Long-term (1992-2015) dynamics of interspecific associations among tree species in a monsoon evergreen broad-leaved forest in Dinghushan Biosphere Reserve

2019 ◽  
Vol 39 (17) ◽  
Author(s):  
邹顺 ZOU Shun ◽  
周国逸 ZHOU Guoyi ◽  
张倩媚 ZHANG Qianmei ◽  
孟泽 MENG Ze ◽  
褚国伟 CHU Guowei ◽  
...  
Keyword(s):  
Tree Species ◽  
Biosphere Reserve ◽  
Interspecific Associations ◽  
Broad Leaved Forest ◽  
Leaved Forest

scholarly journals Type, Structure, Dynamics and Management of the Lower Subtropical Evergreen Broad-leaved Forest in the Dinghushan Biosphere Reserve of China

Tropics ◽  
1996 ◽  
Vol 6 (4) ◽  
pp. 335-350 ◽  
Author(s):  
G. H. KONG ◽  
Z. L. HUANG ◽  
Q. M. ZHANG ◽  
S. Z. Liu ◽  
J. M. Mo ◽  
...  
Keyword(s):  
Biosphere Reserve ◽  
Type Structure ◽  
Structure Dynamics ◽  
Broad Leaved Forest ◽  
Leaved Forest

Tree species diversity and soil patchiness in a temperate broad-leaved forest with limited rooting space

Flora ◽  
2002 ◽  
Vol 197 (2) ◽  
pp. 118-125 ◽  
Author(s):  
Dirk Hölscher ◽  
Dietrich Hertel ◽  
Christoph Leuschner ◽  
Magnus Hottkowitz
Keyword(s):  
Species Diversity ◽  
Tree Species ◽  
Tree Species Diversity ◽  
Broad Leaved Forest ◽  
Leaved Forest

scholarly journals The tonkin snub-nosed monkey Rhinopithecus avunculus population in the Quan Ba forest, north-east Vietnam: an identification of priority habitat for conservation

2019 ◽  
Vol 41 (3) ◽  
Author(s):  
Nguyen Xuan Dang ◽  
Nguyen Xuan Nghia ◽  
Pham Van The
Keyword(s):  
Conservation Area ◽  
Forest Patch ◽  
Term Survival ◽  
Forest Farming ◽  
North East ◽  
Broad Leaved Forest ◽  
Priority Habitat ◽  
The Hill ◽  
Leaved Forest

The Tonkin Snub-nosed Monkey Rhinopithecus avunculus is among the World’s 25 most endangered primates. At present, the species is found only in few forest areas in Ha Giang and Tuyen Quang Provinces, north-east Vietnam with a total number not exceeding 250 individuals.  The forest block in Cao Ma Po, Ta Van and Tung Vai Communes of Quan Ba District, Ha Giang Province (the Cao - Ta - Tung forest) harbors the second largest population of Tonkin Snub-nosed Monkey. This population was estimated to be conisted of about 30–35 individuals in 2007.  However, it faces a number of serious threats (wildlife hunting, habitat degradation by widespread forest farming of Tsao-ko cardamom plant, etc.) that may lead the population to be extinct in near future. The population was reduced to 15–21 individuals in 2016 due to these threats. In 2017–2018, we conducted a study to identify a priority habitat area to establish the Quan Ba Tonkin Snub-nosed Monkey Conservation Area. The results of our study show that the distribution of  the Quan Ba Tonkin Snub-nosed Monkey  population is  confined to a small area (about 5,000 ha) belonging to the Theng Chu Phin, Dao Dan Chai, Ta Lay mountains, the Hill 754 and a forest patch along the Vietnam-China  border  from the Post 283  to Post 295. This area harbors the best forest of the Cao - Ta - Tung area. The forest covers 92.3% of the area, and only 7.7% of the area is a non-forest land. There are two types of forest: evergreen broad-leaved forest (50.0% of total area) and limestone evergreen broad-leaved forest (42.3%).  The evergreen broad-leaved forest has been degraded to medium and restoration status. Tsao-ko cardamom Amomum tsao-ko fields are widespread. The limestone evergreen broad-leaved forest of almost primary status remains in very steep slopes and limestone mountains. The Cao - Ta - Tung forest was designated as a watershed protection forest that allows farming of agricultural and medicinal plants inside the forest and the forest farming of Tsao-ko cardamom is widespread becoming the most serious threat to the long-term survival of the Tonkin Snub-nosed Monkey population. In order to ensure long-term survival of the Quan Ba Tonkin Snub-nosed Monkey population, the  area of the Theng Chu Pin, Dao Dai Chai, Ta Lay, Tung Lau mountains,  the Hill 754 and a forest patch along the Vietnam-China border from the Post 283 to Post 285 must be designated as a special-use forest, i.e. to establish a Quan Ba Tonkin Snub-nosed Monkey Conservation Area. 

