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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
29/07/2009 |
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Data da última atualização: |
12/04/2010 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SONODA, K. C.; MATTHAEI, C. D.; TRIVINHO-STRIXINO, S. |
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Afiliação: |
Kathia C. Sonoda, CPAC; Christoph D. Matthei, University of Otago; Susana Trivinho-Strixino, Universidade Federal de São Carlos. |
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Título: |
Contrasting land uses affect Chironomidae communities in two Brazilian rivers. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Archiv für Hydrobiologie, Fundamental and Applied Limnology, v. 174, n. 2, p. 173-184, 2009. |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT: We investigated whether the conversion of riparian land use from indigenous forest to pasture influences Chironomidae (midge) community in two Brazilian rivers. Our study was conducted in the main rivers (São José do Dourados 6th order, Aguapéi 7th order) of two large catchments in the State of São Paulo. Both are dominated by agricultural ecosystems but retain substancial patches of native riparian forest. Replicated artificial substrates (baskets filled with coarse clay gravel) were exposed at one forested reach and one pasture reach in each river. Each respective land use had to be present for at least 500m along both river banks above and alongside the study reach, and the riparian forest at the forested reaches had to be at least 50m wide. Colonisation baskets were sampled after 44 days and all midge larvae sorted and identified to the lowest level possible (a total of 5,286 individuals belonging to 27 taxa). Land use affected midge communities, but not as expected. Densities of three dominant midge genera were significantly higher in pasture reaches than in forested reaches, possibly in response to moderate nutrient enrichment at the pasture reaches. Total density and taxon richness were similar across land uses. These results imply that land-use related changes in habitat conditions were not severe enough to represent a stressor (with negative effects) for the midge communities in the investigated large rivers, but rather acted as a subsidy, with mainly positive effects. MenosABSTRACT: We investigated whether the conversion of riparian land use from indigenous forest to pasture influences Chironomidae (midge) community in two Brazilian rivers. Our study was conducted in the main rivers (São José do Dourados 6th order, Aguapéi 7th order) of two large catchments in the State of São Paulo. Both are dominated by agricultural ecosystems but retain substancial patches of native riparian forest. Replicated artificial substrates (baskets filled with coarse clay gravel) were exposed at one forested reach and one pasture reach in each river. Each respective land use had to be present for at least 500m along both river banks above and alongside the study reach, and the riparian forest at the forested reaches had to be at least 50m wide. Colonisation baskets were sampled after 44 days and all midge larvae sorted and identified to the lowest level possible (a total of 5,286 individuals belonging to 27 taxa). Land use affected midge communities, but not as expected. Densities of three dominant midge genera were significantly higher in pasture reaches than in forested reaches, possibly in response to moderate nutrient enrichment at the pasture reaches. Total density and taxon richness were similar across land uses. These results imply that land-use related changes in habitat conditions were not severe enough to represent a stressor (with negative effects) for the midge communities in the investigated large rivers, but rather acted as a subsidy, with mainly posi... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Categoria alimentar; Estrutura comunitária; Inseto aquático. |
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Thesagro: |
Díptera; Rio; Uso da Terra. |
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Thesaurus Nal: |
Chironomidae. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02215naa a2200241 a 4500
001 1570654
005 2010-04-12
008 2009 bl --- 0-- u #d
100 1 $aSONODA, K. C.
245 $aContrasting land uses affect Chironomidae communities in two Brazilian rivers.
260 $c2009
520 $aABSTRACT: We investigated whether the conversion of riparian land use from indigenous forest to pasture influences Chironomidae (midge) community in two Brazilian rivers. Our study was conducted in the main rivers (São José do Dourados 6th order, Aguapéi 7th order) of two large catchments in the State of São Paulo. Both are dominated by agricultural ecosystems but retain substancial patches of native riparian forest. Replicated artificial substrates (baskets filled with coarse clay gravel) were exposed at one forested reach and one pasture reach in each river. Each respective land use had to be present for at least 500m along both river banks above and alongside the study reach, and the riparian forest at the forested reaches had to be at least 50m wide. Colonisation baskets were sampled after 44 days and all midge larvae sorted and identified to the lowest level possible (a total of 5,286 individuals belonging to 27 taxa). Land use affected midge communities, but not as expected. Densities of three dominant midge genera were significantly higher in pasture reaches than in forested reaches, possibly in response to moderate nutrient enrichment at the pasture reaches. Total density and taxon richness were similar across land uses. These results imply that land-use related changes in habitat conditions were not severe enough to represent a stressor (with negative effects) for the midge communities in the investigated large rivers, but rather acted as a subsidy, with mainly positive effects.
