| Title | The Response of Soil CO2 Efflux to Water Limitation Is Not Merely a Climatic Issue: The Role of Substrate Availability |
| Publication Type | Journal Article |
| Year of Publication | 2017 |
| Authors | de Dato G., Lagomarsino A., Lellei-Kovacs E., Liberati D., R. Jaoude A, Marabottini R., Stazi S.R, Guidolotti G., Kovacs-Lang E., Kroel-Dulay G., De Angelis P. |
| Journal | Forests |
| Volume | 8 |
| Pagination | 22 |
| Date Published | Jul |
| Type of Article | Article |
| ISBN Number | 1999-4907 |
| Accession Number | WOS:000406694400021 |
| Keywords | carbon inputs, drought, experimental drought, Forestry, gas-exchange, Heterotrophic respiration, labile carbon, microbial community, microbial community composition, photosynthesis, precipitation regimes, respiration, response, soil CO2 efflux, substrate availability, temperature, temporal variation, use efficiency |
| Abstract | Water availability, together with temperature, represents the most limiting abiotic factor regulating soil CO2 efflux (SR). Besides the direct effect of water limitation, drought also influences plant activity, determining changes in the quality and quantity of root exudates, thus indirectly affecting soil microbial activity. To determine how the seasonal changes of plant activity and soil microbial metabolism and structure affect SR response to drought, we investigated the correlation between leaf gas exchange, soil carbon pools and soil respiration sources and the role of soil carbon pools on microbial populations and soil respiration, in a summer deciduous Mediterranean (SDS) and a winter deciduous temperate (WDS) shrublands, experiencing a dry summer period. In both sites, drought reduced photosynthesis, but affected SR differently: in SDS, SR decreased, although microbial heterotrophic respiration (SRh) remained unchanged; in WDS, SR did not vary but SRh was reduced. While in SDS the microbial community was able to respire more complex substrates, in WDS it was strongly dependent on easily decomposable molecules, thus on plant activity. Therefore, the response of soil CO2 efflux to water limitation is not exclusively influenced by climate as it is modulated by the degree of adaptation of the microbial community to drought. |
| Short Title | ForestsForests |
| Alternate Journal | Forests |
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- The Response of Soil CO2 Efflux to Water Limitation Is Not Merely a Climatic Issue: The Role of Substrate Availability
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de Dato, Giovanbattista Lagomarsino, Alessandra Lellei-Kovacs, Eszter Liberati, Dario Abou Jaoude, Renee Marabottini, Rosita Stazi, Silvia Rita Guidolotti, Gabriele Kovacs-Lang, Edit Kroel-Dulay, Gyorgy De Angelis, Paolo
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De Angelis, Paolo/0000-0001-8310-8831; Lagomarsino, Alessandra/0000-0003-3325-0084; de Dato, Giovanbattista D./0000-0003-0289-1727
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de Dato, G (reprint author), Ctr Forestry & Wood CREA FL, Council Agr Res & Econ, Viale Santa Margherita 80, I-52100 Arezzo, Italy.
giovanbattista.dedato@crea.gov.it; alessandra.lagomarsino@crea.gov.it; lellei-kovacs.eszter@okologia.mta.hu; darioliberati@unitus.it; renee.aboujaoude@gmail.com; marabottini@unitus.it; srstazi@unitus.it; gabriele.guidolotti@ibaf.cnr.it; lang.edit@okologia.mta.hu; kroel-dulay.gyorgy@okologia.mta.hu; pda@unitus.it
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