Climate Response in Tree-Rings of Sawara Cypress [Chamaecyparis pisifera (Siebold & Zucc.) Endl.] in Poland

Sawara cypress [Chamaecyparis pisifera (Siebold & Zucc.) Endl.] is originally from Japan. It was introduced to Europe in the latter half of 19th century (in England and Holland 1861, Poland 1864). The aim this study examine influence climatic conditions on tree-ring width among populations growing Poland. Additionally, other indicators determining growth-climate relationship for studied tree species were investigated such as false rings, missing or frost rings. Five stands northwestern central selected study. Samples taken 97 trees, using Pressler borers at breast-height. Tree-ring widths measured down 0.01 mm. Climatic data came weather stations located nearest plots. varies (from 1.94 4.47 mm). oldest cypresses grow Glinna Arboretum are nearly 130 years old. youngest ones Rogów (67 old) Wirty (58 old). Ten regional pointer years, including six negative four positive ones, determined local chronologies. Negative associated with occurrence cold winters water shortages summer. Positive mostly periods a warm winter season, early spring, high precipitation totals during summer months. Correlation response function analysis corroborates results yielded by year analysis. False rings carry an additional information pluvial period, aid dating dendrochronological series indicate both very persistent ground occurrences spring period. In comparison native conifers, can be regarded fast-growing species. knowledge acclimatization, growth rate, may useful, especially time rapidly changing climate, increasing human impact, highly intensified invasion insect fungal attacking forest-forming taxa.