J 2020

Decomposition of labile and recalcitrant coniferous litter fractions affected by temperature during the growing season

JÍLKOVÁ, Veronika, Kristýna DUFKOVÁ and Tomáš CAJTHAML

Basic information

Original name

Decomposition of labile and recalcitrant coniferous litter fractions affected by temperature during the growing season

Authors

JÍLKOVÁ, Veronika (guarantor), Kristýna DUFKOVÁ (203 Czech Republic, belonging to the institution) and Tomáš CAJTHAML

Edition

Journal of Forestry Research, Harbin, Northeast Forestry University, 2020, 1007-662X

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

40102 Forestry

Country of publisher

China

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 2.149

RIV identification code

RIV/00216224:14310/20:00116404

Organization unit

Faculty of Science

DOI

UT WoS

000542370400003

Keywords in English

Temperate forest; Picea abies; Soil respiration; Hot water-extractable carbon; PLFA (phospholipid fatty acids)

Tags

Tags

International impact, Reviewed
Změněno: 14/9/2020 09:27, Mgr. Marie Šípková, DiS.

Abstract

V originále

Temperate coniferous forest soils are considered important sinks of soil organic carbon (C). Fresh C inputs may, however, affect soil microbial activity, leading to increased organic matter decomposition and carbon dioxide production. Litter consists of labile and recalcitrant fractions which are thought to be utilized by distinct microbial communities and at different rates during the growing season. In this study, we incubated the whole litter (LC + RC), the labile (LC) and the recalcitrant (RC) fractions with the coniferous soil at two temperatures representing spring/autumn (10 degrees C) and summer (20 degrees C) for one month. Soil respiration and microbial community composition were regularly determined using phospholipid fatty acids as biomarkers. The LC fraction greatly increased soil respiration at the beginning of the incubation period but this effect was rather short-term. The effect of the RC fraction persisted longer and, together with the LC + RC fraction, respiration increased during the whole incubation period. Decomposition of the RC fraction was more strongly affected by higher temperatures than decomposition of the more labile fractions (LC and LC + RC). However, when we consider the relative increase in soil respiration compared to the dH(2)O treatment, respiration increased more at a lower temperature, suggesting that available C is more important for microbial metabolism at lower temperatures. Although C was added only once in our study, no changes in microbial community composition were detected, possibly because the microbial community is adapted to relatively low amounts of additional C such as the amounts naturally found in litter.