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Regulation of priming effect by soil organic matter stability over a broad geographic scale
- Source :
- Nature Communications, Nature Communications, Vol 10, Iss 1, Pp 1-10 (2019)
- Publication Year :
- 2019
- Publisher :
- Nature Publishing Group UK, 2019.
-
Abstract
- The modification of soil organic matter (SOM) decomposition by plant carbon (C) input (priming effect) represents a critical biogeochemical process that controls soil C dynamics. However, the patterns and drivers of the priming effect remain hidden, especially over broad geographic scales under various climate and soil conditions. By combining systematic field and laboratory analyses based on multiple analytical and statistical approaches, we explore the determinants of priming intensity along a 2200 km grassland transect on the Tibetan Plateau. Our results show that SOM stability characterized by chemical recalcitrance and physico-chemical protection explains more variance in the priming effect than plant, soil and microbial properties. High priming intensity (up to 137% of basal respiration) is associated with complex SOM chemical structures and low mineral-organic associations. The dependence of priming effect on SOM stabilization mechanisms should be considered in Earth System Models to accurately predict soil C dynamics under changing environments.<br />Global soil carbon dynamics are regulated by the modification of soil organic matter (SOM) decomposition by plant carbon input (priming effect). Here, the authors collect soil data along a 2200 km grassland transect on the Tibetan Plateau and find that SOM stability is the major control on priming effect.
- Subjects :
- Biogeochemical cycle
010504 meteorology & atmospheric sciences
Science
soil
priming effect
organic matter stability
General Physics and Astronomy
Soil science
01 natural sciences
General Biochemistry, Genetics and Molecular Biology
Grassland
Article
lcsh:Science
Transect
0105 earth and related environmental sciences
2. Zero hunger
geography
Multidisciplinary
geography.geographical_feature_category
Soil organic matter
04 agricultural and veterinary sciences
General Chemistry
Soil carbon
15. Life on land
Biogeochemistry
Geochemistry
13. Climate action
040103 agronomy & agriculture
0401 agriculture, forestry, and fisheries
Environmental science
lcsh:Q
Priming (psychology)
Subjects
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 10
- Database :
- OpenAIRE
- Journal :
- Nature Communications
- Accession number :
- edsair.doi.dedup.....a3f276dd7670d45da0eb1147b9679978