650 $aChironomidae
650 $aDíptera
650 $aRio
650 $aUso da Terra
653 $aBrasil
653 $aCategoria alimentar
653 $aEstrutura comunitária
653 $aInseto aquático
700 1 $aMATTHAEI, C. D.
700 1 $aTRIVINHO-STRIXINO, S.
773 $tArchiv für Hydrobiologie, Fundamental and Applied Limnology$gv. 174, n. 2, p. 173-184, 2009.
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Registro original: |
Embrapa Cerrados (CPAC) |
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Registro |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
11/12/2014 |
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Data da última atualização: |
05/04/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
RONDINA, A. B. L.; LESCANO, L. E. A. M.; ALVES, R. de A.; MATSUURA, E. M.; NOGUEIRA, M. A.; ZANGARO, W. |
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Afiliação: |
ARTUR BERBEL LIRIO RONDINA, UEL; LUIS EDUARDO AZEVEDO MARQUES LESCANO, UEL; RICARDO DE ALMEIDA ALVES, UEL; ENIO MASSAO MATSUURA; MARCO ANTONIO NOGUEIRA, CNPSO; WALDEMAR ZANGARO, UEL. |
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Título: |
Arbuscular mycorrhizas increase survival, precocity and flowering of herbaceous and shrubby species of early stages of tropical succession in pot cultivation. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Journal of Tropical Ecology, Cambridge, v. 30, n. 6, p. 599-614, Nov. 2014. |
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ISSN: |
0266-4674 |
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DOI: |
http://dx.doi.org/10.1017/S0266467414000509 |
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Idioma: |
Inglês |
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Conteúdo: |
Arbuscular mycorrhizal fungi (AMF) are an important biotic factor that influences tropical ecological succession and differently affect the woody species belonging to different successional stages. However, little is known about the influence of AMF on growth and reproduction of herbaceous and shrubby species of early phases of tropical succession. Thus, we assessed the effect of AMF on the development of 27 heliophilous herbaceous and shrubby tropical species. Plants were grown in greenhouse, in low- and high-fertility soils, with or without AMF, for 100 d. Most species grown with AMF exhibited high root infection intensity (80%), irrespective of soil fertility. In the low-fertility soil, non-mycorrhizal plants exhibited about 88% less shoot dry mass (SDM) than mycorrhizal plants, and AMF were crucial for the survival of most species. Non-mycorrhizal plants also had lower relative growth rate (RGR), total leaf area (TLA), leaf area expansion (LAE) and total root length (TRL). Six species flowered in the low-fertility soil, and flowering increased with AMF in one plant species and four species only flowered when mycorrhizal. In the high-fertility soil, non-mycorrhizal plants exhibited about 13% less SDM than mycorrhizal plants and also exhibited lower TLA, LAE, and nutrient concentrations in shoots. On the other hand, no major changes were observed for RGR, TRL and root dry mass for most of the species. Sixteen plant species flowered in the high-fertility soil, but most had earlier (11) and more abundant (10) flowering when mycorrhizal. Thus, AMF have different influences on the survival, growth and flowering of herbaceous and shrubby tropical species, depending on soil fertility: in low-fertility soil, AMF especially affect the survival, growth and flowering, whereas in high-fertility soil, AMF mainly influence the shoot nutrient concentrations and flowering. MenosArbuscular mycorrhizal fungi (AMF) are an important biotic factor that influences tropical ecological succession and differently affect the woody species belonging to different successional stages. However, little is known about the influence of AMF on growth and reproduction of herbaceous and shrubby species of early phases of tropical succession. Thus, we assessed the effect of AMF on the development of 27 heliophilous