Seasonal carbon fluxes from vegetation and soil in a Mediterranean non-tidal salt marsh
<p>Salt marshes are important ecosystems for carbon sequestration. However, while studies of atmospheric carbon exchange fluxes have broadly been performed in tidal salt marshes, they are scarce in non-tidal salt marshes. In this study we measured, throughout 1 year, instantaneous net carbon d...
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Copernicus Publications
2025-01-01
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| Series: | Biogeosciences |
| Online Access: | https://bg.copernicus.org/articles/22/289/2025/bg-22-289-2025.pdf |
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| author | L. Carrasco-Barea D. Verdaguer M. Gispert X. D. Quintana H. Bourhis L. Llorens |
| author_facet | L. Carrasco-Barea D. Verdaguer M. Gispert X. D. Quintana H. Bourhis L. Llorens |
| author_sort | L. Carrasco-Barea |
| collection | DOAJ |
| description | <p>Salt marshes are important ecosystems for carbon sequestration. However, while studies of atmospheric carbon exchange fluxes have broadly been performed in tidal salt marshes, they are scarce in non-tidal salt marshes. In this study we measured, throughout 1 year, instantaneous net carbon dioxide (<span class="inline-formula">CO<sub>2</sub></span>) exchange rates from four halophytes which are dominant species of their corresponding habitat (<i>Sarcocornia fruticosa</i> in a halophilous scrub, <i>Halimione portulacoides</i> and <i>Elytrigia atherica</i> in a salt meadow, and <i>Salicornia patula</i> in a glasswort sward) of a Mediterranean non-tidal salt marsh. Soil <span class="inline-formula">CO<sub>2</sub></span> and methane (<span class="inline-formula">CH<sub>4</sub></span>) fluxes from these habitats were also measured. <i>E. atherica</i>, a perennial herbaceous species, showed the highest photosynthetic rates during the entire year, but <i>S. patula</i>, an annual succulent herb, also had remarkable photosynthetic rates in summer. Interestingly, the woody fraction of the two perennial shrubs, <i>S. fruticosa</i> and <i>H. portulacoides</i>, showed <span class="inline-formula">CO<sub>2</sub></span> uptake during most of the daily measurements. Regarding the studied habitats, the halophilous scrub and the salt meadow showed higher soil <span class="inline-formula">CO<sub>2</sub></span> emissions than the glasswort sward, and the overall emissions were higher than those reported for tidal salt marshes. Both soil absorption and emission of <span class="inline-formula">CH<sub>4</sub></span> were detected. In particular, <span class="inline-formula">CH<sub>4</sub></span> emissions were remarkably high, similar to those found in low-salinity marshes and, in general, higher than those reported for salt marshes with a high water table salinity. Soil mineralization quotients of the halophilous scrub and the salt meadow were lower than those measured at the glasswort sward, suggesting a higher soil carbon sequestration potential of the first two habitats.</p> |
| format | Article |
| id | doaj-art-75f343f68dd640cc9c6496bdec147a7f |
| institution | Kabale University |
| issn | 1726-4170 1726-4189 |
| language | English |
| publishDate | 2025-01-01 |
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| spelling | doaj-art-75f343f68dd640cc9c6496bdec147a7f2025-01-14T08:17:12ZengCopernicus PublicationsBiogeosciences1726-41701726-41892025-01-012228930410.5194/bg-22-289-2025Seasonal carbon fluxes from vegetation and soil in a Mediterranean non-tidal salt marshL. Carrasco-Barea0D. Verdaguer1M. Gispert2X. D. Quintana3H. Bourhis4L. Llorens5Group of Soils and Vegetation in the Mediterranean (SOLIPLANT), Plant Physiology Unit, Department of Environmental Sciences, Faculty of Sciences, University of Girona, Campus Montilivi, 17003 Girona, SpainGroup of Soils and Vegetation in the Mediterranean (SOLIPLANT), Plant Physiology Unit, Department of Environmental