Microbial respiration per unit biomass increases with carbon-to-nutrient ratios in forest soils
PBN-AR
Instytucja
Wydział Geodezji Górniczej i Inżynierii Środowiska (Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie)
Informacje podstawowe
Główny język publikacji
EN
Czasopismo
Soil Biology & Biochemistry
ISSN
0038-0717
EISSN
1879-3428
Wydawca
Pergamon-Elsevier Science
DOI
Rok publikacji
2015
Numer zeszytu
Strony od-do
128--133
Numer tomu
81
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
0.42
Autorzy
(liczba autorów: 2)
Pozostali autorzy
+ 1
Słowa kluczowe
EN
microbial respiration
microbial biomass
forest soil depth
litter layer
metabolic quotient (qCO2)
soil C:N:P stoichiometry
Streszczenia
Język
EN
Treść
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.
Cechy publikacji
original article
peer-reviewed
Inne
System-identifier
idp:086542
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