Web of Science: 56 cites, Scopus: 57 cites, Google Scholar: cites,
Global pattern and controls of soil microbial metabolic quotient
Xu, Xiaofeng (San Diego State University. Biology Department)
Schimel, Joshua P. (University of California, Santa Barbara. Department of Ecology, Evolutionary, and Marine Biology)
Janssens, Ivan A. (University of Antwerp (Bèlgica))
Song, Xia (San Diego State University. Biology Department)
Song, Changchun (Zhongguo ke xue yuan. Northeast Institute of Geography and Agroecology)
Yu, Guirui (Zhongguo ke xue yuan.. Institute of Geology and Natural Resources Research)
Sinsabaugh, Robert L. (University of New Mexico. Department of Biology)
Tang, Diandong (Beijing shi fan da xue. Department of Chemistry)
Zhang, Xiaochun (San Diego State University. Biology Department)
Thorn, Peter. E. (Oak Ridge National Laboratory. Climate Change Science Institute and Environmental Sciences Division)

Data: 2017
Resum: imbalance.
Resum: The microbial metabolic quotient (MMQ), microbial respiration per unit of biomass, is a fundamental factor controlling heterotrophic respiration, the largest carbon flux in soils. The magnitude and controls of MMQ at regional scale remain uncertain. We compiled a comprehensive data set of MMQ to investigate the global patterns and controls of MMQ in top 30 cm soils. Published MMQ values, generally measured in laboratory microcosms, were adjusted on ambient soil temperature using long-term (30 yr) average site soil temperature and a Q₁₀ = 2. The area-weighted global average of MMQ_Soil is estimated as 1. 8 (1. 5-2. 2) (95% confidence interval) μmol C·h⁻¹·mmol⁻¹ microbial biomass carbon (MBC) with substantial variations across biomes and between cropland and natural ecosystems. Variation was most closely associated with biological factors, followed by edaphic and meteorological parameters. MMQ_Soil was greatest in sandy clay and sandy clay loam and showed a pH maximum of 6. 7 ± 0. 1 (mean ± se). At large scale, MMQ_Soil varied with latitude and mean annual temperature (MAT), and was negatively correlated with microbial N:P ratio, supporting growth rate theory. These trends led to large differences in MMQ_Soil between natural ecosystems and cropland. When MMQ was adjusted to 11°C (MMQ_Ref), the global MAT in the top 30 cm of soils, the area-weighted global averages of MMQ_Ref was 1. 5 (1. 3-1. 8) μmol C·mmol MBC⁻¹·h⁻¹. The values, trends, and controls of MMQ_Soil add to our understanding of soil microbial influences on soil carbon cycling and could be used to represent microbial activity in global carbon models.
Ajuts: European Commission 610028
Drets: Tots els drets reservats
Llengua: Anglès
Document: Article ; recerca ; Versió acceptada per publicar
Matèria: Basal respiration ; Edaphic factor ; Meteorology ; Microbial metabolic quotient ; PH ; Soil micro-bial biomass
Publicat a: Ecological monographs, Vol. 87, issue 3 (Aug. 2017) , p. 429-441, ISSN 0012-9615

DOI: 10.1002/ecm.1258

39 p, 831.4 KB

El registre apareix a les col·leccions:
Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
Articles > Articles de recerca
Articles > Articles publicats

 Registre creat el 2017-11-06, darrera modificació el 2021-08-08

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