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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
06/01/2011 |
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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: |
SIDDIQUE, I.; VIEIRA, I. C. G.; SCHIMIDT, S.; LAMB, D.; CARVALHO, C. J. R. de; FIGUEIREDO, R. de O.; BLOMBERG, S.; DAVIDSON, E. A. |
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Afiliação: |
YLYAS SIDDIQUE, Universidade of Queensland; IMA CÉLIA GUIMARÃES VIEIRA, Museu Paraense Emílio Goeldi; SUSANE SCHIMIDT, University of Queesland; DAVID LAMB, University of Queensland; CLAUDIO JOSE REIS DE CARVALHO, CPATU; RICARDO DE OLIVEIRA FIGUEIREDO, CPATU; SOMON BLOMBERG, University of Quuensland; ERIC A. DAVIDSON, Woods Hole Research Center. |
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Título: |
Nitrogen and phosphorus additions negatively affect tree species diversity tropical forest regrowth trajectories. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Ecology, v. 91, n. 7, p. 2121-2131, 2010. |
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Idioma: |
Inglês |
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Conteúdo: |
Nutrient enrichment is increasingly affecting many tropical ecosystems, but there is no information on how this affects tree biodiversity. To examine dynamics in vegetation structure and tree species biomass and diversity, we annually remeasured tree species before and for six years after repeated additions of nitrogen (N) and phosphorus (P) in permanent plots of abandoned pasture in Amazonia. Nitrogen and, to a lesser extent, phosphorus addition shifted growth among woody species. Nitrogen stimulated growth of two common pioneer tree species and one common tree species adaptable to both high- and lowlight environments, while P stimulated growth only of the dominant pioneer tree Rollinia exsucca (Annonaceae). Overall, N or P addition reduced tree assemblage evenness and delayed tree species accrual over time, likely due to competitive monopolization of other resources by the few tree species responding to nutrient enrichment with enhanced establishment and/or growth rates. Absolute tree growth rates were elevated for two years after nutrient addition. However, nutrient-induced shifts in relative tree species growth and reduced assemblage evenness persisted for more than three years after nutrient addition, favoring two nutrientresponsive pioneers and one early-secondary tree species. Surprisingly, N þ P effects on tree biomass and species diversity were consistently weaker than N-only and P-only effects, because grass biomass increased dramatically in response to N þ P addition. The resulting intensi?ed competition probably prevented an expected positive N þ P synergy in the tree assemblage. Thus, N or P enrichment may favor unknown tree functional response types, reduce the diversity of coexisting species, and delay species accrual during structurally and functionally complex tropical rainforest secondary succession. MenosNutrient enrichment is increasingly affecting many tropical ecosystems, but there is no information on how this affects tree biodiversity. To examine dynamics in vegetation structure and tree species biomass and diversity, we annually remeasured tree species before and for six years after repeated additions of nitrogen (N) and phosphorus (P) in permanent plots of abandoned pasture in Amazonia. Nitrogen and, to a lesser extent, phosphorus addition shifted growth among woody species. Nitrogen stimulated growth of two common pioneer tree species and one common tree species adaptable to both high- and lowlight environments, while P stimulated growth only of the dominant pioneer tree Rollinia exsucca (Annonaceae). Overall, N or P addition reduced tree assemblage evenness and delayed tree species accrual over time, likely due to competitive monopolization of other resources by the few tree species responding to nutrient enrichment with enhanced establishment and/or growth rates. Absolute tree growth rates were elevated for two years after nutrient addition. However, nutrient-induced shifts in relative tree species growth and reduced assemblage evenness persisted for more than three years after nutrient addition, favoring two nutrientresponsive pioneers and one early-secondary tree species. Surprisingly, N þ P effects on tree biomass and species diversity were consistently weaker than N-only and P-only effects, because grass biomass increased dramatically in response to N þ P addit... Mostrar Tudo |
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Thesagro: |
Floresta tropical; Fósforo; Nitrogênio. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/24907/1/Nitrogen-claudio.pdf
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Marc: |
LEADER 02562naa a2200241 a 4500
001 1871754
005 2022-11-16
008 2010 bl uuuu u00u1 u #d
100 1 $aSIDDIQUE, I.
245 $aNitrogen and phosphorus additions negatively affect tree species diversity tropical forest regrowth trajectories.$h[electronic resource]
260 $c2010
520 $aNutrient enrichment is increasingly affecting many tropical ecosystems, but there is no information on how this affects tree biodiversity. To examine dynamics in vegetation structure and tree species biomass and diversity, we annually remeasured tree species before and for six years after repeated additions of nitrogen (N) and phosphorus (P) in permanent plots of abandoned pasture in Amazonia. Nitrogen and, to a lesser extent, phosphorus addition shifted growth among woody species. Nitrogen stimulated growth of two common pioneer tree species and one common tree species adaptable to both high- and lowlight environments, while P stimulated growth only of the dominant pioneer tree Rollinia exsucca (Annonaceae). Overall, N or P addition reduced tree assemblage evenness and delayed tree species accrual over time, likely due to competitive monopolization of other resources by the few tree species responding to nutrient enrichment with enhanced establishment and/or growth rates. Absolute tree growth rates were elevated for two years after nutrient addition. However, nutrient-induced shifts in relative tree species growth and reduced assemblage evenness persisted for more than three years after nutrient addition, favoring two nutrientresponsive pioneers and one early-secondary tree species. Surprisingly, N þ P effects on tree biomass and species diversity were consistently weaker than N-only and P-only effects, because grass biomass increased dramatically in response to N þ P addition. The resulting intensi?ed competition probably prevented an expected positive N þ P synergy in the tree assemblage. Thus, N or P enrichment may favor unknown tree functional response types, reduce the diversity of coexisting species, and delay species accrual during structurally and functionally complex tropical rainforest secondary succession.
