Browsing by Author "Canturk U."

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Chronicles and geoheritage of the ancient Roman city of Pompeiopolis: a landscape plan
(2018-12-01) Cetin M.; Onac A.; Sevik H.; Canturk U.; Akpinar H.
Kastamonu-Pompeiopolis is a protected area with historical, natural, and cultural value and has recently increased in popularity. The aim of this study is to ensure the sustainability of natural and cultural resources via an evaluation to reveal the necessary practices and precautions regarding the area’s landscape plan decisions for the ancient city. Maps of Pompeiopolis were created and the Gülez formula (1990) was used to evaluate the city. Based on the data obtained from the area, we have determined that it has a high recreational potential, and hence this study. We find that the untapped recreational potential of Pompeiopolis has yet to be exploited and reached. According to the formula, Pompeiopolis’s recreational potential is 72%, which means it is considered to be an area of high recreational potential. In conclusion, Pompeiopolis has a wealth of ecotourism activities, including historical and cultural tourism, bird watching, wildlife tours, adventure and sports tourism, photography, camping, picnic activities, and cave exploring. However, management and planning is needed for trekking, hiking, and the rest of the activities in order to ensure long-term sustainability.
Effects of light on morphologic and stomatal characteristics of Turkish fir needles (Abies nordmanniana subsp. Bornmulleriana Mattf.)
(2017-01-01) Sevik H.; Cetin M.; Kapucu O.; Aricak B.; Canturk U.
This study examines the effect of light on the sapling forms of Turkish fir (Abies nordmanniana subsp. bornmulleriana), a species endemic to Turkey and extensively used in landscaping work. Needle samples were taken from seedlings grown in different light conditions. The samples were taken of one-, two-, and three-year-old main shoots and needles on the side branches. The samples were measured to determine needle length, needle diameter, and the number of stoma channels. The total number of 1 mm stoma area changes depending on the light conditions and position are determined. Analysis of Variance and Duncan tests were applied to the obtained data, and results were evaluated. In all the needles, most of the increase in needle position and needle length was determined to be due to the light. The curve of stomas was drawn depending on the light channels and the total number of stoma. The highest value was reached in semi-shade conditions.
Identifying the suitable habitats for Anatolian boxwood (Buxus sempervirens L.) for the future regarding the climate change
(2022-10-01) Varol T.; Canturk U.; Cetin M.; Ozel H.B.; Sevik H.; Zeren Cetin I.
Distribution of tree species is a function of climatic (such as temperature and precipitation) and topographic (such as altitude, slope, and exposure) parameters. It is thought that any change in climatic parameters would be one of the most effective factors to influence the distribution of species. The adaptation of populations would depend on the phenotypic variation, strength of selection, interspecies competition, and biotic interactions. Moreover, many ecologic and anthropogenic processes that are related with each other would affect the distance of distribution. Hence, the detailed and reliable information about the geographical distribution of species under changing climate conditions is of significant importance for various ecologic and protection practices. For this reason, the present study focused on the estimation and analysis of the potential distribution of Anatolian boxwood in different scenarios (SSPS245 and SSPS585) and the estimation and analysis of environmental factors influencing this distribution. Using the current and future (2040-2060-2080-2100) climate scenarios, the habitats that are suitable for the distribution of Anatolian boxwood in Turkey were modeled using the maximum entropy model and then mapped using ArcGIS software. In determining the potential distribution areas, 21 parameters (19 bioclimatic and 2 topographic variables) were used in 21 field-based formation points. The results showed that the most important variables affecting the distribution of species were annual mean temperature (Bio1), minimum temperature of the coldest month (Bio6), mean temperature of the coldest quartile (Bio11), precipitation of the driest month (Bio14), precipitation of the driest quartile (Bi017), and precipitation of the warmest quartile (Bio18). According to two future climate change scenarios, the estimation models showed that there might be decreases up to 6% in Anatolian Boxwood population in years 2040–2060 and, in year 2100; the potential area of distribution will shift to north and higher altitudes in comparison to the current ones and increase by 1–4%. The human help needed for maintaining the existence of new species in the suitable distribution areas suggests the necessity of reviewing and re-designing the current forestry plans and silvicultural practices within the context of climate change.
Impacts of climate change scenarios on European ash tree (Fraxinus excelsior L.) in Turkey
(2021-07-01) Varol T.; Canturk U.; Cetin M.; Ozel H.B.; Sevik H.
Climate change is expected to have various impacts on forest ecosystems through drought, heat stress, insect invasions and forest fires. Therefore, lack of taking the necessary measures in time will lead to the extinction or endangerment of valuable species. The entropy method was used in order to estimate the geographic distribution of Fraxinus excelsior L. available in Turkey under present and future climate conditions. 19 bioclimatic variables obtained from the monthly data within 30 provinces, where Fraxinus excelsior L. was found in Turkey, as well as the topographic variable of elevation were used in the modelling process. The results show that Fraxinus excelsior L. is largely affected by precipitation in the driest month, the driest quarter and the hottest quarter. According to the response curve of Fraxinus excelsior L. in Turkey, it is observed that it prefers the habitats with average precipitation of 22 mm in the driest month, average precipitation of 100 mm in the driest quarter and the precipitation over 70 mm in the hottest quarter. The SSPs 245 and SSPs 585 climate scenarios, respectively, show that the geographic distribution of Fraxinus excelsior L. will narrow by 7.58% and 6.28% in 2100. All of these results show that species response to the individual and communal impacts as well as the impacts at ecosystem scale dictated by climate change by changing their climatic niches. Most of the plant species that lack an effective and rapid migration ability will have difficulty in finding suitable habitat areas. Thus, the ecological consequences of the narrowing experienced in the foreseen borders may have serious consequences for both the management and protection of forests.