury was: 0.1 ± 0.0, 0.1 ± 0.01, 0.03 ± 0.01 in liver kidney and muscle respectively. We detected no organic mercury. In general older birds that feed on higher trophic levels can accumulate more mercury in their tissues.
Iranian Journal of Fisheries Sciences, Jul 10, 2020
This is the first study with the greatest number of multimetric indices calculated in Iran to ass... more This is the first study with the greatest number of multimetric indices calculated in Iran to assess water quality at Jajrood and Karaj protected rivers. Given the point that these rivers supply a large portion of Tehran's drinking water, the present study aims at determining ecological quality of these rivers based on a suitable biotic index among these indices. Physicochemical and macro-invertebrate samples were collected with three replications during three consecutive years from 19 stations with a Surber sampler. In the Jajrood River, macroinvertebrates with 6667 abundance belong to 22 families and in the Karaj River, macro-invertebrates with 13,246 abundance belong to 24 families have been identified. The most appropriate time for sampling is in summer because of the existence maximum abundance and diversity of macroinvertebrates. The results of CCA have been shown physicochemical parameters TSS, EC, pH, and BOD have the most effect on the distribution of macroinvertebrates. Among the 16 biotic indices, the FBI index in Karaj River and the BMWP/ASPT index in the Jajrood River are the most reliable indices for assessing the water quality. The results showed that point pollution sources (orchards, restaurants and villages) and nonpoint sources (tourism activities and recreational area) have the most negative impact on the ecosystem of these two rivers. Results of water quality assessment have been shown the changes in ecological quality of water due to human activities; therefore, it is necessary to increase control and management of pollutant sources to improve the water quality of these two rivers.
This study evaluated Length-Weight Relationships (LWRs) and condition factor (K) of the juvenile ... more This study evaluated Length-Weight Relationships (LWRs) and condition factor (K) of the juvenile and young adult fish from shallow littoral zones in some aquatic ecosystems located in Khuzestan province, Iran. In June 2015, the specimens were sampled using a seine net from the Shadegan Wetland, the Dez, and the Karkheh Rivers in the time period of increased juvenile recruitment. The LWRs of fish were calculated using linear regression log formula as log W=loga+blogTL, and the K estimated using K=W/L3. A total of 18 species belong to 5 families collected in the stations. Exotic species comprised 33.33% of the total ichthyofauna. The variation of b-value ranges between 2.65 and 3.26, and the growth pattern is isometric in all species except Acanthobrama marmid. Since the amount of K was higher than one in all species, it can be concluded that the sampling stations are favorable for the growth of the fish. As a consequence of the decreased floodplain habitats in the surrounding of the water bodies, the shallow waters of littoral zones that have suitable features for the juvenile fish can play an essential role in the survival of the native fish fauna.
Background: Aras River is the main source of drinking water supply in northwestern provinces of I... more Background: Aras River is the main source of drinking water supply in northwestern provinces of Iran. The present study aimed to determine the concentration of heavy metals in the river on the border between Iran and Armenia. Methods: Three samples were taken from the Aras river water, the river bottom sediments and the root of Phragmites australis. In water sampling, the concentration of Hg, Mo, Cu, C o, B, Cd, Ni, Zn, Pb, Al, Mn, Cr, and Fe was noticed while in sediment sampling, to measure the concentration of Cu and Mo. In samples taken from the plant root, the concentration of Cu was only analyzed. The water sampling was performed at 11 stations along the river course during four seasons fall, winter, spring and summer 2011. Results: The highest and lowest concentrations respectively belonged to Al (2600 ppb) and Cd (0.4 ppb). Parameters including B, Cu, Mo and Al were all higher than the standard limits. The results obtained from sediment and root sampling indicated that the concentration of Cu exceeds the standard. Conclusion: Poor quality of Aras River reveals to the necessity of implementing mitigation measures to improve the water quality of the river.
