Influence of hydrological pathways on dissolved organic carbon fluxes in tropical streams
Abstract Water flow pathways and water balance are fundamental components for understanding the dynamics of C in the soil/water interface of small basins. The objective of this study was to describe the seasonal variations and estimate the annual balance of dissolved organic carbon (DOC) by comparin...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Ecology and Evolution |
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| Online Access: | https://doi.org/10.1002/ece3.2543 |
| _version_ | 1797742124628705280 |
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| author | Eline Nayara Dantas daCosta Jéssica Carneiro deSouza Marilane Andrade Pereira Marcelo Friederichs Landim deSouza Weber Friederichs Landim deSouza Daniela Mariano Lopes daSilva |
| author_facet | Eline Nayara Dantas daCosta Jéssica Carneiro deSouza Marilane Andrade Pereira Marcelo Friederichs Landim deSouza Weber Friederichs Landim deSouza Daniela Mariano Lopes daSilva |
| author_sort | Eline Nayara Dantas daCosta |
| collection | DOAJ |
| description | Abstract Water flow pathways and water balance are fundamental components for understanding the dynamics of C in the soil/water interface of small basins. The objective of this study was to describe the seasonal variations and estimate the annual balance of dissolved organic carbon (DOC) by comparing two tropical microbasins (preserved forest—PF and cacao plantation—CP). Twenty‐one weekly collections were conducted from September to December 2012 and from April to June 2013. The calculation of the partial balance considered precipitation (P) as inflow and the stream as outflow. The samples were filtered and analyzed using a TOC analyzer. Overall, the DOC was higher CP compared with FP. The behavior of both venues showed that rainy season caused an increase in concentrations in the overland flow (OF) and in the stream, and a decrease in the precipitation (P) and in the throughfall (T). In the CP, the outflow and the soil were chiefly responsible for the high DOC concentrations in the stream, when compared to the PF, which is the result of constant OM decomposition. Soil composition contributes to the control of DOC consumption in each type of soil. The balances were negative in both microbasins, although losses were higher in the AFS (agroforestry systems) when compared to the PF, especially during rainy seasons (−8.98 and −3.05 kg ha−1 year−1, CP and FP, respectively). Thus, the high annual loss of DOC in the CP of the microbasins during the rainy season indicates changes in ecosystem metabolism due to the vegetation cover and to the interactions with the soil. |
| first_indexed | 2024-03-12T14:36:28Z |
| format | Article |
| id | doaj.art-abc8291be60c40a896d330308b70d9d2 |
| institution | Directory Open Access Journal |
| issn | 2045-7758 |
| language | English |
| last_indexed | 2024-03-12T14:36:28Z |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Ecology and Evolution |
| spelling | doaj.art-abc8291be60c40a896d330308b70d9d22023-08-17T06:04:36ZengWileyEcology and Evolution2045-77582017-01-017122823910.1002/ece3.2543Influence of hydrological pathways on dissolved organic carbon fluxes in tropical streamsEline Nayara Dantas daCosta0Jéssica Carneiro deSouza1Marilane Andrade Pereira2Marcelo Friederichs Landim deSouza3Weber Friederichs Landim deSouza4Daniela Mariano Lopes daSilva5UESC/Laboratório de Biogeoquímica Universidade Estadual de Santa Cruz Ilhéus BA BrazilUESC/Laboratório de Biogeoquímica Universidade Estadual de Santa Cruz Ilhéus BA BrazilUESC/Laboratório de Biogeoquímica Universidade Estadual de Santa Cruz Ilhéus BA BrazilUESC/Laboratório de Biogeoquímica Universidade Estadual de Santa Cruz Ilhéus BA BrazilINT/Divisão de Química Analítica Laboratório de Química Analítica Inorgânica Instituto Nacional de Tecnologia Rio de Janeiro RJ BrazilUESC/Laboratório de Biogeoquímica Universidade Estadual de Santa Cruz Ilhéus BA BrazilAbstract Water flow pathways and water balance are fundamental components for understanding the dynamics of C in the soil/water interface of small basins. The objective of this study was to describe the seasonal variations and estimate the annual balance of dissolved organic carbon (DOC) by comparing two tropical microbasins (preserved forest—PF and cacao plantation—CP). Twenty‐one weekly collections were conducted from September to December 2012 and from April to June 2013. The calculation of the partial balance considered precipitation (P) as inflow and the stream as outflow. The samples were filtered and analyzed using a TOC analyzer. Overall, the DOC was higher CP compared with FP. The behavior of both venues showed that rainy season caused an increase in concentrations in the overland flow (OF) and in the stream, and a decrease in the precipitation (P) and in the throughfall (T). In the CP, the outflow and the soil were chiefly responsible for the high DOC concentrations in the stream, when compared to the PF, which is the result of constant OM decomposition. Soil composition contributes to the control of DOC consumption in each type of soil. The balances were negative in both microbasins, although losses were higher in the AFS (agroforestry systems) when compared to the PF, especially during rainy seasons (−8.98 and −3.05 kg ha−1 year−1, CP and FP, respectively). Thus, the high annual loss of DOC in the CP of the microbasins during the rainy season indicates changes in ecosystem metabolism due to the vegetation cover and to the interactions with the soil.https://doi.org/10.1002/ece3.2543Atlantic forestcacaocarbonorganic matterwatersheds |
| spellingShingle | Eline Nayara Dantas daCosta Jéssica Carneiro deSouza Marilane Andrade Pereira Marcelo Friederichs Landim deSouza Weber Friederichs Landim deSouza Daniela Mariano Lopes daSilva Influence of hydrological pathways on dissolved organic carbon fluxes in tropical streams Ecology and Evolution Atlantic forest cacao carbon organic matter watersheds |
| title | Influence of hydrological pathways on dissolved organic carbon fluxes in tropical streams |
| title_full | Influence of hydrological pathways on dissolved organic carbon fluxes in tropical streams |
| title_fullStr | Influence of hydrological pathways on dissolved organic carbon fluxes in tropical streams |
| title_full_unstemmed | Influence of hydrological pathways on dissolved organic carbon fluxes in tropical streams |
| title_short | Influence of hydrological pathways on dissolved organic carbon fluxes in tropical streams |
| title_sort | influence of hydrological pathways on dissolved organic carbon fluxes in tropical streams |
| topic | Atlantic forest cacao carbon organic matter watersheds |
| url | https://doi.org/10.1002/ece3.2543 |
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