The Temperature Sensitivity (Q10) of Soil Respiration: Controlling Factors and Spatial Prediction at Regional Scale Based on Environmental Soil Classes
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| Title: | Main Title: The Temperature Sensitivity (Q10) of Soil Respiration: Controlling Factors and Spatial Prediction at Regional Scale Based on Environmental Soil Classes |
| Description: | Abstract: The temperature sensitivity of heterotrophic soil respiration is crucial for modeling carbon dynamics but it is variable. Presently, however, most models employ a fixed value of 1.5 or 2.0 for the increase of soil respiration per 10°C increase in temperature (Q10). Here we identified the variability of Q10 at a regional scale (Rur catchment, Germany/Belgium/Netherlands). We divided the study catchment into environmental soil classes (ESCs), which we define as unique combinations of land use, aggregated soil groups, and texture. We took nine soil samples from each ESC (108 samples) and incubated them at four soil moisture levels and five temperatures (5–25°C). We hypothesized that Q10 variability is controlled by soil organic carbon (SOC) degradability and soil moisture and that ESC can be used as a widely available proxy for Q10, owing to differences in SOC degradability. Measured Q10 values ranged from 1.2 to 2.8 and were
correlated with indicators of SOC degradability (e.g., pH, r = -0.52). The effect of soil moisture on Q10 was variable: Q10 increased with moisture in croplands but decreased in forests. The ESC captured significant parts of Q10 variability under dry (R2 = 0.44) and intermediate (R2 = 0.36) moisture conditions, where Q10
increased in the order cropland |
| Identifier: | 10.1002/2017GB005644 (DOI) |
Responsible Party
| Creators: | Nele Meyer (Author), Gerd Welp (Author), Wulf Amelung (Author) |
| Publisher: | Wiley |
| Publication Year: | 2018 |
Topic
| TR32 Topic: | Soil |
| Related Subproject: | B3 |
| Subjects: | Keywords: Soil Organic Matter, Soil Respiration, Soil Temperature |
File Details
| Filename: | Meyer_2018_Global_Biogeochemical_Cycles.pdf |
| Data Type: | Text - Article |
| File Size: | 4 MB |
| Date: | Accepted: 09.02.2018 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Only Project Members |
| General Access and Use Conditions: | According to the TR32DB data policy agreement. |
| Access Limitations: | According to the TR32DB data policy agreement. |
| Licence: | [TR32DB] Data policy agreement |
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Specific Information - Publication
| Publication Status: | Published |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | Global Biogeochemical Cycles |
| Issue: | 2 |
| Volume: | 32 |
| Number of Pages: | 18 (306 - 323) |
Metadata Details
| Metadata Creator: | Nele Meyer |
| Metadata Created: | 26.02.2018 |
| Metadata Last Updated: | 26.02.2018 |
| Subproject: | B3 |
| Funding Phase: | 3 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Metadata Downloads: | 0 |
| Dataset Downloads: | 1 |
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