Diameter-Height Growth Performance of Natural Species of Central Anatolian Forest Steppe in Terms of Influencing Site Conditions

Trees' height (H) and diameter (D) growth depend on many factors vary between species. This study examined H D of Juniperus excelsa, J. foetidissima, Pinus nigra, Quercus cerris Q. pubescens, growing naturally in the Central Anatolian forest steppe site conditions (human impact, woody plant coverage, tree density, altitude, exposure) that influence growth. The present hypothesises decline might indicate limited rainfall region. Two datasets were distinguished for statistical analysis: first comprised maximum (MH) (MD), human density sampling plots, second all measured Hs Ds exposition, altitude. Variance correlation analysis applied to both determine relationships parameters. Non-linear regression was provide H-prediction equations. According results analyses two datasets, each species reacted differently conditions. However, most relevant relationship found MH-MD D-H P. nigra (except altitude) + pubescens impact) did not respond any remarkably, while those foetidissima responded examined. affected by exposure. While highest number trees N-exposed slopes, heights N- NW-exposed slopes. non-linear equations involved different parameters, even though only variable prediction. Although it is possible reach a definite conclusion other within scope this study, had shorter Anatolia than areas with better environmental Height water limitations region, but genetic code be an important factor how will cope drought.