Journal of Environmental Biology

A dendroecological study on Pinus nigra Arn. at different altitudes of  northern slopes of Kazdaglari, Turkey

Orhan Sevgi*¹ and  Unal Akkemik²

¹Istanbul University, Faculty of Forestry, Department of Soil Science and Ecology, TR-34473 Bahçeköy-Istanbul, Turkey

²Istanbul University, Faculty of Forestry, Department of Forest Botany, TR-34473, Bahçeköy-Istanbul, Turkey

(Received: January 1, 2006 ; Revised received: August 20, 2006 ; Accepted: September 14, 2006)

Abstract: This study was carried out to investigate the relationship between tree ring widths of Pinus nigra in Kazdaglari having humid and very humid climatic conditions. Sixty two trees were cut from 24 sampled points from different altitudes in Kazdaglari to measure treering widths. To determine the responses to the climate, correlation coefficients between treering widths and climatic data were calculated during biological years from October of the previous year to September of the current year. In lower altitudes, where climate type is humid, spring and summer precipitation affect the growth of tree rings, but they are not statistically limiting factors. In higher altitudes, this effect is weaker. As a result, we can conclude that the negative effects of the drought are still not clear on the Pinus nigra trees under humid and very humid climatic conditions and at the northern slopes in submediterranean mountainous regions in Turkey.

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