Population Status and Recovery Potential of <i>Dalbergia odorifera</i> Under Anthropogenic Disturbance: Evidence From Hainan Island, China.

3.2 Static Life Table and Survivorship Curve of the Population 3.2.1 Static Life Table As shown in Table 2 , with the increase of age classes, the standardized survival number ( lx ) and the logarithm of standardized survival number ( LNlx ) decrease step by step; the number of dead individuals ( dx ) is the largest in Age class II (478), while the number of deaths in other age classes is basically maintained at a consistent level; the mortality rate ( q x ) shows an increasing trend with the increase of age classes, forming two death peaks in Age classes II and IV, with the highest mortality rate (0.91) in Age class IV; the life expectancy ( ex ) reflects the survival ability of individuals in the age class.

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It can be seen from the life table that the life expectancy decreases with the increase of age classes and is the largest (1.87) in Age class I; the attrition rate ( K x ) of the population shows an increasing trend, reaching 2.40 in Age class IV, while the survival rate ( S x ) shows a decreasing trend with the increase of age classes.

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odorifera increase positively with tree age, with a highly significant linear correlation between DBH and tree age and an average annual DBH increment of approximately 0.8 cm under natural habitats (Chen et al. 2016 ; Zhou et al. 2022 ).

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