A density-dependent matrix model and its applications in optimizing harvest schemes

作     者：Guofan Shao, WANG Fei, DAI Limin, BAI Jianwei & LI Yingshan Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN 47907, USA Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China Inner Mongolia Agriculture University, Hohhot 010019, China Academy of Forest Inventory and Planning, State Forestry Administration, Beijing 100714, China 

作者机构：Department of Forestry and Natural Resources Purdue University West Lafayette USA Institute of Applied Ecology Chinese Academy of Sciences Shenyang China Inner Mongolia Agriculture University Hohhot China Academy of Forest Inventory and Planning State Forestry Administration Beijing China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2006年第49卷第Z1期

页      面：108-117页

核心收录：

学科分类：0810[工学-信息与通信工程] 090704[农学-森林经理学] 0907[农学-林学] 08[工学] 09[农学] 0829[工学-林业工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：jointly supported by China's Ministry of Science and Technology(Grant No.04EFN216600328) Jilin Yanbian Forestry Group,Liaoning Key Technologies R&D Program(Grant Nos.2004207002&2004201003) the National Natural Science Foundation of China(Grant Nos.30470302&70373044) 

主　　题：uneven-aged forestry, diameter transition model, harvesting intensity, diameter limit, sustainable forest management. 

摘      要：Based on temporal data collected from 36 re-measured plots, transition probabilities of trees from a diameter class to a higher class were analyzed for the broadleaved-Korean pine forest in the Changbai Mountains. It was found that the transition probabilities were related not only to diameter size but also to the total basal area of trees with the diameter class. This paper demonstrates the development of a density-dependent matrix model, DM2, and a series of simulations with it for forest stands with different conditions under different harvest schemes. After validations with independent field data, this model proved a suitable tool for optimization analysis of harvest schemes on computers. The optimum harvest scheme(s) can be determined by referring to stand growth, total timbers harvested, and size diversity changes over time. Three user-friendly interfaces were built with a forest management decision support system FORESTAR(R) for easy operations of DM2 by forest managers. This paper also summarizes the advantages and disadvantages of DM2.