Changes in tree species richness, stand structure and soil properties in a successional chronosequence in northern Chiloé Island, Chile

Abstract 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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Do tree-species richness, stand structure and ecological factors affect the photosynthetic efficiency in European forests?

Web Ecology ◽

10.5194/we-15-39-2015 ◽

2015 ◽

Vol 15 (1) ◽

pp. 39-41 ◽

Cited By ~ 2

Author(s):

F. Bussotti ◽

M. Pollastrini

Keyword(s):

Species Richness ◽

Tree Species ◽

Photosynthetic Efficiency ◽

Stand Structure ◽

Ecological Factors ◽

European Forests ◽

Tree Species Richness

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

10.21203/rs.3.rs-59358/v1 ◽

2020 ◽

Author(s):

Junsong Long ◽

Mengping Tang

Keyword(s):

Species Richness ◽

Tree Species ◽

Stand Structure ◽

Tree Height ◽

Crown Width ◽

Tree Species Richness ◽

Broad Leaved Forest ◽

Forest Strata ◽

Richness Index ◽

Leaved Forest

Abstract 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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The mechanisms explaining tree species richness and composition are convergent in a megadiverse hotspot

Biodiversity and Conservation ◽

10.1007/s10531-019-01910-9 ◽

2019 ◽

Vol 29 (3) ◽

pp. 799-815

Author(s):

Victor P. Zwiener ◽

André A. Padial ◽

Márcia C. M. Marques

Keyword(s):

Species Richness ◽

Tree Species ◽

Tree Species Richness

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Tree species richness and the logging of natural forests: A meta-analysis

Forest Ecology and Management ◽

10.1016/j.foreco.2012.04.001 ◽

2012 ◽

Vol 276 ◽

pp. 146-153 ◽

Cited By ~ 52

Author(s):

Jason A. Clark ◽

Kristofer R. Covey

Keyword(s):

Species Richness ◽

Tree Species ◽

Meta Analysis ◽

Natural Forests ◽

Tree Species Richness

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One, two and three-dimensional geometric constraints and climatic correlates of North American tree species richness

Ecography ◽

10.1111/j.1600-0587.2010.06395.x ◽

2010 ◽

Vol 34 (2) ◽

pp. 267-275 ◽

Cited By ~ 5

Author(s):

Helen T. Murphy ◽

Jeremy VanDerWal ◽

Jon Lovett-Doust

Keyword(s):

Species Richness ◽

North American ◽

Tree Species ◽

Three Dimensional ◽

Geometric Constraints ◽

Tree Species Richness

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Potential Changes in Tree Species Richness and Forest Community Types following Climate Change

Ecosystems ◽

10.1007/s10021-001-0003-6 ◽

2001 ◽

Vol 4 (3) ◽

pp. 186-199 ◽

Cited By ~ 144

Author(s):

Louis R. Iverson ◽

Anantha M. Prasad

Keyword(s):

Climate Change ◽

Species Richness ◽

Tree Species ◽

Forest Community ◽

Tree Species Richness ◽

Community Types

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Spatial pattern of riparian plants along stream order among mountain rivers in China

Journal of Water and Climate Change ◽

10.2166/wcc.2018.047 ◽

2018 ◽

Vol 9 (2) ◽

pp. 322-330

Author(s):

Rong Sun ◽

Xiaojie Luo ◽

Xiangyu Meng ◽

Yan Wang

Keyword(s):

Species Richness ◽

Environmental Factors ◽

Tree Species ◽

Riparian Vegetation ◽

Stream Order ◽

River Continuum ◽

Riparian Plants ◽

Tree Species Richness ◽

Riparian Species ◽

Significant Difference

Abstract The streams in a watershed form a hierarchical network system. From the perspective of the river continuum, this classification system is the result of gradual increase in traffic. This study analyzed the riparian species richness, diversity and environmental factors along a six-order hierarchical mountain river in the Donghe watershed, China. A total of 34 sampling sites were sampled to study the spatial distribution of riparian plants among different stream orders. The results showed: Environmental factors among stream orders had significant differences. Among stream order, species richness showed remarkable differences. The species richness rose firstly and dropped afterwards except for tree species richness; tree species richness decreased while stream order increased. The same is true for shrub quadrat species richness. Shannon-Wiener diversity, Simpson dominance and Pielou uniformity showed significant difference among stream orders; Shannon-Wiener diversity rose firstly then dropped afterwards. For integrated environmental factors and community characteristics, we found the changes of stream orders had a significant impact on riparian habitats and riparian vegetation. Further analysis showed that riparian vegetation experienced different types and degrees of disturbance in different stream orders. This meant that a hierarchical management strategy should be applied to riparian vegetation management.

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Factors Influencing the Natural Forest Regeneration at Khadimnagar National Park, Bangladesh

Borneo Journal of Resource Science and Technology ◽

10.33736/bjrst.3437.2021 ◽

2021 ◽

Vol 11 (1) ◽

pp. 73-83

Author(s):

MAHEDI HASAN LIMON ◽

SAIDA HOSSAIN ARA ◽

MOHAMMAD GOLAM KIBRIA

Keyword(s):

Species Richness ◽

Bulk Density ◽

Total Variation ◽

Soil Ph ◽

Tree Species ◽

Natural Regeneration ◽

National Park ◽

Canopy Openness ◽

Site Factors ◽

Tree Species Richness

Natural regeneration is an indicator of a healthy forest, hence, understanding the influence of site factors on natural regeneration is a significant concern for ecologists. This work aimed to assess the impact of site factors on natural tree regeneration at Khadimnagar National Park (KNP). Biotic factors (tree density, tree species richness, and basal area), physical factors (elevation, canopy openness), and soil properties (bulk density, moisture content, soil pH, organic matter, sand, silt, and clay) data were investigated from 71 sample plots to examine their effects on natural regeneration density and richness in KNP. Stepwise multiple linear regression analysis was done to predict both regeneration density and regeneration richness. The results showed that soil pH (p<0.001), canopy openness (p<0.001), tree species richness (p<0.01), and bulk density (p<0.01) had a significant effect on regeneration density, explaining 42% of the total variation. Regeneration richness was driven by four factors: tree species richness (p<0.01), soil pH (p<0.001), elevation (p<0.01), and canopy openness (p<0.01) with a model that explained 60% of the total variation. This study observed that soil pH, tree species richness, and canopy openness are the main controlling factors that influenced both the density and richness of regenerating species in KNP. Therefore, these findings have implications for natural resource management, especially in selecting suitable silvicultural systems in a tropical forest under protected area management where enhanced tree cover and conservation of biodiversity are needed.

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