The vertical distribution of the cross-sectional area increment lower trunk in aged Sugi (Cryptomeria japonica) trees was analyzed using annual ring data from disks. We collected three approximately 90-year-old mature plantations under different density management and old-growth stands 160 years or more. Of nine sample thinning experiment plots, only had significantly higher increments at a rel...

To assess how the effects of drought could be better captured in process-based models, this study simulated and contrasted two water uptake approaches in Scots pine and Scots pine-Sessile oak stands. The first approach consisted of an empirical function for root water uptake (WU1). The second approach was based on differences of soil water potential along a soil-plant-atmosphere continuum (WU2)...

Given an edge-weighted undirected graph G = (V,E, c, w), where each edge e ∈ E has a cost c(e) and a weight w(e), a set S ⊆ V of terminals and a positive constant D0, we seek a minimum cost Steiner tree where all terminals appear as leaves and its diameter is bounded by D0. Note that the diameter of a tree represents the maximum weight of path connecting two different leaves in the tree. Such p...

A set of compatible models are established to simulate the profile and internal structure of stems: ring distribution, bark and sapwood profiles. First, models are built tree by tree; they are then generalized by establishing relationships between the estimates of treewise model parameters and the individual tree characteristics. The residuals are examined against the relative height or distanc...

Understanding how tropical tree species differ in their growth strategies is critical to predict forest dynamics and assess species coexistence. Although tree growth is highly variable in tropical forests, species maximum growth is often considered as a major axis synthesizing species strategies, with fast-growing pioneer and slow-growing shade tolerant species as emblematic representatives. We...

knowing and conducting studies on size characters of trees is essential for assessing the tree volumeand/or other statistical parameters and also forest management. the characteristics of 529 treesincluding diameter at breast height (dbh) and total height were measured in an even-aged fraxinusstand for two periods from 2005 to 2012 in chelir district, a part of experimental kheyrud forest.resul...

This paper analyses the cumulative effects of selective thinning and from below on diameter basal area increments target trees after 25/26 years in 52, 69- 86-year-old silver lime (Tilia tomentosa Moench) stands. Two tree collectives were analysed: (1) elite selected between 1993–1994 permanent sampling plots (selective method), (2) a ‘comparable collective’ 2019 (25/26 later) according to same...