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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
14/02/1995 |
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Data da última atualização: |
06/04/2017 |
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Autoria: |
HAMILTON, S. K.; SIPPEL, S. J.; MELACK, J. M. |
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Afiliação: |
Department of Biological Sciences, University of California, Santa Barbara. |
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Título: |
The origin of "excess CO2" in waters of the Pantanal wetland of Brazil. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
In: SYMPOSIUM ON THE BIOGEOCHEMISTRY OF WETLANDS, 3., 1994, Orlando. Abstracts... Orlando: [s.n.] 1994. não paginado. |
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Idioma: |
Inglês |
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Conteúdo: |
The waters of the Pantanal, a large savanna floodplain, are characteristically low in dissolved O2 and high in dissolved CO2 and CH4. Analysis of dissolved gases in samples from throughout the region reveals that the waters tend to contain considerably more CO2 than can be accounted for by the observed consumption of dissolved O2. This "excess CO2" has several possible origins, including 1) anaerobic respiration or methanogenesis carried out by bacteria, 2) anaerobic metabolism in submerged organs of aquatic vascular plants, and 3) a greater tendency for dissolution of CO2 than O2 from the aerenchyma of submerged vascular plants. These alternative hypotheses are evaluated, drawing on additional measurements of the gas composition of sediment bubbles and plant stems. We conclude that the metabolism of emergent vascular plants is likely to be a major source of the "excess CO2". |
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Palavras-Chave: |
Analysis; Excess CO2; Wetland. |
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Thesagro: |
Água; Análise; Limnologia. |
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Thesaurus Nal: |
limnology; Pantanal; water. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01586naa a2200253 a 4500
001 1783815
005 2017-04-06
008 1994 bl --- 0-- u #d
100 1 $aHAMILTON, S. K.
245 $aThe origin of "excess CO2" in waters of the Pantanal wetland of Brazil.
260 $c1994
520 $aThe waters of the Pantanal, a large savanna floodplain, are characteristically low in dissolved O2 and high in dissolved CO2 and CH4. Analysis of dissolved gases in samples from throughout the region reveals that the waters tend to contain considerably more CO2 than can be accounted for by the observed consumption of dissolved O2. This "excess CO2" has several possible origins, including 1) anaerobic respiration or methanogenesis carried out by bacteria, 2) anaerobic metabolism in submerged organs of aquatic vascular plants, and 3) a greater tendency for dissolution of CO2 than O2 from the aerenchyma of submerged vascular plants. These alternative hypotheses are evaluated, drawing on additional measurements of the gas composition of sediment bubbles and plant stems. We conclude that the metabolism of emergent vascular plants is likely to be a major source of the "excess CO2".
650 $alimnology
650 $aPantanal
650 $awater
650 $aÁgua
650 $aAnálise
650 $aLimnologia
653 $aAnalysis
653 $aExcess CO2
653 $aWetland
700 1 $aSIPPEL, S. J.
700 1 $aMELACK, J. M.
773 $tIn: SYMPOSIUM ON THE BIOGEOCHEMISTRY OF WETLANDS, 3., 1994, Orlando. Abstracts... Orlando: [s.n.] 1994. não paginado.
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Registro original: |
Embrapa Pantanal (CPAP) |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
01/07/2013 |
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Data da última atualização: |
09/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
RIBEIRO, P. C. C.; PINHEIRO, L. C.; DOMINGUES, R.; FORZZA, R. C.; MACHADO, M. A.; VICCINI, L. F. |
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Afiliação: |
P. C. C. RIBEIRO, UFJF; L. C. PINHEIRO, UFJF; R. DOMINGUES, UFJF; R. C. FORZZA, JARDIM BOTÂNICO/RJ; MARCO ANTONIO MACHADO, CNPGL; L. F. VICCINI, UFJF. |
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Título: |
Genetic diversity of Vriesea cacuminis (Bromeliaceae): an endangered and endemic brazilian species. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Genetics and Molecular Research, v. 12, n. 2, p. 1934-1943, 2013. |
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DOI: |
https://doi.org/10.4238/2013.June.13.2 |
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Idioma: |
Inglês |
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Conteúdo: |
Data about the genetic structure can help to understand the evolutionary process of natural populations as well as to drive strategies of conservation. Vriesea cacuminis, an endemic Brazilian Bromeliad, has been found in 2 areas of Minas Gerais State. One is a legal preservation unit (Ibitipoca State Park) and the other an unprotected area (Serra Negra). The 2 areas belong to the Mantiqueira Mountain Range Complex; both are characterized by steep relief with high altitudes and by heterogenic vegetation formed by a mosaic of rocky fields and forest fragments. According to International Union for Conservation of Nature criteria, V. cacuminis is designated as "vulnerable". We examined the genetic variability and population structure of 70 individuals (3 populations) of V. cacuminis, using 16 ISSR markers. Although V. cacuminis is considered a rare species, the estimated genetic diversity was found to be relatively high (Shannon index = 0.33; percentage of polymorphic bands = 87%). The populations were found not to be structured (AMOVA test, ΦST = 0.16), probably due to the cross-breeding. Based on Bayesian analysis, this species includes one cluster containing the populations from Ibitipoca State Park and another cluster including the population from Serra Negra. This information will help determine strategies to maintain the genetic variability of these populations. Data about the genetic structure can help to understand the evolutionary process of natural populations as well as to drive strategies of conservation. Vriesea cacuminis, an endemic Brazilian Bromeliad, has been found in 2 areas of Minas Gerais State. One is a legal preservation unit (Ibitipoca State Park) and the other an unprotected area (Serra Negra). The 2 areas belong to the Mantiqueira Mountain Range Complex; both are characterized by steep relief with high altitudes and by heterogenic vegetation formed by a mosaic of rocky fields and forest fragments. According to International Union for Conservation of Nature criteria, V. cacuminis is designated as "vulnerable". We examined the genetic variability and population structure of 70 individuals (3 populations) of V. cacuminis, using 16 ISSR markers. Although V. cacuminis is considered a rare species, the estimated genetic diversity was found to be relatively high (Shannon index = 0.33; percentage of polymorphic bands = 87%). The populations were found not to be structured (AMOVA test, ΦST = 0.16), probably due to the cross-breeding. Based on Bayesian analysis, this species includes one cluster containing the populations from Ibitipoca State Park and another cluster including the population from Serra Negra. This information will help determine strategies to maintain the genetic variability of these populations. MenosData about the genetic structure can help to understand the evolutionary process of natural populations as well as to drive strategies of conservation. Vriesea cacuminis, an endemic Brazilian Bromeliad, has been found in 2 areas of Minas Gerais State. One is a legal preservation unit (Ibitipoca State Park) and the other an unprotected area (Serra Negra). The 2 areas belong to the Mantiqueira Mountain Range Complex; both are characterized by steep relief with high altitudes and by heterogenic vegetation formed by a mosaic of rocky fields and forest fragments. According to International Union for Conservation of Nature criteria, V. cacuminis is designated as "vulnerable". We examined the genetic variability and population structure of 70 individuals (3 populations) of V. cacuminis, using 16 ISSR markers. Although V. cacuminis is considered a rare species, the estimated genetic diversity was found to be relatively high (Shannon index = 0.33; percentage of polymorphic bands = 87%). The populations were found not to be structured (AMOVA test, ΦST = 0.16), probably due to the cross-breeding. Based on Bayesian analysis, this species includes one cluster containing the populations from Ibitipoca State Park and another cluster including the population from Serra Negra. This information will help determine strategies to maintain the genetic variability of these populations. Data about the genetic structure can help to understand the evolutionary process of natural populations as well ... Mostrar Tudo |
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Palavras-Chave: |
Estrutura genética; População natural. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/961000/1/Genetic-diversity-of-Vriesea-cacuminis.pdf
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Marc: |
LEADER 03476naa a2200217 a 4500
001 1961000
005 2024-02-09
008 2013 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.4238/2013.June.13.2$2DOI
100 1 $aRIBEIRO, P. C. C.
245 $aGenetic diversity of Vriesea cacuminis (Bromeliaceae)$ban endangered and endemic brazilian species.$h[electronic resource]
260 $c2013
520 $aData about the genetic structure can help to understand the evolutionary process of natural populations as well as to drive strategies of conservation. Vriesea cacuminis, an endemic Brazilian Bromeliad, has been found in 2 areas of Minas Gerais State. One is a legal preservation unit (Ibitipoca State Park) and the other an unprotected area (Serra Negra). The 2 areas belong to the Mantiqueira Mountain Range Complex; both are characterized by steep relief with high altitudes and by heterogenic vegetation formed by a mosaic of rocky fields and forest fragments. According to International Union for Conservation of Nature criteria, V. cacuminis is designated as "vulnerable". We examined the genetic variability and population structure of 70 individuals (3 populations) of V. cacuminis, using 16 ISSR markers. Although V. cacuminis is considered a rare species, the estimated genetic diversity was found to be relatively high (Shannon index = 0.33; percentage of polymorphic bands = 87%). The populations were found not to be structured (AMOVA test, ΦST = 0.16), probably due to the cross-breeding. Based on Bayesian analysis, this species includes one cluster containing the populations from Ibitipoca State Park and another cluster including the population from Serra Negra. This information will help determine strategies to maintain the genetic variability of these populations. Data about the genetic structure can help to understand the evolutionary process of natural populations as well as to drive strategies of conservation. Vriesea cacuminis, an endemic Brazilian Bromeliad, has been found in 2 areas of Minas Gerais State. One is a legal preservation unit (Ibitipoca State Park) and the other an unprotected area (Serra Negra). The 2 areas belong to the Mantiqueira Mountain Range Complex; both are characterized by steep relief with high altitudes and by heterogenic vegetation formed by a mosaic of rocky fields and forest fragments. According to International Union for Conservation of Nature criteria, V. cacuminis is designated as "vulnerable". We examined the genetic variability and population structure of 70 individuals (3 populations) of V. cacuminis, using 16 ISSR markers. Although V. cacuminis is considered a rare species, the estimated genetic diversity was found to be relatively high (Shannon index = 0.33; percentage of polymorphic bands = 87%). The populations were found not to be structured (AMOVA test, ΦST = 0.16), probably due to the cross-breeding. Based on Bayesian analysis, this species includes one cluster containing the populations from Ibitipoca State Park and another cluster including the population from Serra Negra. This information will help determine strategies to maintain the genetic variability of these populations.
653 $aEstrutura genética
653 $aPopulação natural
700 1 $aPINHEIRO, L. C.
700 1 $aDOMINGUES, R.
700 1 $aFORZZA, R. C.
700 1 $aMACHADO, M. A.
700 1 $aVICCINI, L. F.
773 $tGenetics and Molecular Research$gv. 12, n. 2, p. 1934-1943, 2013.
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Embrapa Gado de Leite (CNPGL) |
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