An R package for national forest health evaluation system at the forest stand level in China
Assessing forest ecosystem health is an effective way for forest resource management (Zhang et al. 2014). In the 1990s, scholars started to monitor and assess the forest health condition, and established a number of specific forest health evaluation systems in the worldwide (Ferretti 1997; Kolb et al. 1994). In China, forest health evaluations have been reported since the 2000s. However, there remains great difficulty in accurate forest health evaluation due to the complexity of forest ecosystems (Wang et al. 2015), and still lack of a reliable and uniform forest health evaluating standards. Zhang & Lei (2014) proposed and developed a national forest health evaluation system at the forest stand level using analytic hierarchy process (AHP), has a high application value and practical significance.
The national forest health evaluation system was composed by 5 parts as follow: (1) Set of forest health evaluating indices at the forest stand level; (2) Threshold and membership functional models; (3) Calculation of the weights for forest health evaluating indices; (4) Calculation of forest health comprehensive index; (5) Grades of forest health evaluation (Chai ZZ.2016).
The foestHES package can easily relize the above forest health evaluation process, and effectively assess and managementforest resources.
- Ferretti M. 1997. Forest Health Assessment and Monitoring – Issues for Consideration. Environmental Monitoring and Assessment 48:45-72. 10.1023/A:1005748702893.
- Kolb T, Wagner M, and Covington WW. 1994. Concepts of forest health: utilitarian and ecosystem perspectives. Society of American Foresters.
- Wang DX, Xu Z, Chai ZZ, and Kang B. 2015. Theory and practice of forest health management in the Qinling Mountains, China. Yangling,China: Publisher of Northwest A&F University.
- Zhang HR, and Lei XD. 2014. Health management techniques for typical forest types. Beijing: Publishing house of forestry, China.
- Zhang MX, Wang DX, Xu Z, and Guo QJ. 2014. A Composite Index-based Approach for Hierarchical Assessment of Forest EcosystemHealth: An Example of Pinus tabulaeformis. International Journal of Multimedia and Ubiquitous Engineering 9:415-426. http://dx.doi.org/10.14257/ijmue.2014.9.7.35.
- Chai ZZ.2016.National forest health evaluation system at the forest stand level in China. http://www.forestsoil.net/Upload/ueditor/file/20160514/1463221795322480.pdf.
The development version from github:
# install.packages("devtools")
devtools::install_github("Zongzheng/forestHES")