Ecological Archives E094-034-A2

Vidya Suseela, Jeffrey S. Dukes. 2013. The responses of soil and rhizosphere respiration to simulated climatic changes vary by season. Ecology 94:403–413. http://dx.doi.org/10.1890/12-0150.1

Appendix B. Detailed results of the seasonal variation in apparent Q10 and coefficients of Rs and Rr.

Temperature sensitivity of Rs: During spring, high and medium levels of warming decreased apparent Q10 and coefficient b, and increased coefficient a compared to the low and unwarmed treatments (P < 0.05). During fall, high levels of warming decreased apparent Q10 and coefficient b, and increased coefficient a compared to the unwarmed treatment (P < 0.05). Drought also decreased apparent Q10 and coefficient b and increased coefficient a compared to the ambient and wet precipitation treatments in fall (P < 0.05).

Temperature sensitivity of Rr: Low warming marginally decreased Q10 compared to the unwarmed treatment (P = 0.053). High warming increased basal respiration (coefficient a) and decreased coefficient b compared to the unwarmed treatment. Both medium and high warming also increased basal respiration (P < 0.01) and decreased coefficient b (P < 0.01) compared to the low and unwarmed treatment.


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