Evaluation of Tree Vitality in Old Trees and Wildfire-Damaged Stands Using Cambial Electrical Resistance

초록

In this study, we evaluated the cambial electrical resistance (CER)-based physiological vitality of old and surviving trees in wildfire-damaged stands in Gyeongsangnam-do and Busan, South Korea. In total, 135 trees were surveyed and classified as protected old trees, trees at tourist sites, and wildfire-damaged trees. Vitality indices were measured using a JunsMeter and analyzed according to species and site conditions. Old trees in rural areas (Miryang and Changnyeong) showed significantly higher physiological vitality than those in urban areas (Busan). Pinus densiflora in Busan had the lowest vitality index (mean: 74.6), statistically falling in the lowest group. This indicates that conifers are more vulnerable to urban environmental stress than broad-leaved species. Trees exposed to severe soil compaction at tourist sites, such as those at Yeongnamnu Pavilion, showed significantly lower physiological vitality, highlighting the negative impact of anthropogenic disturbance. In wildfire-damaged stands, broad-leaved species such as Quercus acutissima maintained relatively high physiological vitality (Group A) because of their superior resprouting ability. Meanwhile, P. densiflora showed significantly lower vitality (Group B) and a slower recovery. Correlation analysis indicated that trees in similar stressful environments, such as urban centers and tourist sites, had synchronized vitality patterns. These findings suggest that site conditions and soil environment are more critical factors for CER-based physiological vitality than chronological age. Therefore, integrated management that focuses on soil improvement and the selection of fire-tolerant broad-leaved species for restoration is recommended

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