Articles | Volume 20, issue 9
https://doi.org/10.5194/hess-20-3831-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/hess-20-3831-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
14 Sep 2016
Research article |
| 14 Sep 2016
The influence of riparian evapotranspiration on stream hydrology and nitrogen retention in a subhumid Mediterranean catchment
Anna Lupon
CORRESPONDING AUTHOR
Department d'Ecologia, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
Susana Bernal
Department d'Ecologia, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
Integrative Freshwater Ecology Group, Center for Advanced Studies of Blanes (CEAB-CSIC), Accés a la Cala Sant Francesc 14, 17300 Blanes, Spain
Sílvia Poblador
Department d'Ecologia, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
Eugènia Martí
Integrative Freshwater Ecology Group, Center for Advanced Studies of Blanes (CEAB-CSIC), Accés a la Cala Sant Francesc 14, 17300 Blanes, Spain
Francesc Sabater
Department d'Ecologia, Universitat de Barcelona, Av. Diagonal 643, 08028 Barcelona, Spain
CREAF, Campus de Bellaterra (UAB) Edifici C, 08193 Cerdanyola del Vallès, Spain
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Anna Lupon, Stefan Willem Ploum, Jason Andrew Leach, Lenka Kuglerová, and Hjalmar Laudon
Hydrol. Earth Syst. Sci., 27, 613–625, https://doi.org/10.5194/hess-27-613-2023, https://doi.org/10.5194/hess-27-613-2023, 2023
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Discrete riparian inflow points (DRIPs) transport dissolved organic carbon (DOC) from large areas to discrete sections of streams, yet the mechanisms by which DRIPs affect stream DOC concentration, cycling, and export are still unknown. Here, we tested four models that account for different hydrologic and biological representations to show that DRIPs generally reduce DOC exports by either diluting stream DOC (snowmelt period) or promoting aquatic metabolism (summer).
José L. J. Ledesma, Anna Lupon, Eugènia Martí, and Susana Bernal
Hydrol. Earth Syst. Sci., 26, 4209–4232, https://doi.org/10.5194/hess-26-4209-2022, https://doi.org/10.5194/hess-26-4209-2022, 2022
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We studied a small stream located in a Mediterranean forest. Our goal was to understand how stream flow and the presence of riparian forests, which grow in flat banks near the stream, influence the availability of food for aquatic microorganisms. High flows were associated with higher amounts of food because rainfall episodes transfer it from the surrounding sources, particularly riparian forests, to the stream. Understanding how ecosystems work is essential to better manage natural resources.
Anna Lupon, José L. J. Ledesma, and Susana Bernal
Hydrol. Earth Syst. Sci., 22, 4033–4045, https://doi.org/10.5194/hess-22-4033-2018, https://doi.org/10.5194/hess-22-4033-2018, 2018
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We used the PERSiST model to explore the role of riparian evapotranspiration (ET) in regulating streamflow in Mediterranean regions. Riparian ET was essential for understanding streamflow dynamics, especially in summer. Moreover, climate change simulations showed that the contribution of riparian ET to annual water budgets will increase in the future. We must include riparian zones in hydrological models in order to establish proper management strategies in water-limited regions.
Susana Bernal, Anna Lupon, Núria Catalán, Sara Castelar, and Eugènia Martí
Hydrol. Earth Syst. Sci., 22, 1897–1910, https://doi.org/10.5194/hess-22-1897-2018, https://doi.org/10.5194/hess-22-1897-2018, 2018
Sílvia Poblador, Anna Lupon, Santiago Sabaté, and Francesc Sabater
Biogeosciences, 14, 4195–4208, https://doi.org/10.5194/bg-14-4195-2017, https://doi.org/10.5194/bg-14-4195-2017, 2017
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This study quantified, for the first time, simultaneous rates of carbon dioxide (CO2) and nitrous oxide (N2O) from a Mediterranean riparian forest. Our results showed a strong linkage between riparian hydrology, soil microbial processes, and greenhouse gas (GHG) emissions. High CO2 effluxes occurred all year long, while N2O emissions were generally low and confined to saturated soils. Overall, this study shows that riparian soils can be hotspots of GHG emissions within Mediterranean catchment.
Anna Lupon, Stefan Willem Ploum, Jason Andrew Leach, Lenka Kuglerová, and Hjalmar Laudon
Hydrol. Earth Syst. Sci., 27, 613–625, https://doi.org/10.5194/hess-27-613-2023, https://doi.org/10.5194/hess-27-613-2023, 2023
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Discrete riparian inflow points (DRIPs) transport dissolved organic carbon (DOC) from large areas to discrete sections of streams, yet the mechanisms by which DRIPs affect stream DOC concentration, cycling, and export are still unknown. Here, we tested four models that account for different hydrologic and biological representations to show that DRIPs generally reduce DOC exports by either diluting stream DOC (snowmelt period) or promoting aquatic metabolism (summer).
