Background and aims: Invasive alien species can dramatically change the litter and organic matter decomposition rate, nutrient cycling and availability, thus threatening the ecosystem functionality. We assessed the effect of red oak (QR) introduction on low fertility well-developed soils, originally covered by Quercus robur L. (QC). Methods: We determined litter and soil organic matter composition and decomposition rate by combining morphological features with 13C NMR spectroscopy, NaClO oxidation and soil respiration. Total and available nutrients were also determined. Results: The sites showed different humus forms: Dysmull-Hemimoder in QC and Mor in QR. The Oi horizons had a similar composition, but the higher presence of tannins and alkyl C/O − alkyl C and aryl C/O − alkyl C ratios in QR indicated that litter was less degradable. This was confirmed by soil respiration tests, with a higher preservation of the NaClO resistant fraction along the profile, mainly due to selective accumulation of alkyl components. This was accompanied by high retention of phosphorus in the organic horizons and drastic reduction of both total and available P in the mineral horizons. Calcium was strongly affected too. Conclusions: In these well-developed soils red oak changed organic matter dynamics, reduced P availability and cation biocycling, leading the ecosystem functionality towards a no-return threshold.

Alien red oak affects soil organic matter cycling and nutrient availability in low-fertility well-developed soils / E. Bonifacio, M. Petrillo, F. Petrella, F. Tambone, L. Celi. - In: PLANT AND SOIL. - ISSN 0032-079X. - 395:1-2(2015), pp. 215-229. [10.1007/s11104-015-2555-9]

Alien red oak affects soil organic matter cycling and nutrient availability in low-fertility well-developed soils

F. Tambone;
2015

Abstract

Background and aims: Invasive alien species can dramatically change the litter and organic matter decomposition rate, nutrient cycling and availability, thus threatening the ecosystem functionality. We assessed the effect of red oak (QR) introduction on low fertility well-developed soils, originally covered by Quercus robur L. (QC). Methods: We determined litter and soil organic matter composition and decomposition rate by combining morphological features with 13C NMR spectroscopy, NaClO oxidation and soil respiration. Total and available nutrients were also determined. Results: The sites showed different humus forms: Dysmull-Hemimoder in QC and Mor in QR. The Oi horizons had a similar composition, but the higher presence of tannins and alkyl C/O − alkyl C and aryl C/O − alkyl C ratios in QR indicated that litter was less degradable. This was confirmed by soil respiration tests, with a higher preservation of the NaClO resistant fraction along the profile, mainly due to selective accumulation of alkyl components. This was accompanied by high retention of phosphorus in the organic horizons and drastic reduction of both total and available P in the mineral horizons. Calcium was strongly affected too. Conclusions: In these well-developed soils red oak changed organic matter dynamics, reduced P availability and cation biocycling, leading the ecosystem functionality towards a no-return threshold.
Biocycling; Forest soils; Fragipan; Luvisols; Non-resilient ecosystem; Oligonutrients; Phosphorus; Soil Science; Plant Science
Settore AGR/13 - Chimica Agraria
Article (author)
File in questo prodotto:
File Dimensione Formato  
articolo Celi.pdf

non disponibili

Tipologia: Publisher's version/PDF
Dimensione 2.08 MB
Formato Adobe PDF
2.08 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
art%3A10.1007%2Fs11104-015-2555-9.pdf

non disponibili

Tipologia: Publisher's version/PDF
Dimensione 2.04 MB
Formato Adobe PDF
2.04 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/379158
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 24
  • ???jsp.display-item.citation.isi??? 23
social impact