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617 resultados encontrados para: TEMA: Bosques tropicales
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1.
Artículo
*En hemeroteca, SIBE-San Cristóbal
A flood plain palm forest in the Luquillo mountains of Puerto Rico five years after hurricane Hugo
Frangi, Jorge L. ; Lugo, Ariel E. (coaut.) ;
Contenido en: Biotropica Vol. 30, no. 3 (Septiembre 1998), p. 339-348 ISSN: 0006-3606
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
B8869 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-San Cristóbal
PDF

2.
Artículo
A multi-criterion index for the evaluation of local tropical forest conditions in Mexico
Ochoa Gaona, Susana ; Kampichler, Christian (coaut.) ; De Jong, Bernardus Hendricus Jozeph (coaut.) ; Hernández Daumás, Salvador (coaut.) ; Geissen Geissen, Violette (coaut.) ; Huerta Lwanga, Esperanza (coaut.) ;
Contenido en: Forest Ecology and Management Vol. 260, no. 5 (July 2010), p. 618–627 ISSN: 0378-1127
Bibliotecas: Villahermosa
Cerrar
SIBE Villahermosa
20789-30 (Disponible)
Disponibles para prestamo: 1
Resumen en: Inglés |
Resumen en inglés

Despite the ecological and economical importance of tropical forests they are currently affected byhuman activities, mainly through deforestation and selective extraction. With the aim of making an opportune diagnosis of the condition of forests, we developed an ecological index based on qualitative and semi-quantitative data, allowing a quick diagnosis in order to manage and conserve tropical forests. We evaluated 44 plots of tree vegetation, measuring canopy height, number of strata, tree cover, dominant trees, number of tree species, as well as the management of and damage to the forest. The data of each parameter was classified in categories of 3, 4 or 5, which were normalized between 0 and 1 for the worst and best characteristics, respectively. For the purpose of analysis, the average, a set of IF–THEN rules, and fuzzy logic were applied and as a result we obtained a model that measures the ecological condition of the tropical forests. The model has the advantages of having an ecological basis, allows data to be gathered quickly and is clear and easy to manage and interpret.Whenrunning the model, the value of each intermediate variable is displayed, thus allowing the detection of where necessary action is required to improve the ecological condition of the forest. We expect this index to contribute in evaluating the effectiveness of forest management and possibly offer advice for the short-term management and conservation of the remnants of tropical forests.


3.
Artículo
*En hemeroteca, SIBE-San Cristóbal
Aboveground biomass accumulation in a tropical wet forest in Nicaragua following a catastrophic hurricane disturbance
Mascaro, Joseph ; Perfecto, Ivette (coaut.) ; Barros, Oton (coaut.) ; Boucher, Douglas H. (coaut.) ; Granzow de la Cerda, Iñigo (coaut.) ;
Contenido en: Biotropica Vol. 37, no. 4 (December 2005), p. 600-608 ISSN: 0006-3606
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
B8693 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-San Cristóbal
PDF

4.
Tesis - Maestría
*Solicítelo con su bibliotecario/a
Aboveground biomass and carbon stock of a medium stature semievergreen tropical forest in the Intensive Carbon Monitoring Site of Calakmul-Campeche, Mexico / Sandra Lorena Santamaria Rojas
Santamaria Rojas, Sandra Lorena ; Lindner, André (first supervisor) ; Esparza Olguín, Ligia Guadalupe (second supervisor) ;
Dresden, Germany : Dresden University of Technology, Faculty of Environmental Sciences, Institute of International Forestry and Forest Products , 2014
Nota: Solicítelo con su bibliotecario/a
Índice | Resumen en: Inglés |
Resumen en inglés

The understanding of AGB and carbon stocks is important when trying to assess the role of tropical forest in the global carbon cycle as well as the performance of market-based mechanisms such as REDD+. The Peninsula of Yucatan has been described as a high biomass cluster among the tropical forest of South Mexico (De Jong, 2013). This study characterizes the living aboveground biomass and carbon stock of the Intensive Carbon Monitoring Site of Campeche-Mexico, by exploring AGB patterns across the different successional gradients and comparing the obtained estimates with previous studies in the region. The total AGB in the ICMS of Campeche was 163.59±3.63 Mg ha-1 while the estimated carbon stock was 81.79 Mg C ha-1. Successional gradients were strong predictors of biomass density showing an increasing pattern with age, with a difference of 84.41 Mg between the lowest biomass density for young secondary forest and the largest value for lowland mature forest. Diametric classes in turn were not a good predictor of AGB density. The biggest AGB density was for medium size trees (77.56±5.97 Mg ha-1) followed by large trees and the lowest density for small trees (37.36±5.66 Mg ha-1). Basal area by size classes was not a good predictor of AGB density as well. Even though the basal area of small trees (7.35 m2 ha-1) was significant larger (p < 0.0001) than the one of the large trees, AGB density was lower for small trees (37.36±5.66 Mg ha-1). In overall this study estimates were slightly lower than previous studies for the mature forest and significantly larger for secondary forest (Table 12). This analysis is novel in that it is the initial step to establish an intensive monitoring of carbon stocks and dynamics through the operation of an ICMS in the area of Calakmul, which ecologic conditions are of high interest.

