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Publication Information

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Title: Temperature and vegetation effects on soil organic carbon quality along a forested mean annual temperature gradient in North America

Author: Fissore, Cinzia; Giardina, Christian P.; Kolka, Randall K.; Trettin, Carl C.; King, Gary M.; Jurgensen, Martin F.; Barton, Christopher D.; McDowell, S. Douglas

Date: 2008

Source: Global Change Biology. 14: 193-205.

Publication Series: Scientific Journal (JRNL)

Description: Both climate and plant species are hypothesized to influence soil organic carbon (SOC) quality, but accurate prediction of how SOC process rates respond to global change will require an improved understanding of how SOC quality varies with mean annual temperature (MAT) and forest type. We investigated SOC quality in paired hardwood and pine stands growing in coarse textured soils located along a 22 °C gradient in MAT. To do this, we conducted 80-day incubation experiments at 10 and 30 1C to quantify SOC decomposition rates, which we used to kinetically define SOC quality. We used these experiments to test the hypotheses that SOC quality decreases with MAT, and that SOC quality is higher under pine than hardwood tree species.

Keywords: global warming, labile SOC, mean annual temperature, Q10, stable SOC, temperate forests, tree species composition

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Fissore, Cinzia; Giardina, Christian P.; Kolka, Randall K.; Trettin, Carl C.; King, Gary M.; Jurgensen, Martin F.; Barton, Christopher D.; McDowell, S. Douglas 2008. Temperature and vegetation effects on soil organic carbon quality along a forested mean annual temperature gradient in North America. Global Change Biology. 14: 193-205.

 


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