scholarly journals Dispersal and survival of juveniles of dominant tree species in a tropical rain forest of West Sumatra

Tropics ◽  
2007 ◽  
Vol 16 (3) ◽  
pp. 205-214 ◽  
Author(s):  
Erizal MUKHTAR ◽  
Fumito KOIKE
Keyword(s):  
Tree Species ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
West Sumatra

Soil environment and tree species diversity in tropical rain forest, West Sumatra, Indonesia

1998 ◽  
pp. 159-167 ◽  
Author(s):  
Daisuke Kubota ◽  
Tsugiyuki Masunaga ◽  
Hermansah ◽  
Azwar Rasyidin ◽  
Mitsuru Hotta ◽  
...  
Keyword(s):  
Species Diversity ◽  
Tree Species ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Tree Species Diversity ◽  
Soil Environment ◽  
West Sumatra

scholarly journals Soil Quality Characterization in Relation to Tree Species Diversity in Tropical Rain Forest, West Sumatra, Indonesia I. Comparison of two 1-ha plots.

Tropics ◽  
2000 ◽  
Vol 9 (2) ◽  
pp. 133-145 ◽  
Author(s):  
Daisuke KUBOTA ◽  
Tsugiyuki MASUNAGA ◽  
HERMANSAH ◽  
Mitsuru HOTTA ◽  
Toshiyuki WAKATSUKI
Keyword(s):  
Species Diversity ◽  
Soil Quality ◽  
Tree Species ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Tree Species Diversity ◽  
West Sumatra

scholarly journals LAJU DEKOMPOSISI SPESIES TANAMAN PENGAKUMULASI KALSIUM (CA) TINGGI DAN RENDAH DI DAERAH HUTAN HUJAN TROPIS SUPER BASAH PADANG SUMATRA BARAT

Jurnal Solum ◽  
2010 ◽  
Vol 7 (2) ◽  
pp. 80
Author(s):  
Hermansah Hermansah ◽  
Burhanudin Burhanudin ◽  
Sri Muhara
Keyword(s):  
Forest Ecosystem ◽  
Decomposition Rate ◽  
Tree Species ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Nutrient Release ◽  
Dry Mass ◽  
Slope Position ◽  
West Sumatra ◽  
Lower Slope

Study on decomposition rate of accumulating and excluder tree species of calsium (Ca) was conducted in a super wet tropical rain forest in Gadut Mountain Padang West Sumatra. The purposes of the study were : (1) to understand the rate of decomposition of biomass of Ca accumulating and excluder tree species, (2) to understand the effect of slope position (ridge, midle and lower slope) on decomposition rate within the study plot and (3) to understand the amount of nutrient release to soil ecosystem within certain period. The result of this study showed that the higher decompoisition rate among two species was Eugenia sp, as Ca accumlating tree species which grew at lower slope. Six months after decomposition, 1 ton dry biomass of Eugenia sp contributed 6,8 kg N, 0,4 kg P, 4,12 kg K, 38,76 kg Ca, and 2,1 kg Mg in to the soil. This amount might keep an equilibrium of soil nutreint balance to support the forest ecosystem. However, for one ton dry mass of Lithocarpus korthalsii sp as Ca exluder tree species, after 6 months decomposition, contributed 9,4 kg N, 1,1 kg P, 4,61 kg K, 3,76 kg Ca and 0,54 kg Mg. This indicates that Ca acumulating tree species contributed more Ca compared to Ca excluder tree species in this forest ecosystem. Keywords: Accumulating tree sp., exluder tree sp., decomposition rate, super wet and tropical rain forest.

La phénologie des arbres caducifoliés en forêt guyanaise (5° de latitude nord) : illustration d'un déterminisme à composantes endogène et exogène

1994 ◽  
Vol 72 (12) ◽  
pp. 1843-1857 ◽  
Author(s):  
Denis Loubry
Keyword(s):  
Key Words ◽  
Tree Species ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
French Guiana ◽  
Dry Season ◽  
Deciduous Tree ◽  
Leaf Fall

The French Guianan forest is an evergreen rain forest that contains approximately 100 deciduous tree species. The taxonomical distribution of the deciduous character is widely spread, and its presence or absence among some taxa, as well as its ancient origin, are arguments in favour of an endogenous origin. Leaf-fall periodicity was studied on a sample of 500 trees during a 2-year period. Periodicity is annual and seasonal. It is not correlated to rainfall and not linked to the occurrence of a dry season. It seems closely correlated to photoperiodical variations, even though those variations are weak (35 min at latitude 5°30′N). However, each tree has its own periodicity for leaves shedding. Therefore, there is a paradox between seasonality and individual periodicity of leaf fall. The existence of this paradox leads us to consider the hypothesis of an integration of endogenous and exogenous components in the determination of leaf-fall periodicity. Key words: deciduousness, French Guiana, phenology, photoperiodism, tree, tropical rain forest.

scholarly journals Spatial Distribution Pattern of Trees in Relation to Soil Edaphic Status in Tropical Rain Forest in West Sumatra, Indonesia II. Distribution of Non-Accumulating Trees.

Tropics ◽  
1998 ◽  
Vol 8 (1/2) ◽  
pp. 17-30 ◽  
Author(s):  
Tsugiyuki MASUNAGA ◽  
Daisuke KUBOTA ◽  
Usher WILLIAM ◽  
Mitsuru HOTTA ◽  
Yoshiaki SHINMURA ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Distribution Pattern ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Spatial Distribution Pattern ◽  
West Sumatra
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