The need to understand the carbon sequestration ability of trees under current and future climatic scenarios is fundamental predict role forest in counterbalancing global warming. In this study, we investigated Pinus sylvestris L. a setting pure mixed forests with Quercus petraea (Matt.) Liebl. Central Poland. Beside traditional growth measures, i.e., Ring Width, Basal Area Increment, wood dens...

More than 200 000 ring-width measurements from 384 trees were obtained for 20 individual sites ranging from the lower to upper local timber-lines in the Northwest Karakorum of Pakistan and the Southern Tien Shan of Kirghizia. Samples were obtained predominantly from juniper species (Juniperus) and were analysed to reconstruct regional climatic variation patterns in Western Central Asia since ad...

Tree-ring data can extend back in time for thousands of years allowing researchers to reconstruct certain environmental factors that have left an imprint or signal in the tree-ring record. Typically, these factors include reconstructions of annual precipitation or temperature for months or seasons to which a particular tree species is sensitive. Over the last several decades, scientists have us...

Natural disturbances have been among the most important driving factors in many ecosystems. Anthropogenic suppression of various disturbances has led to documented changes in ecosystem structure and function. Avalanche disturbances are one of the most important processes in many subalpine ecosystems world-wide and avalanche tracks provide unique habitat for various animal and plant species. Ove...

Abstract Poplar is raw material for various panel, paper and fiber products. The 12 sample trees of clone Nanlin-895 from four spacings were destructively harvested after thirteen growing seasons to assess the influence spacing on radial growth wood properties. Spacing significantly affected tree-ring width basic density ( p < 0.05) but not traits. highest diameter at breast height (1.3 m) w...

In the present study, following features were investigated: variability of selected macrostructure (width annual growth ring and share latewood) wood density European spruce (Picea abies (L.) Karst.) in a cross-section trunk. The study was conducted locations northeastern range (12 research plots) southwestern (20 Poland. On testing plots, Pressler drill borehole samples taken from 15 trees. Th...

There have been great advances in the field of dendroclimatological research during the past decades. Tree-ring data have been used to derive various climate variables for certain localities and for larger regions. Characteristics of tree-rings provide measurements which can be used as records of climate variability prior to any instrumental weather observations. This is how dendroclimatology c...

Introduction Conclusions References

In this paper, self-stabilizing asynchronous distributed algorithms are given for the -out-ofexclusion problem, a generalization of the mutual exclusion problem, in which there are units of a resource, and any process can request up to units. We consider two network topologies, a tree and a unidirectional ring. The networks are anonymous except for one distinguished process. The ring algorithm ...