To develop recommendations for tree selection in Continuous Cover Forestry (CCF), access to valid tools simulating growth at individual tree-level is necessary. assist efforts such tools, this study, long-term observation data from two uneven-sized Norway spruce plots southern Sweden are used evaluate old and new individual-tree models (two established Swedish models, preliminary included as a ...

To enhance the performance of overlay multicast networks, the overlay multicast tree should be optimized. This optimization problem is a minimum diameter, degree-limited spanning tree (MDDLST) problem which is known to be NP-Hard. We present a new scheme to optimize an overlay multicast tree dynamically. Our algorithm can adapt the tree structure to the dynamic membership and network situation....

Tropical forests are experiencing structural changes that may reduce carbon storage potential. The recent increase in liana abundance and biomass is one such potential change. Lianas account for approximately 25 per cent of woody stems and may have a strong impact on tree dynamics because severe liana infestation reduces tree growth and increases tree mortality. Based on forest inventory data f...

Hurricane Gilbert struck the northeastern portion of the Yucatan Peninsula in an area where we have been conducting studies of the vegetation and avifauna in a dry tropical forest since 1984. All trees in our study area were completely defoliated and most suffered heavy structural damage. Although few trees were killed outright, many died over the next 17 months, especially those that had been ...

pistacia atlantica is the most important tree species for the economy of many rural areas in west of iran, but no effort has been made for the genetic improvement of this species. the aim of this investigation was to study the genetic variation and inheritance of early growth traits in p. atlantica. for this purpose, three wild pistachio populations comprising 60 randomly selected adult trees f...

sanitary landfills, created for the disposal of solid waste, usually are developed into parks afterthey are closed. however, soil amelioration with organic matter is usually needed to restore fertility andpromote revegetation. sewage sludge creates a massive waste disposal problem. the use of composted sewage sludge (biosolid) as a soil conditioner might restore the soil fertility at landfill s...

The world's forests play a pivotal role in the mitigation of global climate change. By photosynthesis they remove CO2 from the atmosphere and store carbon in their biomass. While old trees are generally acknowledged for a long carbon residence time, there is no consensus on their contribution to carbon accumulation due to a lack of long-term individual tree data. Tree ring analyses, which use a...

We quantified structural attributes in three alluvial flat old-growth coast redwood stands. Tree size parameters and occurrences of distinctive features (e.g., burls, goose pens) were similar between stands. Occurrence of distinctive features was greater among larger trees. Tree sizefrequency distributions conformed to a reverse-J diameter distribution. The range of tree sizes was similar betwe...