Abstract
Abstract: Natural secondary forests can develop vertical structures of varying complexity. A dominant view in forest ecology is that naturally restored secondary forests tend to have greater structural heterogeneity than managed secondary forests. Structural integrity, however, may differ among forest layers. The present study was aimed to compare tree species diversity and vertical stand structure of natural restoration, and selective logging stand structure after 20 years. In two plots of 0.8 hm2 of selective logging and natural restoration stands, we found that shade-tolerant tree species were dominant in each layer of both stands and also showed some dominance. The diameter distribution of the upper forest layers was similar in both stands. Furthermore, the proportion of trees with the optimal spatial structure unit in selective logging stand was larger than that in the natural recovery stand, but the spatial complexity was smaller. The proportion of dominant trees in upper forest layer in selective logging stand was also significantly higher than that of the natural recovery forest, and the proportion of inferior trees in other forest layers was larger. The results showed that the short-term restoration of selective forest stand promotes the succession of forests due to strong renewal capacity and suitable spatial structure. By using tri-variate distribution of spatial structure, we found that the restoration state of natural recovery and spatial structure of the selective logging stand play an important role in the process of restoring forests.
Liying Xu. (2021) IMPACT OF SELECTIVE LOGGING OF SECONDARY FOREST OF Tilia amurensis ON STAND STRUCTURE AFTER 20 YEARS, Pakistan Journal of Agricultural Sciences, Volume 58, Issue 2.
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