Academic Journal
Separating the effects of temperature and carbon allocation on the diel pattern of soil respiration in the different phenological stages in dry grasslands.
| العنوان: | Separating the effects of temperature and carbon allocation on the diel pattern of soil respiration in the different phenological stages in dry grasslands. |
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| المؤلفون: | János Balogh, Szilvia Fóti, Marianna Papp, Krisztina Pintér, Zoltán Nagy |
| المصدر: | PLoS ONE, Vol 14, Iss 10, p e0223247 (2019) |
| بيانات النشر: | Public Library of Science (PLoS) |
| سنة النشر: | 2019 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | Medicine, Science |
| الوصف: | Diel variability of soil respiration is influenced by several factors including temperature and carbon allocation as the most significant ones, co-varying on multiple time scales. In an attempt to disentangle their effects we analyzed the dynamics of soil respiration components using data from a three-year soil respiration study. We measured CO2 efflux in intact, root-excluded and root- and mycorrhizal fungi excluded plots and analyzed the diel variability in different phenological stages. We used sine wave models to describe the diel pattern of soil respiration and to disentangle the effects of temperature from belowground carbon allocation based on the differences between component dynamics inferred from the fitted models. Rhizospheric respiration peaked 8-12 hours after GPP peak, while mycorrhizal fungi respiration had a longer time lag of 13-20 hours. Results of δ13CO2 isotopic signals from the respiration components showed similar patterns. It was found that drought affected the component respiration rates differently. Also, the speed and the amount of carbon allocation to the roots as well as to the mycorrhizal fungi was reduced under drought. We conclude that the diel variability of soil respiration is the result of the integrated patterns of temperature- and carbon allocation-driven components in dry grasslands and their share depends on their phenological stages and stress state. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1932-6203 |
| Relation: | https://doi.org/10.1371/journal.pone.0223247; https://doaj.org/toc/1932-6203; https://doaj.org/article/4dbacc14cf3647f692decfc5e59c162a |
| DOI: | 10.1371/journal.pone.0223247 |
| الاتاحة: | https://doi.org/10.1371/journal.pone.0223247 https://doaj.org/article/4dbacc14cf3647f692decfc5e59c162a |
| رقم الانضمام: | edsbas.2E6A1025 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 19326203 |
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| DOI: | 10.1371/journal.pone.0223247 |