KIT | KIT-Bibliothek | Impressum | Datenschutz
Open Access Logo
§
Volltext
URN: urn:nbn:de:swb:90-483082
Originalveröffentlichung
DOI: 10.5194/bgd-12-8085-2015

The influence of C₃ and C₄ vegetation on soil organic matter dynamics in contrasting semi-natural tropical ecosystems

Saiz, G.; Bird, M.; Wurster, C.; Quesada, C. A.; Ascough, P.; Domingues, T.; Schrodt, F.; Schwarz, M.; Feldpausch, T. R.; Veenendaal, E.; Djagbletey, G.; Jacobsen, G.; Hien, F.; Compaore, H.; Diallo, A.; Lloyd, J.

Abstract:
Variations in the carbon isotopic composition of soil organic matter (SOM) in bulk and fractionated samples were used to assess the influence of C3 and C4 vegetation on SOM dynamics in semi-natural tropical ecosystems sampled along a precipitation gradient in West Africa. Differential patterns in SOM dynamics in C3/C4 mixed ecosystems occurred at various spatial scales. Relative changes in C / N ratios between two contrasting SOM fractions were used to evaluate potential site-scale differences in SOM dynamics between C3- and C4-dominated locations. These differences were strongly controlled by soil texture across the precipitation gradient, with a function driven by bulk delta 13C and sand content explaining 0.63 of the observed variability. The variation of delta 13C with soil depth indicated a greater accumulation of C3-derived carbon with increasing precipitation, with this trend being also strongly dependant on soil characteristics. The influence of vegetation thickening on SOM dynamics was also assessed in two adjacent, but structurally contrasting, transitional ecosystems occurring on comparable soils to minimise confounding e ... mehr


Zugehörige Institution(en) am KIT Fakultät für Physik (PHYSIK)
Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator ISSN: 1810-6277, 1810-6285
KITopen ID: 1000048308
HGF-Programm 12.02.01; LK 01
Erschienen in Biogeosciences discussions
Band 12
Heft 10
Seiten 8085-8130
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft KITopen Landing Page