Estimarea volumul arborilor extrasi prin cazanire: un studiu de caz bazat pe monitorizare anuala

This paper aims to estimate the volume of the harvested wood in two\udbeech stands from North-Eastern Romania. We have installed in 2008 two sample\udplots of 0.25 hectares each. For each tree, we have recorded the azimuth, the distance\udto the center and the dendrometric characteristics. Each following year, in\udMarch, all the trees of the two plots were inventoried. Thus allow us to identify\udthe harvested trees, with two situations: stump found or whole harvested tree.\udWe have assumed that all harvested trees with remaining stump were cut legally,\udand we have considered the whole-tree harvesting (with stump removal) as being\udillegal logging. In the first plot the initial stand volume in 2008 was 459.22 m3\udha-1, while in 2016 the volume was 457.24 m3\ud ha-1. After 8 years monitoring, we\udhave recorded a volume harvested legally of 43.51 m3\ud ha-1 (stump existing in the\udplot) and a volume illegally harvested of 47.16 m3\ud ha-1 (the trees, including their\udstump, have disappeared from the plot). In the second plot, the initial volume in\ud2008 was 461.71 m3\ud ha-1, and in 2016 the volume was 479.34 m3\ud ha-1. In this plot,\udthe volume harvested legally was 52.99 m3\ud ha-1 and the volume harvested illegally\ud(disappeared trees) was 5.92 m3\ud ha-1. In the first studied plot, 18 trees were\udlegally harvested, and 23 illegally harvested. In the second plot, 14 tress were\udlegally harvested, while 3 trees were illegally harvested. The average diameter of\udtrees harvested illegally is 18.67 cm and the average volume per tree is 0,5 m3\ud.\udIn average for the two plots, and for the period studied (2008-2016) the volume\udharvested by illegal whole-tree removal represents half of the legal harvesting. If\udextrapolating the minimum recorded volume of illegal whole tree removals only\udto young forest (3,700,000 ha - according IFN - roifn.ro) and to only one third\udof them considered to be easily accessible to the local population, the volume of\udillegal whole-tree harvesting may reach almost 1,000,000 m3\ud year-1. Our results\udargue that the volume of the illegal whole-tree harvesting is largely underestimated,\udthat the easier accessible stands are the most likely to be affected by the illegal\udwhole-tree harvesting and that the local firewood needs are driving this form of\udillegal loggin