Yazar "Oterler, Burak" seçeneğine göre listele
Listeleniyor 1 - 10 / 10
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Analysis of Benthic Macroinvertebrates in Relation to Environmental Variables of Lake Gala, a National Park of Turkey(Central Fisheries Research Inst, 2010) Camur-Elipek, Belgin; Arslan, Naime; Kirgiz, Timur; Oterler, Burak; Guher, Huseyin; Ozkan, NurcanIn order to determine the relationships between the dynamics of benthic macroinvertebrates (both species number and individual number) and environmental variables, sampling was made at four different stations at monthly intervals during a year between March 2004 and January 2005 of Lake Gala which is a part of an important wetland and a national park in European part of Turkey (Enez/Edirne). Altogether, a total of 49 zoobenthic taxa which were grouped as Oligochaeta, Chironomidae, and Varia, comprised of 1,628 individuals in per m(2) at average were recognised in the sampling stations of the Lake. The present study showed that larval chironomids comprising 57% abundance of the total specimens are the biggest part of benthic macroinvertebrates. It is followed by oligochaetes and the group varia comprising 34% and 9% abundance, respectively. Also, it was seen changing that the composition of zoobenthic group dominancy in the Lake as time passes. Furthermore, according to Shannon-Wcaner index, species diversity for zoobenthic macroinvertebrate fauna of the lake was found as H'=1.21 at average. Also, similarities of the sampling stations and months, both the dynamics of benthic macroinvertebrates and physicochemical features were evaluated by using Bray-Curtis similarity index. According to Spearman correlation index, relationship between the number of individuals and some physicochemical variables such as temperature, turbidity (light permeability), and depth of the lake was determined statistically significant.Öğe Benthic macrofauna in Tunca River (Turkey) and their relationships with environmental variables(Wiley-V C H Verlag Gmbh, 2006) Camur-Elipek, Belgin; Arslan, Naime; Kirgiz, Timur; Oterler, BurakThe numerical and proportional distributions of benthic macroinvertebrates in Tunca (Tundja, Tundzha) River (Edirne/Turkey) were determined from July 2002 to June 2003 at monthly intervals at four different stations. It was found that the benthic macrofauna consisted of 63% Oligochaeta, 24% Chironomidae larvae, and 13% Varia by numbers. According to the Shannon-Wiener index, Tunca River had a diversity of 1.36; station 2 and September were found to have the highest diversity while station 4 and December to have the poorest. According to Bray-Curtis similarity index, stations 2 and 3 and April and May were found to be the most similar to each other while stations 1 and 4 and August and January were found to be the most different from each other for the dynamics of the benthic macrofauna. Also some physicochemical parameters of the water (water temperature, electrical conductivity, pH, dissolved oxygen, chloride, total hardness, NO3--N, NO2--N, sulfate, phosphate, biochemical and chemical oxygen demands) were analyzed. Pearson correlation index supported the relationships between the dynamics of organisms and physicochemical variables. The relation between the number of macroinvertebrates and pH (r = +0.57, P < 0.05) was direct proportional while the relation between the number of macroinvertebrates and NO3--N (r = -0.99, P < 0.05) was inverse proportional. Furthermore, the Chironomidae larvae of Bryophaenocladius muscicola and Mesosmittia flexuella were new records for Turkish Thrace region. High pH and supersaturated oxygen levels, hard water quality, second quality levels of NO3--N, BOD, COD and fourth quality levels of NO2--N as well as the density of 490 individuals m(-2) for 124 taxa and the diversity of 1.36 showed that similar studies should be repeated periodically in Tunca to determine the future of the river.Öğe Community Structure, Temporal and Spatial Changes of Epiphytic Algae on Three Different Submerged Macrophytes in a Shallow Lake(Hard, 2017) Oterler, BurakThe aim of this study was to determine the composition, biodiversity, and relative abundance of epiphytic algal species on three submerged aquatic plant species (the macrophytes Ceratophyllum demersum, Myriophyllum spicatum, and Potamogeton crispus) in Lake Gala in Lake Gala National Park, Turkey, and the associations of the observed relationships with environmental variables. The aquatic plants were collected at monthly intervals between March 2014 and November 2014, and epiphytic algae on the plants were identified. In total, 98, 74, and 66 taxa of epiphytic algae were identified on C. demersum, M. spicatum, and P. crispus, respectively. The species composition of the epiphytic algae on the three macrophyte species showed a statistically significant difference (F = 7.07, p<0.05). There was also a statistically significant difference in epiphytic algae species diversity, depending on the sampled month (F = 3.59, p<0.05). The mean species richness and species diversity on C. demersum was 33 and 1.546, respectively. On M. spicatum, the mean species richness and species diversity was 23 and 1.407, respectively. On P. crispus, the mean species richness was 19, and the species diversity was 1.256. The following species were the dominant epiphytic taxa in Gala Lake: Cocconeis placentula, Anabaena constricta, Gomphonema acuminatum, Oscillatoria limosa, Cymbella cistula, and Epithemia sorex. Although the species composition of the epiphytic algae was different, the diversity values were similar on all the macrophyte species.