Soil-atmosphere greenhouse gases (CO2, CH4 and N2O) exchange in evergreen oak woodland in southern Portugal
A 10-20% decrease in annual precipitation is predicted in the Mediterranean basin, and in particular to the Iberian Peninsula, with foreseen effects on the exchange of soil-atmosphere greenhouse gases (GHGs; CO2, CH4, and N2O). To simulate this scenario, we setup an experimental design in the partic...
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| Format: | Article |
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Czech Academy of Agricultural Sciences
2011-10-01
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| Series: | Plant, Soil and Environment |
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| Online Access: | https://pse.agriculturejournals.cz/artkey/pse-201110-0005_soil-atmosphere-greenhouse-gases-co2-ch4-and-n2o-exchange-in-evergreen-oak-woodland-in-southern-portugal.php |
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| author | A. Shvaleva R. Lobo-do-Vale C. Cruz S. Castaldi A.P. Rosa M.M. Chaves J.S. Pereira |
| author_facet | A. Shvaleva R. Lobo-do-Vale C. Cruz S. Castaldi A.P. Rosa M.M. Chaves J.S. Pereira |
| author_sort | A. Shvaleva |
| collection | DOAJ |
| description | A 10-20% decrease in annual precipitation is predicted in the Mediterranean basin, and in particular to the Iberian Peninsula, with foreseen effects on the exchange of soil-atmosphere greenhouse gases (GHGs; CO2, CH4, and N2O). To simulate this scenario, we setup an experimental design in the particularly dry period of 2008-2009 using rainfall exclusion and irrigation, to obtain plots receiving 110% (538 mm), 100% (493 mm) and 74% (365 mm) of the natural precipitation. Soil CO2 fluxes showed a strong increase from summer to autumn as a consequence of increasing soil heterotrophic respiration that resulted from rewetting. Fluxes of N2O were negligible. According to our data, soil was a permanent CH4 sink independent of the soil water content (in the range between 6-26% WFPS - water-filled pore space) and of soil temperature (in the range of 7-28°C), supporting the concept that seasonally dry ecosystems (Mediterranean) may represent a significant sink of atmospheric CH4. The study provides evidence that the 26% decrease or 10% increase in the ambient rainfall from annual precipitation of ca 500 mm did not significantly affect soil functionality and had a limited impact on soil-atmosphere net GHGs exchange in evergreen oak woodlands in southern Portugal. |
| first_indexed | 2024-04-10T08:11:01Z |
| format | Article |
| id | doaj.art-951f4229b3054176a5bd10e612788a62 |
| institution | Directory Open Access Journal |
| issn | 1214-1178 1805-9368 |
| language | English |
| last_indexed | 2024-04-10T08:11:01Z |
| publishDate | 2011-10-01 |
| publisher | Czech Academy of Agricultural Sciences |
| record_format | Article |
| series | Plant, Soil and Environment |
| spelling | doaj.art-951f4229b3054176a5bd10e612788a622023-02-23T03:45:45ZengCzech Academy of Agricultural SciencesPlant, Soil and Environment1214-11781805-93682011-10-01571047147710.17221/223/2011-PSEpse-201110-0005Soil-atmosphere greenhouse gases (CO2, CH4 and N2O) exchange in evergreen oak woodland in southern PortugalA. Shvaleva0R. Lobo-do-Vale1C. Cruz2S. Castaldi3A.P. Rosa4M.M. Chaves5J.S. Pereira6Institute of Technological Chemistry and Biology, New University of Lisbon, Av. República, Oeiras, PortugalInstitute of Agronomy, Technical University of Lisbon, Tapada da Ajuda, Lisbon, PortugalFaculty of Sciences, University of Lisbon (CBA), Lisbon, PortugalSecond University, Caserta, ItalyFaculty of Sciences, University of Lisbon (CBA), Lisbon, PortugalInstitute of Technological Chemistry and Biology, New University of Lisbon, Av. República, Oeiras, PortugalInstitute of Agronomy, Technical University of Lisbon, Tapada da Ajuda, Lisbon, PortugalA 10-20% decrease in annual precipitation is predicted in the Mediterranean basin, and in particular to the Iberian Peninsula, with foreseen effects on the exchange of soil-atmosphere greenhouse gases (GHGs; CO2, CH4, and N2O). To simulate this scenario, we setup an experimental design in the particularly dry period of 2008-2009 using rainfall exclusion and irrigation, to obtain plots receiving 110% (538 mm), 100% (493 mm) and 74% (365 mm) of the natural precipitation. Soil CO2 fluxes showed a strong increase from summer to autumn as a consequence of increasing soil heterotrophic respiration that resulted from rewetting. Fluxes of N2O were negligible. According to our data, soil was a permanent CH4 sink independent of the soil water content (in the range between 6-26% WFPS - water-filled pore space) and of soil temperature (in the range of 7-28°C), supporting the concept that seasonally dry ecosystems (Mediterranean) may represent a significant sink of atmospheric CH4. The study provides evidence that the 26% decrease or 10% increase in the ambient rainfall from annual precipitation of ca 500 mm did not significantly affect soil functionality and had a limited impact on soil-atmosphere net GHGs exchange in evergreen oak woodlands in southern Portugal.https://pse.agriculturejournals.cz/artkey/pse-201110-0005_soil-atmosphere-greenhouse-gases-co2-ch4-and-n2o-exchange-in-evergreen-oak-woodland-in-southern-portugal.phpclimate changedroughtmediterraneanprecipitation |
| spellingShingle | A. Shvaleva R. Lobo-do-Vale C. Cruz S. Castaldi A.P. Rosa M.M. Chaves J.S. Pereira Soil-atmosphere greenhouse gases (CO2, CH4 and N2O) exchange in evergreen oak woodland in southern Portugal Plant, Soil and Environment climate change drought mediterranean precipitation |
| title | Soil-atmosphere greenhouse gases (CO2, CH4 and N2O) exchange in evergreen oak woodland in southern Portugal |
| title_full | Soil-atmosphere greenhouse gases (CO2, CH4 and N2O) exchange in evergreen oak woodland in southern Portugal |
| title_fullStr | Soil-atmosphere greenhouse gases (CO2, CH4 and N2O) exchange in evergreen oak woodland in southern Portugal |
| title_full_unstemmed | Soil-atmosphere greenhouse gases (CO2, CH4 and N2O) exchange in evergreen oak woodland in southern Portugal |
| title_short | Soil-atmosphere greenhouse gases (CO2, CH4 and N2O) exchange in evergreen oak woodland in southern Portugal |
| title_sort | soil atmosphere greenhouse gases co2 ch4 and n2o exchange in evergreen oak woodland in southern portugal |
| topic | climate change drought mediterranean precipitation |
| url | https://pse.agriculturejournals.cz/artkey/pse-201110-0005_soil-atmosphere-greenhouse-gases-co2-ch4-and-n2o-exchange-in-evergreen-oak-woodland-in-southern-portugal.php |
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