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Research Article Open access CC BY 4.0

Altitudinal Changes in Species Diversity and Stand Structure of Tropical Forest, Vietnam

Tran Van Do, Osamu Kozan, Tran Minh Tuan

Annual Research & Review in Biology · pp. 156–165 · Published 26 Dec 2014

10.9734/ARRB/2015/14867

Abstract

Ba Vi National Park (BNP) is known as one of the first parks established in Vietnam and has been well preserved against human disturbances. A study was conducted to understand altitudinal changes and aspect differences of species diversity and stand structure in evergreen broadleaf forest in BNP. Twenty plots (40 m x 50 m), distributing between 130 and 1,195 m above sea level were used for stem census, which were equally established in both eastern and western aspects. All stems with diameter at breast height (DBH) ≥ 10 cm were identified to species and measured for DBH. Results indicated significant linear relationships between elevation and basal area (G), top canopy height, species density, Shannon diversity index, and Evenness. Elevation zone of > 1,000 m above sea level had highest species density, Shannon diversity index, Evenness, stem density, G, and top canopy height, which were significant higher than that in 500-1,000 m and < 500 m elevational zones. Species composition in BNP was different between eastern aspect and western aspect, and both aspects shared 86 species in total 219 species found. While, stand structure and species diversity were not significant different between two aspects.

Altitudinal zones Ba Vi National Park forest structure tree species diversity tropical forest

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