Biomassa arbórea nas florestas alagadas ao longo do Rio Branco, Roraima
Amazonian forests are an important above and belowground carbon reservoir. They play an important role in both the sequestration of atmospheric carbon and storage of carbon as biomass. The aim of this study was to quantify the spatial variation of above ground tree live biomass and evaluate the effe...
| Autor principal: | Farias, Hugo Leonardo Sousa |
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| Grau: | Dissertação |
| Idioma: | por |
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Universidade Federal de Roraima
2022
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http://repositorio.ufrr.br:8080/jspui/handle/prefix/462 |
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oai:repositorio.ufrr.br:prefix-4622023-11-23T18:25:57Z Biomassa arbórea nas florestas alagadas ao longo do Rio Branco, Roraima Farias, Hugo Leonardo Sousa Castilho, Carolina Volkmer de http://lattes.cnpq.br/6221676502793400 Estrutura Inventário florestal Fatores ambientais Várzea Amazônia Forest structure Forest inventory Environmental factors Floodplain Amazon CNPQ::CIENCIAS BIOLOGICAS Amazonian forests are an important above and belowground carbon reservoir. They play an important role in both the sequestration of atmospheric carbon and storage of carbon as biomass. The aim of this study was to quantify the spatial variation of above ground tree live biomass and evaluate the effects of climatic and environmental predictors along ~400km of flooded forests in the middle and lower rio Branco (Roraima). Specifically, I related plot-based biomass estimates with (i) duration of flooding, (ii) length of the dry season, and (iii) texture and fertility of the soil. A total of 2.432 individuals with diameter at breast height (DBH) ≥ 10 cm where sampled in 54 long (250 meters) and narrow (4 meters) plots of 0.1 hectare. For each individual sampled, were also determined: total tree height and wood density. The above ground live biomass of trees was estimated by the average of three allometric models that consider DBH, wood density, and tree height. Palm biomass was estimated based on a single model that considers only the height of individuals. Biomass estimates presented a 10-fold variation, ranging from 21.5 to 245.15 Mg/ha. No relationship between biomass and climatic variables (mean annual rainfall and length of dry season) were observed. Environmental variables: soil (% clay) and the duration of the flood also did not explain the variation in tree biomass in the flooded forests of the rio Branco. These represent the first tree biomass estimates for the flooded forests of the rio Branco, and the large biomass variation observed in the plots suggest that local stochastic events, forest structure and floristic composition may be more important in explaining biomass variation than climatic and soil factors. As florestas tropicais amazônicas são um importante reservatório de carbono acima e abaixo do solo. Elas desempenham uma importante função tanto no sequestro do carbono atmosférico quanto no armazenamento desse carbono em forma de biomassa. O objetivo desse trabalho foi quantificar a variação espacial da biomassa arbórea viva e avaliar o efeito de variáveis climáticas e ambientais ao longo de cerca de 400 km de florestas alagadas no médio e baixo rio Branco. Especificamente, foi avaliado o efeito (i) da duração da inundação, (ii) do comprimento da estação seca e (iii) da textura e fertilidade do solo no estoque de biomassa acima do solo. Foram amostrados 2.432 indivíduos com Diâmetro à altura do Peito (DAP) ≥ 10 cm, distribuídos em 54 parcelas compridas (250 metros) e estreitas (4 metros) de 0,1 ha. Para cada indivíduo amostrado, além do DAP, foram determinadas a altura total e a densidade da madeira. A biomassa viva acima do solo das árvores foi estimada através da média de três modelos alométricos que consideram DAP, densidade da madeira e altura das árvores. A biomassa de palmeiras foi estimada com base em um único modelo que considera apenas a altura dos indivíduos. A biomassa variou de 21,5 a 245,15 Mg/ha. Não foi observada relação entre a biomassa e as variáveis climáticas (precipitação média anual e comprimento da estação seca). As variáveis ambientais: solo (% de argila) e a duração da inundação também não explicaram a variação da biomassa arbórea viva acima do solo nas florestas alagadas do rio Branco. Estes resultados representam as primeiras estimativas de biomassa arbórea para as florestas alagadas do rio Branco. A grande variação observada entre as parcelas sugere que eventos estocásticos locais, a estrutura da floresta e a composição florística podem ser mais importantes para explicar a variação da biomassa do que fatores climáticos e características do solo. Agência 1 2022-02-09T19:10:27Z 2022 2022-02-09T19:10:27Z 2014 Dissertação FARIAS, Hugo Leonardo Sousa. Biomassa arbórea nas florestas alagadas ao longo do Rio Branco, Roraima. 