Construction of A Model for Mass Estimation of Above-Ground Coarse Woody Residues in Nanling National Reserve
In order to better support the estimation of carbon storage and carbon sink in Guangdong Nanling National Nature Reserve and nearby forest ecosystems,the study used 300 coarse wood debris(CWD)samples collected from broad-leaved and mixed coniferous and broad-leaved forests in Guangdong Nanling National Na-ture Reserve between the altitudes of 400 and 1 800 m,and constructed a model for estimating the quality of the CWDs using decomposition level and volume parameters as independent variables.The average diameter of CWD samples ranged from 3.332 to 5.919 cm,average length from 1.55 to 2.80 m,and average density from 0.150 to 0.224 g·cm-3.Although the diameter,length,and density varied widely among individuals and sample plots,they generally did not change with elevation and forest type,and the representativeness was good.The CWD decomposition level had a significant effect on the sample characteristics,and the sample density de-creases with the increase of the decomposition level.The established model has a high degree of fitting,and the decomposition level and volume parameters can effectively explain the quality change of CWD.
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