SPATIAL PATTERN, COMPETITION AND SPATIAL ASSOCIATION OF TREES IN MIXED HORNBEAM STANDS USING UNIVARIATE AND BIVARIATE RIPLEY’S K-FUNCTION (CASE STUDY: RESERVE AREA, DISTRICT 3 OF ASALEM FORESTS)

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

AMANZADEH B.; POURMAJIDIAN M.R.; SAGHEB TALEBI KH.; HOJJATI S.M.

Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Iranian Journal of Forest and Poplar Research Year:2015 | Volume:23 | Issue:1 Page(s): 37-52

Download Full-Text

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Persian Verion

View:

751

Download:

Cites:

Information Journal Paper

Title

SPATIAL PATTERN, COMPETITION AND SPATIAL ASSOCIATION OF TREES IN MIXED HORNBEAM STANDS USING UNIVARIATE AND BIVARIATE RIPLEY’S K-FUNCTION (CASE STUDY: RESERVE AREA, DISTRICT 3 OF ASALEM FORESTS)

Author(s)

AMANZADEH B. | POURMAJIDIAN M.R. | SAGHEB TALEBI KH. | HOJJATI S.M. | Issue Writer Certificate

Keywords

SPATIAL ASSOCIATIONQ2

ASALEMQ2

SPATIAL PATTERNQ2

RIPLEY’S K–FUNCTIONQ2

MIXED STANDSQ2

COMPETITIONQ2

Abstract

In order to study the COMPETITION and SPATIAL ASSOCIATION of trees in mixed Hornbeam stands, two 1-ha sample plots (100m×100m) were selected in the reserve area of ASALEM forests in Guilan. In each plot, species and diameter at breast height (DBH) of all trees with a diameter > 7.5 cm were recorded and mapped using slope-corrected distance and azimuth from southwest corner of each plot. Distances and azimuths were later transformed to Cartesian coordinates, and all of the measured trees were assigned to one of four diameter size classes: ST (Small Timber, (DBH £ 32.5 cm), MT (Medium Timber, 32.5 < DBH £ 52.5 cm), LT (Large Timber, 52.5 < DBH £ 72.5 cm) and ELT (Extra-Large Timber, DBH > 72.5). SPATIAL PATTERNs of the entire trees as well as the SPATIAL ASSOCIATIONs among tree size classes (Intra-specific) and among species (Interspecific) were analyzed by univariate and bivariate Ripley’s K-function. Results showed that the two stands exhibited a clustered distribution. Furthermore, the interaction between the ST class and other classes was significant (P<0.05). Although we found a positive correlation between the ST and other tree classes, spatial distribution of trees showed different patterns at different spatial scales. The starting point of the attraction in LT and ELT classes was observed at a small scale, whereas it tended towards independent associations in MT class at scale of 10 meter (P>0.05). The inter-specific investigation revealed that Fagus orientalis and Carpinus betulus trees tend towards an independent association at 1-20 meter scales. At higher scales they showed yet a negative correlation. Moreover, F. orientalis was significantly and negatively correlated to Alnus subcordata at small scales. However, their mutual intra-specific and interspecific effects were different due to the fact that different natural stands have variety of demands during their life cycle. Therefore, it may not necessarily conform to their response to natural processes. This study concludes a founded understanding of SPATIAL PATTERN of stands to be a helpful indicator for managing forests based on the currently operational close- to- nature silvicultural system.

Cites

No record.

References

No record.

Cite

APA: Copy

AMANZADEH, B., POURMAJIDIAN, M.R., SAGHEB TALEBI, KH., & HOJJATI, S.M.. (2015). SPATIAL PATTERN, COMPETITION AND SPATIAL ASSOCIATION OF TREES IN MIXED HORNBEAM STANDS USING UNIVARIATE AND BIVARIATE RIPLEY’S K-FUNCTION (CASE STUDY: RESERVE AREA, DISTRICT 3 OF ASALEM FORESTS). IRANIAN JOURNAL OF FOREST AND POPLAR RESEARCH, 23(1), 37-52. SID. https://sid.ir/paper/110967/en

Vancouver: Copy

AMANZADEH B., POURMAJIDIAN M.R., SAGHEB TALEBI KH., HOJJATI S.M.. SPATIAL PATTERN, COMPETITION AND SPATIAL ASSOCIATION OF TREES IN MIXED HORNBEAM STANDS USING UNIVARIATE AND BIVARIATE RIPLEY’S K-FUNCTION (CASE STUDY: RESERVE AREA, DISTRICT 3 OF ASALEM FORESTS). IRANIAN JOURNAL OF FOREST AND POPLAR RESEARCH[Internet]. 2015;23(1):37-52. Available from: https://sid.ir/paper/110967/en

IEEE: Copy

B. AMANZADEH, M.R. POURMAJIDIAN, KH. SAGHEB TALEBI, and S.M. HOJJATI, “SPATIAL PATTERN, COMPETITION AND SPATIAL ASSOCIATION OF TREES IN MIXED HORNBEAM STANDS USING UNIVARIATE AND BIVARIATE RIPLEY’S K-FUNCTION (CASE STUDY: RESERVE AREA, DISTRICT 3 OF ASALEM FORESTS),” IRANIAN JOURNAL OF FOREST AND POPLAR RESEARCH, vol. 23, no. 1, pp. 37–52, 2015, [Online]. Available: https://sid.ir/paper/110967/en

Related Journal Papers