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Differential soil respiration responses to changing hydrologic regimesAuthor(s): Vincent J. Pacific; Brian L. McGlynn; Diego A. Riveros-Iregui; Howard E. Epstein; Daniel L. Welsch
Source: Water Resources Research. 45: W07201.
Publication Series: Scientific Journal (JRNL)
Station: Rocky Mountain Research Station
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DescriptionSoil respiration is tightly coupled to the hydrologic cycle (i.e., snowmelt and precipitation timing and magnitude). We examined riparian and hillslope soil respiration across a wet (2005) and a dry (2006) growing season in a subalpine catchment. When comparing the riparian zones, cumulative CO2 efflux was 33% higher, and peak efflux occurred 17 days earlier during the dry growing season. In contrast, cumulative efflux in the hillslopes was 8% lower, and peak efflux occurred 10 days earlier during the drier growing season. Our results demonstrate that soil respiration was more sensitive to drier growing season conditions in wet (riparian) landscape positions.
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CitationPacific, Vincent J.; McGlynn, Brian L.; Riveros-Iregui, Diego A.; Epstein, Howard E.; Welsch, Daniel L. 2009. Differential soil respiration responses to changing hydrologic regimes. Water Resources Research. 45: W07201.
Keywordssoil respiration, hydrologic cycle, hillslopes, riparian zones
- Landscape structure, groundwater dynamics, and soil water content influence soil respiration across riparian-hillslope transitions in the Tenderfoot Creek Experimental Forest, Montana
- Hydrology and landscape structure control subalpine catchment carbon export
- Variability in soil CO2 production and surface CO2 efflux across riparian-hillslope transitions
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