Structure and dynamics in seasonal dry evergreen forest in northeastern Thailand

Bunyavejchewin, Sarayudh

doi:10.2307/3237303

Cited by 36 publications

(26 citation statements)

References 5 publications

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“…Regeneration of H. odorata is not continuous but needs a large disturbance, such as the falling of large trees 4 . In contrast, H. ferrea shows a reverse-J distribution with a peak at the smallest DBH class in dry evergreen forest near Sakaerat Silvicultural Research Station, suggesting that H. ferrea regenerates continuously 2 . In fact, a number of H. ferrea saplings survived in the dry evergreen forest despite there being few gaps in the forests 2 .…”

Section: Growth Performance Of the Seedlings And Their Habitatsmentioning

confidence: 91%

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

Sakai

Visaratana

Vacharangkura

et al. 2011

JARQ

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With the aim of establishing silvicultural techniques for tree species indigenous to monsoon tropical areas, we examined the survivorship and growth performance of three tree species under different light conditions. A 23-year-old Acacia mangium plantation was thinned in different ways: group selection thinning (gap creation, 50 m by 60 m in size), 2/3 random selection thinning based on basal area, 1/3 random selection thinning, and no thinning (control). The seedlings of Hopea odorata, H. ferrea, and Xylia xylocarpa var. kerrii were planted in each treatment area with three replications. At 30 months after planting, all species achieved a high survival rate (>90%) in all treatments, perhaps owing to intensive tending in the experimental plots. Both stem thickening and height growth were promoted as light conditions improved: most in the gap plot and least in the control plot for all species. H. ferrea grew to a large height even in dark conditions, suggesting that this species is considerably shade-tolerant. In contrast, X. xylocarpa var. kerrii was light-demanding owing to vigorous growth in the gap plot. The growth of the seedlings seemed to be associated with regeneration patterns in their natural habitats. The group selection thinning seemed to be most suitable for the growth of indigenous tree species.

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Section: Growth Performance Of the Seedlings And Their Habitatsmentioning

confidence: 91%

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

Sakai

Visaratana

Vacharangkura

et al. 2011

JARQ

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“…Dry evergreen forests as a closed-canopy evergreen forest type, with 25-30 m of mean canopy height, are widespread in the regions of Thailand that receive not more than 1,200 mm mean annual rainfall, with 4-6 dry months [27][28][29][30][31]. In Sri Lanka, dry evergreen forest is typical and a dominant vegetation type in the dry zone regions in the northern and eastern plains, which cover 80 percent of the island area [32][33][34].…”

Section: Distribution Of Tropical Dry Evergreen Forestmentioning

confidence: 99%

Tropical Dry Evergreen Forests of Peninsular India: Ecology and Conservation Significance

Parthasarathy

Selwyn

Udayakumar

2008

Tropical Conservation Science

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Tropical dry evergreen forests (TDEFs) occur as patches along the Coromandel coast of peninsular India. Investigations on plant biodiversity, bioresource values, and conservation status of 75 TDEF sites were carried out. A total of 149 woody plant species representing 102 trees, 47 lianas, and three native herbs were enumerated. Across 75 sites studied, species richness of woody plants ranged from 10 to 69 species. Physiognomically, evergreen species dominated the forest. Forest growth determined as girth increment ranged from 0.37 to 1.08 cm yr -1 for trees and 0.39 to 0.41 cm yr -1 for lianas. At the community level, seasonal flowering with unimodal dry season peak and year-round, bimodal fruiting pattern prevailed. A strong association between the qualitative reproductive traits and pollination and dispersal spectrum among the TDEF species has been demonstrated. In bioresource assessment, 150 medicinal plant species, used for treating more than 52 ailments, were documented. Site disturbance scores were obtained by assessing the various site disturbances such as site encroachment, resource extraction, grazing, fragmentation, weed invasion, etc. Conservation significance of the TDEF sites is emphasized in the light of restricted geographical distribution, moderate level of plant species diversity, representation of the unique forest type, high productivity, and bioresource potential. Restoring the disturbed sites with characteristic TDEF species, and revitalizing the cultural traditions associated with sacred groves by promoting awareness of the ecological and bioresource values of TDEFs, are recommended.

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“…Measurements of recruitment rate, mortality and population growth rate provide useful information to analyze factors affecting population dynamics and species coexistence (Nakashizuka, 1991a). Recently, many long-term studies in various types of forest ecosystems have been published (Manokaran and Kochummen, 1987;Nakashizuka 1991b;Namikawa, 1996;Tsuyuzaki and Haruki, 1996;Bunyavejchewin, 1999;Umeki and Kikuzawa, 1999;Woods, 2000a, b). However, there have been few long-term studies that investigated the spatial distribution of recruits and competition, in relation to species coexistence.…”

Section: Introductionmentioning

confidence: 99%

Stand structure and dynamics during a 16-year period in a sub-boreal conifer–hardwood mixed forest, northern Japan

Takahashi

Mitsuishi

Uemura

et al. 2003

Forest Ecology and Management

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The stand structure and regeneration dynamics of trees > 2.0 m in trunk height were studied during 1982-1998 in a 1-ha plot in a sub-boreal conifer-hardwood mixed forest, northern Japan, with a dense dwarf bamboo in the understory. Total density was low in 1982 (651 trees/ha), as compared with other forests in Japan. Quercus crispula was dominant in the upper canopy layer but their saplings were rare, while Acer mono, Acer japonicum and Abies sachalinensis were dominant in the sub-canopy and understory layers with many saplings. Mortality of each species was quite low during the census period (average 0.57%/yr), and there was no clear difference among the four species. The age structure of Quercus crispula was bell-shaped with a peak at ca. 200 years, while that of the other three species was weakly reverse-J shaped or a rough plateau. In addition, no recruits growing over a height of 2 m were observed during the census period in Quercus crispula, but many recruits of the other species were observed. These suggest that Quercus crispula depended on episodic disturbances for the persistence of its population. Recruits of the three species except for Quercus crispula did not concentrate in canopy gaps probably because of the dense dwarf bamboo cover there. They showed a negative spatial association with their own canopy trees, but a positive association with canopy trees of Quercus crispula. Most of the crowns of the three species (Abies sachalinensis and the two Acer spp.) were lower than that of overtopping Quercus crispula. These spatial associations between recruits and canopy trees brought about the competitive effect of Quercus crispula on the growth rates of other species and that of itself. However, the low mortality of trees taller than 2 m indicates that intra-and interspecific competition was not strong as a structuring force of the tree community. Our long-term study suggests that factors affecting recruitment (disturbances and dwarf bamboo in the forest floor) are more important for species coexistence than intra-and interspecific competition between trees taller than 2 m.

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Structure and dynamics in seasonal dry evergreen forest in northeastern Thailand

Cited by 36 publications

References 5 publications

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

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

Tropical Dry Evergreen Forests of Peninsular India: Ecology and Conservation Significance

Stand structure and dynamics during a 16-year period in a sub-boreal conifer–hardwood mixed forest, northern Japan

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