Öğe DETERMINING OF WATER QUALITY BY USING MULTIVARIATE ANALYSIS TECHNIQUES IN A DRINKING/USING WATER RESERVOIR IN TURKEY(Parlar Scientific Publications (P S P), 2017) Elipek, Belgin Camur; Guher, Huseyin; Oterler, Burak; Divrik, Menekse Tas; Mimiroglu, Pinar Altinolukl This study has been carried out to assess the water quality of a drinking/using water reservoir in Turkey by using the different multivariate statistical techniques (Bray-Curtis cluster analysis (BCCA), principle component analysis (PCA), and correspondence analysis (CA) methods). The annual dataset belonging physical and chemical features in the reservoir was obtained by the monthly intervals between the years 2010 and 2011. A total of 15 parameters (temperature, dissolved oxygen (DO), biological oxygen demand (BOD5), light permeability, conductivity, salinity, chloride, pH, total hardness, Ca, Mg, NO2-N, NO3-N, o-PO4, SO4) have been monitored at three different sampling stations in the reservoir and a total of 495 observations were grouped statistically. The sampled periods have been classified into three different groups by using the BCCA. The results were supported by the PCA and CA statistical methods. Consequently, in order to determine and to evaluate for large complex datasets that belong to environmental properties, multivariate analyses are very useful techniques. Thus, the sampling periods to monitor the physicochemical including in a water resource can be determined.Öğe The diversity, abundance and seasonal distribution of planktonic microcrustacean (Copepoda, Cladocera) in Kayalikoy Reservoir (Kirklareli/Turkey)(Ege Univ, Fac Fisheries, 2021) Guher, Huseyin; Oterler, BurakThis study was carried out to determine the diversity, abundance and seasonal distribution of planktonic microcrustaceans (Cladocera, Copepoda) in Kayalikoy Reservoir. Cladocera and Copepoda samples were collected from May 2018 to April 2019 at three stations in the reservoir and some environmental parameters were measured. The qualitative evaluation of the samples revealed presence of 40 species, 24 from Cladocera and 16 from Copepoda, in the reservoir. The quantitative evaluation of the samples showed that 52690 ind./m(3) zooplankton on average was found in the reservoir. The most common species in the reservoir were Daphnia cucullata, D. longispina, D. pulex, Bosmina longirostris and Chydorus sphaericus from Cladocera, and Arctodiaptomus wierzejskii, Acanthocyclops robustus and Thermocyclops crassus from Copepoda. According to the water quality standards, the measured values of water temperature, dissolved oxygen, sulfate, salinity and chloride indicated the first quality of water, while the light permeability, nitrite-nitrogen, nitrate-nitrogen, ortho-phosphate and chlorophyll-a values indicated the second and third quality of water levels. According to these results, we conclude that Kayalikoy Reservoir has a mesotrophic character in terms of the microcrustacean fauna and the physicochemical parameters.Öğe Influence of Environmental Conditions on the Phytoplankton Community Assemblages in Suloglu Reservoir (Edirne, Turkey)(Central Fisheries Research Inst, 2018) Oterler, Burak; Elipek, Belgin Camur; Arat, Salih MuratFreshwater resources are some of the most important basic needs necessary for usage by people, especially for drinking water. Reservoirs that are built to store freshwater resources and access water on demand, may be prone to get more environmental effects than natural resources. Phytoplankton, which is the first level of in primary production, is specifically affected by environmental changes in different ways. This study investigated the algal flora of Suloglu Reservoir (Edirne, Turkey) which is utilized as a freshwater reserve, as well as environmental variables influential on its community structure. For this reason a sampling campaign was performed in three stations selected in the reservoir in 3 different depths between January 2013 and November 2013. The study found 111 phytoplanktonic algae taxa belong to the divisions of Chlorophyta, Bacillariphyta, Cyanobacteria, Euglenophyta, Charophyta Miozoa and Ochrophyta. Chlorophyta members were generally dominant, and some environmental factors (i.e. light, pH values, temperature) were significantly effective on the distribution of all algal communities. The Shannon diversity values changed in the range of 1.02-2.75. CCA analysis results showed that there was a noticeable relationship between water quality parameters (chlorophyll-a, pH and water temperature) and time-based changes in dominant phytoplankton species. Moreover, recommendations were provided for sustainable usage of the reservoir whose trophic level was determined.