scholarly journals Structure, Diversity, Threats and Conservation of Tropical Forests

10.5772/39286 ◽  
2012 ◽  
Author(s):  
Madhugiri Nageswara-Rao ◽  
Jaya R. ◽  
Padmini Sudarsh
Keyword(s):  
Tropical Forests ◽  
Structure Diversity

scholarly journals How individual species structure diversity in tropical forests

2007 ◽  
Vol 104 (48) ◽  
pp. 19029-19033 ◽  
Author(s):  
T. Wiegand ◽  
C. V. S. Gunatilleke ◽  
I. A. U. N. Gunatilleke ◽  
A. Huth
Keyword(s):  
Tropical Forests ◽  
Individual Species ◽  
Species Structure ◽  
Structure Diversity

scholarly journals Structure, diversity, and spatial patterns in a permanent plot of a high Restinga forest in Southeastern Brazil

2011 ◽  
Vol 25 (3) ◽  
pp. 633-645 ◽  
Author(s):  
Renato Augusto Ferreira de Lima ◽  
Alexandre Adalardo de Oliveira ◽  
Adriana Maria Zanforlin Martini ◽  
Daniela Sampaio ◽  
Vinícius Castro Souza ◽  
...  
Keyword(s):  
Tropical Forests ◽  
Basal Area ◽  
Permanent Plot ◽  
Size Class ◽  
Tree Density ◽  
Southeastern Brazil ◽  
White Sand ◽  
Younger Age ◽  
Sand Forest ◽  
Structure Diversity

We assessed the structure, diversity and distribution of tree species in a 10.24-ha permanent plot of high Restinga forest (HRF) in southeastern Brazil. We sampled 15,040 individuals belonging to 45 families, 87 genera and 116 species (density= 1,468 trees ha-1, and basal area= 28.0 m² ha-1). Mean richness was lower than other types of tropical forests and other HRFs that have been less intensively sampled, which is probably due to the younger age and hydromorphy of the soils in the study site. Tree density, basal area, species composition, and diversity all varied considerably depending on the size class considered. The studied plot had a density similar to other tropical forests but with a smaller basal area (fewer individuals > 60 cm in diameter), and higher density of smaller trees. Multi-stemmed individuals were not frequent (11% of the trees), though they were widespread among species (74% of the species). Spatial distribution was predominantly clumped, a pattern common to other types of tropical forests. Besides growing over white-sand soils, the PEIC plot and other white-sand forests of the world also had very similar patterns of community structure, richness and diversity. Therefore, we consider the HRF as a recognizable subtype of white-sand forest.

Tropical Forests

1921 ◽  
Vol 3 (3supp) ◽  
pp. 267-270
Author(s):  
Vernon Kellogg ◽  
R. M. Yerkes ◽  
H. E. Howe
Keyword(s):  
Tropical Forests

Valuing Tropical Forests

1995 ◽  
Author(s):  
Randall A. Kramer ◽  
narendra Sharma ◽  
Mohan Munasinghe
Keyword(s):  
Tropical Forests

FRUGIVORIA E DISPERSÃO DE SEMENTES POR PEIXES

2008 ◽  
Vol 1 (1) ◽  
pp. 7-18
Author(s):  
Luciane Lopes de Souza
Keyword(s):  
Sustainable Development ◽  
Seed Dispersal ◽  
Tropical Forests ◽  
Natural Regeneration ◽  
Main Species ◽  
Fishing Gears ◽  
Solimões River

Biotic or abiotic processes of seed dispersal are important for the maintenance of the diversity, and for the natural regeneration in tropical forests. Ichthyochory is one of the fundamental mechanisms for seed dispersal in flooded environments, as the “igapó” forests. A study on the ichthyochory of the igapós was conducted at Amanã Sustainable Development Reserve, in the middle Solimões river, from June 2002 to September 2004. Monthly samples of frugivorous fish were taken, with the main fishing gears used locally. Guts of 1,688 fish caught were examined. The main species were Myloplus rubripinnis (29.21%), Hemiodus immaculatus (18.96%),Colossoma macropom um (16.23%) and Mylossoma duriventre (16.05%). The diet was made of vegetables (fruits, leave and flowers), and animals (arthropods). 53.02% of all fish caught ingested fruits. The total number of intact seeds in the stomachs and intestines were 8,069 and 5,763 respectively. About 61.9% of the Brycon melanopterus (matrinchão), 46.34% of the Brycon amazonicus (mamuri) and 30.22% of M . rubripinnis (parum ) analysed had intact seeds in their guts. Seeds of Nectandra amazonum and Genipa spruceana ingested proved to be more viable than those non-ingested by fish. The high rates of frugivory, the presence of intact seeds in the guts of fish and the greater viability of ingested seeds all suggest that these animals are important seed dispersors in the “igapó” forests of Amanã Reserve.

Stufige Mischwälder im Unter-Thurgau | Stratified Mixed Forests in the Lower Thurgau

1999 ◽  
Vol 150 (7) ◽  
pp. 249-251
Author(s):  
Heinz Kuhn
Keyword(s):  
20Th Century ◽  
Forest Regeneration ◽  
Central Plateau ◽  
Intervention Intensity ◽  
Continuous Forest ◽  
Federal Institute ◽  
As Species ◽  
Landscape Research ◽  
Selection Forest ◽  
Structure Diversity

As in many parts of the Swiss Central Plateau, vast coppices with standards have grown in the region of Diessenhofen for centuries. While in other parts of the first decades of the 20th century the forests were converted to areas of forest regeneration species, the foresters of the Diessenhofen region altered numerous pillaged coppices with standards to a stratified continuous forest. The advantages of this form of management such as species and structure diversity and lower costs in comparison with the forest stratified by age are being presented. Each of the four foresters in the region has formed different stand images through his personal intervention intensity. There are different ways possible for achieving a continuous forest, in order to prove this, differences of managing a selection forest system are carried out by the four regional foresters. After decades of experience in tending stands established out of former coppices with standards, the approach of converting plenter forests from existing forests stratified by age to stratified continuous forests is experienced. The successes also encouraged the foresters of the neighbouring district Steckborn to do the same. This creative task is being accompanied scientifically by the WSL (Federal Institute of Forest, Snow and Landscape Research, Birmensdorf, Switzerland), which has established permanent observation areas. The steps in the previously intuitive procedure can, therefore, now be traced.

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