Quantitative relationships with competition of dominant tree populations in an evergreen broad-leaved forest on Mount Tianmu

JIANG Ting; TANG Meng-ping

Volume 25 Issue 4

Aug. 2008

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JIANG Ting, TANG Meng-ping. Quantitative relationships with competition of dominant tree populations in an evergreen broad-leaved forest on Mount Tianmu[J]. Journal of Zhejiang A&F University, 2008, 25(4): 444-450.

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JIANG Ting, TANG Meng-ping. Quantitative relationships with competition of dominant tree populations in an evergreen broad-leaved forest on Mount Tianmu[J]. Journal of Zhejiang A&F University, 2008, 25(4): 444-450.

Quantitative relationships with competition of dominant tree populations in an evergreen broad-leaved forest on Mount Tianmu

JIANG Ting^1,2,
TANG Meng-ping^2
,

1.
Agricultural Economic Bureau of South Lake Region，Jiaxing 314051，Zhejiang，China;
2.
School of Environmental Sciences and Technology，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China

More Information

Corresponding author: TANG Meng-ping
Publish Date: 2008-08-20

Abstract

Adjacent grid points were used to obtain data for an analysis of dominant degree. Then，with a plot size of 100 m×100 m，Hegyi’s competition index model for individual trees was used to determine competition within dominant tree populations in an evergreen broad-leaved forest of National Nature Reserve of Mount Tianmu. We investigate trees greater than 5 cm diameter at breast-height（DBH），and determine the species and individual number. Results showed that there were 1 794 trees greater than 5 cm DBH，82 species. From the analysis of dominant degrees showed it contained 8 dominant tree species which were 1 074 individuals in all，Cyclobalanopsis myrsinaefolia，Cyclobalanopsis glauca，and Liquidambar formosana of evergreen broad-leaved trees，and Liquidambar formosana，Cunninghamia lanceolata，Quercus fabri，Torreya grandis，and Pistacia chinensis of non-evergreen broad-leaved trees. The three evergreen broad-leaved dominant populations，had a total plant number of about 71.6% and a total basal area at breast-height of about 44.6%. In the plot，for trees greater than 5 cm DBH，competition among the 8 dominant populations revealed great competition，and an evergreen broad-leaved populations exhibited greater competition than non-broad-leaved populations. Competition in evergreen broad-leaved dominant opulations for intraspecies and interspecies had an intensity order of C. myrsinaefolia ＞ C. glauca ＞ L. formosana with the interspecies competition greater than intraspecies. Competition intensity and DBH of a tree had an exponential relationship （P＜0.01） by regression analysis. Competition intensity of a dominant tree population decreased when tree DBH increased. When tree DBH reached 20 cm，the change range of competition intensity was narrow. Therefore，we can adjust the community structure and succession courses for evergreen broad-leaved forest according to this characteristic for effective protection and sustainable management. ［Ch，1 fig. 3 tab. 15 ref.］
- forest ecology,
- evergreen broad-leaved forest,
- dominant population,
- competition index,
- intraspecific competition,
- interspecific competition,
- Mount Tianmu

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Quantitative relationships with competition of dominant tree populations in an evergreen broad-leaved forest on Mount Tianmu

1. Agricultural Economic Bureau of South Lake Region，Jiaxing 314051，Zhejiang，China;

2. School of Environmental Sciences and Technology，Zhejiang Forestry College，Lin’an 311300，Zhejiang，China

Corresponding author: TANG Meng-ping

Publish Date: 2008-08-20

Key words:

Abstract: Adjacent grid points were used to obtain data for an analysis of dominant degree. Then，with a plot size of 100 m×100 m，Hegyi’s competition index model for individual trees was used to determine competition within dominant tree populations in an evergreen broad-leaved forest of National Nature Reserve of Mount Tianmu. We investigate trees greater than 5 cm diameter at breast-height（DBH），and determine the species and individual number. Results showed that there were 1 794 trees greater than 5 cm DBH，82 species. From the analysis of dominant degrees showed it contained 8 dominant tree species which were 1 074 individuals in all，Cyclobalanopsis myrsinaefolia，Cyclobalanopsis glauca，and Liquidambar formosana of evergreen broad-leaved trees，and Liquidambar formosana，Cunninghamia lanceolata，Quercus fabri，Torreya grandis，and Pistacia chinensis of non-evergreen broad-leaved trees. The three evergreen broad-leaved dominant populations，had a total plant number of about 71.6% and a total basal area at breast-height of about 44.6%. In the plot，for trees greater than 5 cm DBH，competition among the 8 dominant populations revealed great competition，and an evergreen broad-leaved populations exhibited greater competition than non-broad-leaved populations. Competition in evergreen broad-leaved dominant opulations for intraspecies and interspecies had an intensity order of C. myrsinaefolia ＞ C. glauca ＞ L. formosana with the interspecies competition greater than intraspecies. Competition intensity and DBH of a tree had an exponential relationship （P＜0.01） by regression analysis. Competition intensity of a dominant tree population decreased when tree DBH increased. When tree DBH reached 20 cm，the change range of competition intensity was narrow. Therefore，we can adjust the community structure and succession courses for evergreen broad-leaved forest according to this characteristic for effective protection and sustainable management. ［Ch，1 fig. 3 tab. 15 ref.］

Quantitative relationships with competition of dominant tree populations in an evergreen broad-leaved forest on Mount Tianmu

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References

Proportional views

通讯作者: 陈斌, bchen63@163.com

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