Browsing by Author "Erdem, R."

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Bazı Orman Ağaçlarının Yetiştiği Topraklarda Fe Konsantrasyonlarının Ağaç Türü, Organ ve Toprak Derinliğine Bağlı Değişimi
(2024) Erdem, R.
Bitki gelişimini şekillendiren en önemli faktörlerden birisi topraktaki besin elementleridir. Bitki beslenmesi için mutlak gerekli besin elementlerinden olan demir (Fe) bitki büyümesi ve gelişiminde önemli bir yere sahiptir. Bu sebeple tarım topraklarında Fe konsantrasyonunun değişimi konusunda çok sayıda çalışma yapılmıştır. Oysa orman ağaçlarının yetiştiği topraklarda konu ile ilgili çalışma sayısı oldukça sınırlıdır. Bu çalışmada Fe’in farklı orman ağaçlarının doğal olarak yetiştiği topraklarda topraktaki ve bitki organlarındaki konsantrasyonlarının incelenmesi amaçlanmıştır. Çalışma kapsamında karaçam, sarıçam, göknar ve kayın türlerinden yaprak, kabuk, odun, kozalak ve kök örnekleri ile her ağacın dibinden yüzey, orta ve derin topraklardan numuneler alınmıştır. Çalışma sonucunda Fe konsantrasyonlarının bitkilerde, topraktakinden çok daha düşük konsantrasyonlarda olduğu belirlenmiştir. Bitki organlarında elde edilen en yüksek Fe konsantrasyonu kayın köklerinde elde edilmiş olup 529,32 ppm’dir. Oysa topraklardaki Fe konsantrasyonunun 8253,91 ppm ile 16848,88 ppm arasında değiştiği belirlenmiştir.
Change in Some Heavy Metal Concentrations in Forest Trees by Species, Organ, and Soil Depth
(2023.01.01) Erdem, R.; Aricak, B.; Cetin, M.; Sevik, H.
Heavy metal pollution is one of the most important environmental problems nowadays, and studies on monitoring and reducing heavy metal pollution are among the popular and high-priority study subjects. It was stated that the most effective instrument in monitoring heavy metal pollution and reducing pollution is the plants. However, the heavy metal accumulation potential remarkably differs among the organs of plants. Within the scope of this study, the concentrations of Cu, Mn, and Al, which are among the most dangerous and important heavy metals for human health, in the soils in which forest tree species Pinus nigra Arnold., Pinus silvestris L., Fagus orientalis Libsky., and Abies nordmanniana subsp. bornmulleriana Mattf. are grown and analyzed at different soil depths and in leaf, bark, wood, cone, and root organs. As a result, the highest concentrations were found in cone and bark for Cu, leaf for Mn, and root for Al. For this reason, among the elements examined here, it is estimated that Mn is taken into the plant body mainly from the air through leaves, and Al is mainly taken from the soil via roots. The results obtained here suggest that the transfer of all three elements between organs was very limited and that species utilize elements in the soil at different levels. Study results might provide important information about which species can be used in reducing heavy metal pollution in which environment.
Shifts That May Appear in Climate Classifications in Bursa Due to Global Climate Change
(Istanbul University-Cerrahpaşa, 2024) Arıcak, B.; Cantürk, U.; Koç, İ.; Erdem, R.; Şevik, H.
Global climate change (GCC) is defined as a process that is considered the most crucial problem of the current century and will affect all living things and ecosystems in the world. In order to specify the potential impacts of this phenomenon, which does not seem possible to stop, it is necessary first to predict the change in climate types. Therefore, the current study aimed to define the shift of climate classifications (according to De Martonne, Erinç, and Emberger climate category) in 2040, 2060, 2080, and 2100 for Bursa, one of the largest cities in Türkiye, according to the SSPs 245 and SSPs585 scenarios, and compare it with its current situation. As a result, it was determined that the climate types in Bursa province would change significantly and primarily manifest as a shift into arid climate types. It is recommended to take precautions on a sectoral basis to avoid the devastating effects of GCC.
Shifts That May Appear in Climate Classifications in Bursa Due to Global Climate Change
(2024.01.01) Aricak, B.; Cantuerk, U.; Koç, I.; Erdem, R.; Sevik, H.
Global climate change (GCC) is defined as a process that is considered the most crucial problem of the current century and will affect all living things and ecosystems in the world. In order to specify the potential impacts of this phenomenon, which does not seem possible to stop, it is necessary first to predict the change in climate types. Therefore, the current study aimed to define the shift of climate classifications (according to De Martonne, Erin & ccedil;, and Emberger climate category) in 2040, 2060, 2080, and 2100 for Bursa, one of the largest cities in T & uuml;rkiye, according to the SSPs 245 and SSPs585 scenarios, and compare it with its current situation. As a result, it was determined that the climate types in Bursa province would change significantly and primarily manifest as a shift into arid climate types. It is recommended to take precautions on a sectoral basis to avoid the devastating effects of GCC.
Variation in Pb and Zn concentrations in different species of trees and shrubs and their organs depending on traffic density
(2023.01.01) Guney, D.; Koç, I.; Isinkaralar, K.; Erdem, R.
Global population growth and increasing urban population density together are responsible for many disruptions such as environmental pollution, especially air one. Trace metals are of specific prominence as air pollutants because they are conservative pollutants. They tend to accumulate biologically; some have poisonous or carcinogenic effects, even at small concentrations. Among toxic trace metals, lead (Pb) and zinc (Zn) can be harmful to human health in certain quantities. These trace metals were included in primary pollutant lists of the Agency for Toxic Substances and Disease Registry. Therefore, determining these trace metal concentrations in the air and monitoring the differences is very important for determining the risky districts and the level of risk. Biomonitors are the most important indicators of differences in trace metal concentrations in the atmosphere. The plants chosen as biomonitors intake several of the trace metals from the soil and/or the air into their bodies and determining the level of this accumulation might provide insight into the trace metal pollution of the atmosphere and soil. The present study aims to determine the variations of Pb and Zn concentrations in various landscaping plants growing in different districts of Kastamonu (Turkiye) depending on tree species, organs and traffic density. It was found that unwashed leaves of Acer negundo L. can be suggested as a good biomonitor for the presence of both analysed trace metals.
Variation of Magnesium, One of the Macronutrients, in Some Trees Based on Organs and Species
(2024.01.01) Erdem, R.; Koc, I.; Cobanoglu, H.; Sevik, H.
Plants' ability to perform the expected functions depends on their ability to grow and develop healthily. Environmental factors shape plant growth, and nutrients are one of the most main features affecting plant development. Magnesium, one of the macronutrients for plants, is necessary for plant growth and development. It is also one of the essential heavy metals, and it is critical to watch the change in its concentration in the air regarding human and environmental health. This study aimed to reach information about the change of magnesium concentration in some trees based on species and organs as well as its transfer after it is taken into the plant. In addition, it is aimed to observe the variation of magnesium contamination in the air and to determine the species that can be used to reduce pollution. For this purpose, log samples from Cedrus atlantica , Pinus pinaster , Picea orientalis , Cupressus arizonica , and Pseudotsuga menziesii trees were used. As a result, it has been shown that the transfer of magnesium concentration in the wood of the studied species is limited. While the highest magnesium accumulation was obtained in Cupressus arizonica species, the highest concentrations were obtained in the outer bark and the lowest in the inner bark as the plant organ. In addition, it has been determined that the magnesium concentration in the air is related to the traffic density.