Sürdürülebilir Kalkınma Amaçları
Yayınlar
- MakaleAçık Erişim2020Cohabitant charophyte algal flora and its ecology in high-mountain lakes of the Artabel Lakes Nature Park (Gumushane, Turkey)
Şahin, Bülent; Akar, Bülent; Barinova, Sophia
The composition of charophyte taxa and their habitat preferences in water bodies of the Artabel Lakes Nature Park were investigated on 15 August 2013 and 13 August 2016. A total of 73 taxa belonging to Conjugatophyceae (Zygnematophyceae) and Klebsormidiophyceae were recorded. The genera Cosmarium (37), Staurastrum (10) and Closterium (7) were most abundant. The partly unexpected presence of certain desmid taxa, i.e., taxa characteristic of eutrophic water, was recorded. Filamentous charophytes were represented by three taxa. The Willis curve for the distribution of species to genera had a trend line of R2 = 0.9123. Bioindication, statistical methods and comparative floristic results show that water in all of the studied lakes was fresh, of low-conductivity, circum-neutral and with little organic pollution. Four groups of lakes were identified as a result of statistical comparison of their environmental and biological variables. Bioindication results can be used as references for future monitoring of the lakes in protection of the species found in the Artabel Lakes Nature Park and can also be included in the National Water Quality Standard System of Turkey.
- MakaleAçık Erişim2020Non-Diatom Algae of the High Mountain Protected Lakes in the Artabel Lakes Nature Park, Gümüşhane, Turkey
Şahin, Bülent; Akar, Bülent; Barinova, Sophia
For the first time, we studied 18 lakes of the Artabel Lakes Nature Park and revealed 154 species of non-diatoms algae from four taxonomic Divisions. Charophyta (73 taxa) prevails in the flora and mainly represented by the genus Cosmarium (37). Cyanobacteria (42), Chlorophyta (30) and Eunlenozoa (9) are also present. New records for the Turkish algae flora are represented by 31 taxa, most of which belong to Cosmarium (15) and Staurastrum (5). Rare species from benthic cyanobacteria were revealed in communities of the Artabel Lake. Statistical methods revealed a high individuality of the algae communities and divided it into two major group: Acambol–Yıldız, and Beş–Artabel, which belong to different River Basins. The altitude of the lakes appears to be the major environmental variable that controls the non-diatom algal diversity. Bioindication characterized the water of studied lakes as temperate by temperature, middle saturated with oxygen, neutral to low acidic pH, low saline, Class 2–3 of Water Quality and mesotrophic.
- MakaleAçık Erişim2019Identification of Antioxidant Activity by Different Methods of a Freshwater Alga (Microspora sp.) Collected From a High Mountain Lake
Akar, Zeynep; Akar, Bülent; Şahin, Bülent
Algae contain a large amount of biological active compounds functioning as antioxidant,antimicrobial and anti-tumour. In the present research, antioxidant activity of freshwateralga Microspora sp. (Chlorophyta) extract prepared in different solvents (methanol,acetonitrile, ethanol, acetone and ethyl acetate) was determined with three differentmethods; 2,2-diphenyl-1-picrylhydrazyl (DPPH•), Iron (III) Reduction / AntioxidantPower (FRAP) Assay and Copper (II) Reductive Antioxidant Activity (CUPRAC). Thealga samples collected from the high mountain lake (2733 m above sea level) localized inGümüşhane province of Turkey. The algal extracts prepared in different solvents showedantioxidant activity. The values of DPPH• varied from 8.97% (in acetonitrile extract) to31.15% (in methanol extract). As in the DPPH• method, the lowest and highest values inthe FRAP method were measured based on μM TEAC (Trolox Equivalent AntioxidantCapacity) in methanol and acetonitrile extracts as 60.303 μM and 359.394 μM respectively.While the lowest value of CUPRAC test was determined in acetonitrile extract (0.041 μMTEAC ) as in the other tests, highest value was measured in ethanol extract (0.101 μMTEAC ). The values of highest antioxidant activity in both DPPH• and FRAP methodswas measured in the methanol solvent whilst was determined in the ethanol solvent forCUPRAC.
- MakaleAçık Erişim2019New records from Artabel Lakes nature park (Gümüşhane/Turkey) to the freshwater algal flora of Turkey
Şahin, Bülent; Akar, Bülent
Six newly recorded taxa, Chlamydomonas pertusa Chodat, Coenochloris pyrenoidosa Korshikov, Coenocystis tapasteana Komárek, Katagnymene accurata Geitler, Phormidium stagninum Anagnostidis, and Scytonema coactile Montagne ex Bornet & Flahault, were described from epipelic, epilithic, and epiphytic materials of the 17 high mountain lakes and a pond in Artabel Lakes Nature Park. The morphology of all species was examined by light microscopy. In this paper, the morphology, ecology, and distribution of these species are discussed. Photos of the species are also provided.
