Detalhes bibliográficos
| Ano de defesa: |
2023 |
| Autor(a) principal: |
FERNANDEZ, MARIA LAURA QUEVEDO
 |
| Orientador(a): |
Dias, Andrea Nogueira
|
| Banca de defesa: |
Não Informado pela instituição |
| Tipo de documento: |
Tese
|
| Tipo de acesso: |
Acesso aberto |
| Idioma: |
por |
| Instituição de defesa: |
Universidade Estadual do Centro-Oeste
|
| Programa de Pós-Graduação: |
Programa de Pós-Graduação em Ciências Florestais (Doutorado)
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| Departamento: |
Unicentro::Departamento de Ciências Florestais
|
| País: |
Brasil
|
| Palavras-chave em Português: |
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| Palavras-chave em Inglês: |
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| Área do conhecimento CNPq: |
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| Link de acesso: |
http://tede.unicentro.br:8080/jspui/handle/jspui/2168
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Resumo: |
One of the main limitations for the implementation of forest restoration projects is the high costs, which is why economically attractive models are necessary for adoption by private landowners, who own most of the land in Paraguay. In these models, evaluating performance in the early stages is essential to prevent the failure of efforts and to select suitable species. In this regard, this study aimed to assess the initial performance and functional diversity of species and forest models applicable for the forest landscape restoration of the Itaipu Biosphere Reserve in Paraguay. The research, located in the district of Hernandarias, Paraguay, was designed with 30 species in a randomized block design installed in 2021, with five blocks and eight treatments (T), in which strips of conservation species in functional groups and harvest strips were combined, with differences only in the harvest strips, where T1 is referred to as Eucalyptus sp. for solid wood, T2: Eucalyptus sp. for biomass, T3: native species for solid wood, T4: native species for solid wood with green manure, T5: native species for biomass T6: native species for biomass with green manure, T7: Ilex paraguariensis, T8: native species for multiple uses. Monitoring was conducted over 18 months, collecting data on survival, dendrometric variables, and functional attributes. The results indicated that T2 showed a higher survival rate, while T7 in its harvest strip showed no survival. Six species were affected in the initial phase by low temperatures, and in four species, a decrease in survival probability was observed with increasing summer temperatures, accompanied by reduced precipitation. In terms of total height and neck diameter parameters, Eucalyptus sp. stood out, and in terms of canopy cover, Mimosa bimucronata var. bimucronata. Treatments 2 and 1 showed no statistical differences and had a higher mean canopy cover. The correlation between canopy cover and grass cover was negative. Overall, no species showed a good fit in the analysis models between neck diameter and height, and neck diameter and canopy area. In terms of functional attributes, Peltophorum dubium excelled in leaf area, and Annona emarginata had the largest specific leaf area. It was identified that an increase in specific leaf area is related to lower species survival. Treatment 8 exhibited higher functional richness, while treatments 5 and 6 showed higher functional evenness. Functional divergence was more pronounced in treatments 5, 6, and 7, and functional dispersion and Rao’s quadratic entropy stood out in treatment 2. In the weighted average of the community, it was observed that treatments composed of native species for solid wood had a larger leaf area, while the treatment with higher mortality had a higher weighted average of specific leaf area. These results provide valuable information for decision-making. The proper selection of species and forest models is essential for the success of these efforts, especially in the face of climate challenges. Furthermore, the analysis of functional diversity highlights the importance of considering the variety of ecological functions performed by species. These findings contribute significantly to the search for economically attractive solutions for restoration. |
