Photosynthetic gas exchange in Eastern Amazonian primary rain forest and pasture ecosystems / (Registro n. 4097)
[ somente texto ]
| 000 -LEADER | |
|---|---|
| fixed length control field | 03135nam a2200253 a 4500 |
| 001 - CONTROL NUMBER | |
| control field | 0012347 |
| 003 - INDENTIFICADOR DO NÚMERO DE CONTROLE | |
| Campo de controle | BR-MnINPA |
| 005 - DATA E HORA DA ÚLTIMA INTERVENÇÃO | |
| Campo de controle | 20190416161704.0 |
| 008 - CAMPOS FIXOS DE DADOS - INFORMAÇÕES GERAIS | |
| fixed length control field | 141119s2005 bl|||||||||||||||||eng|u |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| CDD | 574.52642 |
| Edição CDD | 19 |
| 090 ## - NÚMERO DE CHAMADA | |
| Classificação | T 574.52642 |
| Cutter | D671p |
| 100 ## - ENTRADA PRINCIPAL - NOME PESSOAL | |
| Nome pessoal | Domingues, Tomas Ferreira |
| 245 ## - TÍTULO PRINCIPAL | |
| Título principal | Photosynthetic gas exchange in Eastern Amazonian primary rain forest and pasture ecosystems / |
| Indicação de responsabilidade | Tomas Ferreira Domingues. |
| 260 ## - IMPRENTA | |
| Data de publicação, distribuição, etc. | 2005. |
| 300 ## - DESCRIÇÃO FÍSICA | |
| Extensão | xiii, 111 f. |
| 502 ## - NOTA DE DISSERTAÇÃO OU TESE | |
| Nota de dissertação ou tese | Tese |
| Tipo de grau | (Ph.D.)- |
| Nome da Instituição onde se graduou | The University of Utah, |
| Ano em que se graduou | 2005 |
| 520 ## - NOTA DE RESUMO | |
| Nota de resumo | Tropical rain forest ecosystems are an important component of the global carbon cycle. Knowledge of how carbon moves into and out of this biome is needed in order to better understand the global carbon cycle. As in other terrestrial ecosystems, carbon fluxes between the tropical rain forest and the atmosphere depend on the interaction between climatic patterns and ecophysiological properties of the vegetation. This dissertation evaluates ecophysiological properties related to leaf-level photosynthetic gas exchange and their relationships with the environment. Although annual rates of precipitation are high in the Amazon, the eastern portion of the basin shows a marked reduction in precipitation from July to November. Yet, no clear influence of season was found over ecophysiological properties related to leaf-level gas exchange. While some species showed a significant decrease in carbon photosynthetic assimilation rates under saturating light during the dry season, others showed no significant changes or even increased assimilation rates during the dry season. Such patterns were similar for other parameters associated with photosynthetic gas exchange, indicating that season does not have a marked effect on the potential carbon assimilation on Amazonian primary forest and pasture ecosystems. The structure of the canopy in the primary forest ecosystem had a strong influence on gas exchange characteristics of plant species. The physical nature of forest canopies creates gradients of light availability, temperature, relative humidity and wind speed. Accordingly, parameters related to photosynthesis showed marked relationships with the relative position within the canopy profile where the leaves were located, indicating that photosynthetic characteristics were driven by environmental conditions. The response of plants to the environment follows basic physiological rules allowing different species to be grouped based on ecophysiological similarities, therefore reducing complexity of ecosystems with high species diversity. The ecophysiological parameters evaluated in this study were used to characterize six a priori plant functional groups. Significant differences were observed among the plant functional groups, indicating that the parameters evaluated were appropriate for ecophysiological characterization of the vegetation. |
| 650 0# - ASSUNTO - TERMO TÓPICO | |
| Cabeçalho tópico ou nome geográfico | Ciclo do carbono. |
| 650 0# - ASSUNTO - TERMO TÓPICO | |
| Cabeçalho tópico ou nome geográfico | Ecofisiologia vegetal. |
| 650 0# - ASSUNTO - TERMO TÓPICO | |
| Cabeçalho tópico ou nome geográfico | Ecologia florestal |
| Subdivisão geográfica | Amazônia. |
| 650 0# - ASSUNTO - TERMO TÓPICO | |
| Cabeçalho tópico ou nome geográfico | Fotossíntese. |
| 650 0# - ASSUNTO - TERMO TÓPICO | |
| Cabeçalho tópico ou nome geográfico | Troca gasosa em plantas |
| Subdivisão geral | Medição. |
| 942 ## - ENTRADA ADICIONAL (KOHA) | |
| Tipo de material | Tese |
| Source of classification or shelving scheme | |
| Item perdido | Não pode ser emprestado | Origem | Número de chamada | Tombo | Tipo de material |
|---|---|---|---|---|---|
| Biblioteca INPA | T 574.52642 D671p | 06-0101 | Livro |