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Season, but not experimental warming, affects the activity and temperature sensitivity of extracellular enzymes
- Source :
- Biogeochemistry. 131:255-265
- Publication Year :
- 2016
- Publisher :
- Springer Science and Business Media LLC, 2016.
-
Abstract
- Climate change may affect the microbial production and temperature sensitivity of extracellular enzymes that release carbon (C) and nutrients from soil organic matter. We measured the response of six hydrolytic enzymes involved in C, nitrogen (N), and phosphorus (P) degradation to experimental warming in a mixed-deciduous forest persisting on highly-weathered Ultisols (Whitehall Forest, Georgia, US). We found that warming produced no consistent enzyme response. However, we observed significant seasonal variation in enzyme activities, temperature sensitivities and elemental enzyme ratios (C:N and C:P). Seasonal differences in enzyme activity and temperature sensitivity were best explained by soil moisture and temperature. Our results suggest that seasonal dynamics in soil microclimate, organic matter supply, and microbial demand exert more control on enzyme dynamics than does a uniform increase in soil temperature.
- Subjects :
- chemistry.chemical_classification
010504 meteorology & atmospheric sciences
biology
Chemistry
Soil organic matter
Phosphorus
chemistry.chemical_element
04 agricultural and veterinary sciences
Ultisol
01 natural sciences
Enzyme assay
Nutrient
Environmental chemistry
040103 agronomy & agriculture
biology.protein
0401 agriculture, forestry, and fisheries
Environmental Chemistry
Ecosystem
Organic matter
Water content
0105 earth and related environmental sciences
Earth-Surface Processes
Water Science and Technology
Subjects
Details
- ISSN :
- 1573515X and 01682563
- Volume :
- 131
- Database :
- OpenAIRE
- Journal :
- Biogeochemistry
- Accession number :
- edsair.doi...........26000b133b267080bfea20b34df0a9e9