Modelling the tree population dynamics of the most abundant species in a Nigerian tropical rain forest

1996 ◽  
Vol 89 (1-3) ◽  
pp. 175-181 ◽  
Author(s):  
J.S.A. Osho
Keyword(s):  
Population Dynamics ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Abundant Species ◽  
Tree Population

scholarly journals Strong habitat preference of a tropical rain forest tree does not imply large differences in population dynamics across habitats

2007 ◽  
Vol 95 (2) ◽  
pp. 332-342 ◽  
Author(s):  
TOSHIHIRO YAMADA ◽  
PIETER A. ZUIDEMA ◽  
AKIRA ITOH ◽  
TAKUO YAMAKURA ◽  
TATSUHIRO OHKUBO ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Habitat Preference ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Forest Tree

Effects of a litter-disturbing bird species on tree seedling germination and survival in an Australian tropical rain forest

1999 ◽  
Vol 15 (6) ◽  
pp. 737-749 ◽  
Author(s):  
Tad C. Theimer ◽  
Catherine A. Gehring
Keyword(s):  
Rain Forest ◽  
Tropical Rain Forest ◽  
Seedling Survival ◽  
Bird Species ◽  
Abundant Species ◽  
Spatial And Temporal Variation ◽  
Tree Seedling ◽  
Seedling Mortality ◽  
Litter Cover ◽  
Early Seedling

The spatial and temporal variation in litter disturbance by a medium-sized bird, the chowchilla (Orthonyx spaldingii Ramsay, Orthonychidae) was documented, and its potential impacts on tree seed germination and early seedling survival in an Australian tropical rain forest experimentally investigated. Chowchilla disturbances occurred on ridges, slopes and drainages in all four seasons surveyed. In some areas litter was completely turned over as frequently as every 5 wk. Tethered seeds exposed to disturbance were moved farther and experienced significantly greater variation in litter cover than those protected from disturbance. When seeds of two canopy trees were placed in litter environments simulating those created by chowchillas, the seeds of one species showed significant effects of litter treatment on germination while those of the other showed no significant effects. Seedling cohorts of four tree species were followed for 6 wk soon after germination and all showed higher survival in vertebrate exclosures. The two most abundant species suffered 68% and 35% mortality in six wks, with the majority of that unambiguously due to chowchillas. It is argued that litter-disturbing birds increase litter heterogeneity and significantly impact early seedling mortality. These effects could be important in maintaining evenness and diversity of the seedling community.

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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