Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.scitotenv.2018.01.012
Document author version
Title (Primary) Early stage litter decomposition across biomes
Author Djukic, I.; Kepfer-Rojas, S.; Schmidt, I.K.; Larsen, K.S.; Beier, C.; Berg, B.; Verheyen, K.; Schmidt, A.; Rebmann, C.; Auge, H. ORCID logo ; García Quirós, I.; Stadler, J.; Dienstbach, L.; Frenzel, M. ORCID logo ; Schädler, M.; TeaComposition Network, et al.
Source Titel Science of the Total Environment
Year 2018
Department BZF; CHS; iDiv
Volume 628–629
Page From 1369
Page To 1394
Language englisch
Keywords Tea bag; Green tea; Rooibos tea; Carbon turnover; TeaComposition initiative
UFZ wide themes RU1;
Abstract Through litter decomposition enormous amount of carbon is emitted to the atmosphere. Numerous large-scale decomposition experiments have been conducted focusing on this fundamental soil process in order to understand the controls on the terrestrial carbon transfer to the atmosphere. However, previous studies were mostly based on site-specific litter and methodologies, adding major uncertainty to syntheses, comparisons and metaanalyses across different experiments and sites. In the TeaComposition initiative, the potential litter decomposition is investigated by using standardized substrates (Rooibos and Green tea) for comparison of litter mass loss in 336 sites (ranging from −9 to +26 °C MAT and from 60 to 3113mm MAP) across different ecosystems. In this study we tested the effect of climate (temperature and moisture), litter type and land-use on early stage decomposition (3 months) across nine biomes. We show that litter quality was the predominant controlling factor in early stage litter decomposition, which explained about 65% of the variability in litter decomposition at a global scale. The effect of climate, on the other hand, was not litter specific and explained b0.5% of the variation for Green tea and 5% for Rooibos tea, and was of significance only under unfavorable decomposition conditions (i.e. xeric versus mesic environments).When the data were aggregated at the biome scale, climate played a significant role on decomposition of both litter types (explaining 64% of the variation for Green tea and 72% for Rooibos tea).No significant effect of land-use on early stage litter decompositionwas notedwithin the temperate biome. Our results indicate that multiple drivers are affecting early stage littermass loss with litter quality being dominant. In order to be able to quantify the relative importance of the different drivers over time, long-term studies combined with experimental trials are needed.
Persistent UFZ Identifier
Djukic, I., Kepfer-Rojas, S., Schmidt, I.K., Larsen, K.S., Beier, C., Berg, B., Verheyen, K., Schmidt, A., Rebmann, C., Auge, H., García Quirós, I., Stadler, J., Dienstbach, L., Frenzel, M., Schädler, M., TeaComposition Network, et al. (2018):
Early stage litter decomposition across biomes
Sci. Total Environ. 628–629 , 1369 - 1394 10.1016/j.scitotenv.2018.01.012