BoivinPaquetteRacineEtAl2011

Reference

Boivin, F., Paquette, A., Racine, P., Messier, C. (2011) A fast and reliable method for the delineation of tree crown outlines for the computation of crown openness values and other crown parameters. Canadian Journal of Forest Research, 41(9):1827-1835. (Scopus )

Abstract

Numerous crown parameters (e.g., leaf area index, diameter, height, volume) can be obtained via the analysis of tree crown photographs. In all cases, parameter values are functions of the position of the crown outline. However, no standardized method to delineate crowns exists. To explore the effect of different outlines on tree crown descriptors, in this case crown openness (CO), and facilitate the adoption of a standard method free of user bias, we developed the program Crown Delineator that automatically delineates any outline around tree crowns following predetermined sensibility settings. We used different outlines to analyze tree CO in contrasting settings: using saplings from four species in young boreal mixed wood forests and medium-sized hybrid poplar trees from a low-density plantation. In both cases, the estimated CO increases when calculated from a looser outline, which had a strong influence on under story available light simulations using a forest simulator. These results demonstrate that the method used to trace crown outlines is an important step in the determination of CO values. We provide a much-needed computer-assisted solution to help standardize this procedure, which can also be used in many other situations in which the delineation of tree crowns is needed (e.g., competition and crown shyness).

EndNote Format

You can import this reference in EndNote.

BibTeX-CSV Format

You can import this reference in BibTeX-CSV format.

BibTeX Format

You can copy the BibTeX entry of this reference below, orimport it directly in a software like JabRef .

@ARTICLE { BoivinPaquetteRacineEtAl2011,
    AUTHOR = { Boivin, F. and Paquette, A. and Racine, P. and Messier, C. },
    TITLE = { A fast and reliable method for the delineation of tree crown outlines for the computation of crown openness values and other crown parameters },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 2011 },
    VOLUME = { 41 },
    PAGES = { 1827-1835 },
    NUMBER = { 9 },
    ABSTRACT = { Numerous crown parameters (e.g., leaf area index, diameter, height, volume) can be obtained via the analysis of tree crown photographs. In all cases, parameter values are functions of the position of the crown outline. However, no standardized method to delineate crowns exists. To explore the effect of different outlines on tree crown descriptors, in this case crown openness (CO), and facilitate the adoption of a standard method free of user bias, we developed the program Crown Delineator that automatically delineates any outline around tree crowns following predetermined sensibility settings. We used different outlines to analyze tree CO in contrasting settings: using saplings from four species in young boreal mixed wood forests and medium-sized hybrid poplar trees from a low-density plantation. In both cases, the estimated CO increases when calculated from a looser outline, which had a strong influence on under story available light simulations using a forest simulator. These results demonstrate that the method used to trace crown outlines is an important step in the determination of CO values. We provide a much-needed computer-assisted solution to help standardize this procedure, which can also be used in many other situations in which the delineation of tree crowns is needed (e.g., competition and crown shyness). },
    COMMENT = { Export Date: 26 September 2011 Source: Scopus CODEN: CJFRA doi: 10.1139/x11-107 },
    ISSN = { 00455067 (ISSN) },
    OWNER = { Luc },
    TIMESTAMP = { 2011.09.26 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-80052192813&partnerID=40&md5=d43ad0c5ec0c6c3b0597fa23f8222931 },
}

********************************************************** *************************** FRQNT ************************ **********************************************************

Le CEF est un
regroupement stratégique du

********************************************************** *********************** Infolettre *********************** **********************************************************

Abonnez-vous à
l'Infolettre du CEF!

********************************************************** ***************** Pub - Colloque du CEF ****************** **********************************************************

********************************************************** ************* Écoles d'été et formation **************************** **********************************************************

Formations et Écoles d'été

********************************************************** ***************** Pub - Congrès Mycelium ****************** **********************************************************

Septembre 2021

********************************************************** ***************** Pub - IWTT ****************** **********************************************************

Reporté en 2021

**********************************************************

***************** Pub - Symphonies_Boreales ****************** **********************************************************

********************************************************** ***************** Boîte à trucs *************** **********************************************************

CEF-Référence
La référence vedette !

  • Voici une liste (clairement incomplète) des packages R axés sur l'écologie! N'hésitez pas à ajouter à la liste

Voir les autres...