Szczegóły publikacji
Opis bibliograficzny
Microbial respiration per unit biomass increases with carbon-to-nutrient ratios in forest soils / Marie Spohn, Marcin CHODAK // Soil Biology & Biochemistry ; ISSN 0038-0717. — 2015 — vol. 81, s. 128–133. — Bibliogr. s. 133, Abstr. — M. Chrobak – dod. afiliacja: Georg-August-University Göttingen ; w bazie Web of Science brak afiliacji AGH
Autorzy (2)
- Spohn Marie
- AGHChodak Marcin
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 86542 |
|---|---|
| Data dodania do BaDAP | 2014-12-16 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.soilbio.2014.11.008 |
| Rok publikacji | 2015 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Soil Biology & Biochemistry |
Abstract
The ratio of carbon-to-nutrient in forest floors is usually much higher than the ratio of carbon-to-nutrient that soil microorganisms require for their nutrition. In order to understand how this mismatch affects carbon (C) cycling, we investigated the respiration rate per unit soil microbial biomass the metabolic quotient (qCO(2)) - in relation to the soil carbon-to-nitrogen (C:N) and carbon-to-phosphorus (C:P) ratio in temperate forests. For this purpose, cores of beech, spruce, and mixed spruce-beech forest soils were cut into slices of 1 cm from the litter layer down to 5 cm in the mineral soil, and the relationship between the qCO(2) and the soil C:N and the soil C:P ratio was analyzed. We found that the qCO(2) was positively correlated with soil C:N ratio in spruce soils (R = 0.72), and with the soil C:P ratio in beech (R = 0.93), spruce (R = 0.80) and mixed forest soils (R = 0.96). We also observed a close correlation between the qCO(2) and the soil C concentration in all three forest types. Yet, the qCO(2) decreased less with depth than the C concentration in all three forest types, suggesting that the change in qCO(2) is not only controlled by the soil C concentration. We conclude that microorganisms increase their respiration rate per unit biomass with increasing soil C:P ratio and C concentration, which adjusts the substrate to their nutritional demands in terms of stoichiometry.