Background: Unsustainable development of agriculture and aquaculture has reduced the water qualit... more Background: Unsustainable development of agriculture and aquaculture has reduced the water quality of rivers. The most important aim of this study is assessing of water quality in the Ghezel Özan basin in Zanjan province. Method: 18 sites were selected based on standard criteria including land use, geology, biodiversity points, accessibility and standard distributions. Content of Dissolved Oxygen, Temperature, Turbidity and Electrical Conductivity were measured in-situ while number of Fecal Coliform, amount of BOD, COD, Phosphate, Nitrate, Nitrite, Ammonia, Sulfate and Chlorine were measured at laboratory. Results: One-sample T.test showed a significant difference between the Coliform and its standard. Results have illustrated the remarkable impacts of agricultural and aquaculture activities on the river health. Also, among all quality parameters, Nitrate and Fecal Coliform show a significant difference in two regions, Tarom and Mahneshan. There is the best water quality in site 7 (...
International Journal of Environmental Science and Technology, 2021
Each year, millions of tons of bisphenol-A (BPA) are produced and used in the global economy. In ... more Each year, millions of tons of bisphenol-A (BPA) are produced and used in the global economy. In children, BPA exposure causes impaired brain development, attention deficit hyperactivity disorder (ADHD), as well as anxiety and metabolic-related disorders. Pregnant women, infants and young children face the greatest risk from BPA exposure. Under public pressure, BPA has been banned from baby bottles, but BPA is still being heavily used in the industry and numerous consumer products. Using high-performance liquid chromatography coupled with a UV detector (HPLC–UV), we measured BPA (mg L−1) in fifteen local brands of plastic bottled water (n = 24) which are sold in markets of Zanjan, Iran. BPA levels ranged between “non-detectable” to 0.98 mg L−1. Spearman correlation test did not detect significant relationships between BPA and bottle color, its volume, or water pH. BPA increased, though negligibly, with increasing storage time and sunlight exposure. The estimated daily intake (EDI) was 0.075 × 10–3 μg kg-bw−1 day−1. Levels of BPA in bottled waters of the City of Zanjan were negligible. Protection of humans, wildlife and planet earth requires nothing less than a total ban on BPA.
This study evaluated Length-Weight Relationships (LWRs) and condition factor (K) of the juvenile ... more This study evaluated Length-Weight Relationships (LWRs) and condition factor (K) of the juvenile and young adult fish from shallow littoral zones in some aquatic ecosystems located in Khuzestan province, Iran. In June 2015, the specimens were sampled using a seine net from the Shadegan Wetland, the Dez, and the Karkheh Rivers in the time period of increased juvenile recruitment. The LWRs of fish were calculated using linear regression log formula as log W=loga+blogTL, and the K estimated using K=W/L3. A total of 18 species belong to 5 families collected in the stations. Exotic species comprised 33.33% of the total ichthyofauna. The variation of b-value ranges between 2.65 and 3.26, and the growth pattern is isometric in all species except Acanthobrama marmid. Since the amount of K was higher than one in all species, it can be concluded that the sampling stations are favorable for the growth of the fish. As a consequence of the decreased floodplain habitats in the surrounding of the...
This is the first study with the greatest number of multimetric indices calculated in Iran to ass... more This is the first study with the greatest number of multimetric indices calculated in Iran to assess water quality at Jajrood and Karaj protected rivers. Given the point that these rivers supply a large portion of Tehran's drinking water, the present study aims at determining ecological quality of these rivers based on a suitable biotic index among these indices. Physicochemical and macro-invertebrate samples were collected with three replications during three consecutive years from 19 stations with a Surber sampler. In the Jajrood River, macroinvertebrates with 6667 abundance belong to 22 families and in the Karaj River, macro-invertebrates with 13,246 abundance belong to 24 families have been identified. The most appropriate time for sampling is in summer because of the existence maximum abundance and diversity of macroinvertebrates. The results of CCA have been shown physicochemical parameters TSS, EC, pH, and BOD have the most effect on the distribution of macroinvertebrate...
