Structure of different stand layers and management optimization strategies in a Masson pine plantation in southern subtropical, China

Jun, Jiang; Lu, Yuanchang; Pang, Lifeng; Zhang, Xianqiang; Li, Tingting; Xing, Haitao

doi:10.1016/j.chnaes.2015.04.005

Cited by 2 publications

(3 citation statements)

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“…The vertical stratification of the canopy is a forest attribute that influences both tree growth and understory community structure [ 16 , 17 ]. Different forest strata have their own functions and roles.…”

Section: Discussionmentioning

confidence: 99%

“…Because the forest vertical structure largely determines the differences in the distribution of resources such as water, heat, light, and nutrients in the forest [ 16 ], it has an important effect on species growth, reproduction, death, and resource utilization [ 17 – 19 ]. Therefore, many researchers have begun to explore the impact of forest vertical structure on regeneration.…”

Section: Introductionmentioning

confidence: 99%

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Influence of strata-specific forest structural features on the regeneration of the evergreen broad-leaved forest in Tianmu Mountain

2021

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The vertical stratification of the stand may lead to a high heterogeneity of microenvironment in the forest, which further influences the understory regeneration and succession of the forest. Most relevant previous studies emphasized the overall effects of the Whole-stand structural characteristics on understory regeneration, while the strata-specific impacts of the overstory should be explored especially for those forests with a complicated combination of overstory species and heights. In this study, a subtropical evergreen broad-leaved forest in Tianmu Mountain of China was intensively investigated within 25 plots of 20 m × 20 m, aiming to find out how significant the stratified overstory (trees with diameter at breast height (DBH) ≥ 5 cm) structure and non-structure characteristics impact the understory (trees with DBH < 5 cm) regeneration. Regardless of species composition, the studied overstory was evenly divided into three strata (i.e. upper, middle and lower strata) according to their heights. Redundancy analysis was applied to explore both overall and strata-specific forest structure on characteristics (height, DBH, species diversity, and density) of tree regeneration. We found that the overall effect of the whole overstory on the forest regeneration depended mostly on diameter at breast height (DBH), tree species richness index and crown width. However, when analyzing with the strata-specific characteristics, the most pronounced impact factors for the regeneration were tree height of the upper and lower forest strata, tree species richness index and crown width of the middle and lower forest strata, and the competition index impact of the lower forest stratum. Among the three strata, the lower forest stratum showed the most significant impact with three characteristics on the understory regeneration, which may be attributed to their direct competition within the overlapping near-ground niches. Among the new generations, seedlings and saplings were more sensitive to the overstory structural characteristics than young trees. Our results suggest that the overstory showed strata-specific effects on the understory regeneration of evergreen broad-leaved forests in subtropical China, which provides theoretical basis for strata-specific forest management in similar forests.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of strata-specific forest structural features on the regeneration of the evergreen broad-leaved forest in Tianmu Mountain

2021

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“…Too large tree basal area and tree height of forest were not conducive to regeneration trees growth (Graber, 1976;Ou et al, 2017). Because the forest vertical structure largely determines the differences in the distribution of resources such as water, heat, light and nutrients in the forest (Jiang et al, 2015), it has an important effect on species growth, reproduction, death and resource utilization (Latham et al, 1998;Hao et al, 2007;Zhang et al, 2016;Zhuang et al, 2017;Nasiri et al, 2018). Therefore, the impact of forest vertical structure on regeneration had become one of the focuses of many scholars.…”

Section: Introductionmentioning

confidence: 99%

Relationship Between Forest Strata Structure and Regeneration in the Subtropical Evergreen Broad-Leaved Forest

Long

Mengping

Chen

2020

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Background: Regeneration is an extremely important and complex ecological process, which is disturbed by many factors. The current stand structure has an important influence on regeneration. The aim of this study is to provide theoretical reference for improving the regeneration capacity subtropical evergreen broad-leaved forest and formulating management measures of regeneration restoration.Methods: A permanent plot of 100m × 100m was set up in the evergreen broad-leaved forest of Tianmu Mountain National Nature Reserve, Zhejiang Province, China. The plot was divided into 25 survey units of 20m × 20m by the adjacent grid survey method, and all the trees in the plot were investigated. The tree height, DBH, crown width, density, species richness index, aggregation index, competition index and mingling of each forest stratum were used as the stand structure index. The tree height, DBH, crown width, density and species richness index of regeneration trees were used as regeneration indicators. Redundancy analysis (RDA) was used to explore the relationship between forest strata structure and regeneration of evergreen broad-leaved forest. Results: In the whole stand, DBH, tree species richness index and crown width were the main structure factors affecting regeneration. In the upper forest stratum, the tree height was the main structure factor affecting regeneration. In the middle forest stratum, the tree species richness index and crown width were the main factors affecting regeneration. In the lower forest stratum, crown width, competition index, tree height and tree species richness index were the main factors affecting regeneration. The effects of tree species richness index and crown width on regeneration in the whole stand were mainly reflected in the middle and lower forest strata in each forest stratum. Conclusions: The influencing order of each forest stratum structure on regeneration was: lower forest stratum > middle forest stratum > upper forest stratum. Different regeneration indicators had different responses to the main stand structure indices, while the young tree height and DBH, and the tree species diversity and density of regeneration trees were most affected by the main stand structure indices. In order to promote the regeneration of evergreen broad-leaved forest in the future, different management measures should be taken for different forest strata, and the threshold value of each index should be controlled.

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Structure of different stand layers and management optimization strategies in a Masson pine plantation in southern subtropical, China

Cited by 2 publications

References 25 publications

Influence of strata-specific forest structural features on the regeneration of the evergreen broad-leaved forest in Tianmu Mountain

Influence of strata-specific forest structural features on the regeneration of the evergreen broad-leaved forest in Tianmu Mountain

Relationship Between Forest Strata Structure and Regeneration in the Subtropical Evergreen Broad-Leaved Forest

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