|
| << vorige | volgende >> |
Tijdschrift beschrijving
Alle jaargangen van het bijbehorende tijdschrift
Alle afleveringen van het bijbehorende jaargang
Alle artikelen van de bijbehorende aflevering
Details van artikel 103 van 146 gevonden artikelen
| Titel: |
Quality or decomposer efficiency – which is most important in the temperature response of litter decomposition? A modelling study using the GLUE methodology |
| Auteur: |
J. Å. M. Wetterstedt G. I. Ågren |
| Verschenen in: |
Biogeosciences discussions |
| Paginering: | Jaargang 7 (2010) nr. 6 pagina's 8699-8722 |
| Jaar: |
2010 |
| Inhoud: |
Effects of temperature history on litter decomposition were evaluated using the GLUE modelling framework together with the Q-model calibrated to a needle litter incubation experiment. The needle litter incubation was a full factorial design with initial and final temperatures 5, 15 and 25 °C. Samples were moved from the initial to the final temperature when approximately 12% of the initial carbon had been respired. We used four variations of the Q-model: one or two initial litter quality values and fixed or temperature-dependent decomposer efficiency. The model was calibrated to the constant temperature data subset. Evaluation against temperature shift subsets gave good results, except just after the change in temperature where the model predicted a smaller response than observed. Using one or two initial litter quality values and fixed decomposer efficiency had little effect on final litter quality and respiration at the final incubation temperature. Allowing decomposer efficiency to vary with temperature showed that decomposer efficiency should decrease between 5 to 15 °C but with no change between 15 and 25 °C. A flexible decomposer efficiency resulted also in substantial differences in litter quality at the end of the initial incubation in response to incubation temperature. The results suggests that it is important to consider other factors than the variation in temperature sensitivity with quality when evaluating effects of temperature changes on soil organic matter stability. |
| Uitgever: |
Copernicus GmbH (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 103 van 146 gevonden artikelen
| << vorige | volgende >> |