BIODIVERSITY OF WOODEN SPECIES IN RANGER DISTRIC OF TÎRGU LĂPUȘ

Abstract

Ranger Distric of Tîrgu Lăpuş is a part of Maramureş Foresty Directorate within the National Foresty Directorate - Romsilva. The forest area of 11327,57 ha administrated by Tîrgu Lăpuş includes the state-owned forests located in the North of the country, the middle basin of the Lăpuş River, the Cavnic River Basin and the Someş River Basin. Out of the 6 production units, P. U. I-Valea Mare in terms of composition diversity, age and average wood / hectare volume of wood species since 1967 until now. In 1967 the area of Production Unit I Valea Mare was 4790.0 ha. Becouse of various modifications over the years, in 2009, the area was of 4148.6 ha. These changes are visible in terms of habitat, biodiversity and administration. The types of forest resorts and forest types, including the variety of treatments applied, have been studied in detail in order to perceive the way of life, growth and adaptation to current pedological conditions and climate change, but especially to quantify and explain the dynamics of the wood species in this area. In conclusion, in P. U. I Valea Mare is notable for the constancy of species (beech, hornbeam and spruce), the increase and / or decrease of the share of the others (oak, resinous) and the disappearance of a species (pine). There are also some species that are found throughout this constant time frame under the share of 5% (resinous).