scholarly journals Scientific Results of the BRYOTROP Expedition to Zaire and Rwanda 2. The altitudinal zonation of the bryophytes on Mt. Kahuzi, Zaire

1994 ◽  
Vol 9 (1) ◽  
pp. 153-167 ◽  
Author(s):  
Jan-Peter Frahm
Keyword(s):  
Rain Forest ◽  
Tropical Rain Forest ◽  
Montane Forest ◽  
Tropical Montane Forest ◽  
Subalpine Forest ◽  
Altitudinal Zonation ◽  
Number Of Species ◽  
Ecological Parameters ◽  
Scientific Results ◽  
Different Altitudes

The altitudinal zonation of the tropical rain forest at Mt. Kahuzi has been studied using bryophytes. The study is based on floristic parameters such as the number of species per hectarplot in different altitudes and the calculation of floristic discontinuities extracted from and evluation of altitudinal ranges. The results are compared and correlated to ecological parameters, especially data on the phytomass of epiphytic bryophytes per m² and per hectare. Based on these data, the tropical rain forest is classified as submontane forest (-1500 m), lower tropical montane forest (1500-2000 m), upper tropical montane forest (2100-2800 m), and subalpine forest (2900-3200 m). Except for the terminology, the vegetation belts derived from bryophytes can be correlated with those presented in general vegetatioinal schemes for tropcial Africa.

scholarly journals The Passalidae (Coleoptera, Scarabaeoidea) from Bolivia, with the descriptions of three new species

ZooKeys ◽  
2019 ◽  
Vol 882 ◽  
pp. 51-85
Author(s):  
Larry Jiménez-Ferbans ◽  
Pedro Reyes-Castillo ◽  
Jack C. Schuster
Keyword(s):  
New Species ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
New Records ◽  
Montane Forest ◽  
Field Trip ◽  
Number Of Species ◽  
Systematic Exploration ◽  
Three New Species ◽  
Eleven Species

Employing data from literature, examination of specimens in collections, and a field trip, a list of the species of Passalidae from Bolivia is elaborated. A total of 38 species is reported, including new records of Passalus inca Zang, 1905 and P. lunaris (Kaup, 1871), and three new brachypterous species: Passalus bolivianussp. nov., P. canoisp. nov., and P. gonzalezaesp. nov. Most of the species (27) belongs to the Passalini tribe, especially to the genus Passalus Fabricius, 1792 (19 species); the Proculini tribe is represented by eleven species in three genera. The number of species of Bolivia is low and reflects the lack of a systematic exploration of this country; more surveys are needed, especially in ecosystems such as montane forest and tropical rain forest.

scholarly journals The Diversity of Lichens along Elevational Gradients in the Tropical Montane Forest of Selangor, Malaysia

2021 ◽  
Vol 50 (5) ◽  
pp. 1199-1209
Author(s):  
Azlan Abas ◽  
Laily Din
Keyword(s):  
Relative Humidity ◽  
Environmental Factors ◽  
Dominant Species ◽  
Montane Forest ◽  
Lichen Species ◽  
Tropical Montane Forest ◽  
Elevational Gradients ◽  
Additional Information ◽  
Lichen Diversity ◽  
Different Altitudes

This study aims to explore how lichen diversity, composition, and distribution vary with altitude, and environmental factors (temperature and relative humidity). The study was conducted in the forest of Gunung Bunga Buah, Selangor at five sites (different altitudes). Forty-four lichen species were identified. Their diversity, composition, and distribution correlated significantly with the altitude and environmental factors, increasing diversity at higher altitudes. Graphidaceae and Physciaceae species were present at all altitudes, and the dominant species changed according to altitude: Some Parmeliaceae species were found only at higher altitudes (601-1430 m) while Chrysothrix xanthina and a few Physciaceae species were present only at lower altitudes (0-600 m). These findings will provide additional information about the lichens of the tropical montane forest of Malaysia to enhance knowledge on how to manage and sustain lichens in this type of forest.

Altitudinal zonation of rain forest on Bukit Belalong, Brunei: soils, forest structure and floristics

1997 ◽  
Vol 13 (2) ◽  
pp. 221-241 ◽  
Author(s):  
Colin A. Pendry ◽  
John Proctor
Keyword(s):  
Rain Forest ◽  
Basal Area ◽  
Tree Height ◽  
Montane Forest ◽  
Tree Density ◽  
Chemical Analyses ◽  
Lowland Rain Forest ◽  
Altitudinal Zonation ◽  
Maximum Tree Height ◽  
Number Of Individuals

ABSTRACTBukit Belalong, Brunei, is a small mountain (913 m) of uniform shale lithology with continuous primary rain forest from its base to its summit. Three 0.25 ha plots were established at each of three altitudes (200, 500 and 850 m) to investigate the altitudinal zonation of the soils and the vegetation. One soil profile from each altitude is described and chemical analyses of the soils indicate that they are similar at all altitudes. In each plot all trees ≥10 cm dbh were measured and identified as far as possible. Maximum tree height was greatest at 200 m (60 m) and least at 850 m (33 m). Tree density (number of individuals ha−1) increased with altitude. The forest at 850 m was the most species- and family-rich, but since the ratio of species to individuals did not vary significantly among altitudes, the higher species richness is attributed partly to the larger number of trees sampled. The Dipterocarpaceae was the most important family in terms of basal area at all altitudes, but its proportion of basal area was much smaller at 850 m than at the other altitudes. The Dipterocarpaceae was the most diverse family at 200 m and 500 m, but at 850 m its diversity was exceeded by the Lauraceae, Myrtaceae and Euphorbiaceae and equalled by the Clusiaceae. The forests at 200 m and 500 m are classified as lowland rain forest and that at 850 m is classified as a lower montane forest.

scholarly journals The invention of biodiversity: social perspectives on the management of biological variety in Africa

Africa ◽  
1996 ◽  
Vol 66 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Jane Guyer ◽  
Paul Richards
Keyword(s):  
Genetic Diversity ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Social Perspectives ◽  
Number Of Species ◽  
Unknown Species ◽  
Object Of Study ◽  
Or Genes ◽  
Species Biodiversity

Biodiversity means, in its broadest sense, the variety of life. More specifically it can refer to the number of species, genetic diversity or the variety of environments in which species or genes are to be found. The concept is in some ways an odd one, since biodiversity is quantitative without necessarily being quantifiable. As an object of study biodiversity is a bit like an iceberg—most of it is hidden from view, and (like the underwater portion of an iceberg) indefinite in shape and extent. The notion of global species biodiversity is often expressed in the form (estimates vary): 1·5 million species known to science, 5 million (or 30 million) yet remaining to be discovered (Primack, 1993). The rider to this surprising formulation is that most of the unknown species are probably insects in the tropical rain forest.

Simulating forest dynamics of a tropical montane forest in South Ecuador

Erdkunde ◽  
2009 ◽  
Vol 63 (4) ◽  
pp. 347-364 ◽  
Author(s):  
Claudia Dislich ◽  
Sven Günter ◽  
Jürgen Homeier ◽  
Boris Schröder ◽  
Andreas Huth
Keyword(s):  
Forest Dynamics ◽  
Montane Forest ◽  
Tropical Montane 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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