scholarly journals Analysis of xylem anatomy and function of representative tree species in a mixed evergreen and deciduous broad-leaved forest of mid-subtropical karst region

2021 ◽  
Vol 45 (4) ◽  
pp. 394-403
Author(s):  
Ming-Yuan NI ◽  
Amy Ny Aina ARITSARA ◽  
Yong-Qiang WANG ◽  
Dong-Liu HUANG ◽  
Wei XIANG ◽  
...  
Keyword(s):  
Tree Species ◽  
Karst Region ◽  
Xylem Anatomy ◽  
Broad Leaved Forest ◽  
And Function ◽  
Leaved Forest

scholarly journals The tonkin snub-nosed monkey Rhinopithecus avunculus population in the Quan Ba forest, north-east Vietnam: an identification of priority habitat for conservation

2019 ◽  
Vol 41 (3) ◽  
Author(s):  
Nguyen Xuan Dang ◽  
Nguyen Xuan Nghia ◽  
Pham Van The
Keyword(s):  
Conservation Area ◽  
Forest Patch ◽  
Term Survival ◽  
Forest Farming ◽  
North East ◽  
Broad Leaved Forest ◽  
Priority Habitat ◽  
The Hill ◽  
Leaved Forest

The Tonkin Snub-nosed Monkey Rhinopithecus avunculus is among the World’s 25 most endangered primates. At present, the species is found only in few forest areas in Ha Giang and Tuyen Quang Provinces, north-east Vietnam with a total number not exceeding 250 individuals.  The forest block in Cao Ma Po, Ta Van and Tung Vai Communes of Quan Ba District, Ha Giang Province (the Cao - Ta - Tung forest) harbors the second largest population of Tonkin Snub-nosed Monkey. This population was estimated to be conisted of about 30–35 individuals in 2007.  However, it faces a number of serious threats (wildlife hunting, habitat degradation by widespread forest farming of Tsao-ko cardamom plant, etc.) that may lead the population to be extinct in near future. The population was reduced to 15–21 individuals in 2016 due to these threats. In 2017–2018, we conducted a study to identify a priority habitat area to establish the Quan Ba Tonkin Snub-nosed Monkey Conservation Area. The results of our study show that the distribution of  the Quan Ba Tonkin Snub-nosed Monkey  population is  confined to a small area (about 5,000 ha) belonging to the Theng Chu Phin, Dao Dan Chai, Ta Lay mountains, the Hill 754 and a forest patch along the Vietnam-China  border  from the Post 283  to Post 295. This area harbors the best forest of the Cao - Ta - Tung area. The forest covers 92.3% of the area, and only 7.7% of the area is a non-forest land. There are two types of forest: evergreen broad-leaved forest (50.0% of total area) and limestone evergreen broad-leaved forest (42.3%).  The evergreen broad-leaved forest has been degraded to medium and restoration status. Tsao-ko cardamom Amomum tsao-ko fields are widespread. The limestone evergreen broad-leaved forest of almost primary status remains in very steep slopes and limestone mountains. The Cao - Ta - Tung forest was designated as a watershed protection forest that allows farming of agricultural and medicinal plants inside the forest and the forest farming of Tsao-ko cardamom is widespread becoming the most serious threat to the long-term survival of the Tonkin Snub-nosed Monkey population. In order to ensure long-term survival of the Quan Ba Tonkin Snub-nosed Monkey population, the  area of the Theng Chu Pin, Dao Dai Chai, Ta Lay, Tung Lau mountains,  the Hill 754 and a forest patch along the Vietnam-China border from the Post 283 to Post 285 must be designated as a special-use forest, i.e. to establish a Quan Ba Tonkin Snub-nosed Monkey Conservation Area. 

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

2020 ◽  
Author(s):  
Junsong Long ◽  
Mengping Tang ◽  
Guangsheng Chen
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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