文献类型：会议论文

英文题名：Development of TRIPLEX-Management model for simulating the response of forest growth to pre-commercial thinning

作者：Wang, Weifeng[1] Peng, Changhui[1] Zhang, S. Y.[2] Zhou, Xiaolu[1] Larocque, Guy R.[3] Kneeshaw, Daniel D.[1] Lei, Xiangdong[1,4]

第一作者：Wang, Weifeng

通信作者：Peng, CH[1]

机构：[1]Univ Quebec, Dept Sci Biol, Inst Environm Sci, Montreal, PQ H3C 3P8, Canada;[2]FPInnovations, Forintek Div, Vancouver, BC V6T 1W5, Canada;[3]Nat Resources Canada, Canadian Forest Serv, Laurentian Forestry Ctr, Stn St Foy, PQ G1V 4C7, Canada;[4]Chinese Acad Forestry, Inst Forest Resource Informat Tech, Beijing 100091, Peoples R China

会议论文集：Conference of the International-Society-for-Ecological-Modelling

会议日期：OCT 06-09, 2009

会议地点：Quebec City, CANADA

语种：英文

外文关键词：Biomass; Diameter distribution; Forest management; Timber yield; Weibull distribution

年份：2011

摘要：In order to simulate forest growth response to pre-commercial thinning (PCT), TRIPLEX1.0 - a process-based model designed to predict forest growth as well as carbon (C) and nitrogen (N) dynamics - was modified and improved to also simulate managed forest ecosystem thinning practices. A three-parameter Weibull distribution model was integrated to simulate thinning treatments within the newly developed TRIPLEX-Management model. The thinning intensity component within the model allows users to simulate thinning treatments by applying basal area, stand density and volume to quantify thinning intensity. Natural mortality decreased following thinning due to an increase in growing space for residual stems. Predicted litterfall pools also increased after thinning events took place. The TRIPLEX-Management model was tested against published observational data for Jack Pine (Pinus banksiana Lamb.) stands subjected to PCT in Northwestern Ontario, Canada. The coefficients of determination (R(2)) between the predicted and observed variables including stand density, mean DBH (diameter at breast height), the quadratic mean DBH, total volume and merchantable volume as well as belowground, aboveground, and total biomass ranged from 0.50 to 0.88 (n = 20, P < 0.001) with the exception of mean tree height (R(2) = 0.25, n = 20, P < 0.05). Overall, the willmott index of agreement between predicted and observed variables ranged from 0.97 to 1.00. Results show that the TRIPLEX-Management model is generally capable of simulating growth response to PCT for Jack Pine stands. (C) 2010 Elsevier B.V. All rights reserved.