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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
22/02/2010 |
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Data da última atualização: |
16/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FORTINI, L. B.; BRUNA, E. M.; ZARIN, D. J.; VASCONCELOS, S. S.; MIRANDA, I. S. |
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Afiliação: |
LUCAS BERIO FORTINI, UNIVERSITY OF FLORIDA; EMILIO M. BRUNA, UNIVERSITY OF FLORIDA; DANIEL J. ZARIN, UNIVERSITY OF FLORIDA; STEEL SILVA VASCONCELOS, CPATU; IZILDINHA S. MIRANDA, UFRA. |
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Título: |
Altered resource availability and the population dynamics of tree species in Amazonian secondary forests. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Oecologia, Dec. 2009. |
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DOI: |
10.1007/s00442-009-1524-5 |
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Idioma: |
Inglês |
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Conteúdo: |
Despite research demonstrating that water and nutrient availability exert strong effects on multiple ecosystem processes in tropical forests, little is known about the effect of these factors on the demography and population dynamics of tropical trees. Over the course of 5 years, we monitored two common Amazonian secondary forest species?Lacistema pubescens and Myrcia sylvatica?in dry-season irrigation, litter-removal and control plots. We then evaluated the effects of altered water and nutrient availability on population demography and dynamics using matrix models and life table response experiments. Our results show that despite prolonged experimental manipulation of water and nutrient availability, there were nearly no consistent and unidirectional treatment effects on the demography of either species. The patterns and significance of observed treatment effects were largely dependent on cross-year variability not related to rainfall patterns, and disappeared once we pooled data across years. Furthermore, most of these transient treatment effects had little effect on population growth rates. Our results suggest that despite major experimental manipulations of water and nutrient availability?factors considered critical to the ecology of tropical pioneer tree species?autogenic light limitation appears to be the primary regulator of tree demography at early/mid successional stages. Indeed, the effects of light availability may completely override those of other factors thought to influence the successional development of Amazonian secondary forests. MenosDespite research demonstrating that water and nutrient availability exert strong effects on multiple ecosystem processes in tropical forests, little is known about the effect of these factors on the demography and population dynamics of tropical trees. Over the course of 5 years, we monitored two common Amazonian secondary forest species?Lacistema pubescens and Myrcia sylvatica?in dry-season irrigation, litter-removal and control plots. We then evaluated the effects of altered water and nutrient availability on population demography and dynamics using matrix models and life table response experiments. Our results show that despite prolonged experimental manipulation of water and nutrient availability, there were nearly no consistent and unidirectional treatment effects on the demography of either species. The patterns and significance of observed treatment effects were largely dependent on cross-year variability not related to rainfall patterns, and disappeared once we pooled data across years. Furthermore, most of these transient treatment effects had little effect on population growth rates. Our results suggest that despite major experimental manipulations of water and nutrient availability?factors considered critical to the ecology of tropical pioneer tree species?autogenic light limitation appears to be the primary regulator of tree demography at early/mid successional stages. Indeed, the effects of light availability may completely override those of other factors though... Mostrar Tudo |
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Palavras-Chave: |
Limitação de nutriente. |
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Thesagro: |
Floresta Secundaria. |
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Thesaurus Nal: |
Amazonia. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02221naa a2200217 a 4500
001 1658404
005 2022-11-16
008 2009 bl uuuu u00u1 u #d
024 7 $a10.1007/s00442-009-1524-5$2DOI
100 1 $aFORTINI, L. B.
245 $aAltered resource availability and the population dynamics of tree species in Amazonian secondary forests.$h[electronic resource]
260 $c2009
520 $aDespite research demonstrating that water and nutrient availability exert strong effects on multiple ecosystem processes in tropical forests, little is known about the effect of these factors on the demography and population dynamics of tropical trees. Over the course of 5 years, we monitored two common Amazonian secondary forest species?Lacistema pubescens and Myrcia sylvatica?in dry-season irrigation, litter-removal and control plots. We then evaluated the effects of altered water and nutrient availability on population demography and dynamics using matrix models and life table response experiments. Our results show that despite prolonged experimental manipulation of water and nutrient availability, there were nearly no consistent and unidirectional treatment effects on the demography of either species. The patterns and significance of observed treatment effects were largely dependent on cross-year variability not related to rainfall patterns, and disappeared once we pooled data across years. Furthermore, most of these transient treatment effects had little effect on population growth rates. Our results suggest that despite major experimental manipulations of water and nutrient availability?factors considered critical to the ecology of tropical pioneer tree species?autogenic light limitation appears to be the primary regulator of tree demography at early/mid successional stages. Indeed, the effects of light availability may completely override those of other factors thought to influence the successional development of Amazonian secondary forests.
650 $aAmazonia
650 $aFloresta Secundaria
653 $aLimitação de nutriente
700 1 $aBRUNA, E. M.
700 1 $aZARIN, D. J.
700 1 $aVASCONCELOS, S. S.
700 1 $aMIRANDA, I. S.
773 $tOecologia, Dec. 2009.
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Embrapa Amazônia Oriental (CPATU) |
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| 2. |  | ARAGÃO, D. V.; FORTINI, L. B.; MULKEY, S. S.; ZARIN, D. J.; ARAUJO, M. M.; CARVALHO, C. J. R. de. Correlation but no causation between leaf nitrogen and maximum assimilation: the role of drought and reproduction in gas exchange in an understory tropical plant Miconia ciliata (Melastomataceae). American Journal of Botany, v. 92, n. 3, p. 456-461, Mar. 2005.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 4. | | ZARIN, D. J.; MULKEY, S. S.; VASCONCELOS, S. S.; FORTINI, L. B.; CARVALHO, C. J. R.; OLIVEIRA, F. A. Moisture stress constrains carbon flux rates in an Eastern Amazonian regrowth forest. In: CONFERÊNCIA CIENTÍFICA INTERNACIONAL DO LBA, 2., 2002, Manaus. Resumos. Manaus: LBA, 2002. Não paginado.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| Registros recuperados : 4 | |
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