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Managed and unmanaged silver fir-beech forests show similar structural features in the western Pyrenees

Vlatka Horvat   , Jorge García De Vicuña, Idoia Biurrun, Itziar García-Mijangos

iForest - Biogeosciences and Forestry, Volume 11, Issue 5, Pages 698-704 (2018)
doi: https://doi.org/10.3832/ifor2720-011
Published: Oct 23, 2018 - Copyright © 2018 SISEF

Research Articles


Forest structure is considered one of the basic features of the forest ecosystem and it is widely studied with the aim of developing sustainable management strategies. The usual approach is to compare structural features of stands in managed and unmanaged forests. Managed stands are those disturbed in some way by silvicultural practices, whereas unmanaged stands are subject to natural disturbance dynamics and may serve as a reference. Up to now, there has been insufficient research into sustainable management strategies for Pyrenean silver fir-beech forests and the structure of managed and unmanaged stands has not yet been evaluated. The aim of this study is to provide a detailed characterisation of the structural attributes of these mixed mountain forests in the western Pyrenees and compare managed and unmanaged stands regarding selected stand parameters. Potential differences between managed and unmanaged stands were assessed with Mann-Whitney U-tests. Diameter distribution was modelled using third-order polynomials and non-linear regression was performed to compare the tree heights in managed and unmanaged stands. Stand structure was similar in both management categories. The diameter distribution of Pyrenean unmanaged silver fir-beech stands showed a tendency towards a rotated sigmoid distribution. Our results indicate that the recommended diameter distribution has been preserved in managed stands despite they were intensively managed in the past, whilst the unmanaged stands are still in the process of developing old-growth attributes because management was abandoned too recently for significant changes in forest structure to have occurred.

  Keywords


Forest Management, Gaps, Pyrenees, Stand Structure

Authors’ address

(1)
Vlatka Horvat
Jorge García De Vicuña
Idoia Biurrun
Itziar García-Mijangos
Dept. Plant Biology and Ecology, University of the Basque Country UPV/EHU, P. O. Box 644, Bilbao (Spain)

Corresponding author

 
Vlatka Horvat
vlatkahorvat0@gmail.com

Citation

Horvat V, García De Vicuña J, Biurrun I, García-Mijangos I (2018). Managed and unmanaged silver fir-beech forests show similar structural features in the western Pyrenees. iForest 11: 698-704. - doi: 10.3832/ifor2720-011

Academic Editor

Gianluca Piovesan

Paper history

Received: Jan 03, 2018
Accepted: Jul 26, 2018

First online: Oct 23, 2018
Publication Date: Oct 31, 2018
Publication Time: 2.97 months

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