650 $aFloresta tropical
650 $aFósforo
650 $aNitrogênio
700 1 $aVIEIRA, I. C. G.
700 1 $aSCHIMIDT, S.
700 1 $aLAMB, D.
700 1 $aCARVALHO, C. J. R. de
700 1 $aFIGUEIREDO, R. de O.
700 1 $aBLOMBERG, S.
700 1 $aDAVIDSON, E. A.
773 $tEcology$gv. 91, n. 7, p. 2121-2131, 2010.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
26/01/1996 |
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Data da última atualização: |
26/01/1996 |
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Autoria: |
OLIVEIRA, B. A. D. de. |
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Título: |
Contribuição ao estudo taxonomico das cianoficeas heterocistadas continentais do estado do Rio de Janeiro - Brasil. |
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Ano de publicação: |
1976 |
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Fonte/Imprenta: |
Rio de Janeiro: Universidade Federal do Rio de Janeiro, 1976. |
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Páginas: |
140p. |
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Série: |
Tese para Concurso de Livre-Docência. |
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Idioma: |
Português |
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Notas: |
Orientada por: Johanna Dobereiner. |
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Conteúdo: |
No presente trabalho, um levantamento preliminar das cianoficeas heterocistadas do Estado do Rio de Janeiro, compreenderam 18 espécies, das quais Anabaena sucinea D. Oliv. e espécie nova, e 14 são indicadas pela primeira vez para o referido Estado e também para o Brasil. As espécies são procedentes de diversos ambientes: água estagnada, córrego rápido, barrancos rochosos com excessiva umidade, solo de cultivo de arroz e outros, ambientes aéreo e um habitat especial em que ocorre simbiose com pteridofito. Das 18 espécies, onze foram estudadas em condições de cultivo em laboratório, com meio nutritivo sem nitrogênio. Colateralmente ao estudo taxonomico foram feitas observações ecológicas e biológicas relacionadas com a reprodução e desenvolvimento. Constitui resultado de nosso levantamento a seguinte lista de espécies: Anabaena azollae Strass., A. cylindrica Lemmer, A sucinea D. Oliv. sp. nov., A. laxa (Rabenhorst) A. Braun, A. variabilis var. ellipsospora Fritsch, Aulosira fertilissima Ghose, Cylindrospermum alatosporum Fritsch, Hapalosiphon brasiliensis Borge, H. welwitschii west et west, Nostoc humifusum Carm., N. muscorum Agardh, N. piscinale Kuetzing, Hostochopsis lobatus Wood, Scytonema Schimidlei De Toni, S. Hofmannii Agardh, Tolypothrix byssoidea (Hassal) Kirchner, T. tenuis (Kuetzing) J. Schmidt e Westiellopsis Iyengarii Bai. |
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Palavras-Chave: |
Algas; Brasil; Cianoficeas; Cyanophyta; Rio de Janeiro. |
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Thesagro: |
Água Doce; Taxonomia. |
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Thesaurus NAL: |
algae; Brazil; taxonomy. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02146nam a2200265 a 4500
001 1621434
005 1996-01-26
008 1976 bl uuuu m 00u1 u #d
100 1 $aOLIVEIRA, B. A. D. de
245 $aContribuição ao estudo taxonomico das cianoficeas heterocistadas continentais do estado do Rio de Janeiro - Brasil.
260 $aRio de Janeiro: Universidade Federal do Rio de Janeiro$c1976
300 $a140p.
490 $aTese para Concurso de Livre-Docência.
500 $aOrientada por: Johanna Dobereiner.
520 $aNo presente trabalho, um levantamento preliminar das cianoficeas heterocistadas do Estado do Rio de Janeiro, compreenderam 18 espécies, das quais Anabaena sucinea D. Oliv. e espécie nova, e 14 são indicadas pela primeira vez para o referido Estado e também para o Brasil. As espécies são procedentes de diversos ambientes: água estagnada, córrego rápido, barrancos rochosos com excessiva umidade, solo de cultivo de arroz e outros, ambientes aéreo e um habitat especial em que ocorre simbiose com pteridofito. Das 18 espécies, onze foram estudadas em condições de cultivo em laboratório, com meio nutritivo sem nitrogênio. Colateralmente ao estudo taxonomico foram feitas observações ecológicas e biológicas relacionadas com a reprodução e desenvolvimento. Constitui resultado de nosso levantamento a seguinte lista de espécies: Anabaena azollae Strass., A. cylindrica Lemmer, A sucinea D. Oliv. sp. nov., A. laxa (Rabenhorst) A. Braun, A. variabilis var. ellipsospora Fritsch, Aulosira fertilissima Ghose, Cylindrospermum alatosporum Fritsch, Hapalosiphon brasiliensis Borge, H. welwitschii west et west, Nostoc humifusum Carm., N. muscorum Agardh, N. piscinale Kuetzing, Hostochopsis lobatus Wood, Scytonema Schimidlei De Toni, S. Hofmannii Agardh, Tolypothrix byssoidea (Hassal) Kirchner, T. tenuis (Kuetzing) J. Schmidt e Westiellopsis Iyengarii Bai.
650 $aalgae
650 $aBrazil
650 $ataxonomy
650 $aÁgua Doce
650 $aTaxonomia
653 $aAlgas
653 $aBrasil
653 $aCianoficeas
653 $aCyanophyta
653 $aRio de Janeiro
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Embrapa Agrobiologia (CNPAB) |
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