Tropical Rain Forest Dynamics

Ecology ◽  
1986 ◽  
Vol 67 (4) ◽  
pp. 1114-1114
Author(s):  
Julie Slogan Denslow
Keyword(s):  
Forest Dynamics ◽  
Rain Forest ◽  
Tropical Rain Forest

Use of hemispherical photographs in forest ecology: measurement of gap size and radiation totals in a Bornean tropical rain forest

1993 ◽  
Vol 9 (2) ◽  
pp. 131-151 ◽  
Author(s):  
T. C. Whitmore ◽  
N. D. Brown ◽  
M. D. Swaine ◽  
D. Kennedy ◽  
C. I. Goodwin-Bailey ◽  
...  
Keyword(s):  
Forest Dynamics ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Forest Ecology ◽  
Canopy Openness ◽  
Gap Size ◽  
Active Radiation ◽  
Cloudy Weather ◽  
Hemispherical Photographs

ABSTRACTStudy of forest dynamics commonly requires measurement of canopy gap size. Hemispherical photographs can be analysed to provide various measures whereby gaps can be ranked in order of size. For ten artificial gaps in a Bornean tropical rain forest these measures were better correlated with gap microclimate than gap area measured physically on the ground. All these measures are however relative. For detailed (e.g. ecophysiological) studies the greater detail provided by absolute measures of photosynthetically active radiation (PAR) are required. Long term PAR values can be computed from hemiphots so long as measurements in the open nearby are available. Correction for cloudy weather is essential. Computed and measured PAR are compared for the test gaps. Both have inherent limits which means that below c. 15% canopy openness, differences in PAR between gaps cannot be assessed accurately.

scholarly journals EFFECT OF TIMBER HARVESTING ON DENSITY AND BASAL AREA OF LECYTHIDACEAE SPECIES IN THE EASTERN AMAZON

FLORESTA ◽  
2013 ◽  
Vol 44 (2) ◽  
pp. 229 ◽  
Author(s):  
Pamella Carolline Marques dos Reis ◽  
Leonardo Pequeno Reis ◽  
Ademir Roberto Ruschel ◽  
José Natalino Macedo Silva ◽  
João Olegário Pereira de Carvalho ◽  
...  
Keyword(s):  
Forest Management ◽  
Forest Dynamics ◽  
Natural Regeneration ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Positive Response ◽  
Basal Area ◽  
Timber Harvesting ◽  
Amazon Forest ◽  
Permanent Sample Plots

Dynamics of Lecythidaceae species were evaluated 13 years after logging in a dense tropical rain forest located in the municipality of Moju, Pará (02º 08’ 14’’ and 02º 12’ 26” S; 48º 47’ 34”S and 48º 48’ 14” W - SAD 69). Two hundred ha out of a 1,050 ha forest area were selectively logged for timber (23 m3 ha-1 harvested from 25 species) in 1997. Twenty-two permanent sample plots of 0.5 ha (11 ha sample area) were established and all trees with DBH ≥ 10 cm were measured and identified in 1995, 1998 and 2010. Density (trees ha-1) and basal area (m2 ha-1) of the species were evaluated in the three occasions. The opening of canopy caused by logging reduced the density and basal area of five species, but produced a positive response in nine species, boosting their natural regeneration and allowing the ingrowth of one species that was not present in the studied area in the beginning.Keywords: Forest dynamics; Tauari; forest management; Amazon Forest. ResumoEfeito da exploração de madeiras na densidade e área basal de espécies de Lecythidaceae no leste da Amazônia. Analisou-se a dinâmica de espécies de Lecythidaceae 13 anos após a exploração madeireira, em uma Floresta Ombrófila Densa no município de Moju, Pará (02º 08’ 14’’ e 02º 12’ 26” S; 48º 47’ 34”S e 48º 48’ 14” W - SAD 69). De uma área de floresta de 1.050 ha, foram selecionados 200 ha para exploração seletiva, em 1997, de 25 espécies comerciais madeireiras (intensidade de 23 m3 ha-1). Foram alocadas 22 parcelas permanentes de 0,5 ha, totalizando 11 ha amostrais, onde foram medidas todas as árvores com DAP≥ 10 cm, nos anos de 1995, 1998 e 2010. Analisou-se a densidade (árvores ha-1) e área basal (m2 ha-1) das espécies, nas três ocasiões. A abertura do dossel causada pela exploração reduziu a densidade e a área basal de cinco espécies, porém produziu impacto positivo em nove espécies, estimulando a sua regeneração natural e, inclusive, proporcionando o ingresso de uma espécie que não estava presente na área monitoradaPalavras-chave: Dinâmica da floresta; Tauarí; manejo florestal; Floresta Amazônica.

The Effects of a Tropical rain Forest Cover on Airborne Gamma-Ray Spectrometry

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Enio B. Pereira ◽  
Daniel J.R. Nordemann
Keyword(s):  
Rain Forest ◽  
Tropical Rain Forest ◽  
Forest Cover ◽  
Gamma Ray ◽  
Gamma Ray Spectrometry

Para solicitação de resumo, entrar em contato com editor-chefe ([email protected]). 

scholarly journals (5d RG-flow) trees in the tropical rain forest

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Marieke van Beest ◽  
Antoine Bourget ◽  
Julius Eckhard ◽  
Sakura Schäfer-Nameki
Keyword(s):  
Large Class ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Field Theories ◽  
Flavor Symmetry ◽  
Superconformal Field Theories ◽  
Hasse Diagrams ◽  
Flavor Symmetries ◽  
Rank 2 ◽  
Mass Deformation

Abstract 5d superconformal field theories (SCFTs) can be obtained from 6d SCFTs by circle compactification and mass deformation. Successive decoupling of hypermultiplet matter and RG-flow generates a decoupling tree of descendant 5d SCFTs. In this paper we determine the magnetic quivers and Hasse diagrams, that encode the Higgs branches of 5d SCFTs, for entire decoupling trees. Central to this undertaking is the approach in [1], which, starting from the generalized toric polygons (GTPs) dual to 5-brane webs/tropical curves, provides a systematic and succinct derivation of magnetic quivers and their Hasse diagrams. The decoupling in the GTP description is straightforward, and generalizes the standard flop transitions of curves in toric polygons. We apply this approach to a large class of 5d KK-theories, and compute the Higgs branches for their descendants. In particular we determine the decoupling tree for all rank 2 5d SCFTs. For each tree, we also identify the flavor symmetry algebras from the magnetic quivers, including non-simply-laced flavor symmetries.

Irradiance and Spectral Quality Affect Asian Tropical Rain Forest Tree Seedling Development

Ecology ◽  
1995 ◽  
Vol 77 (2) ◽  
pp. 568-580 ◽  
Author(s):  
David W. Lee ◽  
Krishnapillay Baskaran ◽  
Marzalina Mansor ◽  
Haris Mohamad ◽  
Son Kheong Yap
Keyword(s):  
Rain Forest ◽  
Tropical Rain Forest ◽  
Forest Tree ◽  
Seedling Development ◽  
Spectral Quality ◽  
Tree Seedling
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