Background: Soils have a key role in establishment and growth of biota and also are as a natural ... more Background: Soils have a key role in establishment and growth of biota and also are as a natural resource, national capital and life substrate in any country. Therefore, every contamination can be transferred from soils to higher food levels with its negative impacts. Therefore, the purpose of the present study is to investigate oil pollution in soils caused by the establishment of Shahid Tondgovian Oil Storage in Zanjan province. The depot has three storage tanks with capacity of 47, 35 and 26 million liters of oil and gasoline and kerosene, respectively. Methods: Soil samples were collected from a depth of 5-15 cm at 20 sites and the values of EC, pH and PAHs were measured. Then T-test was used to compare the results with standards and control sites. Results: The mean of pH and EC results were 8.24 and 281 µ/cm, respectively. The results showed PAHs values were lower than the standard and there was no statistically significant difference between the study sites and the control one (P > 0.05). Also, the amount of benzo (a) pyrene compound, used as an indicator of total PAHs to study carcinogenic effects, was lower than standard in study area. Therefore, there is no health risk for the oil residents in collected samples from Shahid Tondgoian Oil Storage. Conclusion: Currently, oil pollution is not observed in the soils around the study area and there is no health risk for the residents in the suburbs.
Journal of Human, Environment, and Health Promotion, 2017
Journal homepage: www.zums.ac.ir/jhehp Background: Iran is located in the global arid zone. With ... more Journal homepage: www.zums.ac.ir/jhehp Background: Iran is located in the global arid zone. With an average rainfall of less than 250 mm. 25 percent is Iran of located in hyper-dry area and 40 percent in the arid area. In 2007, the World Bank report declared the annual reduction of freshwater resources in Iran 6 times more than global standards and indicators. Since at present, in Iran most available fresh water enters the water ecosystems, their management is vitally important due to climate changes and water quality parameters. Methods: In this study, long-term changes of some parameters including hardness, dissolved solids and EC, pH, HCO3, Ca, Na, Mg, Cl and SO4 were investigated for a period of 44 years in two key rivers (Neka and Tajan rivers) in the north of Iran. Results: The results show that there was the same changes pattern in all parameters in both rivers. The highest level of correlation was between electrical conductivity and dissolved solids in both rivers. Also, due to the similarity of the hydrological characteristics of the rivers, the impact of area development by local people is playing a major role in the environmental health. Conclusion: Although Iran's northern regions have high rate of precipitation, status of water quality parameters is an indicator of low levels of water quality and its pollution.
Background: Aras River is the main source of drinking water supply in northwestern provinces of I... more Background: Aras River is the main source of drinking water supply in northwestern provinces of Iran. The present study aimed to determine the concentration of heavy metals in the river on the border between Iran and Armenia. Methods: Three samples were taken from the Aras river water, the river bottom sediments and the root of Phragmites australis. In water sampling, the concentration of Hg, Mo, Cu, C o, B, Cd, Ni, Zn, Pb, Al, Mn, Cr, and Fe was noticed while in sediment sampling, to measure the concentration of Cu and Mo. In samples taken from the plant root, the concentration of Cu was only analyzed. The water sampling was performed at 11 stations along the river course during four seasons fall, winter, spring and summer 2011. Results: The highest and lowest concentrations respectively belonged to Al (2600 ppb) and Cd (0.4 ppb). Parameters including B, Cu, Mo and Al were all higher than the standard limits. The results obtained from sediment and root sampling indicated that the concentration of Cu exceeds the standard. Conclusion: Poor quality of Aras River reveals to the necessity of implementing mitigation measures to improve the water quality of the river.
