Papers by Gazel Burcu Aydın
Aquatic sciences and engineering, Oct 19, 2022
In this study, the long-term suitability of the area proposals for winter recreation activities i... more In this study, the long-term suitability of the area proposals for winter recreation activities in the Seyhan Basin (Türkiye), which is located in the Mediterranean and Central Anatolia regions and includes a large part of the Taurus Mountains, were examined ecologically. For this purpose, the predicted global warming scenarios in the basin and the anthropogenic impacts arising from the planned recreation areas were evaluated for the upper basin (recreation areas) and lower basin (water resources, agricultural lands, and settlements) using a hypothetical risk analysis. For this purpose, multispectral images were obtained by using Landsat 8 Oli Multispectral images of the snow areas in the region in January-February-March 2019, and a hypothetical ecological risk analysis was created considering a total of 5 pressure factors originating from global climate change and anthropogenic effects. These possible factors were determined as flood (S1), drought (S2), sedimentation (S3), aquatic nutrients (S4), and tourist density (S5). The effects of these factors on a total of four features (C1: water quality, C2: fauna-flora, C3: agricultural areas, and C4: settlements) in the region were evaluated by hypothetical grading based on the literature. According to the hypothesis results obtained by the formula and statistical calculations, it was determined that the flood factor (S1) that will occur due to possible snow melt due to global climate change in the winter recreation areas in the studied region is the most significant factor limiting the sustainable usage of the Basin. For this reason, it has been emphasized in this study that the possibility of regions being exposed to the effects of climate change in the future should be taken into account, especially when planning for winter recreation areas. At the end of this study, it was concluded that the ecological balance analysis of basins is important, especially in terms of ensuring the long-term sustainable use of winter recreation areas.
Journal of The Serbian Chemical Society, 2021
Kırklareli Reservoir locating in Meriç-Ergene River Basin is an important drinking/using a freshw... more Kırklareli Reservoir locating in Meriç-Ergene River Basin is an important drinking/using a freshwater resource of Kırklareli Province. In order to ensure the sustainable use of this important reservoir, its current situation should be examined periodically and evaluated by multivariate analyses. For this reason, the water samples were taken between the dates April 2018 and February 2019 at monthly intervals from 3 different stations. The data of environmental and physicochemical variables (water temperature, dissolved oxygen, pH, salinity, conductivity, total dissolved solids, Chlorophyll-a, light permeability, fluoride, chloride, NO2-N, NO3-N, PO4, SO4, and essential/potentially toxic elements) measured and evaluated according to the classes in surface water quality control regulation of Turkey. The parameters exceeding first-class water quality values (chlorophyll-a, pH, NO2-N, chloride, selenium) were mapped in GIS using Spline integration approach. Also, Sodium Absorbtion Ratio, Kelly Index Values, and Magnesium Ratio, were calculated to evaluate the water quality for agricultural irrigation water standards. The water quality of the reservoir was evaluated by using multivariance analyses (Bray-Curtis Similarity Index, Correspondence Analyses, Pearson Correlation Index). As a result, it was emphasized that using GIS approach is a potential useful method of monitoring the sustainable water quality of Kırklareli reservoir which is determined to have an oligomesotrophic character.
