scholarly journals Growth Performances of Three Indigenous Tree Species Planted in a Mature Acacia mangium Plantation with Different Canopy Openness under a Tropical Monsoon Climate

2011 ◽  
Vol 45 (3) ◽  
pp. 317-326 ◽  
Author(s):  
Atsushi SAKAI ◽  
Thiti VISARATANA ◽  
Tosporn VACHARANGKURA ◽  
Moriyoshi ISHIZUKA ◽  
Shozo NAKAMURA
Keyword(s):  
Tree Species ◽  
Acacia Mangium ◽  
Canopy Openness ◽  
Monsoon Climate ◽  
Growth Performances ◽  
Indigenous Tree Species ◽  
Tropical Monsoon

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

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.

scholarly journals SPACING, PIT SIZE AND IRRIGATION INFLUENCE EARLY GROWTH PERFORMANCES OF FOREST TREE SPECIES

2021 ◽  
Vol 33 (1) ◽  
pp. 69-76
Author(s):  
N Mohammad ◽  
M Rajkumar ◽  
K Singh ◽  
NPS Nain ◽  
S Singh ◽  
...  
Keyword(s):  
Tree Species ◽  
Forest Tree ◽  
Early Growth ◽  
Forest Tree Species ◽  
Growth Performances

Growth performance of exotic and indigenous tree species in saline soils in Turkana, Kenya

2001 ◽  
Vol 47 (4) ◽  
pp. 499-511 ◽  
Author(s):  
Gufu Oba ◽  
Inger Nordal ◽  
Nils C. Stenseth ◽  
Jørn Stave ◽  
Charlotte S. Bjorå ◽  
...  
Keyword(s):  
Growth Performance ◽  
Tree Species ◽  
Saline Soils ◽  
Indigenous Tree Species

Daily inundation induced seasonal variation in the vertical distribution of soil water salinity in an estuarine mangrove forest under a tropical monsoon climate

2020 ◽  
Vol 35 (4) ◽  
pp. 638-649
Author(s):  
Akira Komiyama ◽  
Sasitorn Poungparn ◽  
Suthathip Umnouysin ◽  
Chadtip Rodtassana ◽  
Shogo Kato ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Vertical Distribution ◽  
Soil Water ◽  
Mangrove Forest ◽  
Water Salinity ◽  
Monsoon Climate ◽  
Tropical Monsoon ◽  
The Vertical Distribution

scholarly journals Natural Regeneration of Indigenous Tree Species in Broussonetia papyrifera Invaded Sites in Pra -Anum Forest Reserve

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
Moses Kwesi Yalley ◽  
Daniel Adusu ◽  
Abdul-Rahman Bunyamin ◽  
Isaac Okyere ◽  
Austin Asare
Keyword(s):  
Tree Species ◽  
Native Species ◽  
Negative Impact ◽  
Indigenous Species ◽  
Broussonetia Papyrifera ◽  
Forest Reserve ◽  
Adequate Knowledge ◽  
Randomized Design ◽  
Indigenous Tree Species ◽  
Control And Management

Broussonetia papyrifera invasion poses a serious threat to indigenous tree species in Ghana. Many conservation scientists therefore emphasize the need to control, manage, and possibly eradicate the species. However, attempts at control and management require adequate knowledge of its ecology and impact on invaded ecosystems. Employing a complete randomized design with twenty-four (24) 20 m × 20 m plots, 12 each on invaded and uninvaded sites, this study assesses the indigenous species regeneration potential under Broussonetia papyrifera-invaded sites in the Pra-Anum forest reserve. The study provides evidence of the negative impact of Broussonetia on the regenerative capacity of the reserve, as 335 seedlings per 4800 m2 distributed over 43 species were recorded on the uninvaded site compared to 156 seedlings per 4800 m2 distributed over 31 species on the invaded site. The study, however, observed some level of resilience of species belonging to the Ulmaceae and Lecythidaceae families, as they appeared fairly represented on the invaded site. Floristic diversity was also observed to be negatively impacted by Broussonetia invasion as mean Shannon and Simpson index values of 2.39 ± 0.71 and 0.89 ± 0.08 and 1.39 ± 0.24 and 0.64 ± 0.08 were recorded on the uninvaded and invaded sites, respectively. Furthermore, the Broussonetia invasion compromised the productivity of the forest ecosystem as 4.9 ± 1.61 mean economic tree species per 400 m2 plot were recorded on the invaded site compared to 13.8 ± 1.28 per 400 m2 plot on the uninvaded site. The study, therefore, concludes that Broussonetia invasion poses a serious threat to the integrity and productivity of the Pra-Anum forest reserve. Consequently, the study recommends the control of the spread of the species to protect the integrity of the Pra-Anum forest reserve. Also, restoration efforts in invaded areas of the reserve could consider the use of native species belonging to the Ulmaceae and Lecythidaceae families as they appear to be resilient to Broussonetia invasion.

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