Person: SEVGİ, ECE
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Publication Metadata only An ethnobotanical survey of medicinal plants in Biga (Çanakkale-Turkey)(2022-07-01) Sevgi E.; Kızılarslan Hançer Ç.; Akkaya M.; Altundağ E.; Büyükkılıç-Altınbaşak B.; SEVGİ, ECE; KIZILARSLAN HANÇER, ÇAĞLAPublication Metadata only EGE BÖLGESİNDE GELENEKSEL KULLANIMI OLAN AĞAÇ TÜRLERİNİN YÖRESEL ADLARI(2022-12-01) SEVGİ E.; AKKEMİK Ü.; SEVGİ, ECEPublication Metadata only Tree rings of Quercus ilex L. and their relationships with some wood anatomical features and growing site conditions in Türkiye(2023-01-01) AKKEMİK Ü.; YILMAZ H.; SEVGİ O.; ÇELİK ONAR H.; YILMAZ O. Y.; SEVGİ E.; Genç S.; AKARSU F.; Doğan Ö. H.; SEVGİ, ECEQuercus ilex (Holm oak) presents itself as trees up to 14–15 m tall in suitable growing site conditions and as shrubs in unsuitable areas. The purpose of this study was to determine the relationships between tree-ring widths of Q. ilex and vessel features, tree diameters, climate, and site conditions throughout Türkiye. A total of 1020 cores from 510 trees were collected from 102 sampled sites throughout Türkiye. After using standard dendroclimatology methods, all tree-ring analyses were performed on these chronologies. As a result, tree-ring boundaries were found to be less visible in Türkiye, like in other Mediterranean areas. Mean sensitivity ranged from 0.32 to 0.48 in different regions. Temperature during spring and summer months in the Mediterranean region has a negative effect on tree-ring widths in general. Winter temperature generally has a positive effect on tree-ring growth, and an increase in winter temperature may promote tree-ring width. Monthly total precipitation from November to July has a significant positive effect on tree-ring width and it is higher in the Aegean Region. While tree rings are wide in the trees found in lowlands, they are narrow in shrubs and at high elevations. There are clear negative relationships between tree-ring width and elevation, the amount of leaves in the litter, total litter amount, organic carbon, and soil pH. Regarding tree height, tree diameter, and vessel features, they have positive and high correlations with tree-ring width, except vessel frequency, which has a significant negative correlation. As a result of grouping, while the ratio of sites belonging to the dry group is low in regions that have trees with wide tree rings, the ratio of sites of the dry group is very high in İzmir and Datça, which have trees with narrow tree rings. The region with the widest rings is the Marmara Region, followed by the western Black Sea and the northern and southern Aegean, respectively. In conclusion, Q. ilex is a species that survives in both xeric and humid sites. It has adapted to dry conditions by forming narrow tree rings in Datça and continues to be found in tall bush-shrub forms with individuals over 140 years old. Specimens of the same age are in the form of trees with diameters of 50–60 cm and heights of 10–15 m in Ereğli. For these reasons, this species should be taken into consideration in afforestation and given priority in protection in its natural habitats where soil conditions are favorable, at a maximum distance of 23 km from the sea and in near-coastal areas.Publication Metadata only AĞI ve AĞU SÖZCÜKLERİNİN YÖRESEL BİTKİADLARINDA KULLANIMININ DEĞERLENDİRİLMESİ(2023-12-01) Nomer N. Z.; Sevgi E.; NOMER, NACİYE ZEYNEP; SEVGİ, ECEPublication Metadata only The missing part of the past, current, and future distribution model of Quercus ilex L.: the eastern edge(2024-04-01) YILMAZ O. Y.; AKKEMİK Ü.; Doğan Ö. H.; YILMAZ H.; SEVGİ O.; SEVGİ E.; SEVGİ, ECEOngoing climate change is anticipated to shift the geographical distribution range and impact local abundance of tree species by altering their ecological conditions. Given the lower resilience of populations at the species’ range edges, locally adapted range-edge populations are critical to the species’ survival under climate change. In this context, the distribution of holm oak (Quercus ilex L.) at the eastern border of its distribution range was assessed under current, past, and foreseeable future climate change scenarios, using species distribution models (SDMs). Current SDMs were developed using World-Clim 1.4 climate data as baseline at 30-second spatial resolution by using Generalized Boosted Regression Models (GBM) and showed moderate model performance. To compare temporal transferability and account for climate uncertainties of two versions of future climate data (CMIP5 and CMIP6), we used 4 Global Circulation Models (GCMs), 2 emission scenarios (moderate RCP45/SSP245 and pessimistic – RCP85/SSP585) for 2 different periods in the future (2040-2060 and 2060-2080). We also made predictions about the past (Mid-Holocene, about 6,000 years ago) using 4 CMIP5 GCMs. Most important variables of SDMs were distance to the sea, isothermality (BIO3), annual precipitation (BIO12), the mean temperature of driest quarter (BIO9), and the precipitation of driest month (BIO14). Our findings showed that the species’ potential distribution range probably used to be much wider in the mid-Holocene, which implies that the holm oak had a broader climatic niche during this period. The future projections indicate that its distribution area in the eastern border might increase particularly in the Black Sea region, while decreasing in the Aegean region resulting in a likely northward range shift in Turkey. However, other variables not included in our models such as land use changes might drive future shifts. Due to its high resistance to dry conditions and resilience, this species might continue to spread in southwestern Turkey in 2050s and 2070s. Finally, our study fills the gap in potential distribution predictions in context of climate change for the eastern boundary of the holm oak.