Yazar "Mert, Ahmet" seçeneğine göre listele

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    Climate change and the fate of endemic Beyşehir Frog, Pelophylax caralitanus
    (Amphibian and Reptile Conservation, 2022) Kıraç, Akın; Gidiş, Müge; Mert, Ahmet; Başkale, Eyup
    Global warming and the decline in precipitation threaten wetlands worldwide, and lakes in some regions are in the process of drying. Amphibians, since they are water-dependent, will be the creatures most affected by the rapid habitat losses due to climate change. Especially for amphibian species which are endemic, the situation will be more serious in terms of its impact on biodiversity. Therefore, in this study, we determined the climate characteristics specific to the habitats of an endemic amphibian species, Pelophylax caralitanus. According to the Representative Concentration Pathways (RCP) climate change scenarios of the ICPP, we analyzed whether the climatic characteristics specific to these habitats will exist in 2050 and 2070 under the criteria of RCP 2.6, RCP 4.5, RCP 6.0, and RCP 8.5. The results are quite alarming for Pelophylax caralitanus. According to the RCP climate change scenarios, the climatic conditions in the present habitats of this endemic amphibian species will not remain stable in that the potential habitats in Southwestern Anatolia will be dramatically reduced and the appropriate habitats of P. caralitanus around the Turkish Lake District will completely disappear, while some new potential habitats will emerge in the Northwest Aegean region of Turkey. © 2022. Kıraç et al. All Rights Reserved.
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    Öğe
    Climate change and the fate of endemic Beysehir Frog, Pelophylax caralitanus
    (Amphibian Conservation Research Center & Lab, 2022) Kirac, Akin; Gidis, Muge; Mert, Ahmet; Baskale, Eyup
    Global warming and the decline in precipitation threaten wetlands worldwide, and lakes in some regions are in the process of drying. Amphibians, since they are water-dependent, will be the creatures most affected by the rapid habitat losses due to climate change. Especially for amphibian species which are endemic, the situation will be more serious in terms of its impact on biodiversity. Therefore, in this study, we determined the climate characteristics specific to the habitats of an endemic amphibian species, Pelophylax caralitanus. According to the Representative Concentration Pathways (RCP) climate change scenarios of the ICPP, we analyzed whether the climatic characteristics specific to these habitats will exist in 2050 and 2070 under the criteria of RCP 2.6, RCP 4.5, RCP 6.0, and RCP 8.5. The results are quite alarming for Pelophylax caralitanus. According to the RCP climate change scenarios, the climatic conditions in the present habitats of this endemic amphibian species will not remain stable in that the potential habitats in Southwestern Anatolia will be dramatically reduced and the appropriate habitats of P. caralitanus around the Turkish Lake District will completely disappear, while some new potential habitats will emerge in the Northwest Aegean region of Turkey.
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    Öğe
    GIS AS A TOOL TO MAP HABITAT SUITABILITY FOR TWO LIZARD SPECIES USING ENVIRONMENTAL FACTORS
    (Parlar Scientific Publications (P S P), 2019) Mert, Ahmet; Kirac, Akin
    Reptiles are key components of Mediterranean ecosystems. Climate change, forest management practices, agricultural activity, land degradation and forest fragmentation represent the greatest threats to reptiles. Therefore, efficient tools are necessary for monitoring these vulnerable species. Habitat suitability maps have been found to be valuable tools for the monitoring of reptilian species and conservation, particularly across broad landscapes. This study was undertaken to determine the relations between two species of lizard, Stellagama stellio (Agamidae) and Ophisops elegans (Lacertidae) and environmental variables in the Isparta-Siiteiller district (Turkey). Habitat suitability maps were then produced. The relationship between the two species and 21 environmental variables were analyzed using MaxEnt and mapped with ArcGIS. The study showed that bedrock, annual precipitation, slope, ruggedness, stream density, topographic position index, land cover/use classes and altitude are predictor variables for modelling Stellagama stellio. The environmental factors that create the optimum habitat suitability model for Ophisops elegans were bedrock, annual precipitation, slope, ruggedness, landform index, land cover/use classes and stream density. In conclusion, we found that environmental variables and geographic information systems can successfully be used to generate habitat suitability maps for Stellagama stellio and Ophisops elegans.
