DBPapers
DOI: 10.5593/SGEM2015/B32/S14.061

DENSITIES OF LARGE TREES IN NATURAL FORESTS - A KEY STRUCTURAL CHARACTERISTIC. CASE STUDY FROM IZVOARELE NEREI NATURE RESERVE, SW ROMANIA

D. O. Turcu, O. Merce, R. Tomescu, Q. Ponette
Thursday 24 September 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-37-7 / ISSN 1314-2704, June 18-24, 2015, Book3 Vol. 2, 455-462 pp

ABSTRACT
The forests with high degree of naturality represent archetypes of structure and functioning of the forest ecosystems. The “Izvoarele Nerei” Nature Reserve, located in South-Western Romania, is one of the largest natural forest massifs from Europe – approx. 5000 ha – consisting of pure beech (Fagus sylvatica L.) forests. A network of 12 sample plots of 1 ha each was set up on 4 altitudinal levels: 800, 1000, 1200 and 1350 m, respectively 3 plots / altitudinal level. Structural characteristics were measured and described within these plots. An average of 3 trees/ha of over 100 cm in DBH, 20 trees/ha of over 80 cm and 59 trees/ha of over 60 cm was found. For the standing dead trees, the average values were 0.5 trees/ha, 3 trees/ha and 6 trees/ha, respectively. Most of the large trees, over 100 cm in DBH, were concentrated in the area located at 800-1000 m altitude, where local densities of 7-11 trees/ha were found, while in the area close to the tree line showed 0-1 such large trees. Considering all trees over 60 cm in DBH, the situation is similar – there is a maximum (70-77 trees/ha) at 800-1000 m altitude and quite small densities of such trees at 1350 m altitude. It was observed that these outstanding trees, excelling by DBH or by total height, have often both these dimensions exceptional. It was concluded that large tree densities represent a key structural characteristic for the natural forests.

Keywords: natural forests, structural characteristics, large trees

PAPER DOI:10.5593/SGEM2015/B32/S14.061, Title: DENSITIES OF LARGE TREES IN NATURAL FORESTS - A KEY STRUCTURAL CHARACTERISTIC. CASE STUDY FROM IZVOARELE NEREI NATURE RESERVE, SW ROMANIA

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