Sciences, Faculty of Sciences, University of Girona, Campus Montilivi, 17003 Girona, SpainGroup of Soils and Vegetation in the Mediterranean (SOLIPLANT), Soil Science Unit, Department of Chemical and Agricultural Engineering and Agrifood Technology, University of Girona, Campus Montilivi, 17003 Girona, SpainGRECO, Institute of Aquatic Ecology, University of Girona, Campus Montilivi, 17003 Girona, SpainGroup of Soils and Vegetation in the Mediterranean (SOLIPLANT), Plant Physiology Unit, Department of Environmental Sciences, Faculty of Sciences, University of Girona, Campus Montilivi, 17003 Girona, SpainGroup of Soils and Vegetation in the Mediterranean (SOLIPLANT), Plant Physiology Unit, Department of Environmental Sciences, Faculty of Sciences, University of Girona, Campus Montilivi, 17003 Girona, Spain<p>Salt marshes are important ecosystems for carbon sequestration. However, while studies of atmospheric carbon exchange fluxes have broadly been performed in tidal salt marshes, they are scarce in non-tidal salt marshes. In this study we measured, throughout 1 year, instantaneous net carbon dioxide (<span class="inline-formula">CO<sub>2</sub></span>) exchange rates from four halophytes which are dominant species of their corresponding habitat (<i>Sarcocornia fruticosa</i> in a halophilous scrub, <i>Halimione portulacoides</i> and <i>Elytrigia atherica</i> in a salt meadow, and <i>Salicornia patula</i> in a glasswort sward) of a Mediterranean non-tidal salt marsh. Soil <span class="inline-formula">CO<sub>2</sub></span> and methane (<span class="inline-formula">CH<sub>4</sub></span>) fluxes from these habitats were also measured. <i>E. atherica</i>, a perennial herbaceous species, showed the highest photosynthetic rates during the entire year, but <i>S. patula</i>, an annual succulent herb, also had remarkable photosynthetic rates in summer. Interestingly, the woody fraction of the two perennial shrubs, <i>S. fruticosa</i> and <i>H. portulacoides</i>, showed <span class="inline-formula">CO<sub>2</sub></span> uptake during most of the daily measurements. Regarding the studied habitats, the halophilous scrub and the salt meadow showed higher soil <span class="inline-formula">CO<sub>2</sub></span> emissions than the glasswort sward, and the overall emissions were higher than those reported for tidal salt marshes. Both soil absorption and emission of <span class="inline-formula">CH<sub>4</sub></span> were detected. In particular, <span class="inline-formula">CH<sub>4</sub></span> emissions were remarkably high, similar to those found in low-salinity marshes and, in general, higher than those reported for salt marshes with a high water table salinity. Soil mineralization quotients of the halophilous scrub and the salt meadow were lower than those measured at the glasswort sward, suggesting a higher soil carbon sequestration potential of the first two habitats.</p>https://bg.copernicus.org/articles/22/289/2025/bg-22-289-2025.pdf |
| spellingShingle | L. Carrasco-Barea D. Verdaguer M. Gispert X. D. Quintana H. Bourhis L. Llorens Seasonal carbon fluxes from vegetation and soil in a Mediterranean non-tidal salt marsh Biogeosciences |
| title | Seasonal carbon fluxes from vegetation and soil in a Mediterranean non-tidal salt marsh |
| title_full | Seasonal carbon fluxes from vegetation and soil in a Mediterranean non-tidal salt marsh |
| title_fullStr | Seasonal carbon fluxes from vegetation and soil in a Mediterranean non-tidal salt marsh |
| title_full_unstemmed | Seasonal carbon fluxes from vegetation and soil in a Mediterranean non-tidal salt marsh |
| title_short | Seasonal carbon fluxes from vegetation and soil in a Mediterranean non-tidal salt marsh |
| title_sort | seasonal carbon fluxes from vegetation and soil in a mediterranean non tidal salt marsh |
| url | https://bg.copernicus.org/articles/22/289/2025/bg-22-289-2025.pdf |
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