Dissolved organic carbon in water fluxes of Eucalyptus grandis plantations in northeastern Entre Ríos Province, Argentina
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| Format: | Artículo científico |
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Universidad Austral de Chile
2014
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| _version_ | 1876445706026221568 |
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| author | Natalia Tesón |
| author_facet | Natalia Tesón |
| contents | Dissolved organic carbon in water fluxes of Eucalyptus grandis plantations in northeastern Entre Ríos Province, Argentina Natalia Tesón Víctor H Conzonno Marcelo F Arturi Jorge L Frangi Agrociencias color water fluxes DOC concentration Entre Ríos (Argentina) Eucalyptus grandis plantations Water fluxes in tree plantations and other ecosystems carry dissolved organic carbon (DOC) provided by atmospheric inputs, autotrophic and heterotrophic metabolisms and from the lysis of dead material. These compounds may be colorless or provide a yellow-to-brown color to water and may also absorb visible light due to the presence of chromophores in the chemical structure. Concentration and composition of DOC and DOC annual flux in water pathways of a Eucalyptus grandis plantation were studied in Entre Ríos, Argentina. Samples of bulk precipitation, throughfall, stemflow, litter lixiviation, surface runoff and water table were analyzed for DOC concentration and color (optical density). Regression analyses for DOC concentration vs water fluxes intensity and for DOC concentration vs color were done. A DOC circulation model was calculated using available information on water budgets fluxes. Results showed that molecular features, values and range of DOC concentrations varied among fluxes, which may be explained by factors and processes influencing water gains and losses and by composition and availability of organic matter that may be dissolved in water in contact with biomass, necromass, soil and subsoil. Regression parameters from DOC concentration vs optical density were useful for DOC chemical composition analyses and interpretation of DOC changes. Annual circulation of DOC (in kg ha -1 year -1 ) showed that atmospheric contribution is low ( ca . 30), aboveground biomass lixiviation is about 3-4 times the atmospheric input (126.7 to 101.4), and inputs to mineral soil (374.4 to 348.0) came mainly (74 to 78 %) from litter lixiviation. 2014 artículo científico 0304-8799 https://www.redalyc.org/articulo.oa?id=173133052003 en http://www.redalyc.org/revista.oa?id=1731 Bosque application/pdf Universidad Austral de Chile Bosque (Chile) Num.3 Vol.35 |
| format | Artículo científico |
| id | redalyc_173133052003 |
| institution | Redalyc |
| language | en |
| publishDate | 2014 |
| publisher | Universidad Austral de Chile |
| spellingShingle | Dissolved organic carbon in water fluxes of Eucalyptus grandis plantations in northeastern Entre Ríos Province, Argentina Natalia Tesón Agrociencias color water fluxes DOC concentration Entre Ríos (Argentina) Eucalyptus grandis plantations Dissolved organic carbon in water fluxes of Eucalyptus grandis plantations in northeastern Entre Ríos Province, Argentina Natalia Tesón Víctor H Conzonno Marcelo F Arturi Jorge L Frangi Agrociencias color water fluxes DOC concentration Entre Ríos (Argentina) Eucalyptus grandis plantations Water fluxes in tree plantations and other ecosystems carry dissolved organic carbon (DOC) provided by atmospheric inputs, autotrophic and heterotrophic metabolisms and from the lysis of dead material. These compounds may be colorless or provide a yellow-to-brown color to water and may also absorb visible light due to the presence of chromophores in the chemical structure. Concentration and composition of DOC and DOC annual flux in water pathways of a Eucalyptus grandis plantation were studied in Entre Ríos, Argentina. Samples of bulk precipitation, throughfall, stemflow, litter lixiviation, surface runoff and water table were analyzed for DOC concentration and color (optical density). Regression analyses for DOC concentration vs water fluxes intensity and for DOC concentration vs color were done. A DOC circulation model was calculated using available information on water budgets fluxes. Results showed that molecular features, values and range of DOC concentrations varied among fluxes, which may be explained by factors and processes influencing water gains and losses and by composition and availability of organic matter that may be dissolved in water in contact with biomass, necromass, soil and subsoil. Regression parameters from DOC concentration vs optical density were useful for DOC chemical composition analyses and interpretation of DOC changes. Annual circulation of DOC (in kg ha -1 year -1 ) showed that atmospheric contribution is low ( ca . 30), aboveground biomass lixiviation is about 3-4 times the atmospheric input (126.7 to 101.4), and inputs to mineral soil (374.4 to 348.0) came mainly (74 to 78 %) from litter lixiviation. 2014 artículo científico 0304-8799 https://www.redalyc.org/articulo.oa?id=173133052003 en http://www.redalyc.org/revista.oa?id=1731 Bosque application/pdf Universidad Austral de Chile Bosque (Chile) Num.3 Vol.35 |
| title | Dissolved organic carbon in water fluxes of Eucalyptus grandis plantations in northeastern Entre Ríos Province, Argentina |
| topic | Agrociencias color water fluxes DOC concentration Entre Ríos (Argentina) Eucalyptus grandis plantations |
| url | https://www.redalyc.org/articulo.oa?id=173133052003 |