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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
26/04/2004 |
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Data da última atualização: |
27/03/2017 |
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Autoria: |
WANTZEN, K. M.; MACHADO, F. de A.; VOSS, M.; BORISS, H.; JUNK, W. J. |
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Afiliação: |
Max-Planck-Institute of Limnology, Plon, Germany. Universidade Federal de Mato Grosso, Instituto de Biociencias, Cuiaba, MT, Brazil. Baltic Sea Research Institute, SeestraBe, Rostock, Germany. |
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Título: |
Seasonal isotopic shifts in fish of the Pantanal wetland, Brazil. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Aquatic Science, v.64, p.239-251, 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
Seasonal inundations shape the floodplain characteristics of the Pantanal, a large wetland in Central South America. In the first study combining stable carbon and nitrogen isotope analysis with classical stomach content analysis in this region, we investigated the influence of the annual inundation on diet and isotopic composition of floodplain fish. Apart from potential food items, 33 fish species from the Coqueiro lake were analyzed, 10 of which were present during both the wet and dry season 1999. A 13C and 15N plot of the floodplain ecosystem allowed us to assess a foodchain 0f 3-4 trophic levels. However, the wide overlap of nitrogen values suggested that the organisms act on trophic continua rather than on distinct levels. The foodweb was based mainly on C3-plant carbon. However, fish species capable of feeding on terrestrial invertebrates (e.g., Brycon microlepis) had 13C values above -25%, indicating 13-30% intake of C4-plant based carbon during the flooding period. The novel use of vector corrdinates and 2-dimensional ANOVA showed that the seasonal isotopic shifts of 13C and 15N were higly significant for some feeding guilds. 15N values increased from the wet to dry season in most fish species and these shifts were higly significant for omnivores (Astyanax bimaculatus, Triportheus nematurus, Tetragonopterus argenteus and Moenkhausia dichroura), and significant for invertivores (Gymnogeophagus balzanii and Poptella paraguayensis) and carnivores Serrasalmus spilopleura). Average carbon isotope ratios decreased at the same time in the herbivores (Methynnis mola: 3.4%) and detritivores (Psectrogaster curviventris: 5.3%), but they did nodt change in the hypostomaticx herbivore Sturisoma robustum. We explain these shifts by abundant and variable food sources during the inundation period and increasing carnivory and starvation during the dry season when the lake is confined to its central basin. Isotopic shifts between seasons were more prominent in less specialized species of omnivores, invertivores and some carnivores, whereas more specialized herbivores and detritivores appeared to be more inlfuenced by changes in the carbon isotope ratio of the diet affected by biogeochemical process such as respiration and methanogenesis. A general model for the interpretation of isotope data of floodplain fish considering different time-scales is given. MenosSeasonal inundations shape the floodplain characteristics of the Pantanal, a large wetland in Central South America. In the first study combining stable carbon and nitrogen isotope analysis with classical stomach content analysis in this region, we investigated the influence of the annual inundation on diet and isotopic composition of floodplain fish. Apart from potential food items, 33 fish species from the Coqueiro lake were analyzed, 10 of which were present during both the wet and dry season 1999. A 13C and 15N plot of the floodplain ecosystem allowed us to assess a foodchain 0f 3-4 trophic levels. However, the wide overlap of nitrogen values suggested that the organisms act on trophic continua rather than on distinct levels. The foodweb was based mainly on C3-plant carbon. However, fish species capable of feeding on terrestrial invertebrates (e.g., Brycon microlepis) had 13C values above -25%, indicating 13-30% intake of C4-plant based carbon during the flooding period. The novel use of vector corrdinates and 2-dimensional ANOVA showed that the seasonal isotopic shifts of 13C and 15N were higly significant for some feeding guilds. 15N values increased from the wet to dry season in most fish species and these shifts were higly significant for omnivores (Astyanax bimaculatus, Triportheus nematurus, Tetragonopterus argenteus and Moenkhausia dichroura), and significant for invertivores (Gymnogeophagus balzanii and Poptella paraguayensis) and carnivores Serrasalmus spilopleu... Mostrar Tudo |
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Palavras-Chave: |
America do Sul; Area alagada; Ciclo alimentar; Food web; Isotopo estavel; Sazonal; Seasonal floodplain; Stable isotope. |
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Thesagro: |
Análise de Dados; Peixe. |
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Thesaurus Nal: |
data analysis; fish; Pantanal; South America. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03232naa a2200337 a 4500
001 1794397
005 2017-03-27
008 2002 bl --- 0-- u #d
100 1 $aWANTZEN, K. M.
245 $aSeasonal isotopic shifts in fish of the Pantanal wetland, Brazil.
