Catal Yilmaz, Carus Serdar
Faculty of Forestry, Department of Forest Management Planning, Suleyman Demirel University -32260, Turkey.
J Environ Biol. 2011 May;32(3):263-70.
In this study, the influence of infection by pine mistletoe (Viscum album L. subsp. austriacum (Wiesb.) Volmann) on the radial growth of crimean pine (Pinus nigra Amold) in Turkey was investigated. We built local residual tree-ring-width chronologies using dendrochronogical techniques. Tree ring chronologies of uninfected (control) crimean pine were used to estimate potential radial growth characteristics in the "infected" crimean pine (light, moderate and severe infection groups). In 2005, increment cores were collected from 26 infected and 19 control dominant or co-dominant trees and annual radial growth indices from 1930-2005 were calculated for each infection group in a 14 point sampling. We compared radial growth in the uninfected trees with mean regional chronology. We found a strong decrease in radial growth in during the 1998-2005 period. The periodic average radial growth reduction (in %) from 1998 to 2005, respectively, were 0 for control, 26 for light, 39 for moderate and 63 for severe infection groups. It can be especially concluded that a severe degree of pine mistletoe attack has a negative effect on radial growth of the infected crimean pine trees.
在本研究中，调查了松槲寄生（Viscum album L. subsp. austriacum (Wiesb.) Volmann）感染对土耳其克里米亚松（Pinus nigra Amold）径向生长的影响。我们使用树木年代学技术建立了当地的残差树轮宽度年表。未感染（对照）克里米亚松的树轮年表用于估计“感染”克里米亚松（轻度、中度和重度感染组）的潜在径向生长特征。2005年，从26棵感染树和19棵对照优势树或共优势树上采集了增量芯，并在14点采样中为每个感染组计算了1930 - 2005年的年径向生长指数。我们将未感染树的径向生长与区域平均年表进行了比较。我们发现1998 - 2005年期间径向生长大幅下降。1998年至2005年期间，对照、轻度、中度和重度感染组的周期性平均径向生长减少率（%）分别为0、26、39和63。尤其可以得出结论，严重程度的松槲寄生侵袭对受感染的克里米亚松树的径向生长有负面影响。
