Abstract
Natural regeneration plays a crucial role in maintaining tropical forest ecosystems and ensuring the sustainable management of valuable timber species in the Congo Basin. This study focuses on the status of the natural regeneration of Guibourtia demeusei in the tropical forest of Yangambi.Was conducted in the forest areas of the Central Basin, within the Yangambi Biosphere Reserve, located in the Isangi district, Democratic Republic of Congo. The objective was to assess the dynamics of natural regeneration of Guibourtia demeusei in the natural forests of Yangambi by quantifying the abundance of seedlings originating from selected seed trees and by analyzing the relationship between the dendrometric characteristics of these trees and regeneration success under forest cover. A total of six one-hectare plots were established in Yangambi, within which seedlings of different height classes were measured and their x and y coordinates recorded. Each of the six plots contained one seed tree, except plots 3, 5, and 6. In total, 916 seedlings were recorded in Yangambi, corresponding to a density of 152.6 stems/ha. The S1 height class had the highest number of individuals (491 stems across the six hectares, i.e., 81.8 stems/ha) compared to the other classes, and their number decreased as individual size increased. A strong positive correlation (r ≈ 0.95) was observed between the number of seed trees and seedling density. Likewise, a moderate negative correlation (r ≈ -0.58) was found between diameter at breast height (DBH) and seedling density. A moderate negative correlation was also observed between the number of seed trees and DBH (r = -0.66), although it was not statistically significant. In conclusion, the natural regeneration of Guibourtia demeusei remains fragile in the study area. Further research is therefore recommended to deepen the understanding of dispersal and regeneration mechanisms, with the aim of improving sustainable management practices in Congolese tropical forests.
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Claims 8
Claim · model-written summary
Seedling density of Guibourtia demeusei was 152.6 stems/ha across six one-hectare plots in Yangambi.
- Taxon
- Guibourtia demeuseiGuibourtia demeuseit0
- Outcome
- densitye1
- Value
- 152.6 stems/hae1
- Setting
- Yangambie1
Verbatim
t0“Guibourtia demeusei”
e1“In total, 916 seedlings were recorded in Yangambi, corresponding to a density of 152.6 stems/ha”
Claim · model-written summary
The S1 height class had the highest number of Guibourtia demeusei individuals (491 stems; 81.8 stems/ha) compared with the other height classes.
Verbatim
t0“Guibourtia demeusei”
e2“The S1 height class had the highest number of individuals (491 stems across the six hectares, i.e., 81.8 stems/ha) compared to the other classes”
Claim · model-written summary
The number of Guibourtia demeusei seedlings decreased as individual size increased.
- Taxon
- Guibourtia demeuseiGuibourtia demeuseit0
- Outcome
- numbere3
- Direction
- decreasede3
- Qualifier
- as individual size increasede3
Verbatim
t0“Guibourtia demeusei”
e3“their number decreased as individual size increased”
Claim · model-written summary
A strong positive correlation (r ≈ 0.95) was observed between the number of seed trees and seedling density of Guibourtia demeusei.
Verbatim
t0“Guibourtia demeusei”
e4“A strong positive correlation (r ≈ 0.95) was observed between the number of seed trees and seedling density”
Claim · model-written summary
A moderate negative correlation (r ≈ -0.58) was found between DBH and seedling density of Guibourtia demeusei.
Verbatim
t0“Guibourtia demeusei”
e5“Likewise, a moderate negative correlation (r ≈ -0.58) was found between diameter at breast height (DBH) and seedling density”
Claim · model-written summary
A moderate negative correlation (r = -0.66) between the number of seed trees and DBH was not statistically significant.
Verbatim
t0“Guibourtia demeusei”
e6“A moderate negative correlation was also observed between the number of seed trees and DBH (r = -0.66), although it was not statistically significant”
Claim · model-written summary
The natural regeneration of Guibourtia demeusei is fragile in the study area.
- Taxon
- Guibourtia demeuseiGuibourtia demeuseit0
- Outcome
- natural regeneratione7
- Qualifier
- remains fragile in the study areae7
Verbatim
t0“Guibourtia demeusei”
e7“In conclusion, the natural regeneration of Guibourtia demeusei remains fragile in the study area”
Claim · model-written summary
Further research is recommended to deepen understanding of dispersal and regeneration mechanisms of Guibourtia demeusei.
- Taxon
- Guibourtia demeuseiGuibourtia demeuseit0
- Outcome
- dispersal and regeneration mechanismse7
Verbatim
t0“Guibourtia demeusei”
e7“Further research is therefore recommended to deepen the understanding of dispersal and regeneration mechanisms”