260 $c2002
520 $aSeasonal inundations shape the floodplain characteristics of the Pantanal, a large wetland in Central South America. In the first study combining stable carbon and nitrogen isotope analysis with classical stomach content analysis in this region, we investigated the influence of the annual inundation on diet and isotopic composition of floodplain fish. Apart from potential food items, 33 fish species from the Coqueiro lake were analyzed, 10 of which were present during both the wet and dry season 1999. A 13C and 15N plot of the floodplain ecosystem allowed us to assess a foodchain 0f 3-4 trophic levels. However, the wide overlap of nitrogen values suggested that the organisms act on trophic continua rather than on distinct levels. The foodweb was based mainly on C3-plant carbon. However, fish species capable of feeding on terrestrial invertebrates (e.g., Brycon microlepis) had 13C values above -25%, indicating 13-30% intake of C4-plant based carbon during the flooding period. The novel use of vector corrdinates and 2-dimensional ANOVA showed that the seasonal isotopic shifts of 13C and 15N were higly significant for some feeding guilds. 15N values increased from the wet to dry season in most fish species and these shifts were higly significant for omnivores (Astyanax bimaculatus, Triportheus nematurus, Tetragonopterus argenteus and Moenkhausia dichroura), and significant for invertivores (Gymnogeophagus balzanii and Poptella paraguayensis) and carnivores Serrasalmus spilopleura). Average carbon isotope ratios decreased at the same time in the herbivores (Methynnis mola: 3.4%) and detritivores (Psectrogaster curviventris: 5.3%), but they did nodt change in the hypostomaticx herbivore Sturisoma robustum. We explain these shifts by abundant and variable food sources during the inundation period and increasing carnivory and starvation during the dry season when the lake is confined to its central basin. Isotopic shifts between seasons were more prominent in less specialized species of omnivores, invertivores and some carnivores, whereas more specialized herbivores and detritivores appeared to be more inlfuenced by changes in the carbon isotope ratio of the diet affected by biogeochemical process such as respiration and methanogenesis. A general model for the interpretation of isotope data of floodplain fish considering different time-scales is given.
650 $adata analysis
650 $afish
650 $aPantanal
650 $aSouth America
650 $aAnálise de Dados
650 $aPeixe
653 $aAmerica do Sul
653 $aArea alagada
653 $aCiclo alimentar
653 $aFood web
653 $aIsotopo estavel
653 $aSazonal
653 $aSeasonal floodplain
653 $aStable isotope
700 1 $aMACHADO, F. de A.
700 1 $aVOSS, M.
700 1 $aBORISS, H.
700 1 $aJUNK, W. J.
773 $tAquatic Science$gv.64, p.239-251, 2002.
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Registro original: |
Embrapa Pantanal (CPAP) |
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Registro Completo
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Biblioteca(s): |
Embrapa Tabuleiros Costeiros. |
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Data corrente: |
14/09/2012 |
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Data da última atualização: |
17/09/2012 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
CARVALHO, H. W. L. de; CARDOSO, M. J.; ROCHA, L. M. P. da; PACHECO, C. A. P.; OLIVEIRA, T. R. A. de; RODRIGUES, C. S.; GOMES, M. C. M.; CASTRO, C. R.; MENESES, M. C.; MENEZES, V. M. M. |
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Afiliação: |
HELIO WILSON LEMOS DE CARVALHO, CPATC; MILTON JOSE CARDOSO, CPAMN; LEONARDO MELO PEREIRA DA ROCHA, CNPMS; CLESO ANTONIO PATTO PACHECO, CNPMS; TÂMARA REBECCA ALBUQUERQUE DE OLIVEIRA, Estagiaria da Embrapa Tabuleiros Costeiros; CINTHIA SOUZA RODRIGUES, Estagiaria da Embrapa Tabuleiros Costeiros; MAITTE CAROLINA MOURA GOMES, Estagiaria da Embrapa Tabuleiros Costeiros; CAMILA RODRIGUES CASTRO, Estagiaria da Embrapa Tabuleiros Costeiros; MARCELLA CARVALHO MENESES, Estagiaria da Embrapa Tabuleiros Costeiros; VANESSA MARISA MIRANDA MENEZES, Estagiaria da Embrapa Tabuleiros Costeiros. |
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Título: |
Estabilidade de cultivares de milho na zona Agreste do Nordeste Brasileiro. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
In: CONGRESSO NACIONAL DE MILHO E SORGO, 29., 2012, Águas de Lindóia. Diversidade e inovações na era dos transgênicos: resumos expandidos. Campinas: Instituto Agronômico; Sete Lagoas: Associação Brasileira de Milho e Sorgo, 2012. |
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Páginas: |
p. 2492-2497 |
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Descrição Física: |
1 CD-ROM. |
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Idioma: |
Português |
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Palavras-Chave: |
Adaptabilidade; Interação cultivar x ambiente. |
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Thesagro: |
Produtividade; Zea Mays. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/66124/1/Estabilidade-cultivares.pdf
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Marc: |
LEADER 01022naa a2200277 a 4500
001 1933749
005 2012-09-17
008 2012 bl uuuu u00u1 u #d
100 1 $aCARVALHO, H. W. L. de
245 $aEstabilidade de cultivares de milho na zona Agreste do Nordeste Brasileiro.$h[electronic resource]
260 $c2012
300 $ap. 2492-2497$c1 CD-ROM.
650 $aProdutividade
650 $aZea Mays
653 $aAdaptabilidade
653 $aInteração cultivar x ambiente
700 1 $aCARDOSO, M. J.
700 1 $aROCHA, L. M. P. da
700 1 $aPACHECO, C. A. P.
700 1 $aOLIVEIRA, T. R. A. de
700 1 $aRODRIGUES, C. S.
700 1 $aGOMES, M. C. M.
700 1 $aCASTRO, C. R.
700 1 $aMENESES, M. C.
700 1 $aMENEZES, V. M. M.
773 $tIn: CONGRESSO NACIONAL DE MILHO E SORGO, 29., 2012, Águas de Lindóia. Diversidade e inovações na era dos transgênicos: resumos expandidos. Campinas: Instituto Agronômico; Sete Lagoas: Associação Brasileira de Milho e Sorgo, 2012.
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Embrapa Tabuleiros Costeiros (CPATC) |
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