Background: Unsustainable development of agriculture and aquaculture has reduced the water qualit... more Background: Unsustainable development of agriculture and aquaculture has reduced the water quality of rivers. The most important aim of this study is assessing of water quality in the Ghezel Özan basin in Zanjan province. Method: 18 sites were selected based on standard criteria including land use, geology, biodiversity points, accessibility and standard distributions. Content of Dissolved Oxygen, Temperature, Turbidity and Electrical Conductivity were measured in-situ while number of Fecal Coliform, amount of BOD, COD, Phosphate, Nitrate, Nitrite, Ammonia, Sulfate and Chlorine were measured at laboratory. Results: One-sample T.test showed a significant difference between the Coliform and its standard. Results have illustrated the remarkable impacts of agricultural and aquaculture activities on the river health. Also, among all quality parameters, Nitrate and Fecal Coliform show a significant difference in two regions, Tarom and Mahneshan. There is the best water quality in site 7 (upstream site) located far from human access. IRWQI index (Iranian water quality index for surface water) shows the best results because of more overlap with land-uses and the trend of variables. Conclusion: Olive cultivation and unsustainable aquaculture development in Tarom and Mahneshan, respectively, are main reasons for decreasing of water quality. So, integrated water resources management, training local people, assessing environmental impacts and determining the ecological potential are highly recommended to improve the water quality of the studied river.
Macroinvertebrates are without spinal cord living organisms that spend their main phases of metam... more Macroinvertebrates are without spinal cord living organisms that spend their main phases of metamorphosis in water; so, changing the ecological structure of their communities represents environmental health condition. The main purpose of this study was to identify the macroinvertebrate families as a biological indicator and, consequently, determining the water ecological quality in the Ghezel Ozan River, NW Iran. The sampling was conducted at 18 stations in autumn 2017. At the same time, dissolved oxygen, temperature, turbidity, electrical conductivity, fecal and total coliform, BOD 5, COD, phosphate, nitrate, nitrite, ammonia, chloride, and sulfate were measured based on APHA in each station. Then, based on the collected data, the NSFWQI, IRWQIsc, EQR, and BMWP/ASPT indices were calculated. In total, 1778 individual belong to 12 orders and 22 families were identified, which the most abundant order was Ephemeroptera by 47.8%. Except for the pH, COD, DO, and nitrogen compounds, other studied parameters were exceeded from their acceptable level. It seems that the geological characteristics are very effective in changing the parameters especially salinity. The best water quality was at Kharmaneh-Sar station (7), which runs from the protected area at high altitudes without human pressure. Also, the trend of water quality decreases from the upstream to downstream, which is completely in line with human activities. Therefore, the results of this study can well illustrate the role of land use and geology changes on the macroinvertebrate communities, which can be used to evaluate the ecological integrity of the river. Regular monitoring of river water quality and controlling and managing the quantity and quality of fish farms along the river can help in the ecological health of the river.
The level of mercury, iron, copper, and zinc was measured in 18 Great cormorants (Phalacrocorax c... more The level of mercury, iron, copper, and zinc was measured in 18 Great cormorants (Phalacrocorax carbo) collected from Anzali and Gomishan wetlands in the south of the Caspian Sea. The mean level of metals in dried tissues of the muscle, liver, and kidney was 2.
International Journal of Environmental Science and Technology, 2018
Modifications in the ecological structure of macroinvertebrate communities could reflect changes ... more Modifications in the ecological structure of macroinvertebrate communities could reflect changes in environmental conditions. Therefore, the aim of the present study is to identify macroinvertebrate assemblage and evaluating the efficiency of single-criterion and multicriteria indices for determining the ecological health of water quality of the Bakhtegan watershed located in the Eghlid city of Iran. A Surber sampler was used to sample eight sites along the river route. Physicochemical parameters were measured in each site including BOD, COD, nitrate, nitrite, phosphate, ammonia and fecal coliform in the laboratory and temperature, pH, EC, DO and hardness at the site of sampling. A total of 8161 macroinvertebrates were identified in 14 orders and 24 families recognized in the studied region and its highest frequency belonged to Gammaridae family (66%). Spearman correlation coefficient (r = 0.81) indicated that the BMWP/ASPT bioindex has a higher performance than other indicators for Bakhtegan area. The results of this study have shown no significant difference between control and non-control sites (Sig. 0.05). It was found that Gammaridae was the dominant major taxon in all sampling sites. Since the river's water is used for farming and also drinking, it is necessary for local managers to be more sensitive to the conditions of the region and try to increase public awareness and other researches to improve the ecological health quality.