Oceanological and Hydrobiological Studies, Jun 30, 2022
Evaluation of ecological risk analysis for benthic macroinvertebrates in paddy fields in the Meri... more Evaluation of ecological risk analysis for benthic macroinvertebrates in paddy fields in the Meriç-Ergene River Basin (Turkish Thrace)
In the present study, adult male specimens from the non-biting midge family (Chironomidae) collec... more In the present study, adult male specimens from the non-biting midge family (Chironomidae) collected around the Hazar Lake (Elazığ, Türkiye) in 2021 were evaluated taxonomically. We collected a total of 17 species in three subfamilies of Tanypodinae, Orthocladiinae, and Chironominae. Two species Cryptotendipes pseudotener (Goetghebuer, 1922), and Dicrotendipes pallidicornis (Goetghebuer, 1934) are new faunistic records for Türkiye. 11 species were observed for the first time in the Hazar Lake, although they have been reported previously in Türkiye. These include:
Oceanological and Hydrobiological Studies
Benthic macroinvertebrates are very important components of aquatic environments, and monitoring ... more Benthic macroinvertebrates are very important components of aquatic environments, and monitoring their population dynamics helps us understand the effects of environmental factors on ecosystems. This study aimed to determine the dynamics of benthic macroinvertebrate fauna in paddy fields in the Meriç–Ergene River Basin (Turkish Thrace region) by investigating some physicochemical environmental parameters that may affect its distribution. For this purpose, water and sediment samples were collected from paddy fields in the study area during the cultivation season, including spring, summer and autumn of 2016, taking into account the water resources that supply the rice fields (artesian water, the Meriç River, the Ergene River and Meriç–Ergene mixed water). A total of 47 taxa (on average 8953 individuals per m2 ) were identified at the study sites. Water samples were analyzed to determine water temperature, pH, conductivity, salinity, total dissolved solids, calcium, magnesium, total ha...
Acta Aquatica Turcica
In this study, to determine the trophic level of Küçükçekmece Lagoon Lake, water and sediment sam... more In this study, to determine the trophic level of Küçükçekmece Lagoon Lake, water and sediment samplings were performed at five selected stations seasonally during a year between 2014-2015. The water samples were analyzed to determine some environmental variables (water temperature, pH, conductivity, DO (dissolved oxygen), TDS (total dissolved solids), and salinity. NO3-N, NO2-N, SO4-2, PO4-3, SiO2, chlorophyll-a, TP (total phosphorus), and Secchi disc light permeability) and benthic macroinvertebrates were examined to determine indicator organisms in the sampled sediment material. Bray-Curtis Similarity Index was used to the observed environmental results to determine the similarities of the sampling stations. According to this, station 1 (St. 1) located in the center of the lake, and St. 5 located near the sea were found to be different from other sampling stations while the stations located near the creeks were found to have much more similar to each other. In addition, to determi...
Journal of Limnology and Freshwater Fisheries Research, 2020
The roles of larval chironomids in the food chain of both the lotic and the lentic ecosystems are... more The roles of larval chironomids in the food chain of both the lotic and the lentic ecosystems are very important. On the one hand, chironomid larvae feeding on algae, diatoms, rotting organic matter, plant, and animal residues also play an important role in these systems as a source of food for other carnivores and omnivorous organisms. In this study, the gut contents of Cryptochironomus defectus (Kieffer, 1913), Cladotanytarsus mancus (Walker, 1856), Polypedilum scalaenum (Schrank, 1803), Tanypus kraatzi (Kieffer, 1912) collected from the freshwater ecosystems located in the northern parts of the Thrace region of Turkey were analyzed to compare their feeding habits. As a result of the analysis, it was determined that while plant fragments were dominant in C. defectus species in the gut content (44.3%), algae were dominant for C. mancus (44.7%), P. scalaenum (63.5%), T. kraatzi (65%). According to the results of the Shannon-Wiener (H') index species, diversity of the P. scalaenu...
Gazi Entomolojik Arastirmalar Dernegi, 2021
The present study was carried out in Diyarbakır Province (N 37°53'36.96", E 40°16'13.65", 666 m) ... more The present study was carried out in Diyarbakır Province (N 37°53'36.96", E 40°16'13.65", 666 m) in Southeastern Anatolia Region of Turkey in 2018-2020. Prunus cerasifera tree parts infested by the buprestid beetle, Ptosima undecimmaculata, were cut in June 2018 and February 2019 (Figs. 1-2) and Prunus persica infested by buprestids larvae, Ptosima undecimmaculata (Herbst, 1784) and Sphenoptera (Tropeopeltis) tappesi Marseul, 1865, respecitvely were cut and placed in plastic boxes until host and/ or their potential parasitoids were reared. Three ichneumonid parasitoids, Dolichomitus kriechbaumeri (Schulz, 1906), Poemenia notata Holmgren, 1859 and Xorides gravenhorstii (Curtis, 1831), were obtained. New host records were found: P. undecimmaculata for D. kriechbaumeri and S. tappesi for X. gravenhorstii. All three parasitoid species were reared from the studied plants for the first time. P. notata is a new record for Turkish fauna.
