scholarly journals The Diversity of Tropical Orchids of South Papua

2018 ◽  
Vol 5 (1) ◽  
pp. 1-9
Author(s):  
Verena Agustini ◽  
Suharyanto Suharyanto ◽  
Suharno Suharno ◽  
Lisiard Dimara ◽  
Chris D. Sembay
Keyword(s):  
Key Words ◽  
Sea Level ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
World Wide ◽  
Mountain Forests ◽  
Threatened Plants ◽  
Highland Area ◽  
Wide Range ◽  
Lowland Area

Papua is an area with very wide range, from lowland with altitude 0 m to highland area with 4730 m above sea level. Orchids species constitute the greater part of orchids diversity, which can grow on the bare branches of tall trees, or embedded in moss dripping in wet and cool mountain forests, as well as in the eternal shade of tropical rain forest. Numerous plants world-wide are threatened with extinction because of degradation or destruction of their habitat. Orchids are among the most threatened plants of all, especially when pressure from dealers and collectors aggravales the problems. South Papua is a lowland area with the elevation around 0-7 m above sea level, temperature 23-300 C, and 1500 m rainfall per year. The aims of these investigations were to explore the diversity of tropical orchids in South Papua. The exploration and collection were done in Asmat, Boven Digul, Mappi, and Merauke. The study found 22 genera and 75 species, mostly are epiphytic. Key words: orchids, exploration, diversity, South Papua.  

scholarly journals SEBARAN JENIS TENGKAWANG (Shorea Spp) di HUTAN TEMBAWANG DESA LABIAN KECAMATAN BATANG LUPAR KAPUAS HULU KALIMANTAN BARAT

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Riki Rikando ◽  
Siti Latifah ◽  
Togar Fernando Manurung
Keyword(s):  
Sea Level ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Large Scale ◽  
Survey Method ◽  
Research Results ◽  
Lowland Area

Kapuas Hulu Regency is lowland area of tropical rain forest which has many Dipterocarpaceae, one of  which is tengkawang ( Shorea spp). Forests in Kapuas Hulu are currently under threat because of the widespread exploitation of land  on a large scale without considering the balance of the ecosystem. Tembawang forest in Labian village has the potential of tengkawang trees which have not been known  to be distributed based on topography where is grows. The aim of this study is to obtian the distribution of tengkawang (Shorea spp) species based on topography in the tembawang forest in the Labian district of Kapuas hulu, Kalimantan. This research was conducted using a survey method with samples taken in census in six tembawang. The research results show that there are 4 species of tengkawang (Shorea spp). The disribution of tengkawang spesies based on the from of thopography of Shorea marcophylla Aston and Shorea seminis Slooten grew on the topografhy of the valley with a height of 0 - 87 meter above sea level and slope of 9% - 23 % in all tembawang spread in group closed to waterside and scattered clustered at the Shorea  pinanga Scheff  and Shorea stenoptera Bruck spread on slope in groups with a height of 60-70 meter above sea level. Keywords : distributions, dipterocarpaceae, tembawang, tengkawang

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 Description of the puparium of Cyphomyia aurifrons Wiedemann and Cyphomyia picta Schiner (Diptera, Stratiomyidae, Clitellariinae) from Ilha da Marambaia, Rio de Janeiro, Brazil

2004 ◽  
Vol 21 (1) ◽  
pp. 79-83 ◽  
Author(s):  
Roberto de Xerez ◽  
Gustavo Glória Viana ◽  
José Roberto Pujol-Luz
Keyword(s):  
Sea Level ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Rio De Janeiro ◽  
First Time

The puparia of Cyphomyia aurifrons Wiedemann, 1830, and Cyphomyia picta Schiner, 1868 are described for the first time. The larvae were collected under the bark of fallen trees in a tropical rain forest at Ilha da Marambaia, State of Rio de Janeiro, Brazil, (23º04'15"S, 43º53'59"W, sea level, approximately 42 Km²). Some biological notes are also presented.

scholarly journals KEANEKARAGAMAN DAN KELIMPAHAN JENIS LIANA (TUMBUHAN MEMANJAT) PADA HUTAN ALAM DI HUTAN PENDIDIKAN UNIVERSITAS HASANUDDIN

PERENNIAL ◽  
2009 ◽  
Vol 5 (1) ◽  
pp. 23 ◽  
Author(s):  
. Asrianny ◽  
. Marian ◽  
Ngakan Putu Oka
Keyword(s):  
Key Words ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Diversity Index ◽  
Common Species ◽  
Natural Forest ◽  
Forest Area ◽  
South Sulawesi ◽  
Evenness Index ◽  
Important Value Index

Liana is group of climbing species which is typical and characterize the tropical rain forest. This species have important value both ecologically and economically. However, data on this group on species in South Sulawesi, in particular in the Hasanuddin University Experimental Forest is not yet available.This study aimed to determine the diversity and abudance liana species present in the natural forest area of Hasanuddin University Experimental Forest. 15 plots was set in the order to observe the diversity and abudance of liana species. The data were analysed and presented interm of important value index, diversity index, abudance index, and evenness index. The results showed that there were various species of liana in which there were found 81 species, consist of 764 individuals. The most common species was Smilax sp, wich mostly claimb on Toona sureni, Buchanania arboreschense and Flacortia rucam as a host. Key words: diversity, abudance, liana, natural forest, Hasanuddin University Experimental Forest

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.

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