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    Determination of carbon concentration of tree components for Scotch pine forests in Turkmen Mountain (Eskisehir, Kutahya) Region
    (Istanbul Univ, 2018) Erkan, Neşat; Guner, Sukru Teoman
    The purpose of this study was to investigate the relationship between carbon concentration of different tree components and some ecological factors for Scotch pine (Pinus sylvestris L. subsp. hamata (Steven) Fomin.) In Turkmen Mountain Region. Data were collected from 58 ecologically different sample plots and were evaluated using ANOVA and correlation analysis. Carbon concentration varied significantly within five tree components (p<0.001), with the values ranging from 50.94% for root to 54.75% for bark. We also calculated the weighted carbon concentration as 5237% for Scotch pine forests. Some significant relationships were found between the carbon concentration of tree components and some ecological factors and stand parameters. Site index and elevation negatively correlated with tree component carbon concentration. However, elevation strongly correlated with 1- and 2-year-old needle carbon concentration (p<0.01). We also found that slope position positively correlated with 2- and 3-year-old needles but negatively correlated with bark in terms of carbon concentration. The carbon concentrations that we calculated in this study can be used for calculating the carbon content of either whole tree or any tree component in Scotch pine forests.
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    Effects of afforestation with different species on carbon pools and soil and forest floor properties
    (Elsevier, 2021) Guner, Sukru Teoman; Erkan, Neşat; Karatas, Riza
    Land use and land use change are factors that affect carbon and nutrient stocks in ecosystems. The aim of this research was to determine the effects of forest land use types on carbon pools and soil and forest floor features. This study was conducted in areas afforested with black pine (Pinus nigra Am. subsp. pallasiana Lamb. Holmboe) and Scots pine (Pinus sylvestris L.) and on adjacent bare land within the Akdag Nature Park, which is located in the West-Central Anatolia Region of Turkey. Three 20 x 20 m sample plots were selected within each forest land use, and the diameters at breast height and heights of all trees were measured. Tree biomass and carbon stocks in the unit areas were calculated using tree biomass equations, and carbon conversion factors were developed for two tree species. Within each sample plot, disturbed and core soil samples and forest floor samples were taken at three points at depths of 0-10, 10-20 and 20-30 cm. The physical and chemical properties of the soil and forest floor samples were determined in the laboratory and measurements were converted to a unit area using volume values. The data were evaluated using independent sample t-tests and analysis of variance. The results showed that the ecosystem carbon (C) stocks differed significantly with forest land use type; black pine plantations, Scots pine plantations and bare land accumulated 235.2 t C ha(-1), 206.1 t C ha(-1) and 37.4 t C ha(-1), respectively. We found that in addition to the positive effect of afforestation on soil, black pine had a greater impact on some forest floor and soil characteristics in the region than Scots pine. Thus, we suggest that priority should be given to black pine in afforestation of the region and in other ecosystems with similar climates. Additionally, our results reveal the importance of afforestation on bare lands for reducing the impact of global climate change.