Forest Structure and Tree Species Diversity along an Altitudinal Gradient in Doi Inthanon National Park, Northern Thailand

This study investigates patterns of forest structure and tree species diversity in an anthropogenic palm grove and undisturbed areas at the seasonally-dry Pinkaití research station, in the Kayapó Indigenous Area. This site, managed by the Conservation International do Brasil, is the most southeastern site floristically surveyed in the Amazon until now. The secondary and a nearby undisturbed forest were sampled in a group of 52 floristic plots of 0.0625-ha (25x25-m) where all trees with DBH > 10 cm were measured and identified. The analyses were complemented with other two floristic plots of 1-ha (10x1000-m). The present study has shown that the Pinkaití, like other seasonally-dry forests, have great heterogeneity in forest structure and composition, associated with biotic characteristics of the most important tree species, natural disturbance and history of land-use. The palm grove, moderately dominated by the arborescent palm Attalea maripa (Aubl.) Mart., presented high tree species diversity and was floristically similar to undisturbed forests at the study site. It is discussed the importance of large arborescent palms for the seasonally-dry Amazon forests regeneration.

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Effect of forest structure on stand productivity in Central European forests depends on developmental stage and tree species diversity

Forest Ecology and Management ◽

10.1016/j.foreco.2018.12.024 ◽

2019 ◽

Vol 434 ◽

pp. 193-204 ◽

Cited By ~ 13

Author(s):

Laura Zeller ◽

Hans Pretzsch

Keyword(s):

Species Diversity ◽

Developmental Stage ◽

Forest Structure ◽

Tree Species ◽

Tree Species Diversity ◽

Central European ◽

European Forests ◽

Stand Productivity

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Tree Species Diversity in Community Managed and National Park Forests in the Mid-Hills of Central Nepal

Journal of Sustainable Forestry ◽

10.1080/10549811.2014.925811 ◽

2014 ◽

Vol 33 (8) ◽

pp. 796-813 ◽

Cited By ~ 7

Author(s):

Shiva Shankar Pandey ◽

Tek Narayan Maraseni ◽

Geoff Cockfield ◽

Karin Gerhard

Keyword(s):

Species Diversity ◽

Tree Species ◽

National Park ◽

Tree Species Diversity ◽

Central Nepal

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Assessment of tree species diversity, composition and structure of Medha Kachhapia National Park, Cox’s Bazar, Bangladesh

Asian Journal of Forestry ◽

10.13057/asianjfor/r040104 ◽

2020 ◽

Vol 4 (1) ◽

Author(s):

Mehraj Uddin ◽

Faqrul Islam Chowdhury ◽

Mohammed Kamal Hossain

Keyword(s):

Species Diversity ◽

Tree Species ◽

National Park ◽

Tree Diversity ◽

Acacia Auriculiformis ◽

Systematic Sampling ◽

Suitable Habitat ◽

Tree Species Diversity ◽

Composition And Structure ◽

Diversity Assessment

Abstract. Uddin M, Chowdhury FI, Hossain MK. 2020. Assessment of tree species diversity, composition and structure of Medha Kachhapia National Park, Cox’s Bazar, Bangladesh. Asian J For 4: 15-21. Tree species diversity assessment is considered an essential task to design robust conservation action plans of Protected Areas (PAs). Numerous researches have assessed tree diversity of different PAs of Bangladesh but tree diversity of Medha Kachhapia National Park (MKNP) is still unknown due to lack of research initiatives. It hinders forest managers of this PA to plan and implement conservation actions successfully. To this end, the study carried out a systematic sampling to ascertain composition, distribution, and diversity of tree species available at MKNP of Bangladesh. Findings revealed that representation of tree diversity of MKNP was very poor. Only 10 tree species representing 6 families were identified. Besides, MKNP was dominated by different Dipterocarpus spp. especially with Dipterocarpus costatus. Dominance in height and diameter classes and high Important Value Index (133.94) of D. costatus indicated that the tree might possess a suitable habitat in MKNP to maintain optimum dispersal, development, and growth. However, recent plantation activities with exotic Acacia auriculiformis and intensified human-induced disturbances might hamper its habitat. Thus, to conserve the habitat of D. costatus and remaining forest resources of MKNP, reforestation efforts should be shifted from exotic to native tree species, and community anthropogenic disturbances should be minimized.

