Tree ring pattern of roots exhumed by soil erosion

Kázmér, Miklós and Kern, Zoltán and Fang, Keyan and Zhou, Yun-chao (2014) Tree ring pattern of roots exhumed by soil erosion. Hantkeniana, 9. pp. 133-167. ISSN 1219-3933

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Abstract

Mountains are subject to uplift and erosion. Human interference with the landscape by intensive agriculture, construction works, and tourism contributes to the removal of soil. We measured erosion rate by root exposure dating. Results of a pilot study of Shen Men Mt. at Tianshui and Kong Tong Mt. at Pingliang, Gansu province of China are reported here. New exhumation markers are introduced, separating aboveground features from mechanical stress-induced features. Change from root texture to stem texture, as defined by ring width and latewood width changes, reaction wood, distorted symmetry, simple and repeated wounds, open and closed wounds, abraded wound, onlap and offlap pattern of wound-affected growth increments, and simple and multiple discolouration by phenolic staining are illustrated and described here.

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