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Comparing independent climate-sensitive models of aboveground biomass and diame ter grow th with their compatible simultaneous model system for three larch species in China

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International Journal of Biomathematics 2019年第7期12卷 1-20页

作者： Zhigang Gao Qiuyan Wang zongda hus Peng Luo Guangshuang Duan Ram PSharma Qiaolin Ye Wenqiang Gao Xinyu Song Liyong Fut College of Animal Science and Technology Inner Mongolia University for Nationalities Tongliao 028000 P.R.China Research Institute of Forest Resource Information Techniques Chinese Academy of Forestry Beijing 100091P.R.China Key Laboratory of Forest Management and Growth Modelling National Forestry and Grassland Administration Beijing 100091 P.R.China College of Resources Sichuan Agricultural University Chengdu 611130Sichuan provinceP.R.China Faculty of Forestry and Wood Sciences Czech University of Life Sciences Prague Prague 6-SuchdolCzech Republic College of Information Science and Technology Nanjing Forestry University Nanjing Jiangsu 210037P.R.China College of Computer and Information Techniques Xinyang Normal University Xinyang 464000 Henan ProvinceP.R.China

Accurate estimate of tree biomass is essential for forest *** recent years,several climate-sensitive allometric biomass models with diameter at breast height(D)as a predictor have been proposed for various tree species and climate zones to estimate tree aboveground biomass(AGB).But the allometric models only account for the potential effects of climate on tree biomass and do not simultaneously explain the influence of climate on D *** this study,based on the AGB data from 256 destructively sampled trees of three larch species randomly distributed across the five secondary climate zones in northeastern and northern China,we first developed a climate-sensitive AGB base model and a climate-sensitive D growth base model using a nonlinear least square regression separately.A compatible simultaneous model system was then developed with the climate-sensitive AGB and D growth models using a nonlinear seemingly unrelated *** potential effects of several temperature and precipitation variables on AGB and D growth were *** fitting results of climatic sensitive base models were compared against those of their compatible simultaneous model *** was found that a decreased isothermality([mean of monthly(maximum temperatureminimum temperature)]/(Maximum temperature of the warmest month-Minimum temperature of the coldest month))and total growing season precipitation,and increased annual precipitation significantly increased the values of AGB;an increase of temperature seasonality(a standard deviation of the mean monthly temperature)and precipitation seasonality(a standard deviation of the mean monthly precipitation)could lead to the increase of *** differences of the model fitting results between the compatible simultaneous system with the consideration of climate effects on both AGB and D growth and its corresponding climate-sensitive AGB and D growth base models were very small and insignificant(p>0.05).Compared to the base models,the in

关键词： Larch aboveground biomass diameter at breast height climate change seemingly unrelated regression leave-one-out cross-validation

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