2014 Cilt 8 Sayı 24

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    Phytoplankton community, functional classification and trophic state indices of Yedikır dam lake (Amasya)
    (Uludağ Üniversitesi, 2014-12-23) Maraşlıoğlu, Faruk; Gönülol, Arif
    Functional classification, Trophic Status and composition of phytoplankton in Yedikır Dam Lake were studied between October 2004 and April 2006. Although Chlorophyta and Bacillariophyta were dominant in respect to species numbers, Cyanophyta and Chlorophyta type phytoplankton were registered in terms of population density in Yedikır Dam Lake. According to an average chlorophyll a concentration of 16 μg L-1 , Dam Lake belongs to the eutrophic level of the trophic scale. A total of 126 phytoplankton species were identified in the study period, belonging to 18 functional groups. The seasonal succession of dominant functional groups followed this sequence of coda: B (Cyclotella), F (Kirchneriella), J (Crucigenia), H1 (Anabaena, Aphanizomenon), LO (Merismopedia), and W2 (Trachelomonas). Trophic state indices derived from chlorophyll a and transparency, were close together, but both were above the phosphorous index. Values of trophic state indices rank the Yedikır Dam Lake as being eutrophic. According to the some functional groups and indices the phytoplankton biomass in Dam Lake is probably limited by low phosphorus, low light and low nutrients.
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    Kovada channel phytoplankton (Isparta- Turkey)
    (Uludağ Üniversitesi, 2014-12-23) Yüce, Arzu Morkoyunlu; Ertan, Ömer Osman
    In this study, phytoplanktonic compositions and some water parameters were investigated from selected stations representing Kovada Channel. Twenty three taxa belonging to Bacillariophyta, 15 taxa belonging to Chlorophyta, 3 taxa belonging to Cyanophyta; 2 taxa belonging to Euglenophyta, a total of 43 taxa were identified. Average water temperature as 14.5 °C, pH 7.9, dissolved oxygen as 6.3 mgL-1 , electrical conductivity as 370.7 µmhos/cm, organic matter as 18.8 mgL-1 , total hardness as 22.4 mgL-1 , carbonate 11.6 mgL-1 , bicarbonate 234.5 mgL-1 , sulfate 9.8 mgL-1 , nitrate 2.0 mgL-1 and phosphate as 0.3 mgL-1 were measured.
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    Modelling of minimum water levels of Lake İznik by using time series models
    (Uludağ Üniversitesi, 2014-12-23) Özen, Arda; Ediş, Semih; Göl, Ceyhun
    Minimum lake-level has important impacts on lake ecology (such as submerged plant growth, in-lake nutrients concentrations, physicochemical properties of lakes, lake biodiversity and lake primary production). However, prediction of lake water levels is important in watershed management for planning, design, construction, and operation of lakeshore structures and also in the management of freshwater lakes for water supply purposes. In the present paper, autoregressive moving average (ARMA) techniques were applied to test the power of predictability of models for minimum lake-level variations in Lake İznik. The measurements at the Lake Iznik in Bursa, for the period of 1955-2002 were used for training, testing, and validating the employed models (AR,MA and ARMA). The results obtained by the ARMA (2,2) model indicated that it performs better than other models in predicting minimum lake-levels. Our results also showed the possibility of predicting minimum lake water levels by using its own minimum lake levels data without the need of using any other data.
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    Aquatic macrophytes and soil features on Karamik lake coastal ecosystem in Afyonkarahisar (Turkey)
    (Uludağ Üniversitesi, 2014-12-23) Serteser, Ahmet; Acar, Hasan
    Karamik Lake and marshlands is located in inner-west Anatolia and Afyonkarahisar boundaries, being in B3 square according to the grid system. Most of the study area is covered by Quaternary lands. Bioclimate of the area is a combination of little rainy - cold Mediterranean climates. The precipitation regime shows the characteristic of eastern Mediterranean. Most of the study area has alluvial soils, hydromorphic alluvial and colluvial soils with dunes and marshes of land type. Floristic region of the area is a IranoTuranian type and about 50 vascular plant types have been identified. 6 plant communities are identified regarding to BraunBlanquet(1932) in the research area. These are Lycopus europaeus, Tetragonolobus maritimus, Scirpoides holoschoenus, Schoenoplectus litoralis, Sparganium erectum subsp. microcarpum, Carex distans. To accomplish the research the communities of plant have been pulled up with their soil and the analysed and evaluated. To find the relationship with this plantcommunities 0-30 and 30-60 cm soil samples retrieved from the depths and their physical-chemical analyses and commented.
