Dynamics of the Amazon Forest biomass in response to water stress
| Autor: | Vieira, Luciana Cristina de Sousa |
|---|---|
| Přispěvatelé: | Brando, Paulo Monteiro, Costa, Marcos Heil, Soares Filho, Britaldo Silveira, Elmiro, Marcos Antonio Timbó |
| Jazyk: | portugalština |
| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | LOCUS Repositório Institucional da UFV Universidade Federal de Viçosa (UFV) instacron:UFV |
| Popis: | Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Several climate models predict more intense and frequent droughts in the Amazon region due to increased greenhouse gases in the atmosphere. Consequently, the carbon stocks of forests in the Amazon may be substantially reduced, since that severe droughts tend to i) increase the mortality and ii) reduce the growth of trees. The objective of this research was to quantify the carbon balance of forests in the Amazon after the events of 2010 and 2005 drought. To do so, we used the model ecosystem CARLUC (Carbon and Land- Use Change), which simulates the flow of carbon between the 14 different components of the forest (leaves, stems, roots, etc.). Forest and the atmosphere. In particular, we simulated carbon losses caused by droughts in 2005 and 2010 and evaluated the time to recovery of carbon stocks. The results showed a strong association between sites under water stress and those with substantial reductions (5.3 mg of above-ground biomass) in carbon stocks. The recovery period relating to drought of 2005 and 2010 for the entire Amazon basin was, on average, eight and ten years respectively. When we considered only the locations where drought was more severe (maximum cumulative deficit water |
| Databáze: | OpenAIRE |
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