Characterization of the spatial structure of the canopy in Pinus sylvestris L. stands from hemispherical photographs

Montes Pita, Fernando; Rubio Sánchez, Agustín; Barbeito Sánchez, Ignacio y Cañellas, Isabel (2008). Characterization of the spatial structure of the canopy in Pinus sylvestris L. stands from hemispherical photographs. "Forest Ecology and Management", v. 255 (n. 3-4); pp. 580-590. ISSN 0378-1127. https://doi.org/10.1016/j.foreco.2007.09.070.

Descripción

Título: Characterization of the spatial structure of the canopy in Pinus sylvestris L. stands from hemispherical photographs
Autor/es:
  • Montes Pita, Fernando
  • Rubio Sánchez, Agustín
  • Barbeito Sánchez, Ignacio
  • Cañellas, Isabel
Tipo de Documento: Artículo
Título de Revista/Publicación: Forest Ecology and Management
Fecha: Marzo 2008
Volumen: 255
Materias:
Palabras Clave Informales: Ripley L(d) function; Hemispherical photograph; Spatial pattern; Gap fraction; Clumping; Angular semivariance.
Escuela: E.T.S.I. Montes (UPM) [antigua denominación]
Departamento: Silvopascicultura [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

The spatial pattern was characterized in five experimental plots of 0.5 ha established in Scots pine stands located in the Central Mountain Range of Spain with different ecological conditions and in which different silvicultural practises are employed. A new method is proposed to asses the spatial pattern from hemispherical photographs, based on the variance between the gap fractions in sky sectors, which was calculated as a function of the angular distance. The results were compared with the spatial pattern analysis based on the second moment measure, and with the analysis of the structure of the tree number semivariogram. The three methods give a very similar scale of the pattern for most of the plots. The mature plot with more intensive silviculture showed a regular pattern at scales below 6 m. The mature plot in which the silviculture was less intensive showed a cluster pattern at scales around 10 m, and clustering at similar scales was detected during regeneration. Cluster patterns at scales around 5 m were found at the upper limit of the altitudinal range of Scots pine as well as at the lower limit, where Pyrenean oak stands merge with the pinewood. The method proposed allows the scale of the pattern of the canopy to be determined from hemispherical photographs, and can be easily implemented in forest inventories.

Más información

ID de Registro: 2932
Identificador DC: http://oa.upm.es/2932/
Identificador OAI: oai:oa.upm.es:2932
Identificador DOI: 10.1016/j.foreco.2007.09.070
URL Oficial: http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6T6X-4R2GRY7-1-H&_cdi=5042&_user=885385&_pii=S0378112707006950&_orig=browse&_coverDate=03/20/2008&_sk=997449996&view=c&wchp=dGLzVtb-zSkWA&md5=952a264263a802c84df47ff08833b043&ie=/sdarticle.pdf
Depositado por: Memoria Investigacion
Depositado el: 13 May 2010 10:03
Ultima Modificación: 20 Abr 2016 12:33
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