干旱区生态环境知识资源中心(Arid): Modeling height-diameter relationship for Populus euphratica in the Tarim riparian forest ecosystem, Northwest China

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	Modeling height-diameter relationship for Populus euphratica in the Tarim riparian forest ecosystem, Northwest China
	Aishan Tayierjiang; Halik Umut; Betz Florian; Gartner Philipp; Cyffka Bernd
来源期刊	Journal of Forestry Research
ISSN	1007-662X
出版年	2016
卷号	27 期号:4 页码:889-900
英文摘要	Modeling height-diameter relationships is an important component in estimating and predicting forest development under different forestmanagement scenarios. In this paper, ten widely used candidate height-diametermodels were fitted to tree height and diameter at breast height (DBH) data for Populus euphratica Oliv. within a 100 ha permanent plots at Arghan Village in the lower reaches of the Tarim River, Xinjiang Uyghur Autonomous Region of China. Data from 4781 trees were used and split randomly into two sets: 75 % of the data were used to estimate model parameters (model calibration), and the remaining data (25 %) were reserved for model validation. All model performances were evaluated and compared by means of multiple model performance criteria such as asymptotic t-statistics of model parameters, standardized residuals against predicted height, root mean square error (RMSE), Akaikes information criterion (AIC), mean prediction error (ME) and mean absolute error (MAE). The estimated parameter a for model (6) was not statistically significant at a level of a = 0.05. RMSE and AIC test result for all models showed that exponential models (1), (2), (3) and (4) performed significantly better than others. All ten models had very small MEs and MAEs. Nearly all models underestimated tree heights except for model (6). Comparing the MEs and MAEs of models, model (1) produced smaller MEs (0.0059) and MAEs (1.3754) than other models. To assess the predictive performance of models, we also calculated MEs by dividing the model validation data set into 10-cm DBH classes. This suggested that all models were likely to create higher mean prediction errors for tree DBH classes >20 cm. However, no clear trend was found among models. Model (6) generated significantly smaller mean prediction errors across all tree DBH classes. Considering all the aforementioned criteria, model (1): TH = 1.3 + a/(1 + b* e~(-cDBH) and model (6): TH = 1.3 + DBH~2/(a + b DBH + c * DBH~2) are recommended as suitable models for describing the height-diameter relationship of P. euphratica. The limitations of other models showing poor performance in predicting tree height are discussed. We provide explanations for these shortcomings.
英文关键词	Desert ecosystem Height-diameter model Populus euphratica Riparian forest management Tarim River
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Forestry
CSCD记录号	CSCD:5747803
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335675
作者单位	Aishan Tayierjiang, College of Resources & Environmental Sciences, Xinjiang University, Key Laboratory of Oasis Ecology, Xinjiang, Urumqi, Xinjiang 830046, China.; Halik Umut, College of Resources & Environmental Sciences, Xinjiang University, Key Laboratory of Oasis Ecology, Xinjiang, Urumqi, Xinjiang 830046, China.; Betz Florian, Faculty of Mathematics and Geography, Catholic University of Eichstaett-Ingolstadt, Eichstaett, 85072, Germany.; Cyffka Bernd, Faculty of Mathematics and Geography, Catholic University of Eichstaett-Ingolstadt, Eichstaett, 85072, Germany.; Gartner Philipp, Geoinformation in Environmental Planning Lab, Technical University of Berlin, Berlin 10623, Germany.
推荐引用方式 GB/T 7714	Aishan Tayierjiang,Halik Umut,Betz Florian,et al. Modeling height-diameter relationship for Populus euphratica in the Tarim riparian forest ecosystem, Northwest China[J],2016,27(4):889-900.
APA	Aishan Tayierjiang,Halik Umut,Betz Florian,Gartner Philipp,&Cyffka Bernd.(2016).Modeling height-diameter relationship for Populus euphratica in the Tarim riparian forest ecosystem, Northwest China.Journal of Forestry Research,27(4),889-900.
MLA	Aishan Tayierjiang,et al."Modeling height-diameter relationship for Populus euphratica in the Tarim riparian forest ecosystem, Northwest China".Journal of Forestry Research 27.4(2016):889-900.