 |
| Titel |
The moisture response of soil heterotrophic respiration: interaction with soil properties |
| VerfasserIn |
F. E. Moyano, N. Vasilyeva, L. Bouckaert, F. Cook, J. Craine, J. Curiel Yuste, A. Don, D. Epron, P. Formanek, A. Franzluebbers, U. Ilstedt, T. Kätterer, V. Orchard, M. Reichstein, A. Rey, L. Ruamps, J.-A. Subke, I. K. Thomsen, C. Chenu |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1726-4170
|
| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 9, no. 3 ; Nr. 9, no. 3 (2012-03-28), S.1173-1182 |
| Datensatznummer |
250006852
|
| Publikation (Nr.) |
 copernicus.org/bg-9-1173-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
| Soil moisture is of primary importance for predicting the evolution of soil
carbon stocks and fluxes, both because it strongly controls organic matter
decomposition and because it is predicted to change at global scales in the
following decades. However, the soil functions used to model the
heterotrophic respiration response to moisture have limited empirical
support and introduce an uncertainty of at least 4% in global soil
carbon stock predictions by 2100. The necessity of improving the
representation of this relationship in models has been highlighted in recent
studies. Here we present a data-driven analysis of soil moisture-respiration
relations based on 90 soils. With the use of linear models we show how the
relationship between soil heterotrophic respiration and different measures
of soil moisture is consistently affected by soil properties. The empirical
models derived include main effects and moisture interaction effects of soil
texture, organic carbon content and bulk density. When compared to other
functions currently used in different soil biogeochemical models, we observe
that our results can correct biases and reconcile differences within and
between such functions. Ultimately, accurate predictions of the response of
soil carbon to future climate scenarios will require the integration of
soil-dependent moisture-respiration functions coupled with realistic
representations of soil water dynamics. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|