Spatial Structure of Scenic Forest of Abies faxoniana in Western Sichuan

WANG Li; CAI Xiao-hu; WANG Yu; XIE Da-jun; LI Hong-xia; MIN An-min; HE Jian-she; YANG Chang-xu

Combining traditional stand structure indexes with 4 spatial structure parameters (mingling, angle index, neighborhood comparison and opening degree), the spatial structure of Abies faxoniana scenic forest in western Sichuan was studied. The results indicated that the species diversity of A. faxoniana scenic forest was simple. There were 7 tree species in tree layers, and the vertical structure of stand could be divided into 3 layers. The average mingling of the stand was 0.46, showing that the mixed degree of the forest is in middle intensity, and the middle mixed degree was 61% of the stand. The angle index was 0.483, indicating that the tree position in this stand was randomly distributed. The neighborhood comparison was 0.286, and there were nearly 30% trees in the stand being dominant. The average opening degree was 0.309, displaying the growth space of most trees in the forest was sufficient. A. faxoniana population is dominant now, and the community is in a relatively stable state. But because of the number of other 5 tree species is few, and the DBH structure of community was not continuous, the natural regeneration is difficult, and after a certain time of evolution ,they may disappear. So it is urgent to take practical protection measures to ensure the tree's growth in order to maintain the species diversity and community stability.

1. Sichuan Academy of Forestry, Chengdu 610066, Sichuan, China

Received Date: 2012-07-04

Abstract: Combining traditional stand structure indexes with 4 spatial structure parameters (mingling, angle index, neighborhood comparison and opening degree), the spatial structure of Abies faxoniana scenic forest in western Sichuan was studied. The results indicated that the species diversity of A. faxoniana scenic forest was simple. There were 7 tree species in tree layers, and the vertical structure of stand could be divided into 3 layers. The average mingling of the stand was 0.46, showing that the mixed degree of the forest is in middle intensity, and the middle mixed degree was 61% of the stand. The angle index was 0.483, indicating that the tree position in this stand was randomly distributed. The neighborhood comparison was 0.286, and there were nearly 30% trees in the stand being dominant. The average opening degree was 0.309, displaying the growth space of most trees in the forest was sufficient. A. faxoniana population is dominant now, and the community is in a relatively stable state. But because of the number of other 5 tree species is few, and the DBH structure of community was not continuous, the natural regeneration is difficult, and after a certain time of evolution ,they may disappear. So it is urgent to take practical protection measures to ensure the tree's growth in order to maintain the species diversity and community stability.

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Reference (18)

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Spatial Structure of Scenic Forest of Abies faxoniana in Western Sichuan

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