A Composite Index-based Approach for Hierarchical Assessment of Forest Ecosystem Health: An Example of Pinus Tabulaeformis

2014 ◽  
Vol 9 (7) ◽  
pp. 415-426
Author(s):  
Mingxia Zhang ◽  
Dexiang Wang ◽  
Zhao Xu ◽  
Qiuju Guo
Keyword(s):  
Forest Ecosystem ◽  
Ecosystem Health ◽  
Composite Index ◽  
Pinus Tabulaeformis ◽  
Hierarchical Assessment

Health Evaluation of Larix Kaempferi Plantation Ecosystem Based on BP Neural Network Model

2013 ◽  
Vol 663 ◽  
pp. 823-826
Author(s):  
Shu Rong Hui ◽  
Xiao Xiao Dai ◽  
Hui Liu ◽  
Qiang Liu
Keyword(s):  
Neural Network ◽  
Forest Ecosystem ◽  
Adaptive Learning ◽  
Bp Neural Network ◽  
Ecosystem Health ◽  
Tree Height ◽  
Slope Aspect ◽  
Larix Kaempferi ◽  
The Index System ◽  
Bp Neural Network Model

Based on the basic theory of the forest ecosystem, we build the index system to evaluate forest ecosystem health from the stand-scale and take advantage of improved BP neural network to evaluate the ecosystem health of Larix Kaempferi plantation in the Liaodong area quantitatively. And then we analyze the stand-scale health grade status according to different slope aspect, forest age, average tree height and altitude. The results indicate that we make the satisfactory process to research the complex forest ecosystem using the improved BP neural network. The improved BP neural network which uses the momentum-adaptive learning rate adjustment algorithm and L-M learning rules decreases iteration times, makes the convergence speed very fast and improve the precision.

On forest ecosystem health and its Connotations

2002 ◽  
Vol 13 (2) ◽  
pp. 147-150
Author(s):  
Chen Gao ◽  
Wang Qing-li ◽  
Deng Hong-bing ◽  
Dai Li-min
Keyword(s):  
Forest Ecosystem ◽  
Ecosystem Health

Anthropogenic Calcium Depletion: A Unique Threat to Forest Ecosystem Health?

2001 ◽  
Vol 7 (4) ◽  
pp. 214-228 ◽  
Author(s):  
Paul G. Schaberg ◽  
Donald H. DeHayes ◽  
Gary J. Hawley
Keyword(s):  
Forest Ecosystem ◽  
Ecosystem Health ◽  
Calcium Depletion
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