herbaceous and shrubby tropical species. Plants were grown in greenhouse, in low- and high-fertility soils, with or without AMF, for 100 d. Most species grown with AMF exhibited high root infection intensity (80%), irrespective of soil fertility. In the low-fertility soil, non-mycorrhizal plants exhibited about 88% less shoot dry mass (SDM) than mycorrhizal plants, and AMF were crucial for the survival of most species. Non-mycorrhizal plants also had lower relative growth rate (RGR), total leaf area (TLA), leaf area expansion (LAE) and total root length (TRL). Six species flowered in the low-fertility soil, and flowering increased with AMF in one plant species and four species only flowered when mycorrhizal. In the high-fertility soil, non-mycorrhizal plants exhibited about 13% less SDM than mycorrhizal plants and also exhibited lower TLA, LAE, and nutrient concentrations in shoots. On the other hand, no major changes were observed for RGR, TRL and root dry mass for most of the species. Sixteen plant species flowered in the high-fertility soil, but most had ... Mostrar Tudo |
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Palavras-Chave: |
Cultivo de plantas. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/113582/1/Arbuscular-mycorrhizas-increase-survival-precocity-and-owering-of-herbaceous-and-shrubby-species-of-early-stages-of-tropical-succession-in-pot-cultivation.pdf
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Marc: |
LEADER 02663naa a2200217 a 4500
001 2002337
005 2022-04-05
008 2014 bl uuuu u00u1 u #d
022 $a0266-4674
024 7 $ahttp://dx.doi.org/10.1017/S0266467414000509$2DOI
100 1 $aRONDINA, A. B. L.
245 $aArbuscular mycorrhizas increase survival, precocity and flowering of herbaceous and shrubby species of early stages of tropical succession in pot cultivation.$h[electronic resource]
260 $c2014
520 $aArbuscular mycorrhizal fungi (AMF) are an important biotic factor that influences tropical ecological succession and differently affect the woody species belonging to different successional stages. However, little is known about the influence of AMF on growth and reproduction of herbaceous and shrubby species of early phases of tropical succession. Thus, we assessed the effect of AMF on the development of 27 heliophilous herbaceous and shrubby tropical species. Plants were grown in greenhouse, in low- and high-fertility soils, with or without AMF, for 100 d. Most species grown with AMF exhibited high root infection intensity (80%), irrespective of soil fertility. In the low-fertility soil, non-mycorrhizal plants exhibited about 88% less shoot dry mass (SDM) than mycorrhizal plants, and AMF were crucial for the survival of most species. Non-mycorrhizal plants also had lower relative growth rate (RGR), total leaf area (TLA), leaf area expansion (LAE) and total root length (TRL). Six species flowered in the low-fertility soil, and flowering increased with AMF in one plant species and four species only flowered when mycorrhizal. In the high-fertility soil, non-mycorrhizal plants exhibited about 13% less SDM than mycorrhizal plants and also exhibited lower TLA, LAE, and nutrient concentrations in shoots. On the other hand, no major changes were observed for RGR, TRL and root dry mass for most of the species. Sixteen plant species flowered in the high-fertility soil, but most had earlier (11) and more abundant (10) flowering when mycorrhizal. Thus, AMF have different influences on the survival, growth and flowering of herbaceous and shrubby tropical species, depending on soil fertility: in low-fertility soil, AMF especially affect the survival, growth and flowering, whereas in high-fertility soil, AMF mainly influence the shoot nutrient concentrations and flowering.
653 $aCultivo de plantas
700 1 $aLESCANO, L. E. A. M.
700 1 $aALVES, R. de A.
700 1 $aMATSUURA, E. M.
700 1 $aNOGUEIRA, M. A.
700 1 $aZANGARO, W.
773 $tJournal of Tropical Ecology, Cambridge$gv. 30, n. 6, p. 599-614, Nov. 2014.
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