Proceedings of the 3rd World Congress on Civil, Structural, and Environmental Engineering, Apr 1, 2018
Rice is the staple food for 40% of the world's population and is grown in over 100 countries toda... more Rice is the staple food for 40% of the world's population and is grown in over 100 countries today. Rice cultivation is not only important for providing food resource for humans but also for including rich biodiversity. The rice ecosystems host many plants and animals. These ecosystems are exposed different farming practices like using pesticides, fertilizers, agrochemicals and irrigation water quality. The different applications cause heavy metals contamination in rice fields and threat risk to rice crops and biodiversity. The objective of this study was to investigate the heavy metals (Cd, Cu, Ni, Mn) in rice fields from sediment and water, in Turkey. The Meriç-Ergene River Basin (MERB) which is located on Turkish Thrace at northwestern of Turkey was chosen as study area due to hosting important paddy fields providing rice needs of Turkish people. MERB has consisted of 43.4 % of the total area under rice. Water and sediment samples were taken from 4 localities which based on the 4 different water regimes; irrigation from artesian locality A), Meriç River (locality M), Ergene River (locality E), mixed water by Meriç-Ergene Rivers (locality ME). In the area, rice is cultivated and harvesting during an annual cropping season: March-October. The sampling was done in May (spring sampling) and September (autumn sampling) 2016. The sediment samples were cleaned to remove residuals of stones, roots and the other impurities and dried at room temperature. 1 g dried sediment samples were dispersed in 3ml distilled water and extracted by acid mixture (5 ml HNO3:2 ml HCL). Then, the solution was filtered with filter paper. The filtered samples were placed into the polyethylene bottles and kept in 4 ºC until heavy metal analyses were done. Before heavy metal analyses, 1 ml HClO4 was added. Concentrations of Cd, Cu, Ni, Mn in the extractants were determined by atomic absorption spectrophotometry. For the water analyses, the acid mixture (5 ml HNO3:2 ml HCL) and 8 ml distilled water were added in 10 ml water samples. Then, the solution was filtered with filter paper. Before heavy metal analyses, 1 ml HClO4 was added. Concentrations of Cd, Cu, Ni, Mn in the extractants were determined by atomic absorption spectrophotometry. The results were evaluated by statistically using Bray-Curtis similarity index. As a result, Mn and Cu were found higher than Ni and Cd at the spring sampling for sediment, but for water Mn was the least. At the autumn sampling for sediment Mn was found the highest, but for water Mn and Ni were found lower level than Cu and Cd. At the all localities, sediment included Mn in the highest level. According to the Bray-Curtis index results, localities E (Ergene River which is located in industrial areas) and A (artesian water from underground) were found to have the most similar each other according to their heavy metal contents. This similarity can be explained by the underground waters in the area may contaminated from surface water resources which located in the industrial or agricultural areas.
Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2018
Larval chironomids feed on algae, diatomae, detritus, decaying plant and animal fragments. The la... more Larval chironomids feed on algae, diatomae, detritus, decaying plant and animal fragments. The larvae in turn are food for other carnivore and omnivore animals. Thus, larval chironomids have a very important role in the aquatic food cycle. In this study, the algal flora in the stomachs of Tanypus punctipennis, which is known as a very common species in Turkish Thrace, was examined in terms of qualitative and quantitative factors. It was found that Bacillariophyta was the dominant group with 42 taxa in the stomach of T. punctipennis. It was followed by Cyanophyta with 3 taxa, Euglenophyta with 6 taxa, Chlorophyta with 4 taxa, Carophyta with 2 taxa, and Rhodophyta with 1 taxa.