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Tree species diversity along altitudinal gradient on southeastern and northwestern slopes of Mt. Huanggang, Wuyi Mountains, Fujian, China

Biodiversity Science ◽

10.17520/biods.2004008 ◽

2004 ◽

Vol 12 (1) ◽

pp. 63-74

Author(s):

ZHENG Cheng-Yang ◽

LIU Zeng-Li ◽

FANG Jing-Yun ◽

Keyword(s):

Species Diversity ◽

Tree Species ◽

Altitudinal Gradient ◽

Tree Species Diversity

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Quantitative assessment of tree species diversity of Himchari National Park (HNP) in Cox’s Bazar, Bangladesh

Asian Journal of Forestry ◽

10.13057/asianjfor/r050101 ◽

2020 ◽

Vol 5 (1) ◽

Author(s):

Saddam Hossen ◽

Mohammed Kamal Hossain ◽

Md. Akhter Hossain ◽

Mohammad Fahim Uddin

Keyword(s):

Species Diversity ◽

Tree Species ◽

National Park ◽

Quantitative Assessment ◽

Diversity Index ◽

Tectona Grandis ◽

The Other ◽

Acacia Auriculiformis ◽

Tree Species Diversity ◽

Gmelina Arborea

Abstract. Hossen S, Hossain MK, Hossain MA, Uddin MF. 2020. Quantitative assessment of tree species diversity of Himchari National Park (HNP) in Cox’s Bazar, Bangladesh. Asian J For 5: 1-7. The aim of the study was to assess the tree species composition, dominance, and quantitative distribution of tree species of Himchari National Park, Cox’s Bazar in Bangladesh through stratified random sampling method using sample plots (51) of 20 m x 20 m in size during the period of January 2017 to May 2018. A total of 961 stems (dbh ≥ 5 cm) of 88 tree species belonging to 64 genera and 37 families were enumerated where the stem density and basal area were 457.39 stem ha-1 and 10.979 m2 ha-1 respectively. On the other hand, the species diversity index, Shannon-Wiener’s diversity index, Shannon’s maximum diversity index, species evenness index, Margalef’s diversity index, and Simpson’s diversity index were 0.092, 3.733 ± 0.0071, 4.477, 0.834, 12.667 and 0.039 ± 0.0003 respectively. The highest Importance Value Index (IVI) was found for Acacia auriculiformis (23.23) followed by Tectona grandis (13.05), Gmelina arborea (12.66), Syzygium fruticosum (12.34), Casuarina equisetifolia (10.57), and Dipterocarpus turbinatus (10.55). The IVI value represents that Acacia auriculiformis possess highest dominance that is followed by Tectona grandis and Gmelina arborea. Percentage distribution of tree individuals into different height classes found in quadrats showed that height range 3 - <8 m had the highest (59.83%) percentage of tree individuals. On the other hand, different dbh (having dbh ≥5 cm) classes showed that most of the trees (65.97%) belonged to dbh range 5 - <15 cm. The outcome of present study suggests for the protection, sustainable management, and conservation of the tree resources of HNP, Cox’s Bazar, Bangladesh.

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Tree Regeneration Characteristics in Limestone Forests of the Cat Ba National Park, Vietnam

10.21203/rs.3.rs-244706/v1 ◽

2021 ◽

Author(s):

Van Vien Pham ◽

Christian Ammer ◽

Peter Annighöfer ◽

Steffi Heinrichs

Keyword(s):

Species Richness ◽

Species Diversity ◽

Tree Species ◽

National Park ◽

Forest Regeneration ◽

Tree Regeneration ◽

Conservation Strategy ◽

Tree Species Diversity ◽

Site Factor ◽

Overstory Tree

Abstract Background: Forest regeneration is decisive for future forest development and therefore of major concern to forest ecologists. The ability of overstory tree species to regenerate successfully is important for the preservation of tree species diversity and its associated flora and fauna. This study investigated forest regeneration dynamics in the Cat Ba National Park, a biodiversity hotpot in Vietnam. Data was collected from 90 sample plots and 450 sub-sample plots in the regional limestone forests. We compared species richness between the regeneration and overstory tree layers and examined the effect of environmental factors on the occurrence of regeneration. We developed five ratios to relate overstory and regeneration richness and diversity. Results: We found 97 tree species in the regeneration layer compared to 136 species in the overstory layer. Average regeneration density was 3,764 ± 1,601 per ha. Around 70% of the overstory tree species generated offspring. Of the tree species threatened according to The International Union for Conservation of Nature’s Red List of Threatened Species, only 36% were found in the regeneration layer. A principal component analysis provided evidence that the regeneration of tree species was linked to terrain factors (percentage of rock surface, slope) and soil properties (Cation exchange capacity, pH, humus content, soil moisture, soil depth). Contrary to our expectations, the prevailing light conditions (total site factor, gap fraction, openness, indirect site factor, direct site factor) had no influence on regeneration density and composition, probably due to the small gradient in light availability. Conclusion: We conclude that tree species richness in Cat Ba National Park appears to be declining at present. We suggest similar investigations in other biodiversity hotspots to learn whether the observed trend is a global phenomenon. In any case, a conservation strategy for the threatened tree species in the Cat Ba National Park needs to be developed if tree species diversity is to be maintained.

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