Modelling Individual Tree Diameter Growth of Quercus mongolica Secondary Forest in the Northeast of China

Xuefan Hu, Guangshuang Duan and Huiru Zhang
Additional contact information
Xuefan Hu: Research Institute of Forest Resources Information Techniques, Chinese Academy of Forestry, Beijing 100091, China
Guangshuang Duan: School of Mathematics and Statistics, Xinyang Normal University, Xinyang 464000, China
Huiru Zhang: Research Institute of Forest Resources Information Techniques, Chinese Academy of Forestry, Beijing 100091, China

Sustainability, 2021, vol. 13, issue 8, 1-15

Abstract: Quercus mongolica secondary forest is widely distributed in the northeast of China, but it usually has low productivity, unstable structure, poor health, and low biodiversity. Diameter is a tree variable that is commonly used for forest growth measurement, to provide the basis for forest management decision. Two level generalized linear mixed effects individual tree diameter growth model were developed using data from two times surveys of 12 Q. mongolica secondary forest permanent plots that were distributed among Wangqing forest farms. Random effects of 14 tree species and 12 plots were introduced into the basic model consisting of three factors: tree size, competition of surrounding trees, and site quality. The results showed that initial diameter at breast height(DBH) was the most important variable affecting diameter growth, followed by competition, while the effect of site quality on diameter growth was not significant. Compared with the basic model, the prediction accuracy of the mixed effect model was improved by 17.69 %, where R 2 reached to 0.6805, indicating that it is suitable for the individual-tree diameter growth prediction of the secondary forest of Q. mongolica .

Keywords: Quercus mongolica secondary forest; diameter growth model; two level mixed-effects model; random effects (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/13/8/4533/pdf (application/pdf)
https://www.mdpi.com/2071-1050/13/8/4533/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:13:y:2021:i:8:p:4533-:d:539159

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().