José L. J. Ledesma, Anna Lupon, Eugènia Martí, and Susana Bernal
Hydrol. Earth Syst. Sci., 26, 4209–4232, https://doi.org/10.5194/hess-26-4209-2022, https://doi.org/10.5194/hess-26-4209-2022, 2022
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We studied a small stream located in a Mediterranean forest. Our goal was to understand how stream flow and the presence of riparian forests, which grow in flat banks near the stream, influence the availability of food for aquatic microorganisms. High flows were associated with higher amounts of food because rainfall episodes transfer it from the surrounding sources, particularly riparian forests, to the stream. Understanding how ecosystems work is essential to better manage natural resources.
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Lateral carbon fluxes from terrestrial to aquatic systems remain central uncertainties in determining ecosystem carbon balance. This work explores how temperature and hydrology control production and export of dissolved organic carbon (DOC) at the catchment scale. Results illustrate the asynchrony of DOC production, controlled by temperature, and export, governed by flow paths; concentration–discharge relationships are determined by the relative contribution of shallow versus groundwater flow.
Anna Lupon, José L. J. Ledesma, and Susana Bernal
Hydrol. Earth Syst. Sci., 22, 4033–4045, https://doi.org/10.5194/hess-22-4033-2018, https://doi.org/10.5194/hess-22-4033-2018, 2018
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We used the PERSiST model to explore the role of riparian evapotranspiration (ET) in regulating streamflow in Mediterranean regions. Riparian ET was essential for understanding streamflow dynamics, especially in summer. Moreover, climate change simulations showed that the contribution of riparian ET to annual water budgets will increase in the future. We must include riparian zones in hydrological models in order to establish proper management strategies in water-limited regions.
Susana Bernal, Anna Lupon, Núria Catalán, Sara Castelar, and Eugènia Martí
Hydrol. Earth Syst. Sci., 22, 1897–1910, https://doi.org/10.5194/hess-22-1897-2018, https://doi.org/10.5194/hess-22-1897-2018, 2018
Sílvia Poblador, Anna Lupon, Santiago Sabaté, and Francesc Sabater
Biogeosciences, 14, 4195–4208, https://doi.org/10.5194/bg-14-4195-2017, https://doi.org/10.5194/bg-14-4195-2017, 2017
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This study quantified, for the first time, simultaneous rates of carbon dioxide (CO2) and nitrous oxide (N2O) from a Mediterranean riparian forest. Our results showed a strong linkage between riparian hydrology, soil microbial processes, and greenhouse gas (GHG) emissions. High CO2 effluxes occurred all year long, while N2O emissions were generally low and confined to saturated soils. Overall, this study shows that riparian soils can be hotspots of GHG emissions within Mediterranean catchment.
S. Bernal, A. Lupon, M. Ribot, F. Sabater, and E. Martí
Biogeosciences, 12, 1941–1954, https://doi.org/10.5194/bg-12-1941-2015, https://doi.org/10.5194/bg-12-1941-2015, 2015
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Terrestrial inputs are considered the major driver of longitudinal patterns of nutrient concentration. Yet we show that longitudinal trends result from hydrological mixing with terrestrial inputs and in-stream processes. We challenge the idea that nutrient concentrations decrease downstream when in-stream net uptake is high. Conversely, in-stream processes can strongly affect stream nutrient chemistry and fluxes even in the absence of consistent longitudinal trends in nutrient concentration.
C. T. Chang, S. Sabaté, D. Sperlich, S. Poblador, F. Sabater, and C. Gracia
Biogeosciences, 11, 6173–6185, https://doi.org/10.5194/bg-11-6173-2014, https://doi.org/10.5194/bg-11-6173-2014, 2014
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Sébastien Lamontagne, Frédéric Cosme, Andrew Minard, and Andrew Holloway
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Hydrol. Earth Syst. Sci., 20, 2759–2777, https://doi.org/10.5194/hess-20-2759-2016, https://doi.org/10.5194/hess-20-2759-2016, 2016
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Short summary
The influence of riparian evapotranspiration (ET) on stream hydrology and chemistry is poorly understood. We investigated temporal changes in riparian ET, stream discharge and nutrient chemistry along a Mediterranean catchment. Despite being a small component of annual water budgets (4.5 %), our results highlight that riparian ET drives stream and groundwater hydrology in Mediterranean catchments and, further, question the potential of the riparian zone as a natural filter of nitrogen loads.
The influence of riparian evapotranspiration (ET) on stream hydrology and chemistry is poorly...
