Cilt:31 Sayı:02 (2022)

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Browsing Cilt:31 Sayı:02 (2022) by Author "Other"

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    Çubuk stream pollution and environmental effects
    (Ankara Üniversitesi Fen Fakültesi, 2022) Atıcı, Tahir; Other; Other
    The water quality parameters of Çubuk Stream were examined in terms of physical and chemical aspects and the pollution level of Çubuk Stream was determined by comparing these parameters with the Surface Water Quality Regulation (SWQR). For this purpose; samples were taken from three different stations between August 2012 and April 2013, the water samples were compared with each other and with previous studies, the water quality of Çubuk Stream was determined according to the surface water quality regulation. In our study, the biological oxygen requirement of Çubuk Stream according to SWQR (BOD5: 22.5mg/l) IV. class, ammonium nitrogen element (NH4–N:2.34 mg/l) IV. class, nitrite nitrogen element (NO2–N: 0.035 mg/l) II. class, nitrate nitrogen element (NO3 –N:0.95 mg/l) Class I, according to phosphate value (PO4:0.075 mg/l) Class I and trace elements (Pb, Cd, Cr, Ni, Mn) values Class I. water quality. According to the ratio of NH4-N/PO4 (2.34/0.075=31.2 mg/l), the element that limits eutrophication in Çubuk Stream is P. Compared to previous studies, after the wastewater treatment plants established in the region, higher quality water is provided, especially in terms of NO3 and PO4. It has been determined that the nitrogen and phosphorus ratios are high because the region, which is dense in terms of organic matter, is close to industrial establishments.
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    First records for benthic macroinvertebrate fauna in Güzeldere Waterfall, Turkey
    (Ankara Üniversitesi Fen Fakültesi, 2022) Arslan, Naime; Other; Other
    In this paper, the benthic macroinvertebrate fauna of the Güzeldere Stream and Waterfall were investigated. Samples were collected in October 2020 at 3 stations. A total of 41 taxa including Gastropoda, Oligochaeta (9 species), Ephemeroptera (7 species), Odonata, Coleoptera, Chironomidae (15 species), Simuliidae, Blephariceridae (2 species), Plecoptera (3 species), and Trichoptera (1 species) were identified in the area. The dominant taxon was Chironomidae at all three stations followed by Oligochaeta and Ephemeroptera, respectively. The second station had the highest individual numbers (195) and the highest species diversity (32). All of the identified taxa were the first records for the study area because there have been no studies conducted for the determination of the Güzeldere Stream and Waterfall.
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    Rediscovery of an ancient herbarium for Turkish botanical history: Bolu Girls Village Institute Herbarium
    (Ankara Üniversitesi Fen Fakültesi, 2022) İkinci, Nursel; Other; Other
    Bolu Girls’ Village Institute Herbarium (Bolu Kız Köy Enstitüsü Herbaryumu) was founded in 1953 by Muhittin Fehmi Özgen. It is one of the earliest herbaria of the Turkish Republic. The herbarium was part of the natural history collections of the school which also included insects, minerals, and fossils. The herbarium initially contained around 2500 specimens within 72 cardboard boxes. Additionally, specimens from this herbarium were sent to İstanbul University Department of Biology Herbarium (ISTF) and around 600 specimens to the herbarium of Royal Botanic Garden Edinburgh (E). In 2006, we received 567 plant specimens in five boxes. The plants were mainly collected from Bolu and neighboring provinces between 1953 and 1958. The herbarium collection contains one bryophyte specimen and three seedless vascular plants. The remaining taxa belong to gymnosperms and angiosperms. The herbarium labels were prepared both in Latin and Turkish. Majority of the specimens have identification up to family and genus level and a small number of them up to species level. This herbarium remained largely unknown to Turkish botanists. Therefore, we think it is valuable to provide detailed information about the history and the content of the herbarium. The information given here not only will contribute to our knowledge about the natural history collections of Turkey but also to the education history of the Turkish Republic.