ABSTRACT This paper reports and discusses the distribution of pine mistletoe in Scots pine forests at stand and tree level in relation to some site, stand, and tree characteristics. Population characteristics (age, number and biomass) and distribution of pine mistletoe in the canopy of Scots pine trees were also evaluated. A total of 1408 trees were measured in 114 representative sample plots in the Eastern Black Sea Region of Turkey. Of the measured trees, 648 (46%) were mistletoe infected and 760 (54%) were uninfected. The 6-class dwarf mistletoe rating system (DMRS) was used for infection severity rating. Correlation analysis results indicated significant relationships between mistletoe infection severity and stand and tree characteristics. The t-test results showed that there was a significant difference between mean stand and tree characteristics in mistletoe infected and uninfected stands. The results of the binary logistic regression analysis indicated that altitude and stand volume were the most significant predictor of the distribution of pine mistletoe at stand level. As for the population characteristics of pine mistletoe, the results indicated that the life span of pine mistletoe was about 24 years and that biomass distribution gradually increased from lower to upper part of the crowns.

中文翻译：

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松树槲寄生 (Viscum album ssp. austriacum) 在苏格兰松 (Pinus sylvestris) 森林中的分布：从林分到树级

摘要 本文报告并讨论了与某些地点、林分和树木特征相关的苏格兰松树林中松树槲寄生在林分和林木水平上的分布。还评估了苏格兰松树冠层中松树槲寄生的种群特征（年龄、数量和生物量）和分布。在土耳其东部黑海地区的 114 个代表性样地中，总共测量了 1408 棵树。在测量的树木中，648 棵（46%）被槲寄生感染，760 棵（54%）未被感染。6 级矮槲寄生分级系统 (DMRS) 用于感染严重程度分级。相关分析结果表明槲寄生感染严重程度与林分和树木特征之间存在显着关系。t 检验结果表明，槲寄生感染和未感染林分的平均林分和树木特征之间存在显着差异。二元逻辑回归分析结果表明，海拔和林分体积是松树槲寄生在林分水平分布的最显着预测因子。松树槲寄生的种群特征表明，松树槲寄生的寿命约为24年，生物量分布从树冠下部到上部逐渐增加。