- MakaleAçık Erişim2019New desmid records from high mountain lakes in Artabel Lakes Nature Park, Gümüşhane, Turkey
Şahin, Bülent; Akar, Bülent
The algal flora of 17 lakes and 1 pond in the Artabel Lakes Nature Park were investigated during two summer seasons (2013 and 2016). In total, 26 desmid taxa were found and identified as new records for the desmid flora of Turkey based on their morphotaxonomic characteristics and ecological preferences. The taxa identified belong to the genera Actinotaenium (1), Closterium (1), Cosmarium (15), Micrasterias (1), Spondylosium (1), Staurastrum (5), Teilingia (1), and Tetmemorus (1). Morphotaxonomy, ecology, and distribution of each species were discussed in detail.
- MakaleYalnız künye2018Nine new records from high mountain lakes (Artabel Lakes Nature Park, Gümüşhane/Turkey) for the freshwater diatom flora of Turkey
Akar, Bülent; Şahin, Bülent
This study was carried out in 17 high mountain lakes and a pond in the Artabel Lakes Nature Park (Gümüşhane)on August 15, 2013 and August 13, 2016. In the present study, epipelic, epilitic and epiphytic algal flora of lakes weredetermined and a total of 95 taxa were recorded belonging to Bacillariophyta division. 9 of the taxa belonging toBacillariophyta were determined to be new records for the freshwater diatom flora of Turkey. These taxa were identifiedas Aulacoseira lacustris (Grunow) Krammer f. tenuior Houk, Klee and Passauer, Orthoseira roeseana (Rabenhorst)Pfitzer, Cyclotella ambigua Grunow, Planothidium distinctum (Messikommer) Lange-Bertalot, Psammothidiumhelveticum (Hustedt) Bukhtiyarova and Round, Diploneis petersenii Hustedt, Frustulia crassinervia (Brébisson exW.Smith) Lange-Bertalot and Krammer, Eunotia mucophila (Lange-Bertalot, Nörpel–Schempp and Alles) LangeBertalotand E. paludosa Grunow
- MakaleAçık Erişim2017Diversity and ecology of benthic diatoms in karagöl lake in karagöl-Sahara national park (Şavşat, Artvin, Turkey)
Akar, Bülent; Şahin, Bülent
The main goal of this study is to determine the composition, diversity and ecology of benthic diatoms in Karagöl Lake in Karagöl-Sahara National Park. Monthly sampling (from sediments, stones and aquatic plants in littoral zone of the lake) taken in three consecutive years revealed 57 diatom taxa with Gomphonema and Pinnularia being the most abundant species while other genera are represented with three or fewer species. Lindavia ocellata was the most dominant taxon in the samplings examined throughout the whole study. The values of diversity and evenness indices are high during the spring and early summer. Based on cluster analysis for monthly samples of epipelic diatom, there are two different groups at the lowest similarity level. The associations between August 2010 and September 2010 months are the most significant with 86.02%. The organism number of epipelic diatoms showed positive correlation (P<0.01) with dissolved oxygen, while negative correlation (P<0.05) with temperature. Detailed floristic and ecological examination of the benthic diatom communities has not been carried out before this study in this lake. Therefore, this study is the first to our knowledge towards revealing aquatic benthic diatom biodiversity of Karagöl-Sahara National Park and provides basis for future investigations.
- MakaleYalnız künye2014Karagöl- Sahara Milli Parkı ndaki (Şavşat-Artvin/Türkiye) Karagöl den yeni desmid kayıtları
Akar, Bülent; Şahin, Bülent
The benthic algal flora of Karagöl Lake (Şavşat, Artvin) was investigated between October 2008 and September 2010.Actinotaenium diplosporum var. americanum, Cosmarium pseudoexiguum, Gonatozygon kinahanii, Staurastrum boreale var.quadriradiatum, S. hantzschii and Staurodesmus dejectus var. apiculatus were recorded for the first time for the desmid floraof Turkey.
- MakaleYalnız künye2014New desmid records of Karagöl Lake in Karagöl-Sahara National Park (Şavşat-Artvin/Turkey); [Karagöl-Sahara Milli Parki{dotless}'ndaki (Şavşat-Artvin/Türkiye) karagöl'den yeni desmid kayi{dotless}tlari{dotless}]
Akar, Bülent; Şahin, Bülent
The benthic algal flora of Karagöl Lake (Şavşat, Artvin) was investigated between October 2008 and September 2010. Actinotaenium diplosporum var. americanum, Cosmarium pseudoexiguum, Gonatozygon kinahanii, Staurastrum boreale var. quadriradiatum, S. hantzschii and Staurodesmus dejectus var. apiculatus were recorded for the first time for the desmid flora of Turkey.