Öğe New Records for The Turkish Freshwater Algal Flora in Twenty-five River Basins of Turkey, Part II: Chlorophyta, Cyanobacteria, Euglenozoa(Central Fisheries Research Inst, 2022) Maraslioglu, Faruk; Oterler, Burak; Sevindik, Tugba Ongun; Soylu, Elif Neyran; Demir, Nilsun; Celekli, Abuzer; Somek, HasimTurkish lakes which have different morphometry and hydrology, have a great potential that supports distinct algal diversity as a result of different climate types and geographical variation (latitudinal, longitudinal, and altitudinal gradients). However, the algal flora of Turkey has not been completed, and the number of new taxa has increased due to new studies in Turkey. This study aims to describe new planktonic algal taxa for the Turkish freshwater algal flora. A total of 330 Chlorophyta, 164 Cyanobacteria and 187 Euglenozoa taxa were determined in a study conducted from 2017 to 2019 in 275 lakes of 25 river basins of Turkey. During this study, 116 Chlorophyta, 41 Cyanobacteria, and 81 Euglenozoa were found new records for the freshwater algal flora of Turkey.Öğe Qualitative and quantitative evaluation of water resources that feed into the National Park Igneada Longoz Forests (Turkish Thrace) by using physico-chemical and biological analyses(Univ Autonoma Metropolitana-Iztapalapa, 2015) Camur-Elipek, Belgin; Kirgiz, Timur; Oterler, Burak; Tas, MenekseIn this study, some physico-chemical and biological features of the water resources that feed three alluvial longose groves (are also known as Longoz) which are important wetlands in the National Park Igneada Longoz Forests including a lot of different ecosystems were investigated. In order to assess the water quality, a total of eight running water resources were sampled within four different seasons and two lakes were sampled at dry and wet seasons in 2008-2009. While some water resources were found to have high quality levels for some physico-chemical findings, the results were also supported by using EPT (Ephemeroptera Plecoptera Trichoptera) index. Furthermore, the cluster analysis, correspondence analysis, and Pearson correlation index were used to determine the relationships between the data. As a result, although a lot of sampled water resources that feed into the National Park area has been found to have good quality level, it was also observed that the area have been under the negative effects of humans. Therefore, at the end of this study, it was also made some suggestions for sustainable usage of this special area.Öğe Spatial and temporal evaluation of the physicochemical quality of domestic/industrial water in the Kirklareli Reservoir (Turkish Thrace)(Serbian Chemical Soc, 2022) Guher, Huseyin; Oterler, Burak; Elipek, Belgin Camur; Yeler, Okan; Aydin, Gazel BurcuThe Kirklareli Reservoir, located in the Meric-Ergene River Basin, is an important drinking/industrial freshwater resource of the Kirklareli 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-alpha, 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-alpha, pH, NO2-N, chloride, selenium) were mapped in GIS using the spline integration approach. In addition, the 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 using multivariance analyses (Bray-Curtis similarity index, correspondence analyses, Pearson correlation index). As a result, it was emphasized that the use of the GIS approach is a potential useful method for monitoring the sustainable water quality of the Kirklareli Reservoir, which was determined to have an oligomesotrophic character.Öğe Winter Phytoplankton Composition Occurring in a Temporarily Ice-Covered Lake: a Case Study(Hard, 2017) Oterler, BurakIt is generally thought that the seasonal succession of phytoplankton is minimized during winter months. However, some studies have indicated that there is also diversity in phytoplankton communities in winter. The main purpose of this study was to determine the phytoplankton community structure and species composition of a lake during winter, when covered with ice. Phytoplankton samples from the lake were taken in the winter seasons of 2015 and 2016, during the period from the appearance of the ice cover on the lake until it completely melted, and phytoplankton composition in the lake and some physicochemical properties of the lake water were measured. The phytoplankton community was found to be dominated by Cyclotella meneghiniana, which is a centric diatom, followed by the flagellates, especially Synura uvella, small cryptophytes (Cryptomonas paramecium), dinoflagellates (Peridinium aciculiferum and Gymnodinium sp.), and nonfilamentous greens (Pediastrum duplex, Scenedesmus spp., and Monoraphidium spp.). Phytoplankton development under ice-cover is largely related to temperature, but the development of phytoplankton composition is random. A low correlation was determined between the dominant organisms and ice thickness. Species biodiversity was low, but the dominant species started to be represented with different taxonomic groups after mid-winter.