Journal of Environmental Health Science and Engineering, 2015
BackgroundNowadays, aquatic organisms are used as bio-indicators to assess ecological water quali... more BackgroundNowadays, aquatic organisms are used as bio-indicators to assess ecological water quality in western regions, but have hardly been used in an Iranian context. We, therefore, evaluated the suitability of several indices to assess the water quality for an Iranian case study.MethodsMeasured data on biotic (fish and macroinvertebrates) and abiotic elements (28 physicochemical and habitat parameters), were used to calculate six indices for assessment of water quality and the impact of human activities in the Tajan river, Iran. GIS, uni- and multivariate statistics were used to assess the correlations between biological and environmental endpoints.ResultsThe results showed that ecological condition and water quality were reduced from up- to downstream. The reduced water quality was revealed by the biotic indices better than the abiotic ones which were linked to a variety of ecological water quality scales.ConclusionThe fish index showed a strong relationship with long-term datab...
In the name of God ی لم ع رزوهم Scientific Curriculum Vitae اترخی 10 / 16 / 0131 اػظوی... more In the name of God ی لم ع رزوهم Scientific Curriculum Vitae اترخی 10 / 16 / 0131 اػظوی جابز Jaber Aazami
The objectives of this study were to assess the biological water of the Iranian Tajan River using... more The objectives of this study were to assess the biological water of the Iranian Tajan River using different metrics, i.e., a Multimetric Macroinvertebrate Index (MMI) and a traits-based method. Twenty-eight physico-chemical parameters, 10 habitat factors, and abundance of macroinvertebrates were obtained for 17 sites. The Shahid-Rajaie dam divides the Tajan River into an up- and downstream part, with different land uses. Eighteen metrics were used to represent four components of ecosystem quality, including tolerance (Hilsenhoff, SIGNAL), diversity (Margalef, Shannon-Wiener, Simpson, and Evenness), abundance (total number of taxa, individuals, Ephemeroptera, Plecoptera, Trichoptera, EPT, and Insects), and composition of assemblages (% Ephemeroptera, % Plecoptera, % Trichoptera, and % EPT Taxa). The integrated MMI was calculated by averaging the obtained scores of all indices. In the next step, we gathered information on 22 biological traits of macroinvertebrates to evaluate whether ...
Bulletin of Environmental Contamination and Toxicology, 2011
Concentration of mercury in tissues of the great cormorant (n = 18), mallard (n = 18), and coot (... more Concentration of mercury in tissues of the great cormorant (n = 18), mallard (n = 18), and coot (n = 15) of the Caspian Sea were determined. Liver mercury in the great cormorant, mallard, and coot were (5.7 ± 0.91; 0.3 ± 0.02; 0.09 ± 0.02). Kidney levels were (3.6 ± 2.24; 0.26 ± 0.03; 0.08 ± 0.02); feather (8.7 ± 0.8; 1.04 ± 0.16; 0.23 ± 0.15) and muscle were (2.26 ± 2.04; 0.11 ± 0.01; 0.03 ± 0.02) respectively. Mercury Tolerable Daily Intake limit is set at 5 lg g-1. But even at levels that are currently considered ''tolerable'', mercury poisoning can occur in children and young who consume polluted game meat regularly.
Bulletin of Environmental Contamination and Toxicology, 2012
We measured and compared total and organic mercury in liver, kidney, and muscle of the Great Corm... more We measured and compared total and organic mercury in liver, kidney, and muscle of the Great Cormorant (Phalacrocorax carbo), mallard (Anas platyrhynchos), and coot (Fulica atra) from the Caspian Sea wetlands in Iran. For the Great Cormorant organic mercury in liver, kidney and muscle comprised 82 %, 79 % and 58 % of total mercury. In the mallard same values were 46 %, 54 %, and 64 %. For coot total mercury was: 0.1 ± 0.0, 0.1 ± 0.01, 0.03 ± 0.01 in liver kidney and muscle respectively. We detected no organic mercury. In general older birds that feed on higher trophic levels can accumulate more mercury in their tissues.
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