Next Article in Journal
Tree-Ring-Recorded Drought Variability in the Northern Daxing’anling Mountains of Northeastern China
Previous Article in Journal
Inter- and Intraspecific Patterns in Resprouting of Trees in Undisturbed Natural Forests along an Elevational Gradient in Central Japan
Previous Article in Special Issue
Comparison and Combination of Mobile and Terrestrial Laser Scanning for Natural Forest Inventories
Article Menu
Issue 11 (November) cover image

Export Article

Open AccessArticle
Forests 2018, 9(11), 673; https://doi.org/10.3390/f9110673

Analyzing the Vertical Distribution of Crown Material in Mixed Stand Composed of Two Temperate Tree Species

1
AMAP, IRD, CNRS, CIRAD, INRA, Univ Montpellier, botAnique et Modélisation de l’Architecture des Plantes et des Végétations TA A51/PS2, CEDEX 05, 34398 Montpellier, France
2
Chaire de recherche sur la forêt habitée, Département de Biologie, Chimie et Géographie, Université du Québec à Rimouski (UQAR), 300 allée des Ursulines, Rimouski, QC G5L 3A1, Canada
3
Department of Applied Geomatics, Centre d’Applications et de Recherches en Télédétection, Université de Sherbrooke, 2500 boul. de l’université, Sherbrooke, QC J1K 2R1, Canada
*
Author to whom correspondence should be addressed.
Adapted from a Doctor’s Thesis, Department of biology, chemistry and geography, University of Quebec, Rimouski, QC G5L3A1, Canada.
Received: 28 August 2018 / Revised: 24 October 2018 / Accepted: 26 October 2018 / Published: 26 October 2018
(This article belongs to the Special Issue Terrestrial and Mobile Laser Scanning in Forestry)
  |  
PDF [4777 KB, uploaded 29 October 2018]
  |  

Abstract

The material distribution inside tree crowns is difficult to quantify even though it is an important variable in forest management and ecology. The vertical distribution of a relative density index (i.e., vertical profile) of the total, woody, and leafy material at the crown scale were estimated from terrestrial laser scanner (TLS) data on two species, sugar maple (Acer saccharum Marsh.) and balsam fir (Abies Balsamea Mill.). An algorithm based on a geometrical approach readily available in the Computree open source platform was used. Beta distributions were then fitted to the vertical profiles and compared to each other. Total and leafy profiles had similar shapes, while woody profiles were different. Thus, the total vertical distribution could be a good proxy for the leaf distribution in the crown. Sugar maple and balsam fir had top heavy and bottom heavy distributions respectively, which can be explained by their respective architectural development. Moreover, the foliage distribution of sugar maples shifted towards the crown base when it was found in mixed stands, when compared to pure stands. The opposite behavior was observed for balsam firs, but less pronounced. According to the shape of the foliage distribution, sugar maple takes advantages from mixture contrarily to balsam fir. From a methodological point of view, we proposed an original approach to separate wood from leaf returns in TLS data while taking into account occlusion. Wood and leaf separation and occlusion problems are two challenging issues for most TLS-based studies in forest ecology. View Full-Text
Keywords: terrestrial laser scanner (TLS); vertical profile; mixed stands; L-vox; wood leaf separation; tree architecture terrestrial laser scanner (TLS); vertical profile; mixed stands; L-vox; wood leaf separation; tree architecture
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Martin-Ducup, O.; Schneider, R.; Fournier, R.A. Analyzing the Vertical Distribution of Crown Material in Mixed Stand Composed of Two Temperate Tree Species. Forests 2018, 9, 673.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Forests EISSN 1999-4907 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top