2014. 70f. Dissertação (Mestrado em Ciências Ambientais) - Programa de Pós-Graduação em Recursos Naturais, Universidade Federal de Roraima, Boa Vista, 2014. http://repositorio.ufrr.br:8080/jspui/handle/prefix/462 por Acesso Aberto Attribution-NonCommercial-ShareAlike 3.0 Brazil http://creativecommons.org/licenses/by-nc-sa/3.0/br/ Universidade Federal de Roraima Brasil PRPPG - Pró-reitoria de Pesquisa e Pós-Graduação PRONAT - Programa de Pós-Graduação em Recursos Naturais UFRR |
| institution |
Repositório Institucional - Universidade Federa de Roraima - UFRR |
| collection |
DSpace |
| language |
por |
| topic |
Estrutura Inventário florestal Fatores ambientais Várzea Amazônia Forest structure Forest inventory Environmental factors Floodplain Amazon CNPQ::CIENCIAS BIOLOGICAS |
| spellingShingle |
Estrutura Inventário florestal Fatores ambientais Várzea Amazônia Forest structure Forest inventory Environmental factors Floodplain Amazon CNPQ::CIENCIAS BIOLOGICAS Farias, Hugo Leonardo Sousa Biomassa arbórea nas florestas alagadas ao longo do Rio Branco, Roraima |
| topic_facet |
Estrutura Inventário florestal Fatores ambientais Várzea Amazônia Forest structure Forest inventory Environmental factors Floodplain Amazon CNPQ::CIENCIAS BIOLOGICAS |
| description |
Amazonian forests are an important above and belowground carbon reservoir. They play an important role in both the sequestration of atmospheric carbon and storage of carbon as biomass. The aim of this study was to quantify the spatial variation of above ground tree live biomass and evaluate the effects of climatic and environmental predictors along ~400km of flooded forests in the middle and lower rio Branco (Roraima). Specifically, I related plot-based biomass estimates with (i) duration of flooding, (ii) length of the dry season, and (iii) texture and fertility of the soil. A total of 2.432 individuals with diameter at breast height (DBH) ≥ 10 cm where sampled in 54 long (250 meters) and narrow (4 meters) plots of 0.1 hectare. For each individual sampled, were also determined: total tree height and wood density. The above ground live biomass of trees was estimated by the average of three allometric models that consider DBH, wood density, and tree height. Palm biomass was estimated based on a single model that considers only the height of individuals. Biomass estimates presented a 10-fold variation, ranging from 21.5 to 245.15 Mg/ha. No relationship between biomass and climatic variables (mean annual rainfall and length of dry season) were observed. Environmental variables: soil (% clay) and the duration of the flood also did not explain the variation in tree biomass in the flooded forests of the rio Branco. These represent the first tree biomass estimates for the flooded forests of the rio Branco, and the large biomass variation observed in the plots suggest that local stochastic events, forest structure and floristic composition may be more important in explaining biomass variation than climatic and soil factors. |
| author_additional |
Castilho, Carolina Volkmer de |
| author_additionalStr |
Castilho, Carolina Volkmer de |
| format |
Dissertação |
| author |
Farias, Hugo Leonardo Sousa |
| title |
Biomassa arbórea nas florestas alagadas ao longo do Rio Branco, Roraima |
| title_short |
Biomassa arbórea nas florestas alagadas ao longo do Rio Branco, Roraima |
| title_full |
Biomassa arbórea nas florestas alagadas ao longo do Rio Branco, Roraima |
| title_fullStr |
Biomassa arbórea nas florestas alagadas ao longo do Rio Branco, Roraima |
| title_full_unstemmed |
Biomassa arbórea nas florestas alagadas ao longo do Rio Branco, Roraima |
| title_sort |
biomassa arbórea nas florestas alagadas ao longo do rio branco, roraima |
| publisher |
Universidade Federal de Roraima |
| publishDate |
2022 |
| url |
http://repositorio.ufrr.br:8080/jspui/handle/prefix/462 |
| _version_ |
1787156612792713216 |
| score |
11.755432 |