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    First attempt at conservation of a critically endangered cyprinodontid in Turkey
    (Uludağ Üniversitesi, 2014-12-23) Yoğurtçuoğlu, Baran; Ekmekçi, Fitnat Güler
    This study has been conducted for conservation of an endemic killifish, Aphanius transgrediens (CR), in Lake Acıgöl since spring 2013. The only distribution area of Aphanius transgrediens is the ground water dependent wetland which consists of about 20 small freshwater springs. Habitat degradation and invasive mosquitofish (Gambusia holbrooki) are the most threatening factors in the area. The main purpose of initial attempts was based on the assessment of the general situation of the fish populations and habitat. The number and location of spring outlets occupied by G. holbrooki and A. transgrediens were determined by fish samplings and census. According to the investigations, only six of the 20 springs were found to host Aphanius transgrediens, and almost all springs were occupied by Gambusia holbrooki. Another two important outcomes of the study were environmental education for local elementary schools and determining some reproductive properties of Aphanius transgrediens under laboratory conditions. As a conclusion of this ongoing study, it was assumed that constructing integrated suitable shelters (e.g. Gambusia-free ponds) which serve as viable stock for Aphanius transgrediens are needed.
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    Growth and total phenolic contents of arthrospira platensis (nordstedt) gomont in response to salicylic acid
    (Uludağ Üniversitesi, 2014-12-23) Tunca, Hatice; Sevindik, Tuğba Ongun; Önem, Burçin; Türdü, Aylin Elif
    In this study, the effects of salicylic acid on growth of Arthrospira platensis (Nordstedt) Gomont were investigated. For this reason, different concentrations of salicylic acid (0.5, 1, 1.5, 2 g L-1 ) were given to cultures, then changes of optical density, chlorophyll-a and total phenolic contents were assessed. OD and methanol extract of chlorophyll-a and phenolic contents were measured by spectrophotometrically. All parameters decreased with increasing salicylic acid concentrations and LC50 value was 1.5 mg L-1 for ninth day. Growth of A. platensis declined with salicylic acid treatment.
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    Comparison of genes of JAK-STAT and PI3K-AKT cycles between cattle and pig in mammary gland
    (Uludağ Üniversitesi, 2014-12-26) Rastgoo, Samaneh; Nasab, Morad Pasha Eskandari
    JAK-STAT and PI3K-AKT cycles are one of the most important transcription factors in regulating gene expression in the mammary gland. In this study aimed to achieve the important and effective genes related to JAK-STAT and PI3K-AKT cycles of mammary gland of cattle and pig, the genes of these cycles extracted from KEGG site and compared with each other by using BLAST Bioinformatics Tools. The results of this study showed that most genes in these cycles are common among cattle and pig and VTN and ATF4 genes which compared to the other genes, had the largest interception in term of sequence and also TF, HP and SPP1 genes are expressed in both groups (cattle and pig) in mammary gland.
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    A comparison the biomass of productivity, protein and lipid content of spirulina platensis cultured in the pond and photobioreactor
    (Uludağ Üniversitesi, 2015-01-12) Azgın, Cansev; Işık, Oya; Uslu, Leyla; Ak, Burcu
    Dry matter, chlorophyll a, optical density, protein and lipid production of microalgae Spirulina platensis cultured in tubular and panel photobioreactors, and pond in June and September were compared. The highest dry matter of 4.951±0.03 gL-1 and 71.89±1% protein were determined from tubular photobioreactor, while the lowest dry matter of 2.710±0.02 gL-1 and 53.92±0.8% protein were recorded from panel photobioreactor. S. platensis cultured in the pond have 3.150±0.08 gL-1 dry matter and 70.29±0,8% protein. The water temperatures in June and September were similar, and it was observed that the culture in the panel was affected to the higher temperature (39.35±1.82 °C, 40.22±0.70 °C), negatively. The highest optical density (3.280±0.009) and lipid (7.74±0.5%) amounts were obtained from the culture produced in the tubular photobioreactors.
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    Acute toxicity of bentazone (herbicide) and chlorpyrifos (insecticide) on oreochromis niloticus (L., 1754) larvae (bioassay)
    (Uludağ Üniversitesi, 2015-01-12) Azgın, Cansev; Göksu, Münir Ziya Lugal
    In this study, in aquatic environments negative effects which may occur in order to have information about, the acute toxicity Bentazone (Herbicide) and Chlorpyrifos (Insecticide) which widely used in agriculture in Cukurova Region has been researched into larvae Oreochromis niloticus (L., 1754). In this study, the test fish O. niloticus larvae (average weight 1.21±0.52 g, average length 4.29±0.2 cm) were obtained from the Çukurova University Fisheries Faculty Freshwater Fish Research and Application Station. In the experiment, five different concentrations together with the control group were used 2 test series. In the present study, methods of bioassay test which static method has been applied. The study was carried out under laboratory conditions at 25±2 oC. The results has been estimated with the dose-response data were fitted a log-logistic model by using R 3.0 statistical computation environment and DRC library. The 24-h acute LC50 values were calculated. According to the results, acute toxic effects researched Bentazone (Herbicide) and Chlorpyrifos (Insecticide) the 24-h LC50 acute toxic lethal concentration values for Oreochromis niloticus (L., 1754) larvae were calculated Bentazone (Herbicide) LC50 14.86±0.19 mgl-1 and Chlorpyrifos (Insecticide) LC50 0.40±0.02 mgl-1.