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    Modelling and Mapping of Microrefugial Areas
    (Türk Eğitim-Sen, 2022) Kıraç, Akın; Mert, Ahmet
    Anadolu'nun Akdeniz Bölgesi, tarihsel iklim değişikliğinden bu yana biyoçeşitliliği koruyan, endemizmi destekleyen ve sığınak niteliğinde bir bölgedir. Refugia'nın insan kaynaklı iklim değişikliği karşısında aynı korumayı ve desteği sürdürmesi beklenebilir. Ancak hızlı ısınma ve yağıştaki azalma sığınak alanlarını daha küçük alanlara bölebilir. Bu durum, yüzyılın sonunu beklemeden, uygun olmayan iklim koşulları arasında organizmalar için uygun iklimleri barındıran mikrorefujilerin araştırılmasını gerekli kılmıştır. Bölgenin biyolojik çeşitliliğini oluşturan önemli türlerin iklim değişikliği senaryolarının etkisi altındaki dağılımını tahmin etmeyi ve bu dağılımların kesiştiği noktadaki mikro sığınma alanlarını belirlemeyi amaçladım. (üçü endemik), refugia'yı temsil ettiği varsayılmıştır. MaxEnt yardımıyla türlerin mevcut ve iklim senaryolarına göre dağılımını tahmin ettim. HadGEM2-ES model tabanlı RCP 2.6, RCP 4.5 ve RCP 8.5 senaryolarında potansiyel iklim haritalarındaki dağılımın kesiştiği noktada mikrorefuji oluşabileceğini öne sürdüm. Modelin sonuçları, türün uygun habitatlarının gelecekteki iklim değişikliğinin etkisi altında iyi senaryodan kötü senaryoya doğru azalacağını göstermiştir. Modeller ayrıca en kötü iklim koşullarında bile uygun iklim koşulları sağlayan alanları gösterdi. Mikrorefüjleri, temsilci olarak seçilen 6 tür için uygun iklim koşullarını sağlayan ortak alanlar olarak belirledim. İklim değişikliği, belirli iklim gereksinimleri olan dar bir şekilde dağılmış endemik türler gibi organizmaların yok olmasına yol açabilir. Mikro sığınak alanlarının belirlenmesi ve korunması, türleri iklim değişikliğine ve antropojenik habitat tahribatına karşı korumanın en etkili yoludur. Antropojenik iklim değişikliği sırasında, mikro sığınma alanları biyolojik çeşitliliği koruyacak ve endemizmi destekleyecektir. Bu nedenle mikrorefüjler önemlidir ve bu alanlar koruma planlarına dahil edilmelidir
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    Öğe
    Will Danford's Lizard Become Extinct in the Future?
    (Hard, 2019) Kirac, Akin; Mert, Ahmet
    Climate change created predominantly by burning fossil fuels leads to increased pressure on biodiversity. It may cause extinction in lizard species over the forthcoming years. Lizard species that are unable to adjust rapidly enough to the ecological alterations due to climate change are particularly under threat. Therefore, vulnerable lizard species should be monitored and adopt climate change scenarios. This study examines the changes in the habitats of Danford's lizard (Anatololacerta danfordi) according to the RCP 4.5 and RCP 8.5 (HADGEM2-ES) climate scenarios. We modelled the current habitat preferences of A. danfordi using the MaxEnt method based on the bioclimatic features derived from Worldclim. Our results showed that A. danfordi prefers habitats with the bioclimate features including 12 mm for precipitation of driest month, 1-2 degrees C for mean temperature of wettest quarter, -4 degrees C for min temperature of coldest month, and 600 mm for annual precipitation. We determined the potential distributions of the A. danfordi using the model and GIS facilities for both RCP 4.5 and RCP 8.5 climate scenarios. In conclusion, the potential habitats of this lizard species may be dramatically influenced from two climate scenarios. We envisage that the suitable habitats may be mostly relocated from the south toward the north. A. danfordi may not adapt this rapid change and may not migrate to new suitable locations within this short period. Therefore, governments should make provisions against climate change without delay.