Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Characterization of the spatial structure of the canopy in Pinus sylvestris L. stands from hemispherical photographs
Year:2008
Research Areas
  • Ecology,
  • Agriculture,
  • Crop production
Information
Abstract
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.
International
Si
JCR
Si
Title
FOREST ECOLOGY AND MANAGEMENT
ISBN
0378-1127
Impact factor JCR
1,579
Impact info
Volume
http://dx.doi.org/10.1016/j.foreco.2007.09.070
Journal number
255
From page
580
To page
590
Month
OCTUBRE
Ranking
Participants
  • Participante: I. CAÑELLAS
  • Autor: Agustin Rubio Sanchez (UPM)
  • Participante: I. BARBEITO
  • Autor: Fernando Montes Pita (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Ecología y Paisaje
  • Departamento: Silvopascicultura
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