Índice

List of Figures
List of Tables
Abbreviations
1. Introduction
1.1. Research objectives
2. Theoretical Framework
2.1. Live Aboveground Biomass (AGB) and carbon stock
2.2. Tree Allometry and AGB estimation
2.3. Field measurements for AGB estimation
2.4. Intensive Carbon Monitoring Sites (ICMS)
3. Methods
3.1. Study site
3.2. Sampling design
3.3. Clusters and sampling units design
3.4. Field measurements
3.5. Establishment of monitoring site
3.6. Data processing and analysis
3.6.1. Descriptive statistics
3.6.2. Quality control for well-represented species
3.7. Biomass estimation
3.8. Ratio estimators
3.9. Uncertainity
4. Results
4.1. Forest structure and composition
4.2. Basal Area and tree height
4.3. Successional stages
4.4. Forest disturbance
4.5. Wood Specific Gravity
4.6. Estimates of AGB and carbon stock
5. Discussion
5.1. AGB and carbon stock estimates
5.2. Successional stages
5.3. Wood Specific Gravity
5.4. Comparison with previous estimates
6. Conclusions
7. References
Appendices


5.
Tesis
Abundancia relativa, uso de hábitat y conocimiento popular de los strigiformes en un bosque húmedo tropical de Costa Rica / Paula Enríquez Rocha
Enríquez Rocha, Paula Lidia ;
Clasificación: T/598.97097286 / E5
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
ECO010006317 (Disponible)
Disponibles para prestamo: 1

6.
Revista
*En hemeroteca, SIBE-Villahermosa
Actualidad forestal tropical
Canberra, Australia : Organización Internacional de las Maderas Topicales , [1992-]
Bibliotecas: Villahermosa
Nota: En hemeroteca, SIBE-Villahermosa

7.
Libro
Agricultural technologies and tropical deforestation / edited by A. Angelsen and D. Kaimowitz
Angelsen, Arild (ed.) ; Kaimowitz, David (coed.) ;
Oxford, England : CAB International , c2001
Clasificación: 333.75137 / A4
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
SAA008194 (Disponible)
Disponibles para prestamo: 1

8.
Libro
Agroforestry and biodiversity conservation in tropical landscapes / edited by Götz Schroth, Gustavo A. B. da Fonseca, Celia A. Harvey, Claude Gascon, Heraldo L. Vasconcelos, and Anne Marie N. Izac
Schroth, Götz (ed.) ; Fonseca, Gustavo A. B. da (coed.) ; Harvey, Celia A. (coed.) ; Gascon, Claude, (coed.) ; Vasconcelos, Heraldo L. (coed.) ; Izac, Anne Marie N. (coed.) ;
Washington, DC : Island Press , 2004
Clasificación: 634.99 / A3
Bibliotecas: Campeche , San Cristóbal , Tapachula
Cerrar
SIBE Campeche
ECO040003862 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE San Cristóbal
ECO010006545 (Disponible)
Disponibles para prestamo: 1
Cerrar
SIBE Tapachula
ECO020008691 (Disponible)
Disponibles para prestamo: 1

9.
Artículo
PDF PDF
Resumen en: Inglés |
Resumen en inglés

This paper presents new equations for estimating above-ground biomass (AGB) and biomass components of seventeen forest species in the temperate forests of northwestern Mexico. A data set corresponding to 1336 destructively sampled oak and pine trees was used to fit the models. The generalized method of moments was used to simultaneously fit systems of equations for biomass components and AGB, to ensure additivity. In addition, the carbon content of each tree component was calculated by the dry combustion method, in a TOC analyser. The results of crossvalidation indicated that the fitted equations accounted for on average 91%, 82%, 83% and 76% of the observed variance in stem wood and stem bark, branch and foliage biomass, respectively, whereas the total AGB equations explained on average 93% of the total observed variance in AGB. The inclusion of total height (h) or diameter at breast height² × total height (d²h) as a predictor in the d-only based equations systems slightly improved estimates for stem wood, stem bark and total above-ground biomass, and greatly improved the estimates produced by the branch and foliage biomass equations. The predictive power of the proposed equations is higher than that of existing models for the study area. The fitted equations were used to estimate stand level AGB stocks from data on growing stock in 429 permanent sampling plots. Three machine-learning techniques were used to model the estimated stand level AGB and carbon contents; the selected models were used to map the AGB and carbon distributions in the study area, for which mean values of respectively 129.84 Mg ha-¹ and 63.80 Mg ha-¹ were obtained.


10.
Artículo
*En hemeroteca, SIBE-San Cristóbal
Allometric models for tree volume and total aboveground biomass in a tropical humid forest in Costa Rica
Segura, Milena ; Kanninen, Markku (coaut.) ;
Contenido en: Biotropica Vol. 37, no. 1 (march 2005), p. 2-8 ISSN: 0006-3606
Bibliotecas: San Cristóbal
Cerrar
SIBE San Cristóbal
B4571 (Disponible)
Disponibles para prestamo: 1
Nota: En hemeroteca, SIBE-San Cristóbal