Spatial uncoupling of biodegradation, soil respiration, and PAH concentration in a creosote contaminated soil.
Författare
Summary, in English
Hotspots and coldspots of concentration and biodegradation of polycyclic aromatic hydrocarbons (PAHs) marginally overlapped at the 0.5-100 m scale in a creosote contaminated soil in southern Sweden, suggesting that concentration and biodegradation had little spatial co-variation. Biodegradation was substantial and its spatial variability considerable and highly irregular, but it had no spatial autocorrelation. The soil concentration of PAHs explained only 20-30% of the variance of their biodegradation. Soil respiration was spatially autocorrelated. The spatial uncoupling between biodegradation and soil respiration seemed to be governed by the aging of PAHs in the soil, since biodegradation of added (13)C phenanthrene covaried with both soil respiration and microbial biomass. The latter two were also correlated with high concentrations of phospholipid fatty acids (PLFAs) that are common in gram-negative bacteria. However, several of the hotspots of biodegradation coincided with hotspots for the distribution of a PLFA indicative of fungal biomass.
Avdelning/ar
Publiceringsår
2010
Språk
Engelska
Sidor
2865-2871
Publikation/Tidskrift/Serie
Environmental Pollution
Volym
158
Issue
9
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Ecology
Aktiv
Published
ISBN/ISSN/Övrigt
- ISSN: 0269-7491