Acta Aquatica Turcica, 2020
This checklist deals with summarizing all the data on Iranian Chironomidae (Diptera). In total, 3... more This checklist deals with summarizing all the data on Iranian Chironomidae (Diptera). In total, 34 species from 5 subfamilies are listed as the fauna of Iran: Buchonomyiinae (single species), Chironominae (18 species from 24 genera with some unknown species), Diamesinae (unknown species within 4 genera), Orthocladiinae (8 species from 24 genera with some unknown species) and Tanypodinae (7 species from 10 genera with some unknown species). Three species, Chironomus anthracinus Zetterstedt, 1860, Cladotanytarsus (Cladotanytarsus) mancus (Walker, 1856) and Tanypus punctipennis Meigen, 1818 are new records for the fauna of Iran.
Trakya University Journal of Natural Sciences, 2018
Recent taxonomic studies suggest that findings of larval chironomids should be supported also by ... more Recent taxonomic studies suggest that findings of larval chironomids should be supported also by adult findings in order to obtain more robust and reliable results on the studied group. Moreover identifications of larvae of some species can be made to genus level only due to similarities of some larval characteristics in different species. In such cases, species level identifications can be achieved by the growth of larvae in laboratory conditions. Also, larval culturing under optimum growth conditions will not only make it easy to provide materials for experimental studies and but also achievement of larvae with a higher biomass value to be used as food in the sector. In this study, Tanypus punctipennis Meigen (Diptera, Chironomidae), a very common species in Turkish Thrace, was used as the model organism for culture studies. Individual larvae were cultured from third instar stage to adult form under laboratory conditions. A simple and cheap method is offered for experimental studi...
TURKISH JOURNAL OF ZOOLOGY, 2017
Larval and adult material collected from July 2012 to July 2013 and previously collected larval m... more Larval and adult material collected from July 2012 to July 2013 and previously collected larval material were evaluated taxonomically to determine the Chironomidae (Diptera) fauna of Kırklareli Province. Accordingly, a total of 64 species belonging to the subfamilies Tanypodinae, Prodiamesinae, Orthocladinae, and Chironominae of the family Chironomidae were determined, of which
Journal of the Serbian Chemical Society, 2021
The K?rklareli Reservoir, located in the Meri?-Ergene River Basin, is an important drinking/indus... more The K?rklareli Reservoir, located in the Meri?-Ergene River Basin, is an important drinking/industrial freshwater resource of the K?rklareli Province. In order to ensure the sustainable use of this important reservoir, its current situation should be examined periodically and evaluated by multivariate analyses. For this reason, water samples were taken between the dates April 2018 and February 2019 at monthly intervals from 3 different stations. The data on the environmental and physicochemical variables (water temperature, dissolved oxygen, pH, salinity, conductivity, total dissolved solids, chlorophyll-a, light permeability, fluoride, chloride, NO2-N, NO3-N, PO4, SO4 and essential/potentially toxic elements) were measured and evaluated according to the classes of surface water quality control regulation of Turkey. The parameters exceeding first-class water quality values (chlorophyll-a, pH, NO2-N, chloride, selenium) were mapped in GIS using the spline integration approach. In add...
Tigris and Euphrates Rivers: Their Environment from Headwaters to Mouth, 2021
Tigris–Euphrates River Basin is one of the great river systems of south-western Asia. Tigris (Dic... more Tigris–Euphrates River Basin is one of the great river systems of south-western Asia. Tigris (Dicle) River and Euphrates (Firat) River are born in Turkey and they follow roughly parallel courses from their sources to the upper part of the Persian Gulf. The Lake Hazar located in the southeast of Elazig Province is the main source of the Tigris River while the Murat and Karasu streams originated in northeastern Turkey are major tributaries of the Euphrates. A total of ten dam lakes or reservoirs are located on Tigris and Euphrates Rivers in Turkey. A lot of them are used to provide hydroelectric power besides recreational and fisheries purposes. In this chapter, benthic macroinvertebrate communities in this area reported at previous studies were submitted.
In the present study, adult specimens belonging aquatic/semi-aquatic coleopteran collected from 1... more In the present study, adult specimens belonging aquatic/semi-aquatic coleopteran collected from 1986 to 2002 in Turkish Thrace were evaluated taxonomically. Altogether, a total of 23 species belonging to the families Dytiscidae, Haliplidae, Noteridae, Gyrinidae, Helophoridae and Hydrophilidae were determined. A total of 12 species Hydaticus (Hydaticus)
Larval and adult material collected from July 2012 to July 2013 and previously collected larval m... more Larval and adult material collected from July 2012 to July 2013 and previously collected larval material were evaluated taxonomically to determine the Chironomidae (Diptera) fauna of Kırklareli Province. Accordingly, a total of 64 species belonging to the subfamilies Tanypodinae, Prodiamesinae, Orthocladinae, and Chironominae of the family Chironomidae were determined, of which
The roles of larval chironomids in the food chain of both the lotic and the lentic ecosystems are... more The roles of larval chironomids in the food chain of both the lotic and the lentic ecosystems are very important. On the one hand, chironomid larvae feeding on algae, diatoms, rotting organic matter, plant, and animal residues also play an important role in these systems as a source of food for other carnivores and omnivorous organisms. In this study, the gut contents of Cryptochironomus defectus (Kieffer, 1913), Cladotanytarsus mancus (Walker, 1856), Polypedilum scalaenum (Schrank, 1803), Tanypus kraatzi (Kieffer, 1912) collected from the freshwater ecosystems located in the northern parts of the Thrace region of Turkey were analyzed to compare their feeding habits. As a result of the analysis, it was determined that while plant fragments were dominant in C. defectus species in the gut content (44.3%), algae were dominant for C. mancus (44.7%), P. scalaenum (63.5%), T. kraatzi (65%). According to the results of the Shannon-Wiener (H') index species, diversity of the P. scalaenum was found to be the highest among the larvae (H'= 1.345). Also, according to the Bray-Curtis similarity index, the most similar types of gut contents were P. scalaenum and C. defectus (38%). This low rate indicated that the species have different food preferences.
Recent taxonomic studies suggest that findings of larval chironomids should be supported also by ... more Recent taxonomic studies suggest that findings of larval chironomids should be supported also by adult findings in order to obtain more robust and reliable results on the studied group. Moreover identifications of larvae of some species can be made to genus level only due to similarities of some larval characteristics in different species. In such cases, species level identifications can be achieved by the growth of larvae in laboratory conditions. Also, larval culturing under optimum growth conditions will not only make it easy to provide materials for experimental studies and but also achievement of larvae with a higher biomass value to be used as food in the sector. In this study, Tanypus punctipennis Meigen (Diptera, Chironomidae), a very common species in Turkish Thrace, was used as the model organism for culture studies. Individual larvae were cultured from third instar stage to adult form under laboratory conditions. A simple and cheap method is offered for experimental studies on larval growths of chironomids and the effects of water temperature and pH, both with very important roles in larval culturing, were determined. The overall results of laboratory tests showed that the temperature value of 25°C and 7-8 pH interval were the optimal laboratory conditions for culture of T. punctipennis larvae.
Larval chironomids feed on algae, diatomae, detritus, decaying plant and animal fragments. The la... more Larval chironomids feed on algae, diatomae, detritus, decaying plant and animal fragments. The larvae in turn are food for other carnivore and omnivore animals. Thus, larval chironomids have a very important role in the aquatic food cycle. In this study, the algal flora in the stomachs of Tanypus punctipennis, which is known as a very common species in Turkish Thrace, was examined in terms of qualitative and quantitative factors. It was found that Bacillariophyta was the dominant group with 42 taxa in the stomach of T. punctipennis. It was followed by Cyanophyta with 3 taxa, Euglenophyta with 6 taxa, Chlorophyta with 4 taxa, Carophyta with 2 taxa, and Rhodophyta with 1 taxa.